JP6807550B2 - Power management system, power conversion system, program - Google Patents

Description

The present invention relates to a power management system, a power conversion system, and a program that control input / output to a power system.

Solar cells and storage batteries are connected to the power system via a power converter. For example, the power converter converts the DC power generated by the solar cell into AC power and then outputs it to the power system. The power conversion device is connected to an external server via a remote controller and an EMS (Energy Management System). The EMS receives the output suppression message from the external server and outputs the output suppression message to the remote controller. The remote controller controls the output from the power converter according to the output suppression message (see, for example, Patent Document 1).

International Publication No. 16/136912

In Patent Document 1, a power conversion device is connected to an external server, which is one higher-level system, and the power conversion device exchanges power according to a schedule from the higher-level system and a schedule including an output suppression message. Output power to the power system. Here, the power conversion device may be connected to a plurality of higher-level systems for executing input / output control according to different purposes. In such a configuration, when the schedules received from a plurality of higher-level systems are different, it becomes difficult to know how to control the power conversion device.

The present invention has been made in view of such a situation, and an object of the present invention is to provide a technique for normally executing input / output even when input / output control received from a plurality of higher-level systems is different.

In order to solve the above problems, the power management system of a certain aspect of the present invention is a power management system that controls the input / output of power to and from the power system in the consumer, and the input / output control is performed from the first higher system. The first receiving unit that receives the first schedule of the above, the second receiving unit that receives the second schedule of input / output control from the second upper system different from the first higher system, and the first receiving unit that receives the first schedule. It is the first control command for the time zone in which the content of the input / output control in the first schedule includes the content of the input / output control in the second schedule received by the second receiver, and is in the first schedule. It includes an output unit that outputs a first control command that satisfies the contents of the input / output control and the contents of the input / output control in the second schedule. The output unit is a second control command for a time zone corresponding to the contents of the input / output control in the second schedule outside the range of the contents of the input / output control in the first schedule, and is input in the first schedule. A second control command that deviates from either the content of the output control or the content of the input / output control in the second schedule is output.

Another aspect of the present invention is a power conversion system. This power conversion system includes a power conversion device connected to a power generation device and a power storage device installed in a customer and a power system, and a power management system that controls power input / output on the power system side in the power conversion device. Be prepared. The power management system consists of a first receiver that receives the first schedule of input / output control between the first host system and the power system in the consumer, and a second host system that is different from the first host system. The second receiving unit receives the second receiving unit that receives the second schedule of the input / output control between the power system and the power system, and the second receiving unit receives the input / output control in the range of the contents of the input / output control in the first schedule received by the first receiving unit. It is the first control command for the time zone including the contents of the input / output control in the second schedule, and satisfies the contents of the input / output control in the first schedule and the contents of the input / output control in the second schedule. 1 It is provided with an output unit that outputs a control command. The output unit is a second control command for a time zone corresponding to the contents of the input / output control in the second schedule outside the range of the contents of the input / output control in the first schedule, and is input in the first schedule. A second control command that deviates from either the content of the output control or the content of the input / output control in the second schedule is output.

It should be noted that any combination of the above components and the conversion of the expression of the present invention between a method, a device, a system, a computer program, a recording medium on which a computer program is recorded, or the like is also effective as an aspect of the present invention. is there.

According to the present invention, even when the input / output controls received from a plurality of higher-level systems are different, the input / output can be normally executed.

It is a figure which shows the structure of the power distribution system which concerns on Example 1. FIG. It is a figure which shows another configuration of the power distribution system of FIG. 3 (a)-(c) are diagrams showing an outline of the operation of the power management system server of FIG. It is a flowchart which shows the control procedure by the power management system server of FIG. It is a figure which shows the structure of the power management system server which concerns on Example 2. FIG. It is a flowchart which shows the control procedure by the power management system server of FIG. It is a flowchart which shows another control procedure by the power management system server of FIG.

(Example 1)
Before concretely explaining the examples of the present invention, the findings on which the examples are based will be described. An embodiment relates to a power management system that controls the input / output of power in a creation / storage cooperation system installed in a customer. A consumer is a facility that receives electric power from an electric power company or the like, and is, for example, a house (customer's house), an office, a store, a factory, a park, or the like. In addition, the creation and storage cooperation system is a system that combines a solar cell and a power storage device and connects them to a power system of an electric power company or the like via a power conversion device. For example, the creation and storage cooperation system outputs the electric power generated by the solar cell to the electric power system during the daytime, but does not output the electric power to the electric power system at nighttime. When such a creation and storage cooperation system is installed in a plurality of consumers, the fluctuation of the electric power output from these to the electric power system becomes large. If the power plant of the electric power company cannot keep up with the fluctuation, a large-scale power outage may occur.

In order to suppress the occurrence of a large-scale power outage, a remote output control system is connected to each consumer's power management system via a network. The remote output control system transmits an input / output control schedule that suppresses the output of electric power to each electric power management system during a time period when the amount of power generation of the creation and storage cooperation system is large. Since the power management system controls the output of electric power according to the received schedule, the peak of the electric power output from a plurality of consumers to the electric power system becomes small, and the fluctuation of the electric power becomes small. It can be said that such a remote output control system is a higher-level system for the creation and storage cooperation system.

On the other hand, the power management system may be connected to a higher-level system different from the remote output control system. An example of such a host system is a virtual power plant (hereinafter referred to as "VPP"). The VPP collectively controls small-scale power generation facilities such as scattered small-scale renewable energy power generation devices, storage batteries, and fuel cells, and a network system that manages the demand for electric power. That is, the VPP makes a plurality of small-scale power generation facilities, a network system, etc. function as one power plant. This small-scale power generation facility includes a creation and storage cooperation system. The VPP transmits an input / output control schedule for controlling power sale or purchase to each power management system. The power management system controls the input / output of power so as to sell or buy power according to the received schedule.

When the power management system is connected to both the remote output control system and the VPP, the remote output control system and the VPP are executing separate controls, so the contents of the input / output control included in the schedule received from each are It may be different at the same time. In particular, when one input / output control is not followed and the other input / output control is not followed, the power management system does not know how to control the input / output of power.

FIG. 1 shows the configuration of the power distribution system 100 according to the first embodiment. The power distribution system 100 includes a power generation device 10, a power storage device 12, a power conversion device 14, a distribution board 16, a load 18, a measuring instrument 20, a power system 22, a power management system server 24, a first upper system 26, and a second upper system. Includes 28. The power conversion device 14 includes a first conversion unit 30, a second conversion unit 32, a third conversion unit 34, a first conversion control unit 40, a second conversion control unit 42, and a third conversion control unit 44. The power management system server 24 includes a communication unit 50, a processing unit 52, and an output unit 54, and the communication unit 50 includes a first receiving unit 60 and a second receiving unit 62. Here, the power conversion device 14 and the power management system server 24 are included in the power conversion system 70, and the power generation device 10, the power storage device 12, and the power conversion device 14 are included in the creation and storage cooperation system 72. The power generation device 10, the measuring instrument 20, and the power management system server 24 are installed in the customer. However, a part of the functions of the power management system server 24 may be provided by a server installed outside the customer and connected to the first higher system 26 and the second higher system 28.

The power generation device 10 is a renewable energy power generation device, and here, as an example, a solar cell. Solar cells utilize the photovoltaic effect to directly convert light energy into electricity. As the solar cell, a silicon solar cell, a solar cell made of a compound semiconductor or the like, a dye-sensitized type (organic solar cell), or the like is used. The power generation device 10 is connected to the first conversion unit 30 and outputs the generated DC power to the first conversion unit 30.

The first conversion unit 30 is a DC-DC converter, converts the DC power output from the power generation device 10 into DC power having a desired voltage value, and outputs the converted DC power to the DC bus 110. The DC bus 110 is connected to a third conversion unit 34, which will be described later. The first conversion unit 30 is composed of, for example, a step-up chopper.

The first conversion control unit 40 is connected to the first conversion unit 30 and controls the first conversion unit 30. As a basic control, the first conversion control unit 40 controls the first conversion unit 30 by MPPT (Maximum Power Point Tracking) so that the output power of the power generation device 10 is maximized. Specifically, the first conversion control unit 40 measures the input voltage and input current of the first conversion unit 30, which are the output voltage and output current of the power generation device 10, and estimates the generated power of the power generation device 10. The first conversion control unit 40 generates a command value for setting the generated power of the power generation device 10 to the maximum power point (optimal operating point) based on the measured output voltage of the power generation device 10 and the estimated generated power. .. For example, the operating point voltage is changed by a predetermined step width according to the hill climbing method to search for the maximum power point, and a command value is generated so as to maintain the maximum power point. The first conversion unit 30 performs a switching operation in response to a drive signal based on the generated command value.

The power storage device 12 is a storage battery capable of charging and discharging electric power, and includes a lithium ion storage battery, a nickel hydrogen storage battery, a lead storage battery, an electric double layer capacitor, a lithium ion capacitor, and the like. The power storage device 12 is connected to the second conversion unit 32.

The second conversion unit 32 is a bidirectional converter connected between the power storage device 12 and the DC bus 110 to charge and discharge the power storage device 12. The second conversion control unit 42 is connected to the second conversion unit 32 and controls the second conversion unit 32. As basic control, the second conversion control unit 42 controls the second conversion unit 32 based on a predetermined command value to charge / discharge the power storage device 12 with a constant current (CC) / constant voltage (CV). ..

The third conversion unit 34 is a bidirectional inverter. The third conversion unit 34 converts the DC power input from the DC bus 110 into AC power, and outputs the converted AC power to the distribution line 120. The distribution line 120 is connected to the power system 22 via the distribution board 16 and the measuring instrument 20. Further, the third conversion unit 34 converts the AC power supplied from the power system 22 into DC power, and outputs the converted DC power to the DC bus 110. An electrolytic capacitor (not shown) for smoothing is connected to the DC bus 110.

The third conversion control unit 44 is connected to the third conversion unit 34 and controls the third conversion unit 34. As basic control, the third conversion control unit 44 controls the third conversion unit 34 so that the voltage of the DC bus 110 maintains the first threshold voltage. Specifically, the third conversion control unit 44 detects the voltage of the DC bus 110 and generates a command value for matching the detected bus voltage with the first threshold voltage. The third conversion control unit 44 generates a command value for increasing the duty ratio of the third conversion unit 34 when the voltage of the DC bus 110 is higher than the first threshold voltage, and the voltage of the DC bus 110 is the first. When the voltage is lower than the threshold voltage, a command value for lowering the duty ratio of the third conversion unit 34 is generated. The third conversion unit 34 performs a switching operation in response to a drive signal based on the generated command value.

Here, the first conversion control unit 40 and the third conversion control unit 44 are connected by a communication line 130, and both conform to a predetermined serial communication standard (for example, RS-485 standard, TCP-IP standard). Communication is performed. Further, the second conversion control unit 42 and the third conversion control unit 44 are connected by a communication line 132, and communication conforming to the serial communication standard is also performed between them.

The distribution board 16 is connected to the distribution line 120 and the load 18. The distribution board 16 supplies electric power to the load 18. The load 18 is a device that consumes electric power supplied via the distribution line 120. The load 18 includes equipment such as a refrigerator, an air conditioner, and lighting. Here, one load 18 is connected to the distribution board 16, but a plurality of loads 18 may be connected to the distribution board 16.

The measuring instrument 20 is arranged between the distribution board 16 and the power system 22 on the distribution line 120. The measuring instrument 20 measures the electric power value of the passing electric power. Here, the electric power passing through includes the electric power output from the consumer to the electric power system 22 and the electric power input from the electric power system 22 to the electric power system 22. The former corresponds to selling power and the latter corresponds to buying power. Further, since a known technique may be used for measuring the power value, the description thereof will be omitted here. The measuring instrument 20 outputs the measured power value to the third conversion control unit 44.

The power management system server 24 is a server of the power management system, and is connected to the third conversion control unit 44 and also to the first upper system 26 and the second upper system 28. The power management system server 24 controls the input / output on the power system 22 side of the power conversion device 14, that is, the distribution line 120. As a result, the power management system server 24 controls the input / output of power between the power system 22 and the measuring instrument 20 in the consumer, that is, the input / output of power between the measuring instrument 20 and the power system 22. Before explaining the configurations of the power management system server 24, the first upper system 26, and the second upper system 28, these connections will be described with reference to FIG.

FIG. 2 shows another configuration of the power distribution system 100. The power distribution system 100 includes a first upper system 26, a second upper system 28, a network 82, a first power management system server 24a collectively referred to as a power management system server 24, a second power management system server 24b, and an Nth power management system. Includes server 24n. The first power management system server 24a corresponds to, for example, the power management system server 24 of FIG. 1 and is installed in the first consumer 80a. A creation and storage cooperation system 72 (not shown) is also installed in the first customer 80a. Similar to the first customer 80a, the second customer 80b is provided with the second power management system server 24b and the creation and storage cooperation system 72 (not shown). The same applies to the Nth consumer 80n.

The first power management system server 24a to the Nth power management system server 24n are connected to the first higher system 26 and the second higher system 28 via the network 82. The first host system 26 is a server of the above-mentioned remote output control system, and systematically controls the output from the consumer 80 to the power system 22 in order to stabilize the power system 22. On the other hand, the second higher-level system 28 is the server of the above-mentioned VPP, predicts the power demand in each region, and systematically controls the charge / discharge of the power storage device 12 based on the prediction. As for the control in the first upper system 26 and the second upper system 28, a known technique may be used, and thus description thereof will be omitted here. The first upper system 26 and the second upper system 28 transmit a schedule as a result of control to a plurality of power management system servers 24 via the network 82. Return to FIG.

The first receiving unit 60 receives the first schedule of input / output control between the first host system 26 and the electric power system 22 in the consumer 80. Since the first host system 26 is a remote output control system, in the first schedule, information regarding suppression of output from the consumer 80 is shown as the content of the input / output control. This corresponds to the upper limit of the output from the consumer 80 being shown. FIGS. 3A to 3C show an outline of the operation of the power management system server 24. FIG. 3A shows the data structure of the first schedule. In the first schedule, "0% suppression" is indicated as the content of the input / output control from time T1 to T2. This indicates that the output is not suppressed, and when the maximum output is, for example, "4 kW", it corresponds to the upper limit of the output being 4 kW. Therefore, the output may be 4 kW or less.

Further, "50% suppression" is shown as the content of the input / output control from the time T2 to T3. This indicates that the output is suppressed by 50%, which corresponds to the upper limit of the output being 2 kW. Further, "100% suppression" is shown as the content of the input / output control from the time T3 to T4. This indicates that the output is suppressed by 100%, which corresponds to the upper limit of the output being 0 kW. 3 (b)-(c) will be described later, and the process returns to FIG.

The second receiving unit 62 receives the second schedule of input / output control between the second higher-level system 28 and the electric power system 22 in the consumer 80. Since the second higher-level system 28 is a VPP, in the second schedule, the power value to be sold or purchased for the power system 22 is indicated as the content of the input / output control. This corresponds to showing the input and output power values. FIG. 3B shows the data structure of the second schedule. In the second schedule, "2 kW power sale" is indicated as the content of the input / output control from the time T1 to T2. This corresponds to outputting electric power having a power value of 2 kW from the consumer 80 to the electric power system 22. Further, "1 kW power sale" is shown as the content of the input / output control from the time T2 to T3. This corresponds to outputting electric power having a power value of 1 kW from the consumer 80 to the electric power system 22. Further, "1 kW power purchase" is indicated as the content of the input / output control from the time T4 to T5. This corresponds to inputting electric power having a electric power value of 1 kW from the electric power system 22 to the consumer 80. FIG. 3C will be described later, and the process returns to FIG.

The processing unit 52 receives the first schedule from the first receiving unit 60 and the second schedule from the second receiving unit 62. The processing unit 52 compares the first schedule with the second schedule. The processing unit 52 generates the first control command when there is a time zone in which the contents of the input / output control in the second schedule are included in the range of the contents of the input / output control in the first schedule. The time zone in which the content of the input / output control in the first schedule includes the content of the input / output control in the second schedule is, for example, time T1 to T2 and time T2 in FIGS. 3 (a)-(b). Corresponds to T3, time T4 to T5, and time T5 to T6. From time T1 to T2, the output in the first schedule is 4 kW or less, and the output in the second schedule is 2 kW, so the latter is included in the former. From time T2 to T3, the output in the first schedule is 2 kW or less, and the output in the second schedule is 1 kW, so the latter is included in the former.

From time T4 to T5, the output in the first schedule is 2 kW or less, and the input in the second schedule is 1 kW, so the latter is included in the former. From time T5 to T6, the output in the first schedule is 2 kW or less, and the output in the second schedule is 1 kW, so the latter is included in the former. That is, the time zone in which the content of the input / output control in the first schedule includes the content of the input / output control in the second schedule is within the range below the upper limit in the first schedule in the second schedule. It can be said that this is the time zone in which the input / output power values of are included. In such a case, according to the contents of the input / output control of the second schedule, the contents of the input / output control of the first schedule are followed. Therefore, the processing unit 52 is a first control command that satisfies the contents of the input / output control in the first schedule and the contents of the input / output control in the second schedule, and sets the input / output power value in the second schedule. The corresponding first control command is generated. Such a first control command is shown in FIG. 3 (c).

On the other hand, the processing unit 52 generates the second control command when there is a time zone corresponding to the contents of the input / output control in the second schedule outside the range of the contents of the input / output control in the first schedule. The time zone corresponding to the contents of the input / output control in the second schedule outside the range of the contents of the input / output control in the first schedule corresponds to the times T3 to T4 in FIGS. 3 (a)-(b). From time T3 to T4, the output in the first schedule is 0 kW or less, and the output in the second schedule is 2 kW. Therefore, if one is satisfied, the other is not satisfied. That is, when there is a time zone corresponding to the contents of the input / output control in the second schedule outside the range of the contents of the input / output control in the first schedule, the first is higher than the upper limit value in the first schedule. It can be said that this is the case when the output power value in the two schedules is large.

In such a case, the processing unit 52 generates a second control command that deviates from either the content of the input / output control in the first schedule or the content of the input / output control in the second schedule. This second control command corresponds to either the content of the input / output control in the first schedule or the content of the input / output control in the second schedule. For example, the processing unit 52 generates a second control command according to the upper limit value in the first schedule. Such a second control command is shown in FIG. 3 (c). The processing unit 52 stores information on the penalty when the input / output control from the first upper system 26 is not followed and information on the penalty when the input / output control from the second upper system 28 is not followed. You may. At that time, the processing unit 52 generates a second control command that follows the input / output control having the larger penalty.

The processing unit 52 outputs the first control command and the second control command generated as shown in FIG. 3C to the output unit 54. Here, the first control command and the second control command are collectively referred to as control commands. The output unit 54 outputs the control command received from the processing unit 52 to the power conversion device 14.

The third conversion control unit 44 of the power conversion device 14 receives a control command from the output unit 54. When the input / output power value (hereinafter referred to as "instructed value") is indicated as in the first control command, the third conversion control unit 44 measures the power value measured by the measuring instrument 20 (hereinafter referred to as "measured value"). ”) Is executed so that it is close to the indicated value. On the other hand, when the upper limit value is indicated as in the second control command, the third conversion control unit 44 executes control so that the measured value becomes equal to or less than the upper limit value. The third conversion control unit 44 notifies the first conversion control unit 40 and the second conversion control unit 42 of the content of the control. The first conversion control unit 40 and the second conversion control unit 42 execute control according to the notified content.

A known technique may be used for these controls, but here, as an example, the control for suppressing the output from the power conversion device 14 to the power system 22 will be described. The third conversion control unit 44 controls the third conversion unit 34 so that the output of the third conversion unit 34 does not exceed a predetermined upper limit current value or upper limit power value. While the output is suppressed, the bus voltage stabilization control that controls the voltage of the DC bus 110 to be maintained at the first threshold voltage is stopped. As a result, the input power of the third conversion unit 34 becomes excessive with respect to the output power of the third conversion unit 34, and the voltage of the DC bus 110 rises. More specifically, electric charges are accumulated in the electrolytic capacitor connected to the DC bus 110. The second conversion control unit 42 controls the second conversion unit 32 so that the voltage of the DC bus 110 does not exceed the second threshold voltage. This control takes precedence over the control that adjusts the output to a predetermined command value. The second threshold voltage is set to a value higher than the first threshold voltage. The first conversion control unit 40 controls the first conversion unit 30 so that the voltage of the DC bus 110 does not exceed the third threshold voltage. This control takes precedence over MPPT control. The third threshold voltage is set to a value higher than the second threshold voltage.

Although the example in which the power management system server 24 is connected to the power conversion device 14 is shown, it may be further connected to the load 18. At this time, the power management system server 24 controls the input / output of electric power to / from the electric power system 22 in the consumer 80 by controlling the electric power conversion device 14 and the load 18. The control command for the power conversion device 14 and the control command for the load 18 are generated separately. The control shown in FIG. 3C may be realized by the combination of the control command for the power conversion device 14 and the control command for the load 18. The processing unit 52 outputs the first control command and the second control command generated as shown in FIG. 3C to the output unit 54. The output unit 54 outputs the control command received from the processing unit 52 to the power conversion device 14 and the load 18. Since a known technique may be used for control when the load 18 receives a control command, the description thereof will be omitted here. When the power management system server 24 does not control the load 18 and controls only the power conversion device 14, the control command is output only to the power conversion device 14.

Further, when the power management system server 24 is connected to the load 18, the power storage device 12 does not necessarily have to be installed in the consumer 80. When the power storage device 12 is not installed in the consumer 80, the power conversion device 14 has a function of converting the electric power from the power generation device 10, the first conversion unit 30, the first conversion control unit 40, and the third conversion unit 34. , And a third conversion control unit 44 suffices.

The subject of the device, system, or method in the present disclosure comprises a computer. By executing the program by this computer, the function of the subject of the device, system, or method in the present disclosure is realized. A computer has a processor that operates according to a program as a main hardware configuration. The type of processor does not matter as long as the function can be realized by executing the program. The processor is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or an LSI (Large Scale Integration). The plurality of electronic circuits may be integrated on one chip or may be provided on a plurality of chips. The plurality of chips may be integrated in one device, or may be provided in a plurality of devices. The program is recorded on a non-temporary recording medium such as a computer-readable ROM, optical disc, or hard disk drive. The program may be stored in the recording medium in advance, or may be supplied to the recording medium via a wide area communication network including the Internet or the like.

The operation of the power distribution system 100 with the above configuration will be described. FIG. 4 is a flowchart showing a control procedure by the power management system server 24. The first receiving unit 60 receives the first schedule (S10), and the second receiving unit 62 receives the second schedule (S12). When the input / output power value in the second schedule is included in the range below the upper limit value in the first schedule (Y in S14), the processing unit 52 issues the first control command according to the input / output power value. Generate (S16). The output unit 54 outputs the first control command (S18). When the input / output power value in the second schedule is not included in the range below the upper limit value in the first schedule (N in S14), the processing unit 52 generates a second control command according to the upper limit value. (S20). The output unit 54 outputs the second control command (S22).

According to this embodiment, the first control that satisfies the contents of the input / output control in the time zone in which the contents of the input / output control in the first schedule include the contents of the input / output control in the second schedule. Since the command is output, it is possible to execute input / output according to input / output control from a plurality of higher-level systems. Further, since the second control command deviating from one of the two is output in the time zone corresponding to the contents of the input / output control in the second schedule outside the range of the contents of the input / output control in the first schedule, a plurality of them are output. Even if the input / output control from the host system is different, the input / output can be executed normally. Further, in a time zone corresponding to the contents of the input / output control in the second schedule outside the range of the contents of the input / output control in the first schedule, the input / output control of either the first schedule or the second schedule is performed. Since the second control command is generated according to the content, the second control command can be easily generated.

Further, since the upper limit value in the output is shown in the first schedule and the input / output power value is shown in the second schedule, the processing corresponding to the input / output control from the remote output control system and the VPP can be executed. Further, in the time zone in which the input / output power value in the second schedule is included in the range below the upper limit value in the first schedule, the first control command corresponding to the input / output power value in the second schedule is output. Therefore, it is possible to execute the process according to the input / output control from the VPP. Further, when the power value of the output in the second schedule is larger than the upper limit value in the first schedule, the second control command corresponding to the upper limit value in the first schedule is output, so that the remote output control system can be used. Processing can be executed according to input / output control.

The outline of one aspect of the present invention is as follows. The power management system server 24 of a certain aspect of the present invention is a power management system server 24 that controls input / output of power to / from the power system 22 in the consumer 80, and controls input / output from the first higher-level system 26. The first receiving unit 60 that receives the first schedule, the second receiving unit 62 that receives the second schedule of input / output control from the second higher system 28 different from the first higher system 26, and the first receiving unit 60. Is a first control command for a time zone in which the content of the input / output control in the first schedule received by the second receiver 62 includes the content of the input / output control in the second schedule received by the second receiving unit 62. It includes an output unit 54 that outputs a first control command that satisfies the contents of the input / output control in the first schedule and the contents of the input / output control in the second schedule. The output unit 54 is a second control command for a time zone corresponding to the contents of the input / output control in the second schedule outside the range of the contents of the input / output control in the first schedule, and is in the first schedule. A second control command that deviates from either the content of the input / output control or the content of the input / output control in the second schedule is output.

The output unit 54 has the contents of the input / output control in the first schedule and the second in the time zone corresponding to the contents of the input / output control in the second schedule outside the range of the contents of the input / output control in the first schedule. A second control command may be output according to one of the contents of the input / output control in the schedule.

In the first schedule received by the first receiving unit 60, the upper limit value in the output is shown as the content of the input / output control, and in the second schedule received by the second receiving unit 62, the input / output is input / output as the content of the input / output control. The power value of is shown, and the output unit 54 outputs the input / output power of the second schedule in the time zone in which the input / output power value of the second schedule is included in the range below the upper limit value of the first schedule. The first control command corresponding to the value is output, and when the power value of the output in the second schedule is larger than the upper limit value in the first schedule, the output unit 54 corresponds to the upper limit value in the first schedule. The second control command may be output.

Another aspect of the present invention is the power conversion system 70. The power conversion system 70 is a power conversion device 14 connected to the power generation device 10 and the power storage device 12 installed in the consumer 80 and the power system 22, and the input / output of power on the power system 22 side in the power conversion device 14. It is provided with a power management system server 24 that controls the above. The power management system server 24 is different from the first receiving unit 60 that receives the first schedule of input / output control between the first higher system 26 and the power system 22 in the consumer 80, and the first higher system 26. The second receiving unit 62 that receives the second schedule of input / output control between the second higher system 28 and the power system 22 in the consumer 80, and the input / output control in the first schedule received by the first receiving unit 60. This is the first control command for the time zone in which the content of the input / output control in the second schedule received by the second receiving unit 62 is included in the range of the content of, and the content of the input / output control in the first schedule. It includes an output unit 54 that outputs a first control command that satisfies the contents of the input / output control in the second schedule. The output unit 54 is a second control command for a time zone corresponding to the contents of the input / output control in the second schedule outside the range of the contents of the input / output control in the first schedule, and is in the first schedule. A second control command that deviates from either the content of the input / output control or the content of the input / output control in the second schedule is output.

(Example 2)
Next, Example 2 will be described. The second embodiment also relates to a power management system that controls the input / output of electric power in the creation / storage cooperation system installed in the consumer, as in the first embodiment. Here, it relates to the processing when the control command cannot be executed by the consumer. The case where the control command cannot be executed is, for example, the case where the power purchase should be instructed by the control command, but when the free capacity of the power storage device is low, the power sale should be instructed by the control command. , When the weather is not sunny and the amount of power generation is small. The power distribution system 100 according to the second embodiment is the same type as in FIG. Here, the differences from the first embodiment will be mainly described.

FIG. 5 shows the configuration of the power management system server 24 according to the second embodiment. Compared to FIG. 1, the power management system server 24 further includes an acquisition unit 56, and the communication unit 50 further includes a third reception unit 64. Further, the third receiving unit 64 is connected to the weather forecast server 90.

As described above, the first receiving unit 60 receives the first schedule from the first higher system 26, and the second receiving unit 62 receives the second schedule from the second higher system 28. Here, in the time zone in which the power value of the input in the second schedule is included in the range below the upper limit value in the first schedule, that is, the first processing unit 52 corresponds to the power value of the input / output in the second schedule. The case where a control command should be generated is the subject of explanation. It should be noted that the time zone in which the input power value in the second schedule is not included in the range below the upper limit value in the first schedule, that is, the processing unit 52 issues the second control command according to the upper limit value in the first schedule. The same process may be executed even when it should be generated.

In the second schedule, as the content of the input / output control, the power value at the input, for example, the purchase of 1 kWh of power is shown. The second conversion control unit 42 acquires information on the remaining amount or free capacity of the power storage device 12 (not shown). Since a known technique may be used for this, the description thereof will be omitted here. The acquisition unit 56 is connected to the second conversion control unit 42, and acquires free space information from the second conversion control unit 42. In the free space information, for example, 0.5 kWh is shown.

The processing unit 52 compares the free capacity of the power storage device 12 with the power value of the input shown in the second schedule. When the former is less than the latter, that is, when the power storage device 12 cannot charge the input power, the processing unit 52 is different from the input power value in the second schedule instead of the first control command. Generate a third control command. This corresponds to the case where the free capacity of the power storage device 12 is 0.5 kWh and the input power value is 1 kWh. In the third control command, 50% suppression in the first schedule is indicated, or 0.5 kWh is indicated according to the free capacity of the power storage device 12.

Further, in the second schedule, the power value at the output, for example, 2 kW of power sale is shown as the content of the input / output control. The weather forecast server 90 is a server for providing weather forecast information, and the third receiving unit 64 receives the weather forecast information from the weather forecast server 90. The processing unit 52 stores in advance a table showing the correspondence between the weather forecast information and the electric power that the power generation device 10 can generate. When the power sale is indicated in the second schedule, the processing unit 52 derives the power that can be generated corresponding to the weather forecast information received by the third receiving unit 64 while referring to the table. The processing unit 52 compares the derived power value that can generate power with the power value of the output shown in the second schedule. When the former is smaller than the latter, that is, when the power generation device 10 cannot generate the power of the power value, the processing unit 52 uses the power value of the output in the second schedule instead of the first control command. Generate a different third control command. This corresponds to the case where the power value capable of generating power is 1 kW and the power value of the output is 2 kW. The output unit 54 outputs the third control command received from the processing unit 52 to the power conversion device 14 and the load 18.

The operation of the power distribution system 100 with the above configuration will be described. FIG. 6 is a flowchart showing a control procedure by the power management system server 24. This corresponds to the case where the input of electric power should be instructed by the first control command or the second control command. If the power storage device 12 can be charged (Y in S50), the processing unit 52 generates the first control command or the second control command (S52), and the output unit 54 generates the generated first control command or the second control command. A control command is output (S54). If the power storage device 12 is not rechargeable (N in S50), the processing unit 52 generates a third control command (S56), and the output unit 54 outputs the generated third control command (S58).

FIG. 7 is a flowchart showing another control procedure by the power management system server 24. This corresponds to the case where the output of electric power should be instructed by the first control command or the second control command. If the power generation device 10 can generate power (Y in S100), the processing unit 52 generates the first control command or the second control command (S102), and the output unit 54 generates the generated first control command or the second control command. A control command is output (S104). If the power generation device 10 is not capable of generating power (N in S100), the processing unit 52 generates a third control command (S106), and the output unit 54 outputs the generated third control command (S108).

According to this embodiment, even if the input of electric power should be instructed by the first control command or the second control command, if the power storage device 12 cannot charge the input electric power, the third control command is issued. Since it is output, it is possible to avoid inputting power that cannot be charged. Further, even if the output of electric power should be instructed by the first control command or the second control command, if the power generation device 10 cannot generate the electric power of the instructed electric power value, the third control command is issued. Since it is output, it is possible to avoid outputting power that cannot be generated.

The outline of one aspect of the present invention is as follows. The output unit 54 outputs a third control command when the power storage device 12 cannot charge the input power even when the input of electric power should be instructed by the first control command or the second control command. You may.

Even if the output unit 54 should instruct the output of electric power by the first control command or the second control command, the output unit 54 is the third when the power generation device 10 cannot generate the electric power of the instructed electric power value. A control command may be output.

The present invention has been described above based on examples. This embodiment is an example, and it is understood by those skilled in the art that various modifications are possible for each of these components or combinations of each processing process, and that such modifications are also within the scope of the present invention. ..

10 Power generation device, 12 Power storage device, 14 Power converter, 16 Distribution board, 18 Load, 20 Measuring instrument, 22 Power system, 24 Power management system server, 26 1st upper system, 28 2nd upper system, 30 1st Conversion unit, 32 2nd conversion unit, 34 3rd conversion unit, 40 1st conversion control unit, 42 2nd conversion control unit, 44 3rd conversion control unit, 50 communication unit, 52 processing unit, 54 output unit, 60th 1 receiver, 62 second receiver, 70 power conversion system, 72 creation and storage cooperation system, 100 distribution system.

Claims (7)

A power management system that controls the input and output of power to and from the power system of consumers.
The first receiver that receives the first schedule of input / output control from the first host system, and
A second receiving unit that receives a second schedule of input / output control from a second higher system different from the first higher system, and
The first control command for the time zone in which the content of the input / output control in the first schedule received by the first receiving unit includes the content of the input / output control in the second schedule received by the second receiving unit. Moreover, it is provided with an output unit that outputs a first control command that satisfies the contents of the input / output control in the first schedule and the contents of the input / output control in the second schedule.
The output unit is a second control command for a time zone corresponding to the contents of the input / output control in the second schedule outside the range of the contents of the input / output control in the first schedule, and is in the first schedule. A power management system characterized by outputting a second control command that deviates from either the content of input / output control or the content of input / output control in the second schedule. The output unit is outside the range of the contents of the input / output control in the first schedule, and in the time zone corresponding to the contents of the input / output control in the second schedule, the contents of the input / output control in the first schedule and the second The power management system according to claim 1, wherein a second control command corresponding to any one of the contents of input / output control in the schedule is output. In the first schedule received by the first receiving unit, the upper limit value in the output is shown as the content of the input / output control.
In the second schedule received by the second receiving unit, the input / output power value is shown as the content of the input / output control.
The output unit is the first control according to the input / output power value in the second schedule in the time zone in which the input / output power value in the second schedule is included in the range below the upper limit value in the first schedule. Output the command,
The output unit is characterized in that when the power value of the output in the second schedule is larger than the upper limit value in the first schedule, the output unit outputs a second control command according to the upper limit value in the first schedule. The power management system according to claim 1. The output unit outputs a third control command when the power storage device cannot charge the input power even when the input of electric power should be instructed by the first control command or the second control command. The power management system according to claim 3. Even if the output unit should instruct the output of electric power by the first control command or the second control command, if the power generation device cannot generate the electric power of the instructed electric power value, the third control The power management system according to claim 3, wherein a command is output. Power generation equipment and power storage equipment installed in consumers, power conversion equipment connected to the power system, and
It is provided with a power management system that controls the input / output of power on the power system side in the power conversion device.
The power management system
The first receiver that receives the first schedule of input / output control from the first host system to the power system in the consumer,
A second receiving unit that receives a second schedule of input / output control between the second upper system different from the first upper system and the electric power system in the consumer.
The first control command for the time zone in which the content of the input / output control in the first schedule received by the first receiving unit includes the content of the input / output control in the second schedule received by the second receiving unit. Moreover, it is provided with an output unit that outputs a first control command that satisfies the contents of the input / output control in the first schedule and the contents of the input / output control in the second schedule.
The output unit is a second control command for a time zone corresponding to the contents of the input / output control in the second schedule outside the range of the contents of the input / output control in the first schedule, and is in the first schedule. A power conversion system characterized by outputting a second control command that deviates from either the content of input / output control or the content of input / output control in the second schedule. A program in a power management system that controls the input and output of power to and from the power system of consumers.
The step of receiving the first schedule of input / output control from the first host system,
A step of receiving a second schedule of input / output control from a second higher system different from the first higher system, and
It is the first control command for the time zone in which the content of the input / output control in the first schedule includes the content of the input / output control in the second schedule, and the content of the input / output control in the first schedule. The step of outputting the first control command that satisfies the contents of the input / output control in the second schedule, and
The content of the input / output control in the second schedule is a second control command for the corresponding time zone outside the range of the content of the input / output control in the first schedule, and the content of the input / output control in the first schedule. A program for causing the computer to execute a step of outputting a second control command that deviates from one of the contents of the input / output control in the second schedule.

Images