JP6903882B2 - Controls, control methods, and programs - Google Patents

Description

The present invention relates to a technique for stabilizing an electric power system.

Power generation devices that use renewable energy such as sunlight are becoming widespread. The output of a power generation device that uses such renewable energy frequently fluctuates due to the influence of the environment (weather, etc.). Therefore, as the number of power generation devices that use renewable energy increases, it is predicted that the influence on the supply and demand balance of electric power in the grid will increase. Then, if the fluctuation of the power supply and demand balance of the grid cannot be absorbed by the existing mechanism, a serious problem may occur in the power supply such as the occurrence of a power failure. Therefore, a technique for keeping the frequency of the system in an appropriate range is required.

An example of a technique for keeping the frequency of the system in an appropriate range is disclosed in Patent Documents 1 and 2 below. Patent Document 1 below discloses a technique for adjusting the system frequency by increasing or decreasing the output from the photovoltaic power generation facility. Further, Patent Document 2 below discloses a technique for suppressing fluctuations in system frequency by charging / discharging an storage storage device (storage battery).

Japanese Unexamined Patent Publication No. 2011-060921 Japanese Patent No. 5633872

In a situation where a power generation device that generates electricity by sunlight and a power storage device are connected to the same transmission line via a distribution board of a consumer, each device independently performs an operation for stabilizing the frequency. Then, the frequency stabilizing effect may not be obtained well.

An object of the present invention is to provide a technique that contributes to the stabilization of the frequency of an electric power system by using a power generation device and a power storage device.

According to the present invention
Information acquisition means for acquiring frequency information indicating the frequency of the system,
Using the frequency information, a control means for generating a first control signal for a power storage device and a second control signal for a power generation device, and
An output means that transmits the first control signal to the power storage device and outputs the second control signal to the power generation device.
With
The control means
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the first threshold value and the difference is a positive value, the first control signal causes the power storage device to execute the charging operation. It generates a control signal,
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the first threshold value and the difference is a negative value, the control signal for causing the power storage device to execute the discharge operation is transmitted. Generated as the first control signal
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the second threshold value smaller than the first threshold value and the difference is a positive value, the output of the power generation device is reduced. A control signal is generated as the second control signal ,
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the second threshold value and the difference is a negative value, the control signal for increasing the output of the power generation device is the first. 2 Generated as a control signal ,
A control device is provided.
Further, according to the present invention.
Information acquisition means for acquiring frequency information indicating the frequency of the system,
Using the frequency information, a control means for generating a first control signal for a power storage device and a second control signal for a power generation device, and
An output means that transmits the first control signal to the power storage device and outputs the second control signal to the power generation device.
With
The control means
Wherein when the frequency information is frequency indicated is controlled to reduce the output of the power generator by the second control signal in response to exceeding the reference value, the absolute value of the difference between the reference value and the frequency There exceeds a first threshold, and if the difference is a positive value, to execute the charging operation to the power storage device by the first control signal,
Absolute difference between the frequency and the reference value when the second control signal is used to control the output of the power generator to increase in response to the frequency indicated by the frequency information falling below the reference value. When the value exceeds the first threshold value and the difference is a negative value, the first control signal causes the power storage device to execute a discharge operation.
A control device is provided.

According to the present invention
The computer
Acquire frequency information indicating the frequency of the system,
Using the frequency information, a first control signal for the power storage device and a second control signal for the power generation device are generated.
The first control signal is transmitted to the power storage device, and the second control signal is output to the power generation device.
Including that
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the first threshold value and the difference is a positive value, the first control signal causes the power storage device to execute the charging operation. It generates a control signal,
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the first threshold value and the difference is a negative value, the control signal for causing the power storage device to execute the discharge operation is transmitted. Generated as the first control signal
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the second threshold value smaller than the first threshold value and the difference is a positive value, the output of the power generation device is reduced. A control signal is generated as the second control signal ,
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the second threshold value and the difference is a negative value, the control signal for increasing the output of the power generation device is the first. 2 A control method is provided, which is generated as a control signal.
Further, according to the present invention.
The computer
Acquire frequency information indicating the frequency of the system,
Using the frequency information, a first control signal for the power storage device and a second control signal for the power generation device are generated.
The first control signal is transmitted to the power storage device, and the second control signal is output to the power generation device.
Including that
Wherein when the frequency information is frequency indicated is controlled to reduce the output of the power generator by the second control signal in response to exceeding the reference value, the absolute value of the difference between the reference value and the frequency There exceeds a first threshold, and if the difference is a positive value, to execute the charging operation to the power storage device by the first control signal,
Absolute difference between the frequency and the reference value when the second control signal is used to control the output of the power generator to increase in response to the frequency indicated by the frequency information falling below the reference value. When the value exceeds the first threshold value and the difference is a negative value, the first control signal causes the power storage device to execute a discharge operation.
A control method is provided.

According to the present invention
Computer,
Information acquisition means for acquiring frequency information indicating the frequency of the system,
It is a means for generating a first control signal for a power storage device and a second control signal for a power generation device by using the frequency information.
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the first threshold value and the difference is a positive value, the first control signal causes the power storage device to execute the charging operation. It generates a control signal,
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the first threshold value and the difference is a negative value, the control signal for causing the power storage device to execute the discharge operation is transmitted. Generated as the first control signal
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the second threshold value smaller than the first threshold value and the difference is a positive value, the output of the power generation device is reduced. A control signal is generated as the second control signal ,
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the second threshold value and the difference is a negative value, the control signal for increasing the output of the power generation device is the first. 2 Generated as a control signal,
Control means and
An output means that transmits the first control signal to the power storage device and outputs the second control signal to the power generation device.
A program is provided to make it function as.
Further, according to the present invention.
Computer,
Information acquisition means for acquiring frequency information indicating the frequency of the system,
Using the frequency information, a control means for generating a first control signal for a power storage device and a second control signal for a power generation device, and
An output means that transmits the first control signal to the power storage device and outputs the second control signal to the power generation device.
To function as
The control means
Wherein when the frequency information is frequency indicated is controlled to reduce the output of the power generator by the second control signal in response to exceeding the reference value, the absolute value of the difference between the reference value and the frequency There exceeds a first threshold, and if the difference is a positive value, to execute the charging operation to the power storage device by the first control signal,
Absolute difference between the frequency and the reference value when the second control signal is used to control the output of the power generator to increase in response to the frequency indicated by the frequency information falling below the reference value. When the value exceeds the first threshold value and the difference is a negative value, the first control signal causes the power storage device to execute a discharge operation.
The program is provided.

According to the present invention, the frequency of the electric power system can be stabilized by using the power generation device and the power storage device.

It is a block diagram which conceptually shows an example of the control system in 1st Embodiment. It is a block diagram which conceptually shows the functional structure of the control device of 1st Embodiment. It is a block diagram which conceptually shows the hardware configuration of each device of a control system. It is a flowchart which shows the process flow in the 1st operation example of a control system. It is a figure for demonstrating concretely about the 1st operation example. It is a figure for demonstrating concretely about the 1st operation example. It is a flowchart which shows the process flow in the 2nd operation example of a control system. It is a figure for demonstrating the 2nd operation example concretely. It is a flowchart which shows the process flow in the 3rd operation example of a control system. It is a figure for demonstrating the 3rd operation example concretely. It is a block diagram which conceptually shows the functional structure of the control device of 3rd Embodiment. It is a flowchart which shows the process flow of the control apparatus of 3rd Embodiment. It is a figure for demonstrating an example of the operation of the control device of 3rd Embodiment. It is a figure for demonstrating an example of the operation of the control device of 3rd Embodiment. It is a figure for demonstrating an example of the operation of the control device of 3rd Embodiment. It is a figure for demonstrating an example of the operation of the control device of 3rd Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all drawings, similar components are designated by the same reference numerals, and description thereof will be omitted as appropriate. Further, in each block diagram, unless otherwise specified, each block represents a functional unit configuration rather than a hardware unit configuration. Further, in the present specification, "acquisition" or "reading" means that the own device retrieves data or information stored in another device or storage medium (active acquisition), for example, other. Requesting or inquiring to the device to receive it, accessing and reading other devices and storage media, etc., and inputting data or information output from other devices to the own device (passive acquisition) , For example, receiving at least one of the data or information to be delivered (or transmitted, push notification, etc.). It also includes selecting and acquiring the received data or information, or selecting and receiving the delivered data or information.

[First Embodiment]
Hereinafter, the control system according to the present invention will be described. The control system according to the present specification is constructed for one or more consumers.

[System overview]
FIG. 1 is a block diagram conceptually showing an example of the control system 1000 according to the first embodiment. In FIG. 1, the solid line means a power line and the dotted line means a communication line. As shown in FIG. 1, the control system 1000 includes a control device 10, a CT (Current Transformer) sensor 50 for the system, a power generation device 20, a PCS (Power Conditioning System) 22 for the power generation device 20, a power storage device 30, and a power storage device. It has a CT sensor 60 for the device 30 and a PCS 32 for the power storage device 30. These components are provided on the consumer side.

The CT sensor 50 is provided on the power line 42 and measures the frequency of the system 40 and the like. The CT sensor 50 is provided near a point connected to the system 40, and can measure the frequency of the power supplied from the system 40 to the power line 42. Further, the CT sensor 50 can measure the total amount of electric power consumed on the downstream side with the system 40 side as the upstream side.

The power generation device 20 is a device that generates power by using renewable energy such as solar power and wind power. The power generation device 20 is connected to the power line 42 via the PCS 22 for the power generation device 20. Although not shown in the figure, a plurality of power generation devices 20 may be provided.

The power storage device 30 includes a storage battery (for example, a lithium ion battery, a nickel hydrogen battery, a sodium sulfur battery, etc.) and a BMU (Battery Management Unit) (not shown), and receives power from the system 40 and the power generation device 20. , A device that stores electric power in the storage battery. The power storage device 30 is connected to the power line 42 via the PCS 32 for the power storage device 30. Although not shown in the figure, a plurality of power storage devices 30 may be provided. Further, the PCS 32 may be provided in the power storage device 30.

The configuration of the control system 1000 is not limited to the example shown in FIG. For example, the PCS 22 for the power generation device 20 and the PCS 32 for the power storage device 30 may be an integrated PCS (so-called hybrid PCS) common to the power generation device 20 and the power storage device 30. Further, in the configuration of FIG. 1, a load (for example, an electronic device used by a consumer) and another power storage device not related to the following description may be further connected to the power line 42.

The control device 10 controls the output of the power generation device 20 and the charge / discharge operation of the power storage device 30 based on the information obtained from the CT sensor 50. Further, the control device 10 may be connected to an external device (for example, a server device) (not shown), and may be configured to acquire other information necessary for control from the external device.

[Functional configuration]
FIG. 2 is a block diagram conceptually showing the functional configuration of the control device 10 of the first embodiment. As shown in FIG. 2, the control device 10 includes an information acquisition unit 110, a control unit 120, and an output unit 130.

The information acquisition unit 110 acquires information (frequency information) including at least one of the system frequency and the ancillary command. The information acquisition unit 110 can acquire information indicating the frequency of the system via the CT sensor 50 of FIG. In addition, the information acquisition unit 110 can acquire an ancillary command via an external device (for example, an information processing device of a general electric power company) (not shown).

Here, the ancillary command includes, for example, a command regarding the direction of operation in a predetermined period and the power value required in that period. There are two types of "directions of operation". With the system 40 side as the upstream, there is a direction from upstream to downstream (hereinafter referred to as "forward power flow direction") and a direction from downstream to upstream (hereinafter referred to as "reverse power flow direction"). The ancillary command in the forward tide direction is transmitted when the power supply exceeds the power demand in the system 40 and an increase in the power demand is desired to stabilize the supply-demand balance. In other words, the ancillary command in the forward current direction is transmitted to eliminate the state where the frequency of the system 40 is higher than the reference value (the state where the voltage of the system 40 is higher than the reference value). On the contrary, the reverse power flow direction ancillary command is transmitted when the power demand exceeds the power supply in the system 40 and an increase in the power supply is desired to stabilize the supply and demand balance. In other words, the reverse power flow direction ancillary command is transmitted to eliminate the state where the frequency of the system 40 is lower than the reference value (the state where the voltage of the system 40 is lower than the reference value).

Further, there are the following differences between the control based on the frequency information (system frequency) acquired from the CT sensor 50 and the control based on the ancillary command transmitted from the external device.

The frequency information acquired from the CT sensor 50 is information representing the frequency of the system 40 in real time, and includes a short-period component of the system frequency. In order to stabilize this short-period component, the control device 10 of the present invention links the power generation device 20 and the power storage device 30 to suppress the fluctuation range of the frequency from the reference value. In this case, the control device 10 can suppress the fluctuation range of the short-period component by controlling the relative increase / decrease in electric power. For example, when the frequency of the system 40 is higher than a predetermined reference value, it is preferable to control the power in the forward power flow direction from the system 40 to the customer's house, but it is preferable to control the power from the customer's house to the system 40. The fluctuation range of the short-period component can be suppressed only by controlling to reduce the electric power in the reverse power flow direction.

On the other hand, the frequency information (ancillary command) from the external device is the information for stabilizing the medium-period component of the system frequency. Based on this ancillary command, the control device 10 controls the frequency to approach a reference value (for example, 50 Hz) in a designated period. Therefore, for example, when an ancillary command in the reverse power flow direction is issued, the control device 10 of the present invention is not controlled by the relative increase / decrease in electric power as described above, but in the reverse power flow direction from the customer's house to the system 40. It is necessary to control the operation of the power generation device 20 and the power storage device 30 so that electric power is generated.

The control unit 120 uses the frequency information acquired by the information acquisition unit 110 to obtain a control signal for the power storage device 30 (hereinafter, also referred to as "first control signal") and a control signal for the power generation device 20 (hereinafter, "". The second control signal "also referred to as") is generated.

For example, when the information acquisition unit 110 acquires information indicating the frequency of the system 40, the control unit 120 compares the frequency of the system 40 with a predetermined reference value (for example, 50 Hz or 60 Hz). Then, the control unit 120 adjusts the power supply-demand balance when the frequency of the system 40 becomes higher or lower than the predetermined reference value (that is, when the power supply-demand balance is lost). A control signal and a second control signal are generated. When the frequency of the system 40 becomes higher than a predetermined value, the control unit 120 causes the power storage device 30 and the power generation device 20 to perform an operation that increases the power demand and lowers the frequency of the system 40. Generates a signal and a second control signal. Further, when the frequency of the system 40 becomes lower than a predetermined value, the control unit 120 causes the power storage device 30 and the power generation device 20 to perform an operation that produces an effect of increasing the power supply and raising the frequency of the system 40. Generates 1 control signal and 2nd control signal.

When the information acquisition unit 110 acquires an ancillary command, the control unit 120 generates a first control signal and a second control signal based on whether the command is in the forward power flow direction or the reverse power flow direction. When the acquired ancillary command is a command in the forward flow direction (that is, a direction in which the power demand is increased), the control unit 120 performs an operation that produces an effect of increasing the power demand and lowering the frequency of the system 40. And the first control signal and the second control signal to be executed by the power generation device 20 are generated. Further, when the acquired ancillary command is a command in the reverse power flow direction (that is, a direction in which the power supply is increased), the control unit 120 stores an operation that produces an effect of increasing the power supply and raising the frequency of the system 40. The first control signal and the second control signal to be executed by the device 30 and the power generation device 20 are generated.

The specific operation of the control unit 120 will be described in another embodiment.

The output unit 130 transmits the first control signal generated by the control unit 120 to the PCS 32 for the power storage device 30. The PCS 32 for the power storage device 30 controls the charging / discharging operation of the power storage device 30 according to the first control signal received from the output unit 130. Further, the second control signal generated by the control unit 120 is transmitted to the PCS 22 for the power generation device 20. The PCS 22 for the power generation device 20 controls the output of the power generation device 20 according to the second control signal received from the output unit 130.

As described above, according to the present embodiment, the power generation device 20 and the power storage device 30 cooperate with each other to bring the frequency of the system 40 closer to a predetermined reference value and stabilize the power of the system 40.

[Second Embodiment]
In this embodiment, the first embodiment will be described in more detail.

[Hardware configuration]
Each functional component of each device included in the control system 1000 may be realized by hardware (eg, hard-wired electronic circuit, etc.) that realizes each functional component, or hardware and software. It may be realized by a combination (eg, a combination of an electronic circuit and a program that controls it). Hereinafter, a case where each functional component of each device included in the control system 1000 is realized by a combination of hardware and software will be further described.

FIG. 3 is a block diagram conceptually showing the hardware configuration of each device of the control system 1000.

The control device 10 includes a bus 101, a processor 102, a memory 103, a storage 104, an input / output interface 105, and a communication interface 106. Bus 101 is a data transmission line for transmitting and receiving data. The processor 102, the memory 103, the storage 104, the input / output interface 105, and the communication interface 106 transmit and receive data to and from each other via the bus 101. However, the method of connecting the processors 102 and the like to each other is not limited to the bus connection.

The processor 102 is an arithmetic processing unit such as a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit). The memory 103 is a memory such as a RAM (Random Access Memory) or a ROM (Read Only Memory). The storage 104 is a storage device such as an HDD (Hard Disk Drive), an SSD (Solid State Drive), or a memory card. Further, the storage 104 may be a memory such as a RAM or a ROM.

The storage 104 stores a program module that realizes the functional component units (information acquisition unit 110, control unit 120, output unit 130) of the control device 10. By executing each of these program modules, the processor 102 realizes each functional component corresponding to the program module. Here, when the processor 102 executes each of the program modules, the processor 102 may be executed after reading these program modules into the memory 103, or may be executed without being read into the memory 103.

The input / output interface 105 is an interface for connecting the control device 10 and the input / output device. The input / output interface 105 connects an input device such as a keyboard, a display device such as a CRT (Cathode Ray Tube) display or an LCD (Liquid Crystal Display), and a touch panel in which these input devices and the display device are integrated to the control device 10. can do.

The communication interface 106 can connect the control device 10 and an external device (for example, a CT sensor 50, a PCS 22 for a power generation device 20, a PCS 32 for a power storage device 30, etc.) via various networks. The communication method of the communication interface 106 is not particularly limited. The first control signal generated by the control unit 120 is transmitted from the communication interface 106 to the PCS 32 for the power storage device 30 via the communication line. Then, the PCS 32 for the power storage device 30 controls the charge / discharge operation of the power storage device 30 according to the first control signal received from the control device 10. Further, the second control signal generated by the control unit 120 is transmitted to the PCS 22 for the power generation device 20 via the communication interface 106. Then, the PCS 22 for the power generation device 20 controls the output of the power generation device 20 according to the second control signal received from the control device 10.

The hardware configuration of each device included in the control system 1000 is not limited to the configuration shown in FIG. 7.

[Operation example]
Hereinafter, the specific operation of the control device 10 will be described. In the following operation example, the control unit 120 determines whether or not the frequency of the system 40 is higher than a predetermined reference value, and uses the determination result to control the charging / discharging operation of the power storage device 30. A signal and a second control signal for controlling the output of the power generation device 20 are generated. Here, the predetermined reference value is, for example, the rated frequency of the system 40 (for example, 50 Hz or 60 Hz). However, the reference value is not limited to the values exemplified here, and can be changed as necessary.

<First operation example>
A first operation example of the control system 1000 will be described with reference to FIG. Further, FIG. 4 is a flowchart showing a processing flow in the first operation example of the control system 1000.

First, the frequency of the power supplied from the system 40 is measured by the CT sensor 50, and the information acquisition unit 110 acquires the measured frequency as frequency information (S102).

Then, the control unit 120 compares, for example, the predetermined reference values (50 Hz and 60 Hz) held in the memory 103 or the storage 104 with the frequency of the frequency information acquired in S102 (S104). Then, the control unit 120 generates a first control signal and a second control signal based on the result of the comparison (S106).

Then, the output unit 130 outputs the first control signal and the second control signal generated by the control unit 120 to the PCS 32 for the power storage device 30 and the PCS 22 for the power generation device 20, respectively (S108). A specific example of this operation is given below.

<< Specific Example 1 >>
FIG. 5 is a diagram for specifically explaining the first operation example. FIG. 5 shows changes in the frequency of the system 40, the output of the power generation device 20, and the output of the power storage device 30.

In the example of FIG. 5, the period up to time _{t 1,} the period of time _{t 3} from the time _{t 2, the} period of time _{t 5} from time _{t 4,} and, at time _{t 6} after the period, the frequency of the system 40 is in a predetermined It exceeds the standard value (50 Hz here). Then, to approximate the frequency of the system 40 to a predetermined reference value, the output of the generator 20 is limited to suppress the output value (P _a), the charging operation of power storage device 30 is executed.

Further, in the example of FIG. 5, the frequency of the system 40 is a predetermined reference value in _{the period from time t 1} to time t ₂ , the period from time t ₃ to time t ₄ , and the period from time t _{5 to time t 6.} Below. Then, to approximate the frequency of the system 40 to a predetermined reference value, with up to output suppression output value of the power generation device 20 can output value from (P _a) (P _Max), the operation of the power storage device 30 (charging operation) It will be stopped.

In the present specification, the possible output value (P _Max ) means the actual generated power of the power generation device 20 generated from the power generation device 20 at a certain time point. The possible output value (P _Max ) of the power generation device 20 may fluctuate depending on the environment at the time of power generation (for example, weather), but in some figures including this figure, the power generation device 20 is possible for convenience of explanation. The output value (P _Max ) is drawn as a constant value. Hereinafter, the operation of the control device 10 in the example of FIG. 5 will be described in more detail.

The control unit 120, the frequency of the frequency information is higher than a reference value, generates a second control signal to suppress the output of the generator 20 to suppress the output value (P _a). Then, the output unit 130 transmits the second control signal generated by the control unit 120 to the PCS 22 for the power generation device 20 via the communication interface 106. PCS22 for power generation apparatus 20 in accordance with a second control signal outputted from the output unit 130 limits the output by power from the power generator 20 second suppression output value control signal shown in (P _a).

Here suppress the output value _{(P a)} is defined as a value lower than the possible output value of the power generation device 20 _{(P Max).} Thus, when the frequency of the system 40 is above the predetermined reference value, _- the power calculated by the equation of "possible output value (P _Max) suppress the output value (P _a)" is the power generating device 20 It is secured as spare capacity (adjustable power). This adjustable power can be used for the operation for stabilizing the frequency of the system 40 when the supply and demand balance of the system 40 fluctuates and the frequency of the system 40 falls below a predetermined reference value.

Suppressing the output value (P _a) is, for example, can be defined as a value obtained by multiplying the possible output value of the power generation device 20 (P _Max) to a predetermined coefficient α (0 ≦ α <1) . The coefficient α may be stored in advance in, for example, a memory 103 or a storage 104. In this case, the control unit 120 reads out the coefficient α stored in the memory 103 or the storage 104. Then, the control unit 120 may allow the output value of the information acquisition unit 110 is power generating apparatus obtained from PCS22 the network interface 106 power generator via a 20 20 _{(P Max),} suppression output by multiplying the read coefficients α calculating a value _{(P a).} Further, suppression output value (P _a) is a predetermined value lower than the theoretical power generation value of the power generation device 20, for example may be stored in a memory 103 or storage 104.

The control unit 120 can also switch a plurality of suppressed output values according to the situation. For example, when the possible output value of the power generation device 20 is equal to or higher than the first suppression output value (predetermined value), the control unit 120 uses the first suppression output value, and the possible output value of the power generation device 20 is set. When it is smaller than the first suppression output value, the second suppression output value obtained by multiplying the possible output value by the coefficient α may be used.

As a result, when the frequency of the system 40 is high (in other words, the power supply in the system 40 is excessive), the power output from the power generation device 20 is suppressed, so that the power supply to the system 40 is reduced. To do. Therefore, the balance between supply and demand of electric power in the system 40 is improved, and the effect of stabilizing the frequency of the system 40 can be obtained.

Further, the control unit 120 generates a first control signal for causing the power storage device 30 to execute the charging operation, for example, as follows.

Specifically, the control unit 120, the charging performance of the power storage device 30 (charging capability per unit time: Unit [W]) obtains the charging performance suppress the output value of the electric storage device 30 (P _a: Unit [W] ) Determine if it is above or not. The charging performance of the power storage device 30 is stored in advance in, for example, the memory 103 or the storage 104 of the control device 10.

If the charging performance of the power storage device 30 is suppressed output value (P _a) above, the control unit 120 generates a first control signal for executing the operation of charging the power suppression output value (P _a) partial storage device 30 To do. Then, the output unit 130 transmits the first control signal generated by the control unit 120 to the PCS 32 for the power storage device 30 via the communication interface 106. The PCS 32 for the power storage device 30 causes the power storage device 30 to perform an operation of charging the electric power corresponding to the suppressed output value according to the first control signal output from the output unit 130.

As a result, when the frequency of the system 40 is high (in other words, the power supply in the system 40 is excessive), a new power demand is generated by the charging operation of the power storage device 30. Therefore, the balance between supply and demand of electric power in the system 40 is improved, and the effect of stabilizing the frequency of the system 40 can be obtained. Also in this case, the power supply from the power generator 20 and the (suppressed output value (P _a) component of the power supply), and is balanced power demand produced by the charging operation of the electrical storage device 30. Therefore, the power output from the power generation device 20 does not flow into the system 40, and the effect of preventing the frequency of the system 40 from rising can be obtained.

Incidentally, when the charging performance of the power storage device 30 exceeds the suppression output value (P _a), the control unit 120, a first control signal for executing the charging operation in the power storage device 30 at the upper limit value of the charging performance of the power storage device 30 It may be generated. In this case, PCS 32 for power storage device 30, it executes the following first control signal, the operation of charging power above (suppress power output value (P _a)) power output from the power generating device 20 to the storage device 30 Let me.

As a result, when the frequency of the system 40 is high (in other words, the power supply in the system 40 is excessive), a new power demand is generated by the charging operation of the power storage device 30. Therefore, the balance between supply and demand of electric power in the system 40 is improved, and the effect of stabilizing the frequency of the system 40 can be obtained. Also in this case, the power demand to be generated by the charging operation of the power storage device 30 is greater than the power supply from the power generation device 20 (suppressing output value (P _a) component of the power supply). Since the electric power exceeding the electric power supply from the power generation device 20 is supplied from the system 40, as a result, the effect of lowering the frequency of the system 40 can be obtained.

On the other hand, if the charging performance of the power storage device 30 is less than the suppression output value (P _a), the control unit 120 generates a first control signal for executing the charging operation in the power storage device 30 at the upper limit value of the charging performance of the power storage device 30 To do. Then, the output unit 130 transmits the first control signal generated by the control unit 120 to the PCS 32 for the power storage device 30 via the communication interface 106. The PCS 32 for the power storage device 30 causes the power storage device 30 to execute a charging operation based on the upper limit value of the charging performance according to the first control signal output from the output unit 130.

As a result, when the frequency of the system 40 is high (in other words, the power supply in the system 40 is excessive), a new power demand is generated by the charging operation of the power storage device 30. Therefore, the balance between supply and demand of electric power in the system 40 is improved, and the effect of stabilizing the frequency of the system 40 can be obtained. Also in this case, at least part of the power outputted from the power generator 20 (suppressing output value (P _a) partial power) is consumed by the charging operation of the electric storage device 30. Therefore, the electric power output from the power generation device 20 and flowing into the system 40 becomes small, and the increase in the frequency of the system 40 can be suppressed.

The control unit 120, when the frequency of the frequency information is lower than the reference value, the power generating device 20, the second to output power suppression output value of the above high potential output value than (P _a) (P _Max) Generate a control signal. Then, the output unit 130 transmits the second control signal generated by the control unit 120 to the PCS 22 for the power generation device 20 via the communication interface 106. PCS22 for power generation apparatus 20 in accordance with a second control signal outputted from the output unit 130 to output can output values of power _{(P Max)} from the power generator 20.

As a result, when the frequency of the system 40 is low (in other words, the demand for electric power in the system 40 is excessive), the electric power output from the power generation device 20 can be increased. Therefore, the balance between supply and demand of electric power in the system 40 is improved, and the effect of stabilizing the frequency of the system 40 can be obtained.

Further, the control unit 120 generates a first control signal for stopping the operation (charging operation) of the power storage device 30. Then, the output unit 130 transmits the first control signal generated by the control unit 120 to the PCS 32 for the power storage device 30 via the communication interface 106. The PCS 32 for the power storage device 30 stops the charging operation of the power storage device 30 according to the first control signal output from the output unit 130.

Thereby, when the frequency of the system 40 is low (in other words, the power demand is excessive in the system 40), the power demand can be reduced. Therefore, the balance between supply and demand of electric power in the system 40 is improved, and the effect of stabilizing the frequency of the system 40 can be obtained.

In this operation example, the operation of the power storage device 30 is switched between the charging state and the stopped state. That is, there is no switching from the charged state to the discharged state. Since it takes a certain amount of time to switch the power storage device 30 from the charged state to the discharged state, the control system 1000 can be adjusted to the frequency fluctuation of the system 40 by adopting the control that does not switch between the charged state and the discharged state. It can be made to follow with high accuracy.

Further, in the present invention, since the power generation device 20 and the power storage device 30 cooperate with each other, it is possible to compensate for each other's weaknesses and obtain a more accurate frequency stabilization effect. For example, since the power generation device 20 cannot consume electric power, when the output of the power generation device 20 is reduced to 0, it cannot contribute to the frequency stabilization operation in the forward flow direction any more. On the other hand, when the power storage device 30 performs the charging operation, the weak point of the power generation device 20 can be supplemented, and the effect of frequency stabilization can be obtained more accurately. Further, for example, since the operating time of the power storage device 30 is limited by the capacity, when the capacity is exhausted, the power storage device 30 cannot contribute to the operation of frequency stabilization in the reverse power flow direction any more. On the other hand, when the power generation device 20 generates electric power, the weak point of the power storage device 30 can be supplemented, and the effect of frequency stabilization can be obtained more accurately.

Further, when the power generation device 20 is a solar power generation device, the output power is fixed at substantially 0 after sunset or the like, so that the power generation device 20 cannot contribute to the frequency stabilization operation. When both the power generation device 20 and the power storage device 30 are provided as in the present invention, the frequency stabilization operation is mainly performed by the power of the power generation device 20 during the daytime to preserve the power of the power storage device 30 and at night. If the frequency stabilization operation is executed by the electric power of the power storage device 30, the frequency stabilization effect can be obtained for a longer period of time.

In the above example, when the acquired frequency and the predetermined reference value are equal to each other, the control device 10 may maintain the operating state up to that point, for example. Further, a predetermined hysteresis width may be provided with respect to a predetermined reference value.

<< Specific Example 2 >>
As another example, the power storage device 30 may be switched between the discharged state and the stopped state. FIG. 6 is a diagram for specifically explaining the first operation example. FIG. 6 shows changes in the frequency of the system 40, the output of the power generation device 20, and the output of the power storage device 30.

In the example of FIG. 6, the period up to time _{t 1,} the period of time _{t 3} from the time _{t 2, the} period of time _{t 5} from time _{t 4,} and, at time _{t 6} after the period, the frequency of the system 40 is in a predetermined It exceeds the standard value (50 Hz here). Then, to approximate the frequency of the system 40 to a predetermined reference value, the output of the generator 20 is limited to suppress the output value (P _a), operation of the power storage device 30 (discharge operation) is stopped.

Further, in the example of FIG. 6, the frequency of the system 40 is a predetermined reference value in _{the period from time t 1} to time t ₂ , the period from time t ₃ to time t ₄ , and the period from time t _{5 to time t 6.} Below. Then, to approximate the frequency of the system 40 to a predetermined reference value, with up to output suppression output value of the power generation device 20 can output value from _{(P a) (P Max)} , the discharging operation of power storage device 30 is executed .. Hereinafter, the operation of the control device 10 in the example of FIG. 6 will be described in more detail.

The control unit 120, the frequency of the frequency information is higher than a reference value, generates a second control signal to suppress the output of the generator 20 to suppress the output value (P _a). Then, the output unit 130 transmits the second control signal generated by the control unit 120 to the PCS 22 for the power generation device 20 via the communication interface 106. PCS22 for power generation apparatus 20 in accordance with a second control signal outputted from the output unit 130 limits the output by power from the power generator 20 second suppression output value control signal shown in (P _a).

As a result, when the frequency of the system 40 is high (in other words, the power supply in the system 40 is excessive), the power output from the power generation device 20 is suppressed, so that the power supply to the system 40 is reduced. To do. Therefore, the balance between supply and demand of electric power in the system 40 is improved, and the effect of stabilizing the frequency of the system 40 can be obtained.

Further, the control unit 120 generates a first control signal for stopping the operation (discharge operation) of the power storage device 30. Then, the output unit 130 transmits the first control signal generated by the control unit 120 to the PCS 32 for the power storage device 30 via the communication interface 106. The PCS 32 for the power storage device 30 stops the discharge operation of the power storage device 30 according to the first control signal output from the output unit 130.

By stopping the discharge operation of the power storage device 30, the power supply is reduced. Therefore, the balance between supply and demand of electric power in the system 40 is improved, and the effect of stabilizing the frequency of the system 40 can be obtained. Further, by stopping the discharge operation of the power storage device 30, the power of the load (electronic equipment owned by the consumer, etc.) previously covered by the power storage device 30 is supplied from the system 40. Therefore, the effect of consuming the power of the system 40 and lowering the frequency of the system 40 can be obtained. Further, when the output power from the power generation device 20 exceeds the load of the consumer, the power is not supplied from the system 40, but the relative power supply is reduced, so that the frequency increase rate of the system 40 is increased. The effect of reducing the power is obtained.

Further, when the frequency of the frequency information is lower than the reference value, a second control signal for outputting the electric power of the _{possible output value (PMax) is generated from the power generation device 20.} Then, the output unit 130 transmits the second control signal generated by the control unit 120 to the PCS 22 for the power generation device 20 via the communication interface 106. PCS22 for power generation apparatus 20 in accordance with a second control signal outputted from the output unit 130 to output can output values of power _{(P Max)} from the power generator 20.

As a result, when the frequency of the system 40 is low (in other words, the demand for electric power in the system 40 is excessive), the electric power output from the power generation device 20 can be increased. Therefore, the balance between supply and demand of electric power in the system 40 is improved, and the effect of stabilizing the frequency of the system 40 can be obtained.

Further, the control unit 120 generates a first control signal for causing the power storage device 30 to execute the discharge operation. The control unit 120 generates a first control signal for discharging the power storage device 30 at an arbitrary output of the power storage device 30. The control unit 120 uses, for example, a function for calculating the output at the time of discharge using the state of the power storage device 30 (SOC (State of Charge), SOH (State of Health), battery temperature, battery usage period, etc.) as parameters. Therefore, the discharge output of the power storage device 30 can be determined. Then, the output unit 130 transmits the first control signal generated by the control unit 120 to the PCS 32 for the power storage device 30 via the communication interface 106. The PCS 32 for the power storage device 30 causes the power storage device 30 to perform a discharge operation according to the first control signal output from the output unit 130.

As a result, when the frequency of the system 40 is low (in other words, the demand for electric power is excessive in the system 40), the power supply source increases. Therefore, the balance between supply and demand of electric power in the system 40 is improved, and the effect of stabilizing the frequency of the system 40 can be obtained.

Even with such a configuration, since there is no switching from the charged state to the discharged state, the control system 1000 can be made to accurately follow the fluctuation of the frequency of the system 40 as in the first embodiment.

Further, when the frequency of the system 40 is lower than the reference value, the control unit 120 may operate as follows.

First, the control unit 120 sets the frequency of the system 40 as a reference value by multiplying the difference between the frequency of the system 40 and the reference value by a predetermined coefficient (for example, a numerical value indicating the power required to raise the frequency by 1 Hz). Calculate the target output value (unit [W]) to approach. Next, the control unit 120 _{acquires the possible output value (P MAX} : unit [W]) of the power generation device 20 via, for example, the PCS 22 for the power generation device 20, and the possible output value (P _MAX ) is the target output. Determine if it is greater than or equal to the value.

When the possible output value ( _PMAX ) of the power generation device 20 is equal to or higher than the target output value, the control unit 120 generates a second control signal with the output of the power generation device 20 as the target output value. The output unit 130 transmits the second control signal generated by the control unit 120 to the PCS 22 for the power generation device 20 via the communication interface 106. The PCS 22 for the power generation device 20 causes the power generation device 20 to output the electric power of the target output value according to the second control signal output from the output unit 130.

When the possible output value (P _MAX ) of the power generation device 20 is less than the target output value, the control unit 120 generates a second control signal that _{sets the output of the power generation device 20 as the possible output value (P MAX).} The output unit 130 transmits the second control signal generated by the control unit 120 to the PCS 22 for the power generation device 20 via the communication interface 106. PCS22 for power generation apparatus 20 in accordance with a second control signal outputted from the output unit 130 to output can output values of power _{(P MAX)} from the power generator 20.

Further, when the possible output value ( _PMAX ) of the power generation device 20 is less than the target output value, the control unit 120 acquires the discharge performance of the power storage device 30 (discharge capacity per unit time: unit [W]). It is determined whether or not the discharge performance of the power storage device 30 is equal to or greater than the difference value between the _{target output value and the possible output value (PMAX).} The discharge performance of the power storage device 30 is stored in advance in, for example, the memory 103 or the storage 104 of the control device 10.

When the discharge performance of the power storage device 30 _{is equal to or greater than the difference value between the target output value and the possible output value (PMAX} ), the control unit 120 generates a first control signal using the discharge output of the power storage device 30 as the difference value. To do. The output unit 130 transmits the first control signal generated by the control unit 120 to the PCS 32 for the power storage device 30 via the communication interface 106. PCS32 the electric storage device 30 in accordance with a first control signal output from the output unit 130, to discharge the power storage device 30 by the power of the difference value between the possible output value of the target output value and the power generation device 20 (P _MAX).

Further, when the discharge performance of the power storage device 30 _{is less than the difference value between the target output value and the possible output value (PMAX} ), the control unit 120 causes the power storage device 30 to execute the discharge operation at the upper limit value of the discharge performance. 1 Generate a control signal. The output unit 130 transmits the first control signal generated by the control unit 120 to the PCS 32 for the power storage device 30 via the communication interface 106. The PCS 32 for the power storage device 30 discharges the power storage device 30 at the upper limit of the discharge performance according to the first control signal output from the output unit 130.

Even with such control, the frequency of the system 40 can be brought close to the reference value to stabilize the electric power.

<Second operation example>
In this operation example, the control unit 120 controls the charge / discharge operation of the power storage device 30 when the absolute value of the difference between the frequency of the system 40 and the predetermined reference value exceeds a predetermined threshold value (first threshold value). The first control signal to be generated is generated. That is, in this operation example, when the frequency of the system 40 is out of the range of "predetermined reference value-first threshold value" to "predetermined reference value + first threshold value", the control unit 120 charges the power storage device 30. A first control signal for controlling the discharge operation is generated.

Further, the control unit 120 controls the output of the power generation device 20 when the absolute value of the difference between the frequency of the system 40 and the predetermined reference value exceeds a predetermined threshold value (second threshold value). To generate. That is, in this operation example, when the frequency of the system 40 is out of the range of "predetermined reference value-second threshold value" to "predetermined reference value + second threshold value", the control unit 120 of the power generation device 20 A second control signal that controls the output is generated.

Here, the second threshold value is defined as a value smaller than the first threshold value (first threshold value> second threshold value ≥ 0 Hz). As a result, in this operation example, as the difference between the frequency of the system 40 and the predetermined reference value increases, the difference exceeds the second threshold value before the first threshold value. That is, the output of the power generation device 20 is controlled by the second control signal before controlling the charge / discharge operation of the power storage device 30. After that, when the difference between the frequency of the system 40 and the predetermined reference value further increases and exceeds the first threshold value, the charging / discharging operation of the power storage device 30 is controlled by the first control signal.

A second operation example of the control system 1000 will be described with reference to FIG. 7. Further, FIG. 7 is a flowchart showing a processing flow in the second operation example of the control system 1000. In the following, the predetermined reference value is "50 Hz", the "predetermined reference value + first threshold value" is f _H , the "predetermined reference value-first threshold value" is f _L , and the "predetermined reference value ± second threshold value". Is described as "50 Hz" (that is, the second threshold value = 0 Hz).

First, the frequency of the power supplied from the system 40 is measured by the CT sensor 50, and the information acquisition unit 110 acquires the measured frequency as frequency information (S202).

Then, the control unit 120 determines whether or not the frequency acquired by the information acquisition unit 110 _{exceeds f H (S204).} The control unit 120 can read a predetermined reference value and the first threshold value from, for example, the memory 103 or the storage 104, and calculate _{f H using the read information.} It is to be noted that the memory 103 or storage 104, the "predetermined reference value + the first threshold" (i.e., f _H) may be stored. In this case, the control unit 120 reads out the _{f H} stored in the memory 103 or storage 104, compared to the frequency of the system 40 acquired by the information acquisition unit 110.

When the frequency acquired by the information acquisition unit 110 _{exceeds f H} (S204: YES), the frequency of the system 40 is such that the control unit 120 causes the power storage device 30 to execute the charging operation and the first control signal and power generation. A second control signal that suppresses the output of the device 20 to a suppressed output value is generated (S210). Then, the output unit 130 outputs the generated first control signal and second control signal to the PCS 32 for the power storage device 30 and the PCS 22 for the power generation device 20, respectively (S218). The PCS 32 for the power storage device 30 causes the power storage device 30 to execute a charging operation according to the first control signal output from the output unit 130. Further, the output unit 130 outputs the generated second control signal to the PCS 22 for the power generation device 20. The PCS 22 for the power generation device 20 causes the power generation device 20 to output electric power corresponding to the suppressed output value according to the second control signal output from the output unit 130.

On the other hand, when the frequency acquired by the information acquisition unit 110 is f _H or less (S204: NO), the control unit 120 determines whether or not the frequency acquired by the information acquisition unit 110 is larger than a predetermined reference value. (S206). In this operation example, the second threshold value is 0 Hz. Therefore, in S206, it can be said that the control unit 120 compares the frequency acquired by the information acquisition unit 110 with the “predetermined reference value ± second threshold value”. The control unit 120 reads a predetermined reference value and a second threshold value from, for example, the memory 103 or the storage 104, and uses the read information to compare with the frequency acquired in S202 (hereinafter, comparison). (Also written as a value) can be calculated. The comparison value itself may be stored in the memory 103 or the storage 104. In this case, the control unit 120 reads out the comparison value stored in the memory 103 or the storage 104 and compares it with the frequency of the system 40 acquired by the information acquisition unit 110.

When the frequency acquired by the information acquisition unit 110 is larger than the predetermined reference value (S206: YES), the control unit 120 suppresses the first control signal for stopping the operation of the power storage device 30 and the output of the power generation device 20. A second control signal that is suppressed to a value is generated (S212). Then, the output unit 130 outputs the generated first control signal and second control signal to the PCS 32 for the power storage device 30 and the PCS 22 for the power generation device 20, respectively (S218). The PCS 32 for the power storage device 30 stops the operation of the power storage device 30 according to the first control signal output from the output unit 130. Further, the PCS 22 for the power generation device 20 causes the power generation device 20 to output electric power corresponding to the suppressed output value according to the second control signal output from the output unit 130.

On the other hand, when the frequency acquired by the information acquisition unit 110 is smaller than the predetermined reference value (S206: NO), the control unit 120 determines whether or not _{the frequency acquired by the information acquisition unit 110 is larger than f L.} (S208). The control unit 120 can read a predetermined reference value and the first threshold value from, for example, the memory 103 or the storage 104, and calculate _{f L using the read information.} The memory 103 and the storage 104 may store a "predetermined reference value-first threshold value" (that is, f _L ). _{In this case, the control unit 120 reads the f L} stored in the memory 103 or the storage 104 and compares it with the frequency of the system 40 acquired by the information acquisition unit 110.

When the frequency acquired by the information acquisition unit 110 is _{larger than f L} (S208: YES), the control unit 120 sets the first control signal for stopping the operation of the power storage device 30 and the output of the power generation device 20 as possible output values. A second control signal is generated (S214). Then, the output unit 130 outputs the generated first control signal and second control signal to the PCS 32 for the power storage device 30 and the PCS 22 for the power generation device 20, respectively (S218). The PCS 32 for the power storage device 30 stops the operation of the power storage device 30 according to the first control signal output from the output unit 130. Further, the PCS 22 for the power generation device 20 outputs the electric power corresponding to the possible output value from the power generation device 20 according to the second control signal output from the output unit 130.

On the other hand, when the frequency acquired by the information acquisition unit 110 is f _L or less (S208: NO), the control unit 120 can output the first control signal for causing the power storage device 30 to execute the discharge operation and the output of the power generation device 20. A second control signal as an output value is generated (S216). Then, the output unit 130 outputs the generated first control signal and second control signal to the PCS 32 for the power storage device 30 and the PCS 22 for the power generation device 20, respectively (S218). The PCS 32 for the power storage device 30 causes the power storage device 30 to perform a discharge operation according to the first control signal output from the output unit 130. Further, the PCS 22 for the power generation device 20 outputs the electric power corresponding to the possible output value from the power generation device 20 according to the second control signal output from the output unit 130.

<< Specific example >>
FIG. 8 is a diagram for specifically explaining the second operation example. FIG. 8 shows changes in the frequency of the system 40, the output of the power generation device 20, and the output of the power storage device 30.

In the example of FIG. 8, the period until time _{t 1, the} period of time _{t 6} from the time _{t 3,} the period of time _{t 10} from the time _{t 7,} and, at time _{t 13} after the time period, the frequency of the system 40 is in a predetermined It exceeds the standard value (50 Hz here). That is, in these periods, the absolute value of the difference between the frequency of the system 40 and the predetermined reference value exceeds the second threshold value (= 0). Then, in order to bring the frequency of the system 40 closer to a predetermined reference value, the output of the power generation device 20 is limited to the suppressed output value (here, 0).

In the example of FIG. 8, the period of time _{t 5} from time _{t 4,} the period of time _{t 9} from time _{t 8,} and, at time _{t 14} after the time period, the frequency of the system 40 is above _{f H.} That is, in these periods, the absolute value of the difference between the frequency of the system 40 and the predetermined reference value exceeds the first threshold value. Then, in order to bring the frequency of the system 40 closer to a predetermined reference value, the charging operation of the power storage device 30 is executed.

Further, in the example of FIG. 8, the frequency of the system 40 is a predetermined reference value in _{the period from time t 2} to time t ₃ , the period from time t ₆ to time t ₇ , and the period from time t _{10 to time t 13.} It is below (50 Hz here). That is, in these periods, the absolute value of the difference between the frequency of the system 40 and the predetermined reference value exceeds the second threshold value (= 0). Then, in order to bring the frequency of the system 40 closer to a predetermined reference value, the output of the power generation device 20 _{increases from the suppressed output value (0) to the possible output value (P Max} ).

In the example of FIG. 8, in the period of time _{t 12} from the time _{t 11,} the frequency of the system 40 is below _{f L.} That is, in this period, the absolute value of the difference between the frequency of the system 40 and the predetermined reference value exceeds the first threshold value. Then, in order to bring the frequency of the system 40 closer to a predetermined reference value, the discharge operation of the power storage device 30 is executed.

As described above, in this specific example, the control unit 120 controls the output of the power generation device 20 by the second control signal, and the absolute value of the difference between the frequency of the system 40 and the reference value sets the first threshold value. When it exceeds, the charging operation or the discharging operation of the power storage device 30 is controlled. Further, "the absolute value of the difference between the frequency of the system 40 and the reference value exceeds the first threshold value" means that in this specific example, the frequency of the system 40 _{exceeds f H} and the frequency of the system 40 exceeds f _L. It is a case of exceeding. The control unit 120 controls the charging operation of the power storage device 30 in the former case, and controls the discharging operation of the power storage device 30 in the latter case.

By doing so, it is possible to create a time zone in which the power storage device 30 does not charge or discharge while switching between the charging operation and the discharging operation. As a result, even if it takes a certain amount of time to switch between the charging operation and the discharging operation, the power storage device 30 can sufficiently follow the fluctuation of the system 40 in the time zone. Specifically, the time zone in which the frequency of the system 40 is _{a value between f L} and f _H is a time zone in which the power storage device 30 is neither charged nor discharged. By providing such a time zone, even if it takes time to switch between the charging operation and the discharging operation, the operation of the power storage device 30 can be made to follow the fluctuation of the frequency. Further, in _{a time zone in which the frequency is a value between f L} and f _H , the output of the power generation device 20 is controlled according to the fluctuation of the frequency of the system 40. As a result, the power generation device 20 can contribute to the ancillary operation during the time period when the power storage device 30 cannot contribute to the ancillary operation. Therefore, it is possible to accurately follow the fluctuation of the frequency of the system 40.

Further, if the frequency of the system 40 is significantly deviated from the reference value, a power failure or the like may occur. In such a case, it is desired to stabilize the frequency of the system 40 as soon as possible. In this operation example, when the difference between the frequency of the system 40 and the predetermined reference value reaches the first threshold value larger than the second threshold value, both the power generation device 20 and the power storage device 30 refer to the frequency of the system 40. A strong correction can be applied in the direction of returning to the value.

Further, since the power storage device 30 is less affected by changes in the surrounding environment (for example, weather) than the power generation device 20, the reliability of operation is higher than that of the power generation device 20. Then, in a state where the frequency deviates greatly from the reference value, the need for measures to stabilize the frequency of the system 40 increases. In such a situation, the reliability of the frequency stabilizing effect can be improved by performing the stabilizing operation of the system 40 by the power storage device 30.

<Third operation example>
A third operation example of the control system 1000 will be described with reference to FIG. FIG. 9 is a flowchart showing a processing flow in the third operation example of the control system 1000. In the following, a case where the power storage device 30 mainly operates and the power generation device 20 operates auxiliary to the ancillary command will be illustrated. The operation described here is an operation when an ancillary command in the reverse power flow direction is received.

First, the information acquisition unit 110 acquires the state information of the power storage device 30 in response to the acquisition of the ancillary command transmitted from a terminal such as a general electric power company (S302). Here, the information acquisition unit 110 will be described as acquiring the remaining capacity of the power storage device 30 as state information (S304). However, the state information of the power storage device 30 acquired by the information acquisition unit 110 is not limited to the remaining capacity. For example, the information acquisition unit 110 may acquire the voltage between the terminals of the power storage device 30 as the state information of the power storage device 30.

Next, the control unit 120 determines whether or not the remaining capacity of the power storage device 30 acquired by the information acquisition unit 110 satisfies a predetermined condition (S306). The predetermined conditions are, for example, "whether or not the remaining capacity of the power storage device 30 has reached the capacity in the fully discharged state or the predetermined reference capacity for stopping the discharge", or "whether or not the power storage device 30 is being charged". "And so on. However, the predetermined condition is not limited to these examples as long as it is a condition for determining whether or not the power storage device 30 can be used at the time of executing the ancillary.

When the remaining capacity of the power storage device 30 does not satisfy the predetermined condition (S306: NO), the power storage device 30 is in a usable (dischargeable) state when the ancillary is executed. Therefore, the control unit 120 determines to execute the ancillary operation using the power storage device 30, and generates a first control signal for outputting the electric power required by the ancillary command from the power storage device 30 (S308). At this time, when the power storage device 30 covers the power required for the load (various electronic devices, etc.) possessed by the consumer, the control unit 120 adds the power required for the load and the power required by the ancillary directive. Is generated from the power storage device 30 to generate a first control signal. Then, the output unit 130 outputs the first control signal generated by the control unit 120 to the PCS 32 for the power storage device 30 (S310). Then, the PCS 32 for the power storage device 30 controls the discharge operation of the power storage device 30 according to the first control signal output from the output unit 130.

On the other hand, when the remaining capacity of the power storage device 30 satisfies a predetermined condition (S306: YES), the power storage device 30 cannot output sufficient power when the ancillary is executed. Therefore, the control unit 120 decides to execute the ancillary operation by using the power generation device 20 instead of the power storage device 30, and generates a second control signal for increasing the output of the power generation device 20 (S312). Then, the output unit 130 outputs the generated second control signal to the PCS 22 for the power generation device 20 (S314). The PCS 22 for the power generation device 20 raises the output of the power generation device 20 according to the second control signal output from the output unit 130. That is, the PCS 22 for the power generation device 20 controls the power generation device 20 so that the power generation device 20 outputs the electric power required by the ancillary command instead of the power storage device 30.

As a result, even when the remaining capacity of the power storage device 30 is insufficient, the power generation device 20 can respond to the ancillary command.

The above-mentioned ancillary operation is continuously executed until the period specified by the ancillary directive elapses. The control device 10 can determine whether or not the period specified by the ancillary command has elapsed by using, for example, the time set in the control device 10 or the timer function.

<Specific example>
FIG. 10 is a diagram for specifically explaining a third operation example. FIG. 10 shows changes in the electric power required by the ancillary command, the output and SOC of the power storage device 30, and the output of the power generation device 20.

In the example of FIG. 10, the period up to time t _1, and, at time t ₃ after the period, ancillary commands reverse power flow direction is transmitted. In the period up to time t _1, since the capacity of the power storage device 30 is sufficiently left, the control unit 120 generates a first control signal for outputting the power required by the ancillary command to the power storage device 30. Then, the output unit 130 transmits the first control signal generated by the control unit 120 to the PCS 32 for the power storage device 30. The PCS 32 for the power storage device 30 causes the power storage device 30 to output the power required by the ancillary command in addition to the power consumed by another load (hatched portion in the figure) according to the received first control signal.

And because the ancillary command in the reverse flow direction at time t ₁ is terminated, the control unit 120 generates a first control signal for stopping the output of the power required by the ancillary command, the output unit 130 the first control signal It is transmitted to the PCS 32 for the power storage device 30.

Thereafter, by continuing to output the power required for the load, the capacity of the power storage device 30 is exhausted at time t _2. Then, the power storage device 30 starts the charging operation from the time t _2. In this case, the load in the consumer's house and the charging operation of the power storage device 30 cause a power demand in the forward current direction from the system 40 to the customer's house. On the other hand, according to the ancillary command of FIG. 10, _{it is necessary to control the period from time t 2} to time t ₃ so that neither the power in the forward power flow direction nor the power in the reverse power flow direction is generated. Therefore, the control unit 120 generates a second control signal for outputting the power consumed by the load in the consumer's house and the power required for charging the power storage device 30 (hatched portion in the figure) from the power generation device 20. .. Then, the output unit 130 transmits the second control signal generated by the control unit 120 to the PCS 22 for the power generation device 20. The PCS 22 for the power generation device 20 controls the output of the power generation device 20 according to the received second control signal.

Then, although ancillary commands reverse flow direction is transmitted at time t _3, power storage device 30 is being charged, it does not remain enough power. In this case, the control unit 120 generates a second control signal that causes the power generation device 20 to further output the electric power required by the ancillary command. In the example of FIG. 10, the control unit 120 has the power consumed by the load in the consumer's house, the power required to charge the power storage device 30 (hatched portion in the figure), and the power required by the ancillary command. Is generated from the power generation device 20 to generate a second control signal. Then, the output unit 130 transmits the second control signal generated by the control unit 120 to the PCS 22 for the power generation device 20. The PCS 22 for the power generation device 20 outputs the electric power required by the ancillary command from the power generation device 20 according to the received second control signal. In this way, when the power storage device 30 cannot respond to the ancillary command, the power generation device 20 operates instead and responds to the ancillary command.

Not limited to the above example, when the output of the power generation device 20 is stable (for example, in a sunny time zone by solar power generation), the power generation device 20 is mainly used to supplement the power storage device 30. It may be used for. In this case, the control unit 120 determines the power generation device when the output of the power generation device 20 decreases (for example, when the output value of the power generation device 20 continues to be equal to or less than the power value required by the ancillary command for a predetermined time). A control signal (first control signal, second control signal) for operating the power storage device 30 can be generated instead of the 20.

Further, when the information acquisition unit 110 acquires the ancillary command in the forward tide direction, the control unit 120 can operate as follows in the flowchart of FIG.

The control unit 120 determines whether or not a predetermined condition is satisfied (for example, "whether or not the capacity of the power storage device 30 has reached the capacity at the time of full charge or a predetermined reference capacity for stopping charging"). When the capacity of the power storage device 30 does not satisfy the predetermined condition (S304: NO), the power storage device 30 can be used (chargeable) in the ancillary operation. Therefore, the control unit 120 determines to execute the ancillary operation using the power storage device 30, and generates a first control signal for charging the power storage device 30 with the electric power required by the ancillary command (S308). Then, the output unit 130 outputs the first control signal generated by the control unit 120 to the PCS 32 for the power storage device 30 (S310). Then, the PCS 32 for the power storage device 30 controls the charging operation of the power storage device 30 according to the first control signal output from the output unit 130.

On the other hand, when the capacity of the power storage device 30 satisfies a predetermined condition (S306: YES), the power storage device 30 cannot be sufficiently charged when the ancillary is executed. In this case, the control unit 120 determines to execute the ancillary operation by using the power generation device 20 instead of the power storage device 30, and generates a second control signal that limits the output of the power generation device 20 to the suppression output value ( S312). Then, the output unit 130 outputs the generated second control signal to the PCS 22 for the power generation device 20 (S314). The PCS 22 for the power generation device 20 reduces the output of the power generation device 20 according to the second control signal output from the output unit 130. Specifically, the PCS 22 for the power generation device 20 makes the output of the power generation device 20 smaller than the load on the consumer side. The electric power reduced by reducing the output of the power generation device 20 is supplied from the system 40.

In this way, even when the power storage device 30 is close to a fully charged state and cannot be charged, the power generation device 20 operates instead, so that it is possible to respond to the ancillary command in the forward current direction.

[Third Embodiment]
FIG. 11 is a block diagram conceptually showing the functional configuration of the control device 10 of the third embodiment. It includes an acquisition unit 140 and a determination unit 150.

As shown in FIG. 11, the control device 10 of the present embodiment includes an acquisition unit 140 that acquires state information indicating the state of the power storage device 30. The acquisition unit 140 acquires, for example, information indicating a deterioration state of the output of the power storage device 30 (for example, SOH (State of Health) of the power storage device 30). Further, the control device 10 includes a determination unit 150 that determines the output width of the electric power output from the power generation device 20 in an ancillary manner based on the state information of the power storage device 30 acquired by the acquisition unit 140. Specifically, the determination unit 150 determines the degree of deterioration of the power storage device 30 based on the information indicating the deterioration state of the power storage device 30. The higher the degree of deterioration of the power storage device 30, the larger the output width of the electric power output from the power generation device 20 in response to ancillary.

[Hardware configuration]
The control device 10 of the present embodiment has the same hardware configuration as that of FIG. The storage 104 of the present embodiment stores a program module for realizing each of the above-mentioned processing units (acquisition unit 140, determination unit 150). When the processor 102 executes these program modules, the functions of the acquisition unit 140 and the determination unit 150 described above are realized.

[Operation example]
The operation of the control device 10 of the third embodiment will be described with reference to FIG. FIG. 12 is a flowchart showing a processing flow of the control device 10 of the third embodiment.

First, the acquisition unit 140 acquires the SOH of the power storage device 30 as the state information of the power storage device 30 (S402). Then, the determination unit 150 sets the output upper limit value of the power generation device 20 based on the acquired SOH (S404). The determination unit 150 can calculate the output upper limit value according to the SOH by using, for example, a function for calculating the output upper limit value using the SOH as a parameter. The calculated output upper limit value is set to a larger value as the SOH is smaller (that is, the degree of deterioration is larger).

The operation of the control device 10 of the third embodiment will be specifically described with reference to FIGS. 13 to 16. 13 to 16 are diagrams for explaining an example of the operation of the control device 10 of the third embodiment.

FIG. 13A shows an example of the breakdown of the discharge amount of the power storage device 30 and the power generation amount of the power generation device 20 when the degree of deterioration of the power storage device 30 is small. Further, FIG. 13B shows an example of the breakdown of the discharge amount of the power storage device 30 and the power generation amount of the power generation device 20 when the degree of deterioration of the power storage device 30 is large. Specifically, when the degree of deterioration of the power storage device 30 is small, the power generation device 20 consumes all the power consumed by the power storage device 30 in the ancillary operation in addition to the power consumed by the load in the consumer's house (household power consumption). I'm paying. Further, the power generation device 20 covers only the power consumption in the house. Then, as shown in FIG. 13B, when the power storage device 30 deteriorates (when the SOH deteriorates) and the maximum discharge amount of the power storage device 30 deteriorates, the control device 10 causes the power storage device 10 to operate in an ancillary manner. Reduce the power output from 30. Further, the control device 10 controls the power generation device 20 to output the electric power for ancillary operation (hatched portion in the figure) that is insufficient by reducing the output of the power storage device 30.

In the example of FIG. 13A, how the output of the power storage device 30 and the output of the power generation device 20 change when the degree of deterioration of the power storage device 30 is small is shown in FIG. All the output (P _Max : possible output value) of the power generation device 20 is used for home consumption. Then, when an ancillary operation is required, the power storage device 30 responds to the request by performing a discharge operation. Specifically, the period in which the frequency of the system 40 falls below a predetermined reference value and the ancillary operation is required (the period from time t _{1 to time t 2} , the period from time t ₃ to time t ₄ and the time t _5). a period of time t ₆₎ from the discharge operation of power storage device 30 is executed. The sum of the rectangular areas in the figure indicates the amount of power consumed in the ancillary operation by the power storage device 30.

After that, as the deterioration of the power storage device 30 progresses, the output of the power storage device 30 and the output of the power generation device 20 change as shown in FIG. 15, for example, under the control of the control device 10. In the example of FIG. 15, the output of the power generator 20 is lower than the possible output values _{P Max,} is limited to suppress the output value _{P a.} The frequency of the system 40 is below a predetermined reference value, the period of time t ₂ from time (time t ₁ the ancillary operation is required, the period of time t ₄ from time t _3, and, from time t ₅ t _In the period of 6), the control device 10 outputs the power for the ancillary operation from the power storage device 30. Here, the control device 10 reduces the output of the power storage device 30 to about half of the case where the degree of deterioration is small. Instead, during the period when the ancillary operation is required, the control device 10 raises _{the output of the power generation device 20 to the possible output value P Max.} As a result, the decrease in the output of the power storage device 30 can be supplemented by the increase in the output of the power generation device 20, and the amount of electric power required for the ancillary operation can be secured.

Further, by changing the threshold value for performing the discharge operation of the power storage device 30, it is possible to reduce the number of the power storage device 30 for the ancillary operation. This operation will be described with reference to FIG. In the example of FIG. 16, the control device 10 changes the threshold value to perform the discharge operation of power storage device 30, a reference value from the (50 Hz) to a smaller _{f th} than 50 Hz. In this case, the power storage device 30 will perform an ancillary operation with a period of time t _b from the time t _a. Therefore, the output from the power storage device 30 can be reduced to about half as compared with the electric energy of the power storage device 30 (the total area indicated by the dotted line in the figure) when the threshold value is not changed. Again, the control device 10, by increasing the possible output values P _Max output of the generator 20 from inhibiting the output value P _a, compensate for the output decrease of the power storage device 30 at the output increment of the generator 20.

Note that FIGS. 13 to 16 are merely examples, and the present invention is not limited to the examples shown in these figures. For example, the threshold value of the power storage device 30 and the power generation device 20 that perform the ancillary operation, and the output fluctuation range of the power generation device 20 and the power storage device 30 can be appropriately selected according to the frequency fluctuation range and the ancillary command. Is. Further, the example of FIG. 15 and the example of FIG. 16 may be combined so that the control device 10 controls both the output of the power storage device 30 and the operation threshold value of the power storage device 30.

Although the embodiments of the present invention have been described above with reference to the drawings, these are examples of the present invention, and various configurations other than the above can be adopted.

Further, in the plurality of flowcharts used in the above description, a plurality of steps (processes) are described in order, but the execution order of the steps executed in each embodiment is not limited to the order of description. In each embodiment, the order of the illustrated steps can be changed within a range that does not hinder the contents. In addition, the above-described embodiments can be combined as long as the contents do not conflict with each other.

Hereinafter, an example of the reference form will be added.
1. 1.
An information acquisition means for acquiring frequency information including at least one of the system frequency and the ancillary directive, and
Using the frequency information, a control means for generating a first control signal for a power storage device and a second control signal for a power generation device, and
An output means that transmits the first control signal to the power storage device and outputs the second control signal to the power generation device.
A control device comprising.
2.
The control means determines whether or not the frequency of the system is higher than the reference value, and uses the determination result to control the charging / discharging operation of the power storage device, the first control signal, and the power generation device. Generates the second control signal that controls the output.
1. 1. The control device described in.
3. 3.
The control means
When the frequency of the system is higher than the reference value, the first control signal for causing the power storage device to execute the charging operation and the second control signal for suppressing the output of the power generation device to the suppression output value are generated.
When the frequency of the system is lower than the reference value, the first control signal for stopping the operation of the power storage device and the second control signal for making the output of the power generation device higher than the suppression output value are generated. To do,
2. The control device described in.
4.
The control means
When the frequency of the system is higher than the reference value, the first control signal for stopping the operation of the power storage device and the second control signal for suppressing the output of the power generation device to the suppression output value are generated.
When the frequency of the system is lower than the reference value, the first control signal that causes the power storage device to execute a discharge operation and the second control signal that causes the output of the power generation device to be higher than the suppression output value. Generate,
2. The control device described in.
5.
The control means generates the first control signal for controlling the charge / discharge operation of the power storage device when the absolute value of the difference between the frequency of the system and the reference value exceeds the first threshold value.
1. 1. The control device described in.
6.
The control means transmits the second control signal for controlling the output of the power generation device when the absolute value of the difference between the frequency of the system and the reference value exceeds the second threshold value smaller than the first threshold value. Generate,
5. The control device described in.
7.
When the control means controls the output of the power generation device by the second control signal and the absolute value of the difference between the frequency of the system and the reference value exceeds the first threshold value, the power storage device Controls charging or discharging,
1. 1. The control device described in.
8.
The information acquisition means further acquires the state information of the power storage device, and obtains the state information.
The control means uses the state information and the frequency information of the power storage device to obtain the first control signal for controlling the charging / discharging operation of the power storage device and the second control signal for controlling the output of the power generation device. Generate,
1. 1. The control device described in.
9.
The information acquisition means further acquires information indicating the capacity of the power storage device as the state information.
The control means generates the second control signal for controlling the output of the power generation device when the capacity of the power storage device indicated by the state information satisfies a predetermined condition.
8. The control device described in.
10.
The computer
Acquire frequency information including at least one of the system frequency and ancillary directives,
Using the frequency information, a first control signal for the power storage device and a second control signal for the power generation device are generated.
The first control signal is transmitted to the power storage device, and the second control signal is output to the power generation device.
Control methods including that.
11.
The computer
The first control signal that controls the charge / discharge operation of the power storage device and the output of the power generation device are controlled by determining whether or not the frequency of the system is higher than the reference value and using the determination result. Generate a second control signal,
Including 10. The control method described in.
12.
The computer
When the frequency of the system is higher than the reference value, the first control signal for causing the power storage device to execute the charging operation and the second control signal for suppressing the output of the power generation device to the suppression output value are generated.
When the frequency of the system is lower than the reference value, the first control signal for stopping the operation of the power storage device and the second control signal for making the output of the power generation device higher than the suppression output value are generated. To do,
Including 11. The control method described in.
13.
The computer
When the frequency of the system is higher than the reference value, the first control signal for stopping the operation of the power storage device and the second control signal for suppressing the output of the power generation device to the suppression output value are generated.
When the frequency of the system is lower than the reference value, the first control signal that causes the power storage device to execute a discharge operation and the second control signal that causes the output of the power generation device to be higher than the suppression output value. Generate,
Including 11. The control method described in.
14.
The computer
When the absolute value of the difference between the frequency of the system and the reference value exceeds the first threshold value, the first control signal for controlling the charging / discharging operation of the power storage device is generated.
Including 10. The control method described in.
15.
The computer
When the absolute value of the difference between the frequency of the system and the reference value exceeds the second threshold value smaller than the first threshold value, the second control signal for controlling the output of the power generation device is generated.
Including 14. The control method described in.
16.
The computer
When the output of the power generation device is controlled by the second control signal and the absolute value of the difference between the frequency of the system and the reference value exceeds the first threshold value, the charging operation or discharging operation of the power storage device To control
Including 10. The control method described in.
17.
The computer
Further acquisition of the state information of the power storage device,
Using the state information and the frequency information of the power storage device, the first control signal for controlling the charging / discharging operation of the power storage device and the second control signal for controlling the output of the power generation device are generated.
Including 10. The control method described in.
18.
The computer
Information indicating the capacity of the power storage device is further acquired as the state information, and the information is further acquired.
When the capacity of the power storage device indicated by the state information satisfies a predetermined condition, the second control signal for controlling the output of the power generation device is generated.
Including 17. The control method described in.
19.
Computer,
An information acquisition means for acquiring frequency information including at least one of the system frequency and the ancillary directive, and
Using the frequency information, a control means for generating a first control signal for a power storage device and a second control signal for a power generation device, and
An output means that transmits the first control signal to the power storage device and outputs the second control signal to the power generation device.
A program to function as.
20.
The computer
The first control signal that controls the charge / discharge operation of the power storage device and the output of the power generation device are controlled by determining whether or not the frequency of the system is higher than the reference value and using the determination result. A means for generating a second control signal,
To further function as 19. The program described in.
21.
The computer
When the frequency of the system is higher than the reference value, the first control signal for causing the power storage device to execute the charging operation and the second control signal for suppressing the output of the power generation device to the suppression output value are generated.
When the frequency of the system is lower than the reference value, the first control signal for stopping the operation of the power storage device and the second control signal for making the output of the power generation device higher than the suppression output value are generated. Means to do,
To further function as 20. The program described in.
22.
The computer
When the frequency of the system is higher than the reference value, the first control signal for stopping the operation of the power storage device and the second control signal for suppressing the output of the power generation device to the suppression output value are generated.
When the frequency of the system is lower than the reference value, the first control signal that causes the power storage device to execute a discharge operation and the second control signal that causes the output of the power generation device to be higher than the suppression output value. Means to generate,
To further function as 20. The program described in.
23.
The computer
A means for generating the first control signal for controlling the charge / discharge operation of the power storage device when the absolute value of the difference between the frequency of the system and the reference value exceeds the first threshold value.
To further function as 19. The program described in.
24.
The computer
A means for generating the second control signal for controlling the output of the power generation device when the absolute value of the difference between the frequency of the system and the reference value exceeds the second threshold value smaller than the first threshold value.
To make it function further as 23. The program described in.
25.
The computer
When the output of the power generation device is controlled by the second control signal and the absolute value of the difference between the frequency of the system and the reference value exceeds the first threshold value, the charging operation or discharging operation of the power storage device Means to control,
To further function as 19. The program described in.
26.
The computer further acquires the state information of the power storage device, and obtains the state information.
A means for generating the first control signal for controlling the charge / discharge operation of the power storage device and the second control signal for controlling the output of the power generation device by using the state information and the frequency information of the power storage device.
To further function as 19. The program described in.
27.
The computer
Information indicating the capacity of the power storage device is further acquired as the state information, and the information is further acquired.
A means for generating the second control signal for controlling the output of the power generation device when the capacity of the power storage device indicated by the state information satisfies a predetermined condition.
To further function as 26. The program described in.
28.
An acquisition means for acquiring status information indicating the status of the power storage device, and
Based on the state information of the power storage device, a determination means for determining the output width of the electric power output from the power generation device in an ancillary manner, and
A control device comprising.
29.
The acquisition means acquires SOH (State of Health) information of the power storage device as the state information.
28. The control device described in.
30.
The computer
Acquires status information indicating the status of the power storage device,
Based on the state information of the power storage device, the output width of the power output from the power generation device for ancillary is determined.
Control methods including that.
31.
The computer
Acquires SOH (State of Health) information of the power storage device as the state information.
Including 30. The control method described in.
32.
Computer,
Acquisition means for acquiring status information indicating the status of the power storage device,
A determination means for determining the output width of the electric power output from the power generation device in an ancillary manner based on the state information of the power storage device.
A program to function as.
33.
The computer
A means for acquiring SOH (State of Health) information of the power storage device as the state information.
32. To function as The program described in.

1000 Control system 10 Control device 101 Bus 102 Processor 103 Memory 104 Storage 105 Input / output interface 106 Communication interface 110 Information acquisition unit 120 Control unit 130 Output unit 140 Acquisition unit 150 Decision unit 20 Power generation device 22 PCS
30 Power storage device 32 PCS
40 system 42 power line 50 CT sensor 60 CT sensor

Claims (6)

Information acquisition means for acquiring frequency information indicating the frequency of the system,
Using the frequency information, a control means for generating a first control signal for a power storage device and a second control signal for a power generation device, and
An output means that transmits the first control signal to the power storage device and outputs the second control signal to the power generation device.
With
The control means
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the first threshold value and the difference is a positive value, the first control signal causes the power storage device to execute the charging operation. It generates a control signal,
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the first threshold value and the difference is a negative value, the control signal for causing the power storage device to execute the discharge operation is transmitted to the first threshold value. 1 Generated as a control signal
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the second threshold value smaller than the first threshold value and the difference is a positive value, the output of the power generation device is reduced. A control signal is generated as the second control signal ,
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the second threshold value and the difference is a negative value, the control signal for increasing the output of the power generation device is the first. 2 Generated as a control signal ,
Control device. Information acquisition means for acquiring frequency information indicating the frequency of the system,
Using the frequency information, a control means for generating a first control signal for a power storage device and a second control signal for a power generation device, and
An output means that transmits the first control signal to the power storage device and outputs the second control signal to the power generation device.
With
The control means
Wherein when the frequency information is frequency indicated is controlled to reduce the output of the power generator by the second control signal in response to exceeding the reference value, the absolute value of the difference between the reference value and the frequency There exceeds a first threshold, and if the difference is a positive value, to execute the charging operation to the power storage device by the first control signal,
Absolute difference between the frequency and the reference value when the second control signal is used to control the output of the power generator to increase in response to the frequency indicated by the frequency information falling below the reference value. When the value exceeds the first threshold value and the difference is a negative value, the first control signal causes the power storage device to execute a discharge operation.
Control device. The computer
Acquire frequency information indicating the frequency of the system,
Using the frequency information, a first control signal for the power storage device and a second control signal for the power generation device are generated.
The first control signal is transmitted to the power storage device, and the second control signal is output to the power generation device.
Including that
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the first threshold value and the difference is a positive value, the first control signal causes the power storage device to execute the charging operation. It generates a control signal,
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the first threshold value and the difference is a negative value, the control signal for causing the power storage device to execute the discharge operation is transmitted. Generated as the first control signal
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the second threshold value smaller than the first threshold value and the difference is a positive value, the output of the power generation device is reduced. A control signal is generated as the second control signal ,
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the second threshold value and the difference is a negative value, the control signal for increasing the output of the power generation device is the first. 2 Generated as a control signal ,
Control method. The computer
Acquire frequency information indicating the frequency of the system,
Using the frequency information, a first control signal for the power storage device and a second control signal for the power generation device are generated.
The first control signal is transmitted to the power storage device, and the second control signal is output to the power generation device.
Including that
Wherein when the frequency information is frequency indicated is controlled to reduce the output of the power generator by the second control signal in response to exceeding the reference value, the absolute value of the difference between the reference value and the frequency There exceeds a first threshold, and if the difference is a positive value, to execute the charging operation to the power storage device by the first control signal,
Absolute difference between the frequency and the reference value when the second control signal is used to control the output of the power generator to increase in response to the frequency indicated by the frequency information falling below the reference value. When the value exceeds the first threshold value and the difference is a negative value, the first control signal causes the power storage device to execute a discharge operation.
Control method. Computer,
Information acquisition means for acquiring frequency information indicating the frequency of the system,
It is a means for generating a first control signal for a power storage device and a second control signal for a power generation device by using the frequency information.
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the first threshold value and the difference is a positive value, the first control signal causes the power storage device to execute the charging operation. It generates a control signal,
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the first threshold value and the difference is a negative value, the control signal for causing the power storage device to execute the discharge operation is transmitted. Generated as the first control signal
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the second threshold value smaller than the first threshold value and the difference is a positive value, the output of the power generation device is reduced. generating a control signal as said second control signal,
When the absolute value of the difference between the frequency indicated by the frequency information and the reference value exceeds the second threshold value and the difference is a negative value, the control signal for increasing the output of the power generation device is the first. 2 Generated as a control signal,
Control means and
An output means that transmits the first control signal to the power storage device and outputs the second control signal to the power generation device.
A program to function as. Computer,
Information acquisition means for acquiring frequency information indicating the frequency of the system,
Using the frequency information, a control means for generating a first control signal for a power storage device and a second control signal for a power generation device, and
An output means that transmits the first control signal to the power storage device and outputs the second control signal to the power generation device.
To function as
The control means
Wherein when the frequency information is frequency indicated is controlled to reduce the output of the power generator by the second control signal in response to exceeding the reference value, the absolute value of the difference between the reference value and the frequency There exceeds a first threshold, and if the difference is a positive value, to execute the charging operation to the power storage device by the first control signal,
Absolute difference between the frequency and the reference value when the second control signal is used to control the output of the power generator to increase in response to the frequency indicated by the frequency information falling below the reference value. When the value exceeds the first threshold value and the difference is a negative value, the first control signal causes the power storage device to execute a discharge operation.
program.

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