JP7037583B2 - Power management system, power management server and power management method - Google Patents

Description

The present invention relates to a power management system, a power management server, and a power management method.

In recent years, a technique for sharing one or more power storage devices by a plurality of facilities has been proposed. The storage capacity allocated to the facility is increased by the request for charging obtained from the facility and decreased by the request for discharge obtained from the facility (for example, Patent Document 1).

International Publication No. 2016/136263 Pamphlet

The power management system according to the first feature is the electric power used for charging the shared power storage device shared by the plurality of facilities, the plurality of distributed power sources individually provided in the plurality of facilities, and the shared power storage device. It is equipped with a power management server that manages the charging power output from a plurality of distributed power sources. The power management server applies a price higher than the standard power purchase price as the power purchase price of the charging power. The standard power purchase price is a price applied to power output from the plurality of distributed power sources without going through the shared power storage device.

The power management server according to the second feature manages the charging power output from a plurality of distributed power sources individually provided in the plurality of facilities as the power used for charging the shared power storage device shared by the plurality of facilities. It is equipped with a control unit. The control unit applies a price higher than the standard power purchase price as the power purchase price of the charging power. The standard power purchase price is a price applied to power output from the plurality of distributed power sources without going through the shared power storage device.

The power management method according to the third feature manages the charging power output from a plurality of distributed power sources individually provided in the plurality of facilities as the power used for charging the shared power storage device shared by the plurality of facilities. It includes a step and a step of applying a price higher than the standard power purchase price as the power purchase price of the charged power. The standard power purchase price is a price applied to power output from the plurality of distributed power sources without going through the shared power storage device.

FIG. 1 is a diagram showing a power management system 100 according to an embodiment. FIG. 2 is a diagram showing a power management server 200 according to an embodiment. FIG. 3 is a diagram for explaining the determination of the allocated electric energy according to the embodiment. FIG. 4 is a diagram showing a power management method according to an embodiment. FIG. 5 is a diagram showing a power management method according to an embodiment. FIG. 6 is a diagram showing a power management method according to an embodiment.

At present, most of the power supplied through the power system is supplied from thermal power plants. Due to the growing demand for CO ₂ reduction, it is desired to actively use the distributed power supply installed in the facility as a part of the base load power supply.

However, the timing (time zone or day of the week) when the surplus power output from the distributed power source occurs does not necessarily coincide with the timing when the supply and demand of the power system becomes tight. Therefore, it is preferable to temporarily store the power output from the distributed power source in the power storage device, but not all facilities install the power storage device, and the capacity of the power storage device installed in the facility is also cost effective. It is restricted from the viewpoint of.

The embodiment provides a power management system, a power management server, and a power management method that enable effective use of distributed power sources provided in a facility as part of a base load power source.

Hereinafter, embodiments will be described with reference to the drawings. In the description of the drawings below, the same or similar parts are designated by the same or similar reference numerals.

However, it should be noted that the drawings are schematic and the ratio of each dimension may differ from the actual one. Therefore, the specific dimensions should be determined in consideration of the following explanation. In addition, it goes without saying that there may be a portion where the relations or ratios of the dimensions of the drawings are different from each other.

[Embodiment]
(Power management system)
Hereinafter, the power management system according to the embodiment will be described.

As shown in FIG. 1, the power management system 100 includes a power management server 200, a facility 300, and a shared power storage device 400. In FIG. 1, facility 300A to facility 300C are exemplified as facility 300. The power management system 100 may have a charging station 500 for charging a power storage device provided in an electric vehicle.

Each facility 300 is connected to the power system 110. In the following, the flow of electric power from the electric power system 110 to the facility 300 is referred to as a power flow, and the flow of electric power from the facility 300 to the electric power system 110 is referred to as reverse power flow. The shared power storage device 400 and the charging station 500 are connected to the power system 110.

The power management server 200, the facility 300, and the shared power storage device 400 are connected to the network 120. The network 120 may provide a line between the power management server 200 and the facility 300 and a line between the power management server 200 and the shared power storage device 400. For example, the network 120 is the Internet. The network 120 may provide a dedicated line such as a VPN (Virtual Private Network).

The power management server 200 manages the shared power storage device 400 shared by the plurality of facilities 300. The electric power management server 200 is a server managed by an electric power company such as a power generation company, a power transmission and distribution company, a retail company, or a resource aggregator. A resource aggregator is an electric power company that provides reverse power flow to a power generation company, a power transmission and distribution company, a retail company, and the like in a VPP (Virtual Power Plant). In the embodiment, the details of the power management server 200 will be described later (see FIG. 2).

Here, the power management server 200 may transmit a control message instructing the EMS 320 provided in the facility 300 to control the distributed power source 310 provided in the facility 300. For example, the power management server 200 may transmit a power flow control message (for example, DR; Demand Response) requesting power flow control, or may send a reverse power flow control message requesting reverse power flow control. Further, the power management server 200 may send a power control message for controlling the operating state of the distributed power source. The degree of control of power flow or reverse power flow may be expressed by an absolute value (for example, XX kW) or a relative value (for example, XX%). Alternatively, the degree of control of power flow or reverse power flow may be expressed at two or more levels. The degree of control of power flow or reverse power flow may be expressed by the power charge (RTP; Real Time Pricing) determined by the current power supply and demand balance, and the power charge (TOU; Time Of Use) determined by the past power supply and demand balance. May be represented by.

Facility 300 has a distributed power source 310 and an EMS 320. Facility 300 may have load equipment that consumes power. For example, the load device is an air-conditioning device, a lighting device, an AV (Audio Visual) device, or the like.

The distributed power source 310 is a device that generates electric power. The distributed power source 310 may be a device that generates electricity using renewable energy such as solar power, wind power, hydraulic power, and geothermal power. Such a distributed power source 310 is a solar cell device, a wind power generation device, a hydroelectric power generation device, a geothermal power generation device, or the like. The distributed power source 310 may be a device that generates electricity using fuel. Such a distributed power source 310 includes a solid oxide fuel cell (SOFC: Solid Oxide Fuel Cell), a solid polymer fuel cell (PEFC: Polymer Electrolite Fuel Cell), and a phosphoric acid fuel cell (PAFC: Phosphoric Acid Fuel Cell). ), Molten Carbonate Fuel Cell (MCFC) and the like.

The EMS 320 is a device (EMS; Energy Management System) that manages the electric power of the facility 300. The EMS 320 may control the operating state of the distributed power source 310. EMS320 is an example of VEN (Visual End Node).

Here, the plurality of facilities 300 may include a first facility having an individual power storage device and a second facility not having an individual power storage device. For example, the facility 300A is an example of a first facility having an individual power storage device 330A. Facility 300B is an example of a second facility that does not have an individual power storage device. The plurality of facilities 300 may include a small-scale facility having a small-scale distributed power source and a large-scale facility having a large-scale distributed power source having a larger power generation capacity than the small-scale distributed power source. For example, the facility 300A is an example of a small-scale facility having a small-scale distributed power source 310A, and the facility 300B is an example of a small-scale facility having a small-scale distributed power source 310B. The facility 300C is an example of a large-scale facility having a large-scale distributed power source 310C.

Further, the load device possessed by the facility 300 does not have to be located in the facility 300, and may be a load device belonging to the user of the facility 300. For example, the facility 300A may have an electric vehicle 340A as a load device belonging to the user of the facility 300A. The power storage device provided in the electric vehicle 340A can be charged by the charging station 500. Further, when the electric vehicle 340A is located in the facility 300A, the power storage device provided in the electric vehicle 340A may be considered as an example of the individual power storage device. In such a case, the electric vehicle 340A may have a function of communicating via the network 120. The electric vehicle 340A may transmit the remaining charge of the power storage device provided in the electric vehicle 340A to the power management server 200 or the EMS 320A.

Here, the charging station 500 may be provided inside the facility 300A instead of outside the facility 300A. In such a case, when the electric vehicle 340A is connected to the charging station 500 in the facility 300A, the power storage device provided in the electric vehicle 340A may be considered as one of the individual power storage devices. Further, the electric vehicle 340A may be used in combination with the individual power storage device 330A.

In the embodiment, the communication between the power management server 200 and the EMS 320 may be performed according to the first protocol. On the other hand, communication between the EMS 320 and the distributed power source 310 may be performed according to a second protocol different from the first protocol. For example, as the first protocol, a protocol compliant with Open ADR (Automated Demand Response) or a proprietary dedicated protocol can be used. For example, as the second protocol, a protocol compliant with ECHONET Lite, SEP (Smart Energy Profile) 2.0, KNX, or a proprietary dedicated protocol can be used. It should be noted that the first protocol and the second protocol may be different, for example, even if both are original dedicated protocols, they may be protocols made according to different rules. Communication between the power management server 200 and the shared power storage device 400 may be performed according to the first protocol or may be performed according to the second protocol.

The shared power storage device 400 is shared by a plurality of facilities 300. The virtual storage remaining amount of the shared power storage device 400 is managed for each of the plurality of facilities 300. The virtual charge remaining amount is a stored amount remaining that is virtually managed for each facility 300. The remaining amount of virtual storage is increased by charging using the charging power output from the plurality of distributed power sources 310 individually provided in the plurality of facilities 300 to the power system 110, and the shared storage device 400 discharges the load equipment of the facility 300 to the load equipment. Decreases by. Here, the charging power output from the plurality of distributed power supplies 310 does not have to be directly charged to the shared power storage device 400, and the shared power storage device 400 is charged by the power supplied from the power system 110. Also, the amount of charging power output from the plurality of distributed power supplies 310 may be the same as the amount of power charged from the power system 110 to the shared power storage device 400.

The charging station 500 has a device that discharges electric power to a load device connected to the charging station 500. The charging station 500 has a device for charging the electric power supplied from the electric power system 110. The charging station 500 may have a device for charging the electric power output from the individual power storage device (for example, the electric vehicle 340A) connected to the charging station 500.

(Power management server)
Hereinafter, the power management server according to the embodiment will be described. As shown in FIG. 2, the power management server 200 has a database 210, a communication unit 220, and a control unit 230. The power management server 200 is an example of a VTN (Visual Top Node).

The database 210 is composed of a storage medium such as a non-volatile memory and / and an HDD, and stores data related to the facility 300 managed by the power management server 200. The facility 300 managed by the electric power management server 200 may be a facility 300 having a contract with an electric power company.

The data regarding the facility 300 may include charging power output from a plurality of distributed power sources 310 as the power used for charging the shared power storage device 400. The data regarding the facility 300 may include the discharge power from the shared power storage device 400 to the load device of the facility 300. The data regarding the facility 300 may include the usage record (charge and discharge history) of the shared power storage device 400 for each of the plurality of facilities 300. The data relating to the facility 300 may include the virtual storage capacity frame of the shared power storage device 400 for each of the plurality of facilities 300, or may include the virtual storage remaining amount of the shared power storage device 400, and the virtual capacity frame and the virtual storage remaining amount. The virtual charging capacity, which is the difference between the two, may be included. The virtual capacity frame is the capacity virtually allocated to the facility 300, and may be determined by a contract between the electric power company and the user.

For example, the data regarding the facility 300 may be the demand power supplied from the power system 110 to the facility 300, and is reduced at each facility 300 in response to a demand reduction request (DR; Demand Response) of the entire power system 110. It may be the amount of electric power. The data regarding the facility 300 may be the type of the distributed power source 310 provided in the facility 300, the specifications of the distributed power source 310 provided in the facility 300, and the like. The specifications may be the rated power generation power (W) and the maximum output power (W) of the distributed power source 310.

The database 210 may store data relating to the shared power storage device 400. The data relating to the shared power storage device 400 may include the actual storage capacity of the shared power storage device 400, may include the actual storage capacity of the shared power storage device 400, and may include the actual storage capacity which is the difference between the actual capacity and the actual storage capacity. It may be included. The data relating to the shared power storage device 400 may include the dischargeable power of the shared power storage device 400 in a unit time, or may include the rechargeable power of the shared power storage device 400 in a unit time. Here, the actual capacity is the capacity actually possessed by the shared power storage device 400. The actual remaining charge is the amount of charge actually stored in the shared power storage device 400. The actual storage capacity is the difference between the actual capacity and the actual storage capacity.

The communication unit 220 is composed of a communication module and communicates with the EMS 320 via the network 120. As described above, the communication unit 220 communicates according to the first protocol. For example, the communication unit 220 transmits the first message to the EMS 320 according to the first protocol. The communication unit 220 receives the first message response from the EMS 320 according to the first protocol.

In an embodiment, the communication unit 220 receives at least one of a charge request and a discharge request of the shared power storage device 400. The communication unit 220 may receive at least one of a charge request and a discharge request from the facility 300 (for example, EMS320). The communication unit 220 may receive at least one of a charge request and a discharge request from a terminal (for example, a smartphone, a tablet, a personal computer) belonging to the user of the facility 300.

The communication unit 220 transmits at least one of a charge response to the charge request and a discharge response to the discharge request. The communication unit 220 may transmit at least one of the charge response and the discharge response to the facility 300 (for example, EMS320), and may transmit at least one of the charge response and the discharge response to the terminal belonging to the user of the facility 300. May be good.

The communication unit 220 communicates with the shared power storage device 400 via the network 120. As described above, the communication unit 220 may perform communication according to the first protocol or may perform communication according to the second protocol. For example, the communication unit 220 receives a message from the shared power storage device 400 including an information element indicating the actual capacity of the shared power storage device 400. The communication unit 220 receives from the shared power storage device 400 a message (status) including an information element indicating at least one of the actual charge remaining amount and the actual charge remaining capacity of the shared power storage device 400.

The control unit 230 is composed of a memory, a CPU, and the like, and controls each configuration provided in the power management server 200. For example, the control unit 230 instructs the EMS 320 provided in the facility 300 to control the distributed power source 310 provided in the facility 300 by transmitting a control message. As described above, the control message may be a power flow control message, a reverse power flow control message, or a power supply control message.

In the embodiment, the control unit 230 manages the data stored in the database 210. For example, as shown in FIG. 3, the control unit 230 manages the actual capacity of the shared power storage device 400 and manages the virtual capacity frame of each facility 300. In FIG. 3, 2 units of a virtual capacity frame are assigned to the facility 300A, 1 unit of a virtual capacity frame is assigned to the facility 300B, and 9 units of a virtual capacity frame is assigned to the facility 300C. The actual capacity of the shared power storage device 400 may include a capacity other than the virtual capacity frame allocated to the facility 300 (that is, a capacity not allocated to the facility 300), and such capacity is used for other purposes. May be good. Here, the unit means one square shown in FIG. 3, and is an arbitrary capacity (for example, 1kWh, 10kWh, etc.).

Under such a premise, the control unit 230 manages the charging power output from the plurality of distributed power sources 310 as the power used for charging the shared power storage device 400. The control unit 230 applies a price higher than the standard power purchase price as the purchase price of the charging power. The standard power purchase price is a price applied to power (reverse power flow power) output from a plurality of distributed power sources 310 without going through the shared power storage device 400. The electric power output from the plurality of distributed power sources 310 without passing through the shared electric power storage device 400 is the electric power that contributes to the real-time supply / demand adjustment of the power system 110 without being stored in the shared electric power storage device 400. The standard power purchase price is determined by a contract between the electric power company and the user. According to such a configuration, the distributed power source 310 provided in the facility 300 as a part of the base load power source can be effectively used by actively using the shared power storage device 400.

The standard power purchase price may be a price applied to the power output from the plurality of distributed power sources 310 without going through the shared power storage device 400 after the application period of the feed-in tariff system has expired. According to such a configuration, the distributed power source 310 can be effectively used as a part of the base load power source even after the application period of the feed-in tariff has expired.

The purchase price of the charging power applied to the first facility (for example, facility 300A) having an individual power storage device (for example, individual power storage device 330A) is the second facility (for example, facility 300B) not having an individual power storage device. ) May be higher than the purchase price of the charging power applied to. According to such a configuration, the shared power storage device 400 is more likely to be actively used than the individual power storage device 330A, and the distributed power supply 310 can be effectively used as a part of the base load power supply.

The control unit 230 may apply a price higher than the purchase price of the charging power as the selling price of the discharge power output from the shared power storage device 400. With such a configuration, it is possible to secure the profit of the electric power company that manages the shared power storage device 400.

The selling price of the discharged power may be lower than the standard selling price. The standard selling price is a price applied to the electric power provided without going through the shared power storage device 400. For example, the electric power provided without passing through the shared power storage device 400 is the electric power procured by the electric power company and the electric power provided by the power generation company. The standard selling price is determined by a contract between the electric power company and the user. With such a configuration, the active use of the shared power storage device 400 is promoted.

In such a case, the control unit 230 stores in the shared power storage device 400 within a range not exceeding the amount of power supplied to the shared power storage device 400 from the distributed power source provided in the target facility (that is, the remaining amount of virtual storage). The generated power may be supplied to the load equipment belonging to the target facility free of charge. For example, when the target facility is the facility 300A, the load device may be an electric vehicle 340A.

The amount of profit applied to a large facility (eg, facility 300C) having a large distributed power source (eg, large distributed power source 310C) is a small distributed power source (eg, small scale distributed power source 310A and small scale distributed power source 310B). ) May be smaller than the amount of profit applied to small-scale facilities (eg, facility 300A and facility 300B). The profit amount is the difference between the purchase price of the charged power and the selling price of the discharged power. With such a configuration, it is possible to encourage the entry of large-scale facilities and promote the active use of the shared power storage device 400.

(Power management method)
Hereinafter, the power management method according to the embodiment will be described.

First, a facility 300A having a small-scale distributed power source 310A and an individual power storage device 330A will be described with reference to FIG.

As shown in FIG. 4, in step S10, the power management server 200 receives the status from the shared power storage device 400. The status may include an information element indicating at least one of the actual charge remaining amount and the actual charge remaining capacity of the shared power storage device 400. The status may include an information element indicating at least one of the virtual charge remaining amount and the virtual charging capacity of the facility 300A.

In step S11, the power management server 200 receives the charging request of the shared power storage device 400 from the facility 300A. The charging request may include an information element indicating the amount of charging power of the shared power storage device 400.

In step S12, the power management server 200 determines whether or not to allow the charge request. For example, the power management server 200 determines whether or not charging can be performed in response to a charging request within a range that does not exceed the virtual charging capacity of the facility 300A. Here, a case where a charging request is permitted will be described. Here, the power management server 200 may determine the purchase price of the charging power. As described above, the purchase price of charging power (for example, 9 yen (7 yen + 2 yen) / kWh) is higher than the standard power purchase price (for example, 7 yen / kWh).

In step S13, the power management server 200 transmits the charge response to the facility 300A. The charge response may include an information element indicating the purchase price of the charging power.

In step S14, the small-scale distributed power source 310A of the facility 300A outputs power to the shared power storage device 400 via the power system 110 (reverse power flow).

In step S20, the power management server 200 receives the status from the shared power storage device 400.

In step S21, the power management server 200 receives the discharge request of the shared power storage device 400 from the facility 300A. The discharge request may include an information element indicating the amount of discharge power of the shared power storage device 400.

In step S22, the power management server 200 determines whether or not to allow the discharge request. For example, the power management server 200 determines whether or not the discharge according to the discharge request can be performed within a range that does not exceed the actual remaining charge of the shared power storage device 400. Here, a case where the discharge request is permitted will be described. Here, the power management server 200 may determine the selling price of the discharged power. The selling price (for example, 12 yen / kWh) may be lower than the standard selling price (for example, 15 yen / kWh). The selling price (12 yen / kWh) may be higher than the buying price (9 yen / kWh). Further, the discharge power of the shared power storage device 400 may be free of charge as long as it does not exceed the virtual storage remaining amount of the facility 300A.

In step S23, the power management server 200 transmits the discharge response to the facility 300A. The discharge response may include an information element indicating the selling price of the discharged power.

In step S24, the power management server 200 transmits a discharge instruction to the shared power storage device 400. The discharge instruction may include an information element indicating the amount of discharge power.

In step S25, the shared power storage device 400 outputs electric power to a load device (for example, an electric vehicle 340A) belonging to the facility 300A via the electric power system 110 (tide flow).

Secondly, the facility 300B having a small-scale distributed power source 310B and not having an individual power storage device will be described with reference to FIG.

As shown in FIG. 5, in step S30, the power management server 200 receives the status from the shared power storage device 400 as in step S10.

In step S31, the power management server 200 receives the charging request of the shared power storage device 400 from the facility 300B as in step S11.

In step S32, the power management server 200 determines whether or not to allow the charging request, and determines the purchase price of the charging power, as in step S12. As described above, the power purchase price (for example, 8 yen (7 yen + 1 yen) / kWh) is higher than the standard power purchase price (for example, 7 yen / kWh). However, the power purchase price applied to the facility 300B (for example, 8 yen / kWh) may be lower than the power purchase price applied to the facility 300A (for example, 9 yen / kWh).

In step S33, the power management server 200 transmits the charge response to the facility 300B as in step S13.

In step S34, the small-scale distributed power source 310B of the facility 300B outputs power to the shared power storage device 400 via the power system 110 (reverse power flow), similarly to step S14.

In step S40, the power management server 200 receives the status from the shared power storage device 400 as in step S20.

In step S41, the power management server 200 receives the discharge request of the shared power storage device 400 from the facility 300B as in step S21.

In step S42, the power management server 200 may determine whether or not to allow the discharge request and determine the selling price of the discharged power, as in step S22. The selling price (for example, 12 yen / kWh) may be lower than the standard selling price (for example, 15 yen / kWh). The selling price (12 yen / kWh) may be higher than the buying price (9 yen / kWh). Further, the discharge power of the shared power storage device 400 may be free of charge as long as it does not exceed the virtual storage remaining amount of the facility 300B.

In step S43, the power management server 200 transmits the discharge response to the facility 300B as in step S23.

In step S44, the power management server 200 transmits a discharge instruction to the shared power storage device 400 as in step S24.

In step S45, the shared power storage device 400 outputs electric power to the load device belonging to the facility 300B via the electric power system 110 (tide), similarly to step S25.

Thirdly, the facility 300C having the large-scale distributed power source 310C will be described with reference to FIG.

As shown in FIG. 6, in step S50, the power management server 200 receives the status from the shared power storage device 400 as in step S10.

In step S51, the power management server 200 receives the charging request of the shared power storage device 400 from the facility 300C as in step S11.

In step S52, the power management server 200 determines whether or not to allow the charging request, and determines the purchase price of the charging power, as in step S12. As described above, the power purchase price (for example, 19 yen / kWh) is higher than the standard power purchase price (for example, 7 yen / kWh). However, the power purchase price applied to the facility 300C (for example, 19 yen / kWh) may be higher than the power purchase price applied to the facility 300A and the facility 300B.

In step S53, the power management server 200 transmits the charge response to the facility 300C as in step S13.

In step S54, the large-scale distributed power source 310C of the facility 300C outputs electric power to the shared power storage device 400 via the electric power system 110 (reverse power flow) as in step S14.

In step S60, the power management server 200 receives the status from the shared power storage device 400 as in step S20.

In step S61, the power management server 200 receives the discharge request of the shared power storage device 400 from the facility 300C as in step S21.

In step S62, the power management server 200 may determine whether or not to allow the discharge request and determine the selling price of the discharged power, as in step S22. The selling price (for example, 19 yen / kWh) may be lower than the standard selling price (for example, 27 yen / kWh). Further, the discharge power of the shared power storage device 400 may be free of charge as long as it does not exceed the virtual storage remaining amount of the facility 300C. Here, the profit amount applied to the facility 300C (for example, 0 yen / kWh) may be smaller than the profit amount applied to the facility 300A and the facility 300B (for example, 3 yen or 4 yen / kWh).

In step S63, the power management server 200 transmits the discharge response to the facility 300C as in step S23.

In step S64, the power management server 200 transmits a discharge instruction to the shared power storage device 400 as in step S24.

In step S65, the shared power storage device 400 outputs electric power to the load device belonging to the facility 300C via the electric power system 110 (tide), similarly to step S25.

(Action and effect)
In the embodiment, the power management server 200 applies a price higher than the standard power purchase price as the power purchase price of the charging power output from the distributed power source 310. According to such a configuration, the distributed power source 310 can be effectively used as a part of the base load power source by positively using the shared power storage device 400.

[Other embodiments]
Although the invention has been described by embodiments described above, the statements and drawings that form part of this disclosure should not be understood to limit the invention. This disclosure will reveal to those skilled in the art various alternative embodiments, examples and operational techniques.

In the embodiment, the power management server 200 applies a price higher than the standard power purchase price as the power purchase price of the charging power (reverse tide power output from the distributed power supply 310) used for charging the shared power storage device 400. However, the embodiments are not limited to this. When the predetermined condition is satisfied, the power management server 200 may apply a price equal to or lower than the standard power purchase price as the power purchase price of the charging power. Whether or not the predetermined condition is satisfied may be determined based on the supply and demand balance of the electric power system 110, the contract between the electric power company and the user, and the like.

Although not particularly mentioned in the embodiment, the selling price of the discharge power of the shared power storage device 400 may be determined in an auction format. The selling price of the discharged power of the shared power storage device 400 may be determined based on the supply and demand balance of the power system 110.

Although not particularly mentioned in the embodiment, the standard power purchase price and the standard power sale price may be individually set for each facility 300 by a contract between the electric power company and the user.

Although not particularly mentioned in the embodiment, the settlement associated with the use (virtual charging and virtual discharging) of the shared power storage device 400 may be performed every predetermined period (for example, one month).

In an embodiment, the power management server 200 has a database 210. However, the embodiments are not limited to this. The database 210 may be a cloud server provided on the Internet.

Although not particularly mentioned in the embodiment, the EMS 320 provided in the facility 300 does not necessarily have to be provided in the facility 300. For example, some of the functions of the EMS 320 may be provided by a cloud server provided on the Internet. That is, it may be considered that the EMS 320 includes a cloud server.

In the embodiment, the case where the first protocol is a protocol compliant with Open ADR 2.0 and the second protocol is a protocol compliant with ECHONET Lite has been exemplified. However, the embodiments are not limited to this. The first protocol may be any protocol standardized as a protocol used for communication between the power management server 200 and the EMS 320. The second protocol may be any protocol standardized as the protocol used in the facility 300.

The entire contents of Japanese Patent Application No. 2018-013529 (filed on January 30, 2018) are incorporated in the present application by reference.

Claims (8)

A shared power storage device shared by multiple facilities,
A plurality of distributed power sources individually provided in the plurality of facilities, and
As the electric power used for charging the shared power storage device, a power management server that manages the charging electric power output from the plurality of distributed power sources is provided.
The power management server determines the power purchase price applied to the charging power to be higher than the standard power purchase price based on the standard power purchase price.
The standard power purchase price is a price applied to power output from the plurality of distributed power sources without going through the shared power storage device .
The plurality of facilities include a first facility having an individual power storage device and a second facility not having an individual power storage device.
A power management system in which the purchase price of the charging power applied to the first facility is higher than the purchase price of the charging power applied to the second facility . The standard power purchase price is a price applied to power output from the plurality of distributed power sources without going through the shared power storage device after the application period of the feed-in tariff system has expired. The power management system described in. The power management server claims that the selling price of the discharged power output from the shared power storage device is determined to be higher than the buying price of the charging power based on the buying price of the charging power. 1 or the power management system according to claim 2 . The selling price is lower than the standard selling price.
The power management system according to claim 3 , wherein the standard selling price is a price applied to power provided without going through the shared power storage device. The plurality of facilities include a target facility having a target distributed power source.
The power management server supplies the power stored in the shared power storage device to the load equipment belonging to the target facility free of charge within a range not exceeding the amount of power supplied from the target distributed power source to the shared power storage device. , The power management system according to any one of claims 1 to 4 . The plurality of facilities include a small-scale facility having a small-scale distributed power source and a large-scale facility having a large-scale distributed power source having a larger power generation capacity than the small-scale distributed power source.
The amount of profit applied to the large-scale facility is smaller than the amount of profit applied to the small-scale facility.
The power management system according to any one of claims 1 to 5 , wherein the profit amount is the difference between the purchase price of the charging power and the selling price of the discharge power output from the shared power storage device. As the power used for charging the shared power storage device shared by a plurality of facilities, a control unit for managing the charging power output from a plurality of distributed power sources individually provided in the plurality of facilities is provided.
Based on the standard power purchase price , the control unit determines the power purchase price applied to the charging power to be higher than the standard power purchase price.
The standard power purchase price is a price applied to power output from the plurality of distributed power sources without going through the shared power storage device.
The plurality of facilities include a first facility having an individual power storage device and a second facility not having an individual power storage device.
A power management server in which the purchase price of the charging power applied to the first facility is higher than the purchase price of the charging power applied to the second facility . It is a power management method executed by the power management server.
As the power used for charging the shared power storage device shared by a plurality of facilities, a step of managing the charging power output from a plurality of distributed power sources individually provided in the plurality of facilities, and a step of managing the charging power.
A step of determining the power purchase price applied to the charging power to be higher than the standard power purchase price based on the standard power purchase price is provided.
The standard power purchase price is a price applied to power output from the plurality of distributed power sources without going through the shared power storage device.
The plurality of facilities include a first facility having an individual power storage device and a second facility not having an individual power storage device.
A power management method in which the purchase price of the charging power applied to the first facility is higher than the purchase price of the charging power applied to the second facility .

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