JP6936097B2 - Power management device and power management method - Google Patents

Description

The present invention relates to a power management device and a power management method.

Patent Document 1 describes a power management system that determines the amount of power reduction to be reduced by each consumer according to the maximum contract current value when responding to demand response. Here, the demand response (DR: Demand Response) means that the consumer side suppresses the use of electric power in response to the setting of the electricity rate price or the payment of the incentive when the wholesale market price rises or the grid reliability declines. It is defined as changing the power consumption pattern.

Conventionally, for large consumers such as factories and buildings that consume a large amount of power, demand response at peak power consumption has been performed by demand control, storage battery control, and the like. For example, when there is a demand control request at the peak demand during the cooling operation period, the demand is suppressed by raising the air conditioner set temperature or stopping the less important equipment such as lighting. Further, in the demand control method using a storage battery, a large storage battery is charged in advance and discharged at a designated time of demand control, and the purchased power during that time is suppressed for a certain period of time.

On the other hand, for consumers such as ordinary houses, the range in which demand can be suppressed is small because the power consumption is not large. Therefore, even if the demand in general housing is suppressed, the sufficient effect of demand control cannot be expected. On the other hand, in recent years, based on contracts between aggregators and multiple consumers, the amount of power demand reductions made in response to requests from electric power companies (including retail electric power companies and grid operators), etc. Efforts to trade capacity are being considered. Here, an aggregator (also referred to as a DR aggregator) is a business operator that bundles a plurality of consumers and trades the amount of demand reduction by DR with an electric power company.

In addition, with the expansion of the introduction of power generation equipment using renewable energy such as solar power generation equipment, it is considered that the change in the power consumption pattern in the demand response includes an increase in demand in addition to a reduction in demand. That is, it is being studied to stabilize the quality of electricity in the distribution system by encouraging consumers to increase the consumption of electric power when an oversupply of electric power occurs.

Japanese Patent No. 5922138

By the way, in consumers such as general houses, the introduction of storage batteries is being promoted along with the introduction of power generation facilities using renewable energy. Charging and discharging of storage batteries is considered to contribute to reducing and increasing demand for electric power. However, in the storage battery, the start-up or stop control rises (or falls) quickly. Therefore, if many storage batteries are started or stopped at the same time, the voltage may rise or fall at once, which may affect the power transmission and distribution system.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a power management device and a power management method capable of reducing the influence on the power transmission and distribution system when starting or stopping a plurality of storage batteries. There is.

In order to solve the above problems, one aspect of the present invention is a device for managing the power supply and demand in a plurality of consumer facilities each having a storage battery, and when starting or stopping two or more of the plurality of storage batteries. There are a plurality of storage batteries to be operated at least one of start and stop, and the plurality of the storage batteries are grouped into two or more groups, and a time difference is provided so that the timing of performing the operation is different for each group. It has an adjusting unit that adjusts the start or stop timing so as to perform the operation, and the adjusting unit indicates each voltage at a plurality of points of the power transmission and distribution system that transmits power to the plurality of consumer facilities. Group according to the voltage monitoring result and the connection position of each consumer facility to the power transmission and distribution system. If the operation is discharge, start from the group with the lowest voltage, and if the operation is charge. Is a power management device that starts up from a group with a high voltage.

Further, one aspect of the present invention is the power management device, in which the coordinating unit performs the grouping according to the connection position of each consumer facility to the distribution system or the power transmission system.

Further, one aspect of the present invention is the power management device, in which the adjusting unit divides the grouping according to the measurement result of the voltage of the distribution system or the power transmission system to which the customer facilities are connected. conduct.

Further, one aspect of the present invention is the power management device, further including a determination unit for determining the necessity of the adjustment by the adjustment unit, and the adjustment unit requires the determination unit to make the adjustment. If it is determined that the above adjustment is made.

Further, one aspect of the present invention is a method of managing the power supply and demand in a plurality of consumer facilities each having a storage battery, and is activated when two or more of the plurality of storage batteries are started or stopped by the coordinating unit. Alternatively, there are a plurality of storage batteries to be operated at least one of the stops, and the plurality of the storage batteries are grouped into two or more groups, and each group has a time difference so that the timing of performing the operation is different. In the process of adjusting the start or stop timing so as to perform the operation, and in the process of performing the adjustment, a voltage monitoring result indicating each voltage at a plurality of points of the power transmission and distribution system to transmit power to the plurality of consumer facilities is obtained. , Group according to the connection position of each consumer facility to the power transmission and distribution system. If the operation is discharge, start from the group with the lowest voltage, and if the operation is charge, the voltage It is a power management method that starts up from a high group.

According to the present invention, it is possible to reduce the influence on the power transmission and distribution system when starting or stopping a plurality of storage batteries.

It is a schematic diagram which shows the structural example of the storage battery group operation system which concerns on one Embodiment of this invention. It is a block diagram which shows the configuration example of the electric power management apparatus 10 and the consumer facility 20 shown in FIG. It is a schematic diagram which shows the connection example to the power transmission and distribution system of a plurality of consumer facilities 20-1, ... Shown in FIG. It is a schematic diagram which shows the structural example of the distribution system connection information 134 shown in FIG. It is a flowchart which shows the operation example of the control device 12 shown in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. It is a schematic diagram which shows the structural example of the storage battery group operation system which concerns on one Embodiment of this invention. The storage battery group operation system 1 shown in FIG. 1 includes a power management device 10 and a plurality of large-scale consumer facilities such as general households 20-1, 20-2, 20-3, ..., 20-7, ... It is equipped with customer facilities 30-1, .... The plurality of consumer facilities 20-1, 20-2, 20-3, ..., 20-7, ... Have storage batteries 21-1, 21-2, 21-3, ..., 21-7, ..., Respectively. The consumer facility 30-1, ... Has a storage battery 31-1, ... Hereinafter, a plurality of consumer facilities 20-1, 20-2, 20-3, ..., 20-7, ... May be referred to as each consumer facility 20 (or, in the case of one, the consumer facility 20). Similarly, the storage batteries 21-1, 21-2, 21-3, ..., 21-7, ... May be collectively referred to as the storage battery 21. Further, a plurality of consumer facilities 30-1, ... Are referred to as each consumer facility 30 (or, in the case of one, the consumer facility 30). Similarly, the storage batteries 31-1, ... May be collectively referred to as the storage battery 31. The number of customer facilities 30 may be 0.

In the present embodiment, the electric power management device 10 is, for example, a computer such as a server operated by a business operator (aggregator) that trades with a parent aggregator such as an electric power company or an electric power company. The electric power management device 10 is used to manage the supply and demand of electric power in each consumer facility 20 and each consumer facility 30, for example, in correspondence with the planned value simultaneous equal amount system. That is, the operator of the power management device 10 formulates a power supply / demand plan for each customer facility 20 and each customer facility 30 as a whole for each predetermined unit planning time (for example, 30 minutes), and the power supply / demand is formulated. Submit the plan to the general power transmission and distribution business operator. In addition, if the actual power supply and demand in each customer facility 20 and each customer facility 30 as a whole causes an excess or deficiency (imbalance) with respect to the power supply and demand plan, the electric power company and the general power transmission and distribution business operator Settlement corresponding to imbalance (imbalance settlement) is performed between them.

The power supply and demand plan in this embodiment includes a power generation plan and a demand plan. The power generation plan may have a planned value of each consumer facility 20 and each consumer facility 30 as a whole, or an individual planned value of the consumer facility 20 and the consumer facility 30 for the electric power to be reverse-flowed to the distribution system. The demand plan may have a planned value of each consumer facility 20 and each consumer facility 30 as a whole for electric power purchased from the distribution system in a forward flow, or an individual planned value of the consumer facility 20.

Under the planned value simultaneous equal amount system corresponding to this embodiment, it is required that the actual results for each of the power generation plan and the demand plan are achieved as planned. That is, in the planned value simultaneous equal amount system corresponding to this embodiment, it is required that the actual power flowed from each customer facility 20 and each customer facility 30 as a whole is not excessive or deficient with respect to the power generation plan. At the same time, it is required that the actual power generated by each customer facility 20 and each customer facility 30 as a whole is not excessive or deficient with respect to the demand plan. In the present embodiment, the generated power means the power to be reverse power flowed to the distribution system. In addition, the demand power refers to the power that flows forward from the distribution system. In the present embodiment, the generated power includes the power generated by the power generation facility 25 and the power discharged by the storage battery 21.

Based on the power generation plan and the demand plan, the power management device 10 executes power control for the power equipment in each customer facility 20 and each customer facility 30 as a whole. The power management device 10 is connected to each of the consumer facility 20 and each consumer facility 30 via a communication line 40 so as to be able to communicate with each other. As a result, the electric power management device 10 can transmit a predetermined control command and control the operation of the electric power equipment provided in the consumer facility 20 and the electric power facility 30 (electric power equipment control). Further, the power management device 10 is connected to the host control system 50 via a communication line 60 so as to be able to communicate with each other.

Further, the power management device 10 in the present embodiment bundles a plurality of consumers (each consumer facility 20 and each consumer facility 30) to manage demand reduction or demand increase (collectively referred to as demand change) by DR. Used for In this case, the power management device 10 makes a request for power adjustment (request for power adjustment) at each customer facility 20 or each customer facility 30 from the upper control system 50 (computer such as a server) operated by the parent aggregator. Receive via 60. Further, the power management device 10 selects one or more storage batteries 21 or storage batteries 31 in response to the received power adjustment request, and each consumer facility 20 or consumer facility having each selected storage battery 21 or storage battery 31. A predetermined control command is transmitted to 30 via the communication line 40 to control charging / discharging in each selected storage battery 21 or storage battery 31.

In the present embodiment, the request for power adjustment includes a request for reducing demand and a request for increasing demand for each customer facility 20 and each customer facility 30 managed by the power management device 10. In addition, the request for demand reduction includes a request for reduction of power flow power and a request for increase of reverse power flow power. Further, the request for power adjustment may include a content that directly indicates a change in charge / discharge power, discharge power, or charge power in the storage battery 21 or the storage battery 31.

Further, the storage battery group operation system 1 can be configured in a form (for example, as one function) included in a power management system such as TEMS (Town Energy Management System) or CEMS (Community Energy Management System). Further, the power management device 10 can be configured (for example, as one function) in a form included in a management device (management server) in a power management system such as TEMS or CEMS. Here, TEMS and CEMS are systems that collectively manage electric power in each consumer facility 20 such as a residential, commercial facility, and industrial facility and each consumer facility 30 in a predetermined area range, for example. In this case, the power management device 10 manages (predicts and controls) the charge / discharge power of the plurality of storage batteries 21 and the storage batteries 31 of each customer facility 20 and each customer facility 30, and also, for example, the power generated by the power generation facility. It can be configured as a device that manages (prediction and control) and manages the power consumption of load equipment (prediction and control). Further, the consumer facility managed by the power management device 10 may include a consumer facility that does not have a storage battery. In addition, in this embodiment, a predetermined area range may be formed by one area range, or may be formed by a plurality of geographically discrete area ranges.

FIG. 2 is a block diagram showing a configuration example of the power management device 10 and the consumer facility 20 shown in FIG. In the configuration example shown in FIG. 2, the consumer facility 20 includes a communication unit 24, a control device 22, a distribution board 23, a storage battery 21, a power generation facility 25, a power load facility 26, and a power meter 28.

The communication unit 24 transmits and receives predetermined information to and from the power management device 10 via the communication line 40. The communication line 40 is composed of a communication line 43, a network 41 such as the Internet, and a communication line 42.

The control device 22 controls the electric equipment (power generation equipment 25, storage battery 21, power load equipment 26, communication unit 24, etc.) in the consumer facility 20. Further, the control device 22 can input the power consumption information measured by the power meter 28 and use the input power consumption information for various controls.

In the present embodiment, among the storage battery 21, the power generation facility 25, and the power load facility 26 included in the consumer facility 20, those that can be controlled by the power management device 10 via, for example, the control device 22 are referred to as power facilities. In the present embodiment, the charging power and the discharging power of the storage battery 21 are controlled by the power management device 10. Further, the generated power of a part or all of the power generation facility 25 may be controllable by the power management device 10. Further, the power consumption of a part or all of the power load equipment 26 may be controllable by the power management device 10. That is, the storage battery 21, the power generation facility 25 and the power load facility 26 that can be controlled by the power management device 10 are power facilities.

The control device 22 controls the charge / discharge power, the generated power, the power consumption, and the like of the power equipment provided in the consumer facility 20 according to the instruction received from the power management device 10. At that time, the control device 22 controls the charge / discharge power of the storage battery 21 and the like according to the control command received from the power management device 10.

The control device 22 also collects power-related information in the consumer facility 20. The control device 22 can collect information on the supply and demand power measured by the power meter 28, for example. Further, the control device 22 can collect the power generated by the power generation facility 25, the remaining capacity (stored power) and charge / discharge power of the storage battery 21, the load power (power consumption) of the power load facility 26 and the like. The control device 22 also manages the collected information such as generated power, charge / discharge power, demand power, supply / supply power, etc. from the communication unit 24 at predetermined time intervals or in response to a request from the power management device 10. It is transmitted to the device 10.

The distribution board 23 distributes the electric power supplied from the service line 71 via the electric power meter 28 to the storage battery 21, the electric power load facility 26, and the like via the wiring 27 and supplies the electric power. The drop line 71 is a component of the distribution system on the general power transmission and distribution business operator side. Further, the distribution board 23 can output the electric power output from the power generation facility 25 or the like to the service line 71 via the electric power meter 28 due to reverse power flow.

The storage battery 21 is a facility that stores electric power input for charging and discharges and outputs the stored electric power. The storage battery 21 includes, for example, a secondary battery and an inverter. The storage battery 21 stores (charges) electric power and outputs (discharges) the stored electric power. The inverter converts the electric power for charging the secondary battery from alternating current to direct current, and converts the electric power output from the secondary battery by discharge from direct current to alternating current. That is, the inverter performs bidirectional conversion of the power input / output from the secondary battery. The charge / discharge power of the storage battery 21 is controlled by the control device 22.

The storage battery 21 can be charged by inputting the electric power of the commercial power supply supplied through the distribution board 23. Further, the storage battery 21 can be charged by inputting the electric power generated by the power generation facility 25. Further, the storage battery 21 can supply the stored electric power as a power source for the electric power load facility 26. Further, the storage battery 21 can reverse power flow by outputting the stored electric power from the distribution board 23 to the service line 71 via the electric power meter 28.

The power generation facility 25 is, for example, a facility that receives sunlight to generate power. The power generation facility 25 includes, for example, a solar cell and a PCS (Power Conditioning System). The power generation facility 25 receives sunlight to generate power, converts the power obtained by the power generation into alternating current by PCS, and outputs the power.

The electric power generated by the power generation facility 25 can be supplied as a power source for the power load facility 26. Further, the electric power generated by the power generation facility 25 can be charged to the storage battery 21. Further, the electric power generated by the power generation facility 25 can be reverse-flowed by being output from the distribution board 23 to the drop line 71 via the electric power meter 28.

The power generation facility 25 and the storage battery 21 may have an integrated configuration such as a power conversion circuit.

The electric power load facility 26 collectively indicates one or a plurality of predetermined devices and facilities that consume electric power for their own operation in the consumer facility 20. The type and number of devices, equipment, and the like as loads provided by each consumer facility 20 may be different. The power load equipment 26 can operate by inputting the commercial power supply supplied from the distribution board 23. Further, the electric power load facility 26 can operate by inputting the electric power generated by the power generation facility 25. Further, the power load equipment 26 can operate by inputting the power output from the storage battery 21.

Further, the power load equipment 26 includes a load whose power consumption can be controlled by a control device 22 or the like, such as a hot water storage type water heater, a heat storage type air conditioner, a clothes dryer, a dish dryer, a storage battery (load as a charging target), and the like. You may.

The watt-hour meter 28 measures the demand power and the generated power. That is, the watt-hour meter 28 measures the supply and demand power. The supply and demand power is, for example, the difference between the demand power and the generated power. In the consumer facility 20, the electric power supplied from the drop line 71 to the distribution board 23 is the demand electric power. On the other hand, the electric power output from the storage battery 21 and the power generation facility 25 and supplied from the distribution board 23 to the service line 71 via the electric power meter 28 is the generated electric power. When the forward power flow corresponding to the demand power is set to the positive direction, if the generated power corresponding to the reverse power flow is smaller than the demand power corresponding to the forward power flow, the supply and demand power is measured as a positive value and is relative to the demand power. If the generated power is large, the supply and demand power is measured as a negative value. The watt-hour meter 28 is generated by, for example, a demand meter that measures the demand power used in one consumer facility 20, and a power generation facility 25 or the like that uses natural energy such as a solar power generator in one consumer facility 20. It is equipped with a power generation meter that measures the generated power generation.

The power meter 28 may be used as a smart meter, for example, so that the measured power supply and demand information can be transmitted to the power management device 10 via the network 41 or the like. In this case, the control device 22 does not have to collect the supply and demand power measured by the power meter 28.

The consumer facility 20 may include either a storage battery 21 or a power generation facility 25. Further, the consumer facility 20 may be provided with neither the storage battery 21 nor the power generation facility 25. Further, the power generation facility 25 is not limited to one using a solar cell, and may be a power generation device that generates power using other renewable energies such as wind power generation and geothermal power generation, or a combination thereof.

Further, the storage battery 21 and the power generation facility 25 included in the consumer facility 20 are grid-connected to the commercial power source. As a result, the consumer facility 20 provided with the storage battery 21 or the power generation facility 25 outputs the power generated and output by the power generation facility 25 or the power output by the storage battery 21 by discharging to the power system (including the power transmission system and the distribution system) of the commercial power source. ), And the power can be sold through the power system.

The consumer facility 30 has the same basic configuration as the consumer facility 20. That is, in the consumer facility 30, the charge / discharge power, the generated power, the power consumption, and the like of the power equipment included in the consumer facility 30 are controlled according to the instruction received from the power management device 10. At that time, in the consumer facility 30, the charge / discharge power of the storage battery 31 is controlled according to the charge / discharge command received from the power management device 10. However, in general, commercial power is distributed to the consumer facility 20 from a pillar transformer, a road transformer, etc. connected to the high voltage distribution line of the distribution system via the low voltage distribution line, but the consumer facility Commercial power is distributed directly to 30, for example, from a high-voltage distribution line.

On the other hand, the power management device 10 includes a communication unit 11, a control device 12, and a storage unit 13. The control device 12 can be composed of, for example, a combination of hardware such as a CPU (central processing unit), a main storage device, an auxiliary storage device, and an input / output device, and a predetermined program executed by the CPU.

The communication unit 11 communicates with the control device 22 in the consumer facility 20 via the communication line 40. Further, the communication unit 11 communicates with the host control system 50 via the communication line 60. The communication line 60 may also be configured via a network 41 such as the Internet, like the communication line 40.

The storage unit 13 stores information used by the control device 12 for power management. The storage unit 13 of the present embodiment stores power generation plan information 131, demand plan information 132, consumer facility basic information 133, and distribution system connection information 134.

The power generation plan information 131 is information indicating the power generated by the formulated power generation plan. The demand plan information 132 is information indicating the demand power according to the formulated demand plan. The consumer facility basic information 133 includes basic information about each consumer facility 20 and each consumer facility 30. For example, the basic information of the customer facility corresponding to one customer facility 20 includes the customer facility ID (identification code) uniquely indicating the customer facility 20, the value of the contracted power of the customer facility 20, and the power generation facility 25. Rated output value, rated power (rated output) value (rated charge / discharge power value, rated discharge power value and rated charge power value) and capacity of the storage battery 21, power load equipment provided in the consumer facility 20 Information about the 26 and information such as the address of the communication unit 24 and the control device 22 included in the consumer facility 20 are included.

The distribution system connection information 134 represents information (information indicating a connection distribution system) indicating the position or component of the distribution system to which each consumer facility 20 and each consumer facility 30 are connected. The components of the distribution system are, for example, distribution substations, banks in distribution substations, extra-high distribution lines, high-pressure distribution lines or low-pressure distribution lines, transformers (pole transformers, road transformers, etc.), breakers, drop lines. Etc. are included. The components of these distribution systems are installed in or on land-based structures. Therefore, the information that identifies the component is the information that identifies a certain area or point (that is, position) in the distribution system. The position of the distribution system may be represented by coordinate information in the coordinate system, information indicating a lot number, or the like. In this case, the connected components can be specified by matching the coordinate information and lot number of the components of the distribution system. The distribution system connection information 134 may include information indicating one or more components. Here, a configuration example of the distribution system connection information 134 will be described with reference to FIGS. 3 and 4. FIG. 3 is a schematic diagram showing an example of connection of the plurality of consumer facilities 20-1, ... Shown in FIG. 1 to the distribution system. FIG. 4 is a schematic diagram showing a configuration example of the distribution system connection information 134 shown in FIG. In the examples shown in FIGS. 3 and 4, only the consumer facility 20 is targeted for simplification of the explanation.

The power transmission / distribution system 700 shown in FIG. 3 includes a power transmission system 7-1, a power distribution system 70-1, and a power distribution system 70-2. The power transmission system 7-1 includes a plurality of power transmission lines connecting a plurality of power plants and a plurality of distribution substations. The distribution system 70-1 includes components such as a distribution substation and an intermediate substation connected to the transmission system 7-1, a plurality of distribution lines, a plurality of circuit breakers, a plurality of transformers, and a plurality of service lines. Be prepared. The distribution system 70-2 includes components such as distribution substations and intermediate substations connected to the transmission system 7-1, multiple distribution lines, multiple circuit breakers, multiple transformers, and multiple drop lines. Be prepared.

In the example shown in FIG. 3, the power management device 10 of the storage battery group operation system 1 of the present embodiment has the consumer facilities 20-1 to 20-10 connected to the distribution system 70-1 and the distribution system 70-2. It manages the power supply and demand of consumer facilities 20-10 to 20-20 connected to. When each consumer facility 20 is connected to the power transmission / distribution system 700 in the form shown in FIG. 3, the power distribution system connection information 134 can be configured as shown in FIG. 4, for example. The distribution system connection information 134 shown in FIG. 4 provides identification information of each customer facility 20, identification information of the storage battery 21 included in each consumer facility 20, and information indicating the connection distribution system for each customer facility 20. It is the information to be associated. The information indicating the connected distribution system includes information indicating the distribution system (distribution system 70-1 or distribution system 70-2 in FIG. 3) to which each consumer facility 20 is connected, or information indicating each consumer facility 20 is connected. It can be information indicating the above-mentioned components of the current distribution system, information indicating the transmission system to which the distribution system is connected, or the like. The information indicating the connection distribution system includes, for example, information for specifying the distribution system 70-1, information for specifying the transmission system 7-1, a distribution substation or an intermediate substation which is a component of the distribution system 70-1. Information that identifies a plurality of distribution lines, a plurality of circuit breakers, a plurality of transformers, a plurality of service lines, etc., or a combination thereof can be used. It may also include information indicating other distribution systems connected via a circuit breaker or the like when, for example, a power failure occurs.

In the example shown in FIG. 4, the distribution system connection information 134, for example, the consumer facility 20-1 includes the storage battery 21-1, and the consumer facility 20-1 is connected to the distribution system 70-1. Indicates that The distribution system connection information 134 may be configured in a form included in the consumer facility basic information 133, or may be configured in a form in which a part thereof is shared.

The control device 12 includes a power control unit 121, a reception unit 122, an adjustment necessity determination unit 123, and a start / stop time adjustment unit 124.

The power control unit 121 is based on the power generation plan information 131 and the demand plan information 132 stored in the storage unit 13 and the actual value (actual measurement value) of the power supply and demand in each customer facility 20 and each customer facility 30. Each control command for the consumer facility 20 and each consumer facility 30 is generated, and each generated control command is transmitted to each customer facility 20 and each consumer facility 30, and each customer facility 20 and each consumer facility 30 are transmitted. Control the power equipment at 30. Further, when the power control unit 121 receives a power adjustment request from the upper control system 50 operated by the power company or the like which is the parent aggregator, the power control unit 121 responds to the received power adjustment request to each consumer facility. Each control command for 20 and each customer facility 30 is updated or generated and transmitted to control the electric power equipment in each customer facility 20 and each customer facility 30. The electric power management device 10 transmits each generated or updated control command to each consumer facility 20 and each consumer facility 30 via the communication unit 11, and each electric power included in each consumer facility 20 and each consumer facility 30. Control the operation of equipment (power equipment control). The control command is information that indicates, for example, the operating state of each electric power facility for each unit planned time or for each predetermined control time divided into a plurality of unit planned times with control targets (target values of charging power and discharging power, etc.). be. In the present embodiment, the control command changes the indicated value of the charge / discharge power when changing (starting, stopping, etc.) the operating state (charge / discharge power, etc.) of each power facility (at least each storage battery 21 and each storage battery 31). It contains information that indicates the delay time from the start time of the unit planning time or the control time for executing the change of the time or the operating state for each customer facility 20 and each customer facility 30.

The receiving unit 122 receives a request for power adjustment at a predetermined request time from the upper control system 50 operated by the electric power company or the like, which is a parent aggregator, via the communication unit 11. The predetermined requested time is the time when the power adjustment, that is, the demand reduction or the demand increase is requested, and is defined by, for example, the start time and the end time or the start time and the duration. The request for electric power adjustment includes information indicating the requested time for electric power adjustment, the value of electric power for which demand reduction or demand increase is requested, the value of electric energy, etc. in response to the request by DR.

The adjustment necessity determination unit 123 needs to confirm the content of each control command and adjust the content before the power control unit 121 transmits each control command to each customer facility 20 and each consumer facility 30. Determine if it exists. For example, every time the power control unit 121 generates or updates a control command, the adjustment necessity determination unit 123 confirms the content of each control command in the unit planning time or the control time, and whether the content needs to be adjusted. Judge whether or not. Here, the control command is transmitted including different contents for each customer facility 20 and each customer facility 30. The content of each control command confirmed by the adjustment necessity determination unit 123 corresponds to information indicating the degree of simultaneity of start (operation) or stop of each storage battery 21 and each storage battery 31. If multiple storage batteries start or stop at the same time, it may affect the stability of the distribution system and transmission system. Therefore, the adjustment necessity determination unit 123 refers to the distribution system connection information 134, and the content of each control command is a content that simultaneously starts or stops a plurality of storage batteries 21 or storage batteries 31 for each distribution system. Check if it is.

Here, the activation means an operation in which an increase in discharge power or an increase in charge power exceeding a predetermined threshold value occurs in each storage battery 21 or each storage battery 31, for example, a storage battery 21 or a storage battery that has not been charged or discharged. This includes an operation in which 31 starts charging or discharging, an operation in which the charging storage battery 21 or storage battery 31 starts discharging, an operation in which the discharging storage battery 21 or storage battery 31 starts charging, and the like.

Further, the stop means an operation in which each storage battery 21 or each storage battery 31 has a decrease in discharge power or a decrease in charge power exceeding a predetermined threshold value. For example, the charge / discharge storage battery 21 or storage battery 31 Includes an operation of stopping charging or discharging, an operation of the charging storage battery 21 or the storage battery 31 starting discharging, an operation of discharging the discharging storage battery 21 or the storage battery 31 starting charging, and the like.

Further, the adjustment means shifting the start time or stop time so that the plurality of storage batteries 21 and the plurality of storage batteries 31 do not have the same start time or stop time.

The adjustment necessity determination unit 123 confirms the content of each control command, refers to the distribution system connection information 134, and determines the number of storage batteries 21 or storage batteries 31 that are started or stopped at the same time in the same distribution system. If the threshold value is exceeded, or if the power change of the storage battery 21 or the storage battery 31 that is started or stopped at the same time exceeds each predetermined threshold value in the same distribution system, it is determined that the content needs to be adjusted. do.

In the example shown in FIG. 3, the adjustment necessity determination unit 123 determines the necessity of adjustment for each of the distribution system 70-1 and the distribution system 70-2. For example, the adjustment necessity determination unit 123 is among the groups 80-1 of the consumer facilities 20-1 to 20-10 connected to the distribution system 70-1 at a certain unit planning time or control time. When the number of storage batteries 21 that start or stop at the same time exceeds a predetermined threshold value, it is determined that adjustment is necessary for group 80-1. Alternatively, for example, the adjustment necessity determination unit 123 simultaneously among the groups 80-2 of the consumer facilities 20-11 to 20-20 connected to the distribution system 70-2 at a certain unit planning time or control time. When the number of storage batteries 21 to be started or stopped exceeds a predetermined threshold value, it is determined that adjustment is necessary for group 80-2.

The start / stop time adjustment unit 124 groups (groups) the distribution systems that are determined to require adjustment according to the determination result of the adjustment necessity determination unit 123, and each control content. The start or stop time (timing) of each storage battery 21 or each storage battery 31 in the above is adjusted. That is, each consumer facility 20 having a storage battery 21 connected to the same distribution system and being started or stopped at the same time is divided into two or more groups, and each control command is set so that the start or stop time is shifted by a predetermined time for each group. Set the start time or stop time in. It is assumed that the number of groups is two or more. The number of groups is the number of steps of the time difference at the time of start-up or stop. The number of consumer facilities belonging to each group is one or more. The predetermined time (time difference) can be, for example, several tens of seconds to several minutes. Each control command adjusted by the start / stop time adjusting unit 124 as necessary is transmitted from the power control unit 121 to each consumer facility 20 and each consumer facility 30.

For example, in the example shown in FIG. 3, when the storage batteries 21 are started or stopped all at once in the customer facilities 20-1 to 20-20, the adjustment necessity determination unit 123 determines the distribution system 70-1 and the distribution system. When it is determined that adjustment is necessary for both 70-2, the start / stop time adjustment unit 124 sets the group 80-1 of the consumer facilities 20-1 to 20-10 connected to the distribution system 70-1. It is divided into two groups, group 80-1-A and group 80-1-B. In the example shown in FIG. 3, the consumer facilities 20-1 to 20-5 are assigned to the group 80-1-A, and the consumer facilities 20-6 to 20-10 are assigned to the group 80-1-B. ing. Further, the start / stop time adjustment unit 124 sets the group 80-2 of the consumer facilities 20-11 to 20-20 connected to the distribution system 70-2 to the group 80-2-A and the group 80-2-B. It is divided into two groups. In the example shown in FIG. 3, the consumer facilities 20-11 to 20-15 are assigned to the group 80-2-A, and the consumer facilities 20-16 to 20-20 are assigned to the group 80-2-B. ing. Further, the start / stop time adjustment unit 124 may be used, for example, for the customer facilities 20-1 to 20-5 belonging to the group 80-1-A and the customer facilities 20-11 to 20- belonging to the group 80-2-A. Each control command is set so that the start or stop times of 15 are the same (or each control command is not changed as it is created by the power control unit 121). Further, the start / stop time adjustment unit 124 is, for example, the customer facilities 20-6 to 20-10 belonging to the group 80-1-B and the customer facilities 20-16 to 20- belonging to the group 80-2-B. The start or stop time of 20 is the same, and the start or stop of each customer facility 20-1 to 20-5 and 20-11 to 20-15 belonging to groups 80-1-A and 80-2-A. Each control command is set so as to be delayed by a predetermined time from the time. In each customer facility 20, in the unit planning time or control time, first, in group 80-1-A and group 80-2-A, according to each control command adjusted by the start / stop time adjustment unit 124. Each storage battery 21 included in the customer facilities 20-1 to 20-5 and 20-11 to 20-15 to which the facility belongs starts up (starts or stops), and after a predetermined time, groups 80-1-B and 80-2-B Each storage battery 21 included in the consumer facilities 20-6 to 20-10 and 20-16 to 20-20 belonging to the above is started up (started or stopped).

In the example shown in FIG. 3, for example, when considering the influence on the power transmission system 7-1, for example, group 80-1-A, group 80-2-A, group 80-1-B, group 80- Each storage battery 21 may be started up at predetermined time intervals in the order of 2-B.

Next, an operation example of the control device 12 shown in FIG. 2 will be described with reference to FIG. FIG. 5 is a flowchart showing an operation example of the control device 12 shown in FIG. When the control device 12 starts the process shown in FIG. 5, for example, after the control device 12 is activated, the adjustment necessity determination unit 123 determines whether or not the control command has been created or updated by the power control unit 121 (step S1). When it is determined by the power control unit 121 that the control command has been created or updated (“YES” in step S1), the adjustment necessity determination unit 123 sends each control command to the distribution system during the unit planning time or control time. Each time, it is determined whether or not the content is such that a storage battery exceeding a predetermined threshold value that starts or stops at the same time is generated (step S2). For example, if one of the distribution systems generates a number of storage batteries that start or stop at the same time that exceeds a predetermined threshold, or if any of the distribution systems generates a power change that exceeds a predetermined threshold. When the content is such that a storage battery that starts or stops at the same time is generated, the adjustment necessity determination unit 123 generates a storage battery that exceeds a predetermined threshold value at which each control command starts or stops at the same time for each distribution system. It is determined that the content is to be to be performed (“YES” in step S2).

When the adjustment necessity determination unit 123 determines that each control command generates a storage battery exceeding a predetermined threshold value that starts or stops at the same time for each distribution system (“YES” in step S2). , The start / stop time adjustment unit 124 adjusts the start or stop time in each control command by grouping each distribution system determined to exceed the threshold value (step S3).

When the adjustment necessity determination unit 123 determines that each control command does not generate a storage battery exceeding a predetermined threshold value for simultaneous start or stop for each distribution system (“NO” in step S2). Alternatively, when the start / stop time adjusting unit 124 adjusts the start or stop time in each control command by grouping each distribution system determined to exceed the threshold value (step S3), the control device 12 determines. The process shown in FIG. 5 is temporarily terminated, and the process shown in FIG. 5 is started again.

According to the operation example shown in FIG. 5, for each storage battery connected to the same power transmission and distribution system, each storage battery to be started (operated) or stopped is not operated at once, but is gradually started up at different timings. Can be done. Therefore, it is possible to reduce the influence on the power transmission and distribution system when starting or stopping a plurality of storage batteries.

In the operation example described with reference to FIG. 5 and the like, when it is determined by the adjustment necessity determination unit 123 that the number of storage batteries and the amount of power of each storage battery that are started or stopped at the same time exceed a predetermined threshold value. , The start / stop time adjustment unit 124 is performing the adjustment because the adjustment is necessary, but the determination of the necessity of the adjustment may be omitted. That is, when there are a plurality of storage batteries that start or stop at the same time regardless of the distribution system (or when there are a plurality of storage batteries for each distribution system), the start / stop time adjustment unit 124 does not determine the necessity based on the number or power. , The time for starting or stopping a plurality of storage batteries may be adjusted to be staggered. In this case, the process of determining the necessity becomes simple. However, if it is possible to judge the necessity and the effect is small without adjustment, by starting up each storage battery all at once, the power supply and demand adjustment action by charging and discharging from each storage battery can be performed. The responsiveness can be enhanced.

Further, in the operation example described with reference to FIG. 5 and the like, grouping is performed according to the connection position of each consumer facility to the distribution system or the power transmission system, and each storage battery is started up separately for each group. However, for example, the method of grouping is not limited to this. For example, it is divided into groups according to the voltage monitoring result indicating each voltage at multiple points of the power transmission and distribution system (transmission system and distribution system). If there is, it may be started from the group having a high voltage step by step. In this case, the measurement result of each voltage in the power management device 10 can be obtained by measuring the voltage in the vicinity of the service port of the drop line at each consumer facility, or in cooperation with the power transmission and distribution business operator, by the power transmission and distribution business operator. It may be obtained from the monitoring result.

As described above, according to the present embodiment, the power management device 10 is a device that manages the power supply and demand in the plurality of consumer facilities 20 or 30 having the storage batteries 21 or 31, respectively, and is the device of the plurality of storage batteries 2 When starting or stopping the above, divide multiple storage batteries to start or stop into two or more groups, and adjust the start or stop timing so that each group has a time difference. Start / stop time adjustment A unit 124 (adjustment unit) is provided. According to this configuration, since a plurality of storage batteries can be started or stopped with a time lag, it is possible to reduce the influence on the power transmission and distribution system when starting or stopping the plurality of storage batteries.

Further, the start / stop time adjustment unit 124 (adjustment unit) groups the customer facilities 20 or 30 according to the connection position to the distribution system 70-1 or 70-2 or the power transmission system 7-1. be able to. In this case, for example, it is possible to manage the number of storage batteries and the electric power that are started or stopped at the same time in the same system.

Further, the start / stop time adjustment unit 124 (adjustment unit) responds to the voltage measurement result of the distribution system 70-1 or 70-2 or the power transmission system 7-1 to which each customer facility 20 or 30 is connected. , Can be grouped. In this case, the influence on the stability of the voltage in the system can be reduced.

An adjustment necessity determination unit 123 (judgment unit) for determining the necessity of adjustment by the start / stop time adjustment unit 124 (adjustment unit) is provided, and the start / stop time adjustment unit 124 (adjustment unit) determines the adjustment necessity. When the unit 123 (determination unit) determines that the adjustment is necessary, the adjustment can be made. According to this configuration, it is possible to improve the responsiveness of the supply and demand adjustment of electric power by the storage battery.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and the design and the like within a range not deviating from the gist of the present invention are also included.

1: Storage battery group operation system, 10: Power management device, 20, 30: Consumer facility, 21, 31: Storage battery, 12: Control device, 121: Power control unit, 122: Receiver unit, 123: Adjustment necessity judgment unit (Judgment unit), 124: Start / stop time adjustment unit (adjustment unit)

Claims (5)

It is a device that manages the supply and demand of electric power in multiple consumer facilities, each of which has a storage battery.
When starting or stopping two or more of the plurality of storage batteries, there are a plurality of target storage batteries for performing at least one of the start and stop operations, and the plurality of the storage batteries are grouped into two or more, and the said It has an adjustment unit that adjusts the start or stop timing so that the operation is performed with a time lag so that the timing at which the operation is performed differs for each group.
According to the voltage monitoring result indicating each voltage at a plurality of points of the power transmission and distribution system that the adjusting unit transmits to the plurality of consumer facilities and the connection position of each customer facility to the power transmission and distribution system. A power management device that divides into groups and starts up from the group with the lower voltage when the operation is discharge, and starts up from the group with the higher voltage when the operation is charging. The power management device according to claim 1, wherein the coordinating unit performs the grouping according to the connection position of each consumer facility to the distribution system or the power transmission system. The power management device according to claim 1, wherein the adjusting unit performs the grouping according to the measurement result of the voltage of the distribution system or the power transmission system to which the consumer facilities are connected. A judgment unit for determining the necessity of the adjustment by the adjustment unit is further provided.
The adjusting unit makes the adjustment when the determining unit determines that the adjustment is necessary.
The power management device according to any one of claims 1 to 3. It is a method of managing the supply and demand of electricity in multiple consumer facilities, each of which has a storage battery.
When two or more of the plurality of storage batteries are started or stopped by the adjusting unit, there are a plurality of target storage batteries that perform at least one of the start and stop operations, and the plurality of the storage batteries are grouped into two or more. The start or stop timing is adjusted so that the operation is performed with a time lag so that the timing at which the operation is performed is different for each group.
In the process of making the adjustment, the voltage monitoring result indicating each voltage at a plurality of points of the power transmission and distribution system to transmit power to the plurality of consumer facilities and the connection position of each customer facility to the power transmission and distribution system are obtained. A power management method in which the power is divided into groups according to the situation, and when the operation is discharge, the power is started from the group with the lower voltage, and when the operation is the charge, the power is started from the group with the higher voltage.

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