WO2018225455A1

WO2018225455A1 - Power management system, power storage system, transmission method, and program

Info

Publication number: WO2018225455A1
Application number: PCT/JP2018/018573
Authority: WO
Inventors: 篠崎　聡; 工藤　貴弘; 杉本　敏
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2017-06-07
Filing date: 2018-05-14
Publication date: 2018-12-13
Also published as: JP2018207707A

Abstract

According to the present invention, a power management system server 14 is connected to a power system and controls the operation of a power storage system installed in a power-consuming residence. A generation unit 504 generates information about the operation state of the power storage system. A transmission unit 506 transmits, to the power storage system, the information generated in the generation unit 504. The information about the operation state of the power storage system includes: a first state in which power is prevented from being discharged from the power storage system when the power is sold from the power-consuming residence to the power system; or a second state in which power is allowed to be discharged from the power storage system when the power is sold from the power-consuming residence to the power system.

Description

Power management system, power storage system, transmission method, program

The present disclosure relates to a power management system, a power storage system, a transmission method, and a program for managing power.

A power management system including a control device that controls equipment installed in a consumer has been proposed. Devices include, for example, distributed power sources such as solar cells, storage batteries, and fuel cells, and home appliances. Such a control device is connected to a host smart server. The smart server comprehensively manages a plurality of consumers (see, for example, Patent Document 1).

JP 2014-33591 A

In the consumer, when the solar cell system and the power storage system are connected to the power system, if the power from the solar cell system is sold to the power system, the discharge from the power storage system is generally stopped. Therefore, a message for instructing the power storage system to discharge when power is sold to the power system is not defined. In such a situation, even if an instruction to increase the amount of power sold is received from a host server, the server of the power management system cannot control the power storage system so as to increase the amount of power sold.

The present disclosure has been made in view of such a situation, and an object thereof is to provide a technique for diversifying the operation state of the power storage system.

In order to solve the above-described problem, a power management system according to an aspect of the present disclosure is a power management system that is connected to a power system and controls the operation of a power storage system installed in a consumer. A generating unit that generates information on the information, and a transmitting unit that transmits the information generated in the generating unit to the power storage system. The information regarding the operating state of the power storage system is the first state in which discharging from the power storage system is prohibited when power is sold from the consumer to the power system, or when power is sold from the consumer to the power system. A second state in which discharging from the power storage system is permitted is included.

Another aspect of the present disclosure is a power storage system. This power storage system is a power storage system connected to an electric power system and installed at a consumer, and operates based on information received at the receiving unit and information received at the receiving unit. A processing unit. The information regarding the operating state of the power storage system is the first state in which discharging from the power storage system is prohibited when power is sold from the customer to the power system, or when power is sold from the customer to the power system. Includes a second state in which discharge from the power storage system is permitted.

Still another aspect of the present disclosure is a transmission method. This method is a transmission method in a power management system that is connected to an electric power system and controls the operation of a power storage system installed in a consumer. The method includes a step of generating information on an operation state of the power storage system, and the generated information And transmitting to the power storage system. The information regarding the operating state of the power storage system is the first state in which discharging from the power storage system is prohibited when power is sold from the consumer to the power system, or when power is sold from the consumer to the power system. A second state in which discharging from the power storage system is permitted is included.

It should be noted that any combination of the above-described constituent elements, the expression of the present disclosure converted between methods, apparatuses, systems, computer programs, or recording media on which the computer programs are recorded are also effective as an aspect of the present disclosure. is there.

According to the present disclosure, the operation state of the power storage system can be diversified.

It is a figure which shows the structure of the VPP system which concerns on an Example. It is a figure which shows the structure of the consumer of FIG. It is a figure which shows the structure of the power management system server of FIG. 2, a smart meter, and a control apparatus. It is a figure which shows the format of the message used in the power management system server of FIG. FIGS. 5A to 5C are diagrams showing an outline of the operation of the power storage system of FIG. FIGS. 6A to 6D are diagrams showing various arrangements of the power management system server in the VPP system of FIG. It is a sequence diagram which shows the instruction | indication procedure in the VPP system of FIG. FIGS. 8A and 8B are flowcharts showing a procedure for selecting an operation state in the power management system server of FIG. It is a flowchart which shows the process sequence in the control apparatus of FIG.

DETAILED DESCRIPTION Before an embodiment of the present disclosure is specifically described, an outline of the embodiment will be described. The embodiment relates to VPP (Virtual Power Plant) that integrates and controls devices such as scattered small-scale photovoltaic power generation systems, power storage systems, fuel cell systems, and the like, and power demand control. The VPP controls devices such as a photovoltaic power generation system, a power storage system, and a fuel cell system via a network, thereby causing them to function as a single power plant. Here, devices such as a photovoltaic power generation system, a power storage system, and a fuel cell system are installed in each consumer. The consumer is a facility that is supplied with electric power from an electric power company or the like, such as a house, an office, a store, a factory, or a park. Such consumer equipment is controlled by a power management system. The power management system discharges the power storage system during a time period when the amount of power consumed by the consumer is large, or charges the power storage system at night when the electricity charge of the power system is low.

Multiple power management systems are connected to the group management system. The group management system is also connected to a host system of a power retailer. The operator who manages the group management system has a contract with the power retailer, and the host system outputs a request corresponding to the contract to the group management system. The group management system instructs each of the plurality of power management systems to control power to be sold to the power retailer in response to a request from the host system. For example, the group management system requests the power management system to perform control so as to suppress the power purchase in the consumer when the power generated at the power plant is tight.

In a consumer, when the solar cell system and the power storage system are connected to the power system, if the power from the solar cell system is sold to the power system, the power storage system is used to prevent a decrease in the selling price due to double power generation. The discharge from is generally stopped. For this reason, in the message transmitted from the power management system to the power storage system, there is no need for a message for instructing the power storage system to discharge when power is sold to the power system, and such a message is defined. Absent. In such a situation, when the power management system receives an instruction to increase the amount of power sold from the group management system, the power management system cannot discharge the power storage system and cannot meet the request of the group management system. On the other hand, even if the power selling price decreases due to double power generation, there is a case where a contract is made for the consumer to discharge the power storage system in response to a request from the group management system.

In order to cope with such a situation, the power management system according to the present embodiment defines three types of states as the operation state of the power storage system during power sale. The three types of states are indicated from the first state to the third state. The first state is a state in which discharge is prohibited during power sale, the second state is a state in which discharge is allowed only during consumption of power during power sale, and the third state is unlimited during power sale. This is a state in which discharge is permitted. Here, the first state corresponds to the operation so far, and the second state corresponds to double power generation. The power management system grasps that power is being sold by receiving information on the current state from each of the devices provided in the consumer, for example, a smart meter and a power storage system. Under the circumstances, in response to a request from the host system and the group management system, the power management system transmits information for instructing to change the first state to the second state or the third state to the power storage system. The power storage system operates by changing the first state to the second state or the third state according to the received information.

FIG. 1 shows a configuration of a VPP system 100 according to the embodiment. The VPP system 100 is generically referred to as a first group management system server 12a, a second group management system server 12b, an Mth group management system server 12m, and a power management system server 14 collectively referred to as a host system server 10 and a group management system server 12. First power management system server 14a, second power management system server 14b, and Nth power management system server 14n. Here, the first power management system server 14a is installed in the first consumer 16a, the second power management system server 14b is installed in the second consumer 16b, and the Nth power management system server 14n is the Nth consumer 16n. The first consumer 16a, the second consumer 16b, and the Nth consumer 16n are collectively referred to as the consumer 16. The number of group management system servers 12 is not limited to “M”, and the number of power management system servers 14 and consumers 16 is not limited to “N”.

The consumer 16 is, for example, a detached house, an apartment house such as a condominium, a store such as a convenience store or a supermarket, a commercial facility such as a building, and a factory. It is a facility. The consumer 16 is installed with devices such as an air conditioner (air conditioner), a television receiver (television), a lighting device, a power storage system, and a heat pump water heater. These devices are connected to an electric power system of an electric power company or the like, thereby receiving commercial power and consuming electric power. As the device, a device that is assumed to have a relatively large reduction in power consumption is useful, but a device that is assumed to have a large reduction amount may be used. The device may include a renewable energy power generation device such as a solar cell system or a fuel cell system.

The power management system server 14 is a computer for executing processing of the power management system, and is installed in the customer 16, for example. The power management system server 14 has a function as, for example, a HEMS (Home Energy Management System) controller. Therefore, the power management system server 14 can communicate with various devices in the customer 16 by HAN (Home Area Network), and controls these devices. The power management system server 14 controls the operation of the power storage system, for example, discharging and charging. Further, the power management system server 14 may control the interconnection between the equipment installed in the consumer 16 and the power system. The power management system server 14 disconnects the device and the power system at the time of a power failure, and connects the device and the power system at the time of power recovery.

The group management system server 12 is a computer for executing processing of the group management system. The group management system server 12 manages the plurality of power management system servers 14 by connecting the plurality of power management system servers 14. As a result, the group management system server 12 comprehensively manages a plurality of devices connected to each of the plurality of power management system servers 14. The plurality of group management system servers 12 are connected to the host system server 10. The host system server 10 is a computer for executing processing of a business operator such as a power retail business operator. As described above, there is a contract between the power retailer and the group management system provider, and the upper system server 10 outputs a request corresponding to the contract to the group management system server 12. One group management system server 12 may be connected to a plurality of higher system servers 10.

With such a configuration, when the power demand of the entire customer group managed by the host system is tight, the group management system server 12 consumes the electric power discharged from the power storage system within the consumer 16 or within the consumer 16 The power management system server 14 is controlled so as to suppress power consumption in the system. Further, when the power generation of the entire customer group managed by the host system increases and the supply exceeds the demand, the group management system server 12 increases the charge to the power storage system or increases the demand in the customer 16. The power management system server 14 is controlled.

FIG. 2 shows the configuration of the customer 16. The customer 16 is provided with a power system 30, a smart meter 32, a distribution board 34, a load 36, a solar cell system 38, a power storage system 40, and a power management system server 14. The solar cell system 38 includes a PV (Photovoltaics) 200, a PV DC (Direct Current) / DC202, and a PV DC / AC (Alternating Current) 204, and the power storage system 40 includes an SB (Storage Battery) 210, an SB. DC / DC 212 for operation, bidirectional DC / AC inverter 214, and control device 216. Further, the group management system server 12 is connected to the power management system server 14 via the network 18.

The smart meter 32 is connected to the power system 30 and is a digital watt-hour meter. The smart meter 32 can measure the power amount of the tidal current entering from the power system 30 and the power amount of the reverse power flowing out to the power system 30. The smart meter 32 has a communication function and can communicate with the power management system server 14.

PV200 is a solar cell and a renewable energy power generation device. The PV 200 uses the photovoltaic effect to convert light energy directly into electric power. As the solar cell, a silicon solar cell, a solar cell made of a compound semiconductor, a dye-sensitized type (organic solar cell), or the like is used. The PV 200 is connected to the PV DC / DC 202 and outputs the generated DC power to the PV DC / DC 202.

PV DC / DC 202 is a DC-DC converter, which converts DC power output from PV 200 into DC power having a desired voltage value, and outputs the converted DC power to PV DC / AC 204. The PV DC / DC 202 is constituted by, for example, a boost chopper. The PV DC / DC 202 is controlled by MPPT (Maximum Power Point Tracking) so that the output power of the PV 200 is maximized. The PV DC / AC 204 is a DC-AC inverter, converts the DC power output from the PV DC / DC 202 into AC power, and outputs the AC power to the distribution line 42.

The distribution line 42 connects the smart meter 32 and the distribution board 34, and branches from the intersection P between them to connect the DC / AC 204 for PV. The distribution board 34 is connected to the distribution line 42 and to the load 36. The distribution board 34 supplies power to the load 36. The load 36 is a device that consumes electric power supplied via the distribution line 42. The load 36 includes devices such as a refrigerator, an air conditioner, and lighting. Here, one load 36 is connected to the distribution board 34, but a plurality of loads 36 may be connected to the distribution board 34.

SB210 is a storage battery capable of charging and discharging electric power, and includes a lithium ion storage battery, a nickel hydride storage battery, a lead storage battery, an electric double layer capacitor, a lithium ion capacitor, and the like. The SB 210 is connected to the DC / DC 212 for SB. The SB DC / DC 212 is a DC-DC converter, and performs conversion between the DC power on the SB 210 side and the DC power on the bidirectional DC / AC inverter 214 side.

The bidirectional DC / AC inverter 214 is connected between the SB DC / DC 212 and the distribution board 34. The bidirectional DC / AC inverter 214 converts AC power from the distribution board 34 into DC power, and outputs the converted DC power to the SB DC / DC 212. The bidirectional DC / AC inverter 214 converts the DC power from the SB DC / DC 212 into AC power and outputs the converted AC power to the distribution board 34. That is, the SB 210 is charged and discharged by the bidirectional DC / AC inverter 214. Such control of the bidirectional DC / AC inverter 214 is performed by the control device 216. Control by the control device 216 will be described later. Here, the PV 200, the PV DC / DC 202, and the PV DC / AC 204 may be integrally formed, and even in this case, this is referred to as a solar cell system 38. In addition, the SB 210, the SB DC / DC 212, the bidirectional DC / AC inverter 214, and the control device 216 may be stored in one housing. Even in this case, this is referred to as the power storage system 40.

The first measurement point 220 is arranged between the smart meter 32 and the intersection P in the distribution line 42. The first measurement point 220 is a sensor that measures the power value of the passing power. Here, the passing electric power includes electric power from the intersection P toward the smart meter 32 and electric power from the smart meter 32 toward the intersection P. The former corresponds to power sales and the latter corresponds to power purchases. The first measurement point 220 may measure only the power value corresponding to the power sale. Moreover, since a well-known technique should just be used for the measurement of an electric power value, description is abbreviate | omitted here. Such a first measurement point 220 can be said to be a measurement point capable of measuring the power sold to the power system 30. The first measurement point 220 outputs the measured power value to the control device 216.

The second measurement point 222 is arranged between the intersection P and the distribution board 34 in the distribution line 42. The second measurement point 222 is a sensor that measures the power value of the electric power that passes through in the same manner as the first measurement point 220. Here again, the passing power includes the power from the distribution board 34 toward the intersection P and the power from the intersection P toward the distribution board 34. The second measurement point 222 may measure only the power value from the intersection P toward the distribution board 34. Such a second measurement point 222 can be said to be a measurement point at which the power consumed in the load 36 and the power storage system 40 can be measured. The second measurement point 222 outputs the measured power value to the control device 216.

The power management system server 14 is connected to the smart meter 32, the solar cell system 38, and the power storage system 40 via a network such as HAN, and can communicate with each other. Hereinafter, the description of the communication between the power management system server 14 and the solar cell system 38 is omitted. The power management system server 14 is also connected to the group management system server 12 via the network 18. In order to explain the processing and communication in the power management system server 14, FIG. 3 is used here.

FIG. 3 shows the configuration of the power management system server 14, the smart meter 32, and the control device 216. The power management system server 14 includes a service cooperation unit 300 and a control unit 302, and the control unit 302 includes a reception unit 500, a processing unit 502, a generation unit 504, and a transmission unit 506. The control device 216 includes a reception unit 400, a processing unit 402, a generation unit 404, a transmission unit 406, and an acquisition unit 408.

The service cooperation unit 300 executes processing for realizing bidirectional cooperation with a service such as VPP. Further, the service cooperation unit 300 provides the service with the device profile registered in the power management system server 14. In order to execute processing such as these with the group management system, the communication unit 508 communicates with a group management system server 12 (not shown). A receiving unit (not shown) in the communication unit 508 receives a message including a request from the group management system server 12 which is an external server installed outside the customer 16 in which the power storage system 40 is installed. The request is, for example, an increase or decrease in demand at the customer 16. The service cooperation unit 300 outputs the request received by the communication unit 508 to the control unit 302.

The control unit 302 executes processing for realizing cooperation with devices installed in the customer 16, for example, the smart meter 32, the solar cell system 38, and the power storage system 40. Through the cooperation, the control unit 302 collects information from the device and controls the device. Here, communication between the control unit 302 and each device is performed by a method according to a predetermined protocol. The predetermined protocol is, for example, “ECHONET Lite” or “ECHONET”. However, the predetermined protocol is not limited to these.

Here, three kinds of states from the first state to the third state are defined as the operation states of the power storage system 40 with which the control unit 302 communicates. The first state is a state in which discharging from the power storage system 40 is prohibited when selling power to the power system 30. As an initial state, the power storage system 40 is operating in the first state. The second state is a state in which discharging from the power storage system 40 is permitted in the range of the amount of power consumed by the load 36 connected to the power storage system 40. The third state is a state in which the power storage system 40 is allowed to discharge more than the amount of power consumed by the load 36 connected to the power storage system 40. The operation of the power storage system 40 corresponding to the first state to the third state will be described later.

The receiving unit 500 in the control unit 302 receives a value from the smart meter 32, for example, a power sale amount or a power purchase amount, and also receives a power storage amount from the control device 216. These receptions are made periodically, for example, once every 30 minutes. The processing unit 502 derives a demand amount that can be increased or decreased by the customer 16 based on the value from the smart meter 32 and the amount of stored electricity. Since a known technique may be used for deriving such a demand amount, a description thereof is omitted here.

When the control unit 302 receives a request from the service cooperation unit 300, for example, a request for a reduction in demand, the processing unit 502 determines switching from the first state to the second state or the third state. Here, whether the state is the second state or the third state is determined by a contract made in advance. If the requested amount of reduction in demand is within the range of demand that can be reduced, the processing unit 502 determines to maintain the first state, and the amount of reduction in demand that is requested can be reduced. If the amount is out of the range, the switching from the first state to the second state or the third state may be determined.

The generation unit 504 generates a message regarding the operation state of the power storage system 40. FIG. 4 shows a message format used in the power management system server 14. In the message, a data field is arranged after the message type field. The message type field indicates the type of message, and here an operation state instruction is shown. The data field indicates data to be notified, and here, one of the first state to the third state is indicated. Returning to FIG. As described above, the generation unit 504 generates an operation state instruction message of the power storage system 40 based on the request received by the communication unit 508. The transmission unit 506 transmits an operation state instruction message of the power storage system 40 to the control device 216.

The receiving unit 400 of the control device 216 receives an operation state instruction message of the power storage system 40. The processing unit 402 recognizes that it is an operation state instruction based on the message type field, and changes the operation state from the first state to the second state or the third state based on the data field. Recognize The processing unit 402 operates to control the power storage system 40 based on the recognized operating state. In order to explain the operation, FIGS. 5A to 5C are used here.

FIGS. 5A to 5C show an outline of the operation of the power storage system 40. FIG. As illustrated, the power system 30, the smart meter 32, the distribution board 34, the load 36, the solar cell system 38, and the power storage system 40 are connected in the same manner as in FIG. FIG. 5A shows an outline of the operation when the operation state indicates the first state. As described above, the first state is a state in which discharging from the power storage system 40 is prohibited when selling power to the power system 30. The processing unit 402 stops discharging from the bidirectional DC / AC inverter 214 in the first state. By stopping the discharge, the electric power A1 from the solar cell system 38 is branched at the intersection P, the electric power A2 is directed to the distribution board 34, and the electric power A3 is directed to the smart meter 32. The electric power A2 is consumed in the load 36. The first measurement point 220 measures the electric power A3 and outputs the measurement result to the control device 216. The acquisition unit 408 of the control device 216 acquires the measurement result. The processing unit 402 continues to stop discharging from the bidirectional DC / AC inverter 214 when the electric power A3 is directed from the intersection P to the smart meter 32 in the measurement result at the first measurement point 220. When the electric power A3 is directed from the intersection P toward the smart meter 32, this corresponds to a state where electric power is sold to the electric power system 30.

FIG. 5 (b) shows an outline of the operation when the operation state indicates the second state. As described above, the second state is a state in which discharging from the power storage system 40 is permitted within the range of the amount of power consumed by the load 36 connected to the power storage system 40. The processing unit 402 causes the bidirectional DC / AC inverter 214 to perform discharging in the second state. Due to the discharge, the electric power B <b> 1 from the power storage system 40 goes to the load 36 through the distribution board 34. On the other hand, the electric power A1 from the solar cell system 38 is branched at the intersection P, the electric power A4 is directed to the distribution board 34, and the electric power A5 is directed to the smart meter 32. Here, the electric power A4 corresponds to the amount of electric power consumed by the load 36 that is insufficient with only the electric power B1. Therefore, the electric power A4 is smaller than the electric power A2 in FIG. As a result, the electric power A5 becomes larger than the electric power A3 in FIG.

The second measurement point 222 measures the electric power A4 and outputs the measurement result to the control device 216. The acquisition unit 408 of the control device 216 acquires the measurement result. In the measurement result at the second measurement point 222, the processing unit 402 causes the power A4 from the intersection P to the distribution board 34 to be zero, or the power A4 to travel from the intersection P to the distribution board 34. The bidirectional DC / AC inverter 214 is caused to discharge. On the other hand, in the measurement result at the second measurement point 222, when the power is moving from the distribution board 34 toward the intersection P, the processing unit 402 causes the bidirectional DC / DC to be directed from the intersection P to the distribution board 34. The amount of discharge from the AC inverter 214 is reduced. When the electric power A4 is directed from the intersection P toward the distribution board 34, this corresponds to a state in which the electric power discharged from the power storage system 40 is consumed only by the load 36 without going to the electric power system 30.

FIG. 5C shows an outline of the operation when the operation state indicates the third state. As described above, the third state is a state in which the power storage system 40 is allowed to discharge more than the amount of power consumed by the load 36 connected to the power storage system 40. Therefore, the processing unit 402 causes the bidirectional DC / AC inverter 214 to perform discharge regardless of the measurement results of the first measurement point 220 and the second measurement point 222. The electric power B2 from the power storage system 40 is branched in the distribution board 34, the electric power B3 goes to the load 36, and the electric power B4 goes to the smart meter 32. Since the load 36 operates with the electric power B3, the electric power A1 from the solar cell system 38 goes from the intersection P to the smart meter 32. Therefore, the electric power A1 and the electric power B4 are directed to the electric power system 30.

When the processing is performed in the processing unit 402, the generation unit 404 may generate a message for reporting the processing result to the control unit 302. The format of the message is the same as in FIG. 4, but the processing report is shown in the message type field, and the processing result is shown in the data field. The generation unit 404 outputs a data request message to the transmission unit 406. The transmission unit 406 transmits a processing report message to the control unit 302. The receiving unit 500 of the control unit 302 receives a process report message.

The generation unit 504 may generate a message for requesting the smart meter 32 to notify the power sale amount or the power sale amount in order to grasp whether the power sale is being performed or the power purchase is being performed. The format of the message at that time is the same as in FIG. 4, but the data request indicates the message type field, and the power sale amount or the power purchase amount is indicated in the data field. The generation unit 504 outputs a data request message to the transmission unit 506. The transmission unit 506 transmits a data request message to the smart meter 32.

When the smart meter 32 receives the data request message, the smart meter 32 recognizes that the request is a data request based on the message type field, and should notify the power sale amount or the power purchase amount based on the data field. Recognize The smart meter 32 generates a message for responding to the data request. The format of the message is the same as in FIG. 4, but the data response is shown in the message type field, and the amount of power sold or purchased is shown in the data field. Here, it is assumed that the amount of power sold is shown. The smart meter 32 transmits a data response message to the control unit 302.

The receiving unit 500 of the control unit 302 receives a data response message. The processing unit 502 recognizes that the response is a data response based on the message type field, and acquires the power sale amount based on the data field. As a result, the processing unit 502 recognizes that power is being sold. Following this, the generation unit 504 generates a message for requesting the control device 216 to notify the storage amount of the SB 210 and the like. The format of the message is the same as in FIG. 4, but the message type field indicates the data request, and the data field indicates the type of information to be notified. The generation unit 504 outputs a data request message to the transmission unit 506. The transmission unit 506 transmits a data request message to the control device 216.

The receiving unit 400 of the control device 216 receives a data request message. The processing unit 402 recognizes that the data request is based on the message type field, and recognizes that the requested information should be notified based on the data field. Following this, the generation unit 404 generates a message for responding to the data request. The message format is the same as in FIG. 4, but the data response is shown in the message type field, and information such as the amount of electricity stored in the SB 210 is shown in the data field. This information is acquired by the processing unit 402. The generation unit 404 outputs a data response message to the transmission unit 406. The transmission unit 406 transmits a data response message to the control unit 302.

The receiving unit 500 of the control unit 302 receives a data response message. The processing unit 502 recognizes that the response is a data response based on the message type field, and acquires information such as the storage amount of the SB 210 based on the data field. As a result of these processes, the processing unit 502 receives a request for an increase in the amount of electric power sold from the service cooperation unit 300 and then grasps that the electric power is being sold, and grasps information such as the amount of electric power sold and the amount of electricity stored in the SB 210. To do.

The subject of the apparatus, system, or method in the present disclosure includes a computer. When the computer executes the program, the main function of the apparatus, system, or method according to the present disclosure is realized. The computer includes a processor that operates according to a program as a main hardware configuration. The processor may be of any type as long as the function can be realized by executing the program. The processor includes one or a plurality of 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 provided on a plurality of chips. The plurality of chips may be integrated into one device, or may be provided in a plurality of devices. The program is recorded on a non-transitory recording medium such as a ROM, an optical disk, or a hard disk drive that can be read by a computer. The program may be stored in advance in a recording medium, or may be supplied to the recording medium via a wide area communication network including the Internet.

Until now, it is assumed that the power management system server 14 is located in the customer 16. However, the arrangement of the power management system server 14 is not limited to this. Here, various arrangements of the power management system server 14 will be described. FIGS. 6A to 6D show various arrangements of the power management system server 14 in the VPP system 100. FIG. FIG. 6A shows a case where the power management system server 14 is arranged in the customer 16 and is the same as before. In FIG. 6B, the service cooperation unit 300 and the control unit 302 of the power management system server 14 are configured as separate devices, and only the control unit 302 is arranged in the customer 16. This is a case where it is arranged outside the house 16.

FIG. 6C shows a case where the power management system server 14 is arranged outside the consumer 16 and a GW (Gateway) 20 is arranged in the consumer 16. Here, the power management system server 14 and the GW 20 are connected, and a device (not shown) is connected to the GW 20. FIG. 6D shows a case where the function of the power management system server 14 is included in the group management system server 12 and the GW 20 is arranged at the customer 16. Here, the group management system server 12 and the GW 20 are connected, and a device (not shown) is connected to the GW 20.

The operation of the VPP system 100 configured as above will be described. FIG. 7 is a sequence diagram showing an instruction procedure in the VPP system 100. The smart meter 32 transmits the value of the smart meter 32 to the power management system server 14 (S10). The power storage system 40 transmits the amount of power storage to the power management system server 14 (S12). The group management system server 12 transmits a demand reduction request to the power management system server 14 (S14). The power management system server 14 transmits an operation state instruction to the power storage system 40 (S16).

FIGS. 8A to 8B are flowcharts showing the operation state selection procedure in the power management system server 14. In FIG. 8A, the processing unit 502 puts the power storage system 40 into the first state (S50), and the service cooperation unit 300 does not receive a demand reduction request from the group management system server 12 (N in S52). ), The processing unit 502 returns to Step 50. If the service cooperation unit 300 receives the demand reduction request from the group management system server 12 (Y in S52), the processing unit 502 sets the power storage system 40 to the second state (S54). If instructed (Y in S56), the process returns to step 54. If not instructed (N in S56), the process returns to step 50.

In FIG. 8 (b), the processing unit 502 puts the power storage system 40 into the first state (S70), and the service cooperation unit 300 does not accept the demand reduction request from the group management system server 12 (N in S72). ), The processing unit 502 returns to Step 70. If the service cooperation unit 300 receives the demand reduction request from the group management system server 12 (Y in S72), the processing unit 502 places the power storage system 40 in the third state (S74). If instructed (Y in S76), the process returns to step 74. If not instructed (N in S76), the process returns to step 70.

FIG. 9 is a flowchart showing a processing procedure in the control device 216. When the received operation state is the first state (Y in S100), the processing unit 402 stops discharging (S102). When the received operation state is not the first state (N in S100) and is in the second state (Y in S104), the processing unit 402 performs discharge so that the direction of power does not become the direction of the power system 30 ( S106). When the state is not the second state (N in S104), the processing unit 402 performs discharge (S108).

According to the present embodiment, the first state in which discharging from the power storage system 40 is prohibited when power is sold to the power system 30, or the power from the power storage system 40 when power is sold to the power system 30. Since the second state permitting discharge is included in the message, the operation state of the power storage system 40 can be diversified. Further, since the first state or the second state is included in the message, the power storage system 40 can be controlled from the power management system server 14. Moreover, the discharge which exceeded the electric energy which the load 36 connected to the 1st state or the load 36 connected to the electrical storage system 40 permits discharge in the 2nd state and the electric power range which the electrical load is connected to the electrical storage system 40 3 is included in the message, the operation state of the power storage system 40 can be diversified. Further, since any one of the first state to the third state is included in the message, the power storage system 40 can be controlled from the power management system server 14. Moreover, since the production | generation part 504 produces | generates the information regarding the operation state of the electrical storage system 40 based on the request | requirement from the group management system server 12 which the communication part 508 received, the request | requirement from the group management system server 12 is received. It can be reflected in 40 operations.

The first state in which discharge from the power storage system 40 is prohibited when power is sold to the power system 30, or the first state where discharge from the power storage system 40 is permitted when power is sold to the power system 30. Since the two states are included in the message, the operation state of the power storage system 40 can be diversified. Further, since the first state or the second state is included in the message, the operation can be performed according to the instruction. Moreover, the discharge which exceeded the electric energy which the load 36 connected to the 1st state or the load 36 connected to the electrical storage system 40 permits discharge in the 2nd state and the electric power range which the electrical load is connected to the electrical storage system 40 Since the message includes the third state that permits the operation, the operation state of the power storage system 40 can be diversified. In addition, since any one of the first state to the third state is included in the message, it can operate according to the instruction. In the first state, the operation is based on the measurement result from the first measurement point 220. In the second state, the operation is based on the measurement result from the second measurement point 222. The operation according to the state can be executed.

The outline of one aspect of the present disclosure is as follows. The power management system server 14 according to an aspect of the present disclosure is a power management system server 14 that is connected to the power system 30 and controls the operation of the power storage system 40 installed in the customer 16. A generation unit 504 that generates information on the transmission, and a transmission unit 506 that transmits information generated by the generation unit 504 to the power storage system 40. The information regarding the operation state of the power storage system 40 is the first state in which discharging from the power storage system 40 is prohibited when power is being sold from the customer 16 to the power grid 30, or the power sale from the customer 16 to the power grid 30. Including a second state in which discharging from the power storage system 40 is permitted.

The second state may be a state in which discharge is permitted within the range of the amount of power consumed by the load 36 connected to the power storage system 40.

The second state may include a third state in which discharge exceeding the amount of power consumed by the load 36 connected to the power storage system 40 is permitted.

The first state is a state in which the power storage system 40 is operated based on the measurement result from the first measurement point 220 that can measure the power sold to the power system 30, and the second state is the power storage system 40. The power storage system 40 may be operated based on the measurement result from the second measurement point 222 that can measure the power consumed by the load 36 and the power storage system 40 connected to the power supply.

The third state can measure the power consumed in the first measurement point 220 that can measure the power sold to the power system 30, the load 36 connected to the power storage system 40, and the power storage system 40. The power storage system 40 may be operated independently of the measurement result from the second measurement point 222.

A communication unit 508 that receives information from the group management system server 12 installed outside the customer 16 may be further provided. The generation unit 504 may generate information regarding the operation state of the power storage system 40 based on the information received by the communication unit 508.

Another aspect of the present disclosure is a power storage system 40. This power storage system 40 is a power storage system 40 that is connected to the power system 30 and installed in the customer 16. The power storage system 40 receives the information related to the operation state of the power storage system 40, and the receiver 400 receives the information. And a processing unit 402 that operates based on the information. The information regarding the operation state of the power storage system 40 is the first state in which discharging from the power storage system 40 is prohibited when selling power from the consumer 16 to the power grid 30 or selling from the consumer 16 to the power grid 30. A second state in which discharging from the power storage system 40 is permitted when electricity is being performed is included.

The second state may be a state in which discharging of the power storage system 40 is permitted within the range of the amount of power consumed by the load 36 connected to the power storage system 40.

The second state may include a third state in which discharge of the power storage system 40 is permitted exceeding the amount of power consumed by the load 36 connected to the power storage system 40.

When the information received by the receiving unit 400 indicates the first state, the processing unit 402 operates based on a measurement result from the first measurement point 220 that can measure the power sold to the power system 30. When the information received by the receiving unit 400 indicates the second state, the load 36 connected to the power storage system 40 and the power consumed by the power storage system 40 can be measured from the second measurement point 222 that can be measured. You may operate based on the measurement result.

When the information received by the receiving unit 400 indicates the first state, the processing unit 402 operates based on a measurement result from the first measurement point 220 that can measure the power sold to the power system 30. When the information received by the receiving unit 400 indicates the third state, it is possible to measure the power consumed at the first measurement point 220, the load 36 connected to the power storage system 40, and the power storage system 40. The operation may be performed independently of the measurement result from the second measurement point 222.

Still another aspect of the present disclosure is a transmission method. This method is a transmission method in the power management system server 14 that is connected to the power system 30 and controls the operation of the power storage system 40 installed in the consumer 16, and is a step of generating information related to the operating state of the power storage system 40. And a step of transmitting the generated information to the power storage system 40. The information regarding the operation state of the power storage system 40 is the first state in which discharging from the power storage system 40 is prohibited when power is being sold from the customer 16 to the power grid 30, or the power sale from the customer 16 to the power grid 30. Including a second state in which discharging from the power storage system 40 is permitted.

In the above, this indication was demonstrated based on the Example. This embodiment is an exemplification, and it is understood by those skilled in the art that various modifications can be made to each of those components or combinations of processing processes, and such modifications are also within the scope of the present disclosure. .

In the present embodiment, the first state is defined as a state in which discharging from the power storage system 40 is prohibited when power is sold to the power system 30. Further, the second state is defined as a state in which discharging is permitted within the range of the amount of power consumed by the load 36 connected to the power storage system 40. Furthermore, the third state is defined as a state in which discharge exceeding the amount of power consumed by the load 36 connected to the power storage system 40 is permitted. Further, any one of the first state to the third state specified by such a definition is included in the operation state instruction message. However, the present invention is not limited to this. For example, the first state is based on the measurement result from the first measurement point 220 that can measure the power sold to the power grid 30 when the power grid 30 is sold. May be defined as a state in which the power storage system 40 is operated. In addition, the second state is from the second measurement point 222 that can measure the power consumed in the power storage system 40 and the load 36 connected to the power storage system 40 when selling power to the power system 30. It may be defined as a state in which the power storage system 40 is operated based on the measurement result. Further, in the third state, the information regarding the operation state of the power storage system 40 is independent of the measurement results from the first measurement point 220 and the second measurement point 222 when the power grid 30 is selling power. 40 may be defined as a state of operating. Even in this case, one of the first state to the third state specified by such a definition is included in the operation state instruction message. At that time, the processing unit 402 of the control device 216 executes processing by changing from the first state to the second state or from the first state to the third state in accordance with the message of the operation state instruction. According to this modification, the degree of freedom of configuration can be expanded.

In the present embodiment, the first state to the third state are defined as the operation state. However, not limited to this, for example, only the first state and the second state may be defined as the operation state. At that time, the second state may be the same as the second state so far, or may be the same as the third state so far. According to this modification, processing can be simplified.

In this embodiment, a solar cell system 38 is installed in the consumer 16. However, the present invention is not limited thereto, and for example, a renewable energy power generation device different from the solar cell system 38 may be installed in the consumer 16. An example of such a power generator is a fuel cell system. According to this modification, the degree of freedom of configuration can be improved.

10 host system server, 12 group management system server (external server), 14 power management system server (power management system), 16 consumers, 18 network, 20 GW, 30 power system, 32 smart meter, 34 distribution board, 36 Load, 38 solar cell system, 40 power storage system, 42 distribution lines, 100 VPP system, 200 PV, 202 PV DC / DC, 204 PV DC / AC, 210 SB, 212 SB DC / DC, 214 bidirectional DC / AC inverter, 216 control device, 220 first measurement point, 222 second measurement point, 300 service cooperation unit, 302 control unit, 400 reception unit, 402 processing unit, 404 generation unit, 406 transmission Department, 408 obtaining unit, 500 reception unit, 502 processing unit, 504 generating unit, 506 transmission unit, 508 communication unit (receiving unit).

Claims

A power management system connected to a power system and controlling the operation of a power storage system installed in a consumer,
A generating unit that generates information about an operating state of the power storage system;
A transmission unit that transmits the information generated in the generation unit to the power storage system,
The information related to the operating state of the power storage system is a first state in which discharging from the power storage system is prohibited when selling power from the consumer to the power system, or selling power from the consumer to the power system. A power management system comprising: a second state in which discharge from the power storage system is permitted when the power storage system is performing.
The power management system according to claim 1, wherein the second state is a state in which discharging is permitted within a range of power consumed by a load connected to the power storage system.
The power management system according to claim 1, wherein the second state includes a third state in which discharge exceeding the amount of power consumed by a load connected to the power storage system is permitted.
The first state is a state in which the power storage system is operated based on a measurement result from a first measurement point capable of measuring the power sold to the power system,
The second state is a state in which the power storage system is operated based on a measurement result from a second measurement point capable of measuring power consumed in the power storage system and a load connected to the power storage system. The power management system according to claim 2.
The third state is a first measurement point capable of measuring the power sold to the power system, a load connected to the power storage system, and a power consumed in the power storage system. The power management system according to claim 3, wherein the power storage system is in a state in which the power storage system is operated independently of measurement results from two measurement points.
A receiver that receives information from an external server installed outside the consumer;
6. The power management system according to claim 1, wherein the generation unit generates information related to an operation state of the power storage system based on information received by the reception unit.
A power storage system connected to a power system and installed at a consumer,
A receiving unit for receiving information related to the operating state of the power storage system;
A processing unit that operates based on information received by the receiving unit,
The information regarding the operating state of the power storage system is the first state in which discharging from the power storage system is prohibited when power is being sold from the consumer to the power system, or power selling from the consumer to the power system. A power storage system including a second state in which discharge from the power storage system is permitted when the power storage is performed.
The power storage system according to claim 7, wherein the second state is a state in which discharging of the power storage system is permitted within a range of power consumed by a load connected to the power storage system.
The power storage system according to claim 7, wherein the second state includes a third state in which discharging of the power storage system is permitted exceeding an amount of power consumed by a load connected to the power storage system.
The processing unit operates based on a measurement result from a first measurement point capable of measuring the power sold to the power system when the information received in the reception unit indicates the first state. When the information received by the receiving unit indicates the second state, the measurement result from the second measurement point capable of measuring the power consumed in the load connected to the power storage system and the power storage system is obtained. The power storage system according to claim 8, wherein the power storage system operates based on the above.
The processing unit operates based on a measurement result from a first measurement point capable of measuring the power sold to the power system when the information received in the reception unit indicates the first state. When the information received in the receiving unit indicates a third state, the second measurement capable of measuring the power consumed in the first measurement point, the load connected to the power storage system, and the power storage system. The power storage system according to claim 9, wherein the power storage system operates independently of a measurement result from a measurement point.
A transmission method in a power management system that is connected to a power system and controls the operation of a power storage system installed in a consumer.
Generating information on the operating state of the power storage system;
Transmitting the generated information to the power storage system,
The information related to the operating state of the power storage system is a first state in which discharging from the power storage system is prohibited when selling power from the consumer to the power system, or selling power from the consumer to the power system. A transmission method comprising: a second state in which discharge from the power storage system is permitted when the power storage system is performing.
A program in a power management system that is connected to a power system and controls the operation of a power storage system installed in a consumer.
Generating information on the operating state of the power storage system;
Transmitting the generated information to the power storage system,
The information related to the operating state of the power storage system is a first state in which discharging from the power storage system is prohibited when selling power from the consumer to the power system, or selling power from the consumer to the power system. The program for making a computer perform including the 2nd state which permits discharge from the said electrical storage system when performing.