WO2019150883A1

WO2019150883A1 - Power management system, power management server, and power management method

Info

Publication number: WO2019150883A1
Application number: PCT/JP2018/048577
Authority: WO
Inventors: 朗奥村
Original assignee: 京セラ株式会社
Priority date: 2018-01-30
Filing date: 2018-12-28
Publication date: 2019-08-08
Also published as: JPWO2019150883A1; JP7037583B2

Abstract

A power management system comprising: a shared power storage device shared by a plurality of facilities; a plurality of distributed power supplies provided in each of the plurality of facilities; and a power management server that manages charging power output from the plurality of distributed power supplies, as power used for charging the shared power storage device. The power management server applies a higher price than a standard power purchase price, as the power purchase price for the charging power. The standard power purchase price is the price applied to power output from the plurality of distributed power supplies without passing through the shared power storage device.

Description

Power management system, power management server, and power management method

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 increases with a charge request acquired from the facility, and decreases with a discharge request acquired from the facility (for example, Patent Document 1).

International Publication No. 2016/136263 Pamphlet

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

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

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

At present, most of the power supplied through the power system is supplied from thermal power plants. Due to the increasing demand for CO ₂ reduction and the like, it is desired to actively use the distributed power source provided in the facility as part of the base load power source.

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

Embodiments provide a power management system, a power management server, and a power management method capable of effectively using a distributed power source provided in a facility as a part of a base load power source.

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

However, it should be noted that the drawings are schematic and ratios of dimensions may differ from actual ones. Therefore, specific dimensions and the like should be determined in consideration of the following description. Of course, the drawings may include portions having different dimensional relationships or ratios.

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

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, as the facility 300, a facility 300A to a facility 300C are illustrated. The power management system 100 may include a charging station 500 that charges a power storage device provided in the electric vehicle.

Each facility 300 is connected to the power system 110. In the following, the flow of power from the power system 110 to the facility 300 is referred to as tidal current, and the flow of power from the facility 300 to the power system 110 is referred to as reverse power flow. Shared power storage device 400 and charging station 500 are connected to 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 a plurality of facilities 300. The power management server 200 is a server managed by a power company such as a power generation company, a transmission / distribution company, a retail company, or a resource aggregator. The resource aggregator is a power provider that provides reverse power flow to a power generation company, a power transmission / distribution company, a retailer, and the like in a VPP (Virtual Power Plant). In the embodiment, 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 control to the distributed power supply 310 provided in the facility 300 to the EMS 320 provided in the facility 300. For example, the power management server 200 may transmit a power flow control message (for example, DR; Demand Response) that requests control of power flow, or may transmit a reverse power flow control message that requests control of reverse power flow. Furthermore, the power management server 200 may transmit a power control message for controlling the operating state of the distributed power. The degree of control of the tidal current or the reverse tidal current may be represented by an absolute value (for example, OO kW) or a relative value (for example, OO%). Or the control degree of a tidal current or a reverse tidal current may be represented by two or more levels. The degree of control of the tidal current or reverse power flow may be represented by a power rate (RTP: Real Time Pricing) determined by the current power supply / demand balance, or a power rate (TOU: Time Of Use) determined by the past power supply / demand balance May be represented by

The facility 300 includes a distributed power source 310 and an EMS 320. The facility 300 may include a load device that consumes power. For example, the load device is an air conditioner, a lighting device, an AV (Audio Visual) device, or the like.

The distributed power supply 310 is a device that generates power. The distributed power source 310 may be a device that generates power using renewable energy such as sunlight, wind power, hydropower, and geothermal heat. Such a distributed power source 310 is a solar cell device, a wind power generator, a hydroelectric generator, a geothermal power generator, or the like. The distributed power source 310 may be a device that generates power using fuel. Such a distributed power supply 310 includes a solid oxide fuel cell (SOFC), a polymer electrolyte fuel cell (PEFC), a phosphoric acid fuel cell (PAFC), and a phosphoric acid fuel cell (PAFC). ), Molten carbonate fuel cell (MCFC: Molten Carbonate Fuel Cell).

The EMS 320 is an apparatus (EMS; Energy Management System) that manages the power of the facility 300. The EMS 320 may control the operating state of the distributed power supply 310. The EMS 320 is an example of a VEN (Virtual End Node).

Here, the plurality of facilities 300 may include a first facility having an individual power storage device and a second facility having no individual power storage device. For example, the facility 300A is an example of a first facility having the 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 supply 310C.

Furthermore, the load device possessed by the facility 300 does not need to be located in the facility 300, and may be any 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 340 </ b> A can be charged by the charging station 500. Furthermore, 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 an individual power storage device. In such a case, the electric vehicle 340A may have a function of performing communication via the network 120. The electric vehicle 340A may transmit the remaining amount of power stored in 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 not in the facility 300A but in 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. In addition, electric vehicle 340A may be used in combination with individual power storage device 330A.

In the embodiment, communication between the power management server 200 and the EMS 320 may be performed according to the first protocol. On the other hand, the communication between the EMS 320 and the distributed power supply 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 unique dedicated protocol can be used. For example, as the second protocol, a protocol conforming to ECHONET Lite, SEP (Smart Energy Profile) 2.0, KNX, or an original dedicated protocol can be used. Note that the first protocol and the second protocol only need to be different. For example, even if both are unique dedicated protocols, they may be protocols created 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 according to the second protocol.

Shared power storage device 400 is shared by a plurality of facilities 300. For each of the plurality of facilities 300, the virtual power remaining amount of the shared power storage device 400 is managed. The virtual remaining power amount is a remaining power amount that is virtually managed for each facility 300. The remaining amount of virtual power storage is increased by charging using charging power output from the plurality of distributed power sources 310 provided individually to the plurality of facilities 300 to the power system 110, and discharging from the shared power storage device 400 to the load devices of the facility 300 Decrease by Here, the charging power output from the plurality of distributed power sources 310 may not be directly charged into the shared power storage device 400, and the charging of the shared power storage device 400 is performed by the power supplied from the power system 110. The amount of charging power output from the plurality of distributed power sources 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 power to a load device connected to the charging station 500. The charging station 500 includes a device that charges power supplied from the power system 110. Charging station 500 may include a device that charges power output from an individual power storage device (for example, electric vehicle 340 </ b> A) connected to charging station 500.

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

The database 210 is configured by a storage medium such as a nonvolatile memory and / or HDD, and stores data related to the facility 300 managed by the power management server 200. The facility 300 managed by the power management server 200 may be a facility 300 that has a contract with an electric power company.

The data regarding the facility 300 may include charging power output from the plurality of distributed power sources 310 as power used for charging the shared power storage device 400. The data related to the facility 300 may include discharge power from the shared power storage device 400 to the load device of the facility 300. The data related to the facility 300 may include the actual usage of the shared power storage device 400 (charging and discharging history) for each of the plurality of facilities 300. The data regarding the facility 300 may include the virtual capacity frame of the shared power storage device 400 or the virtual power storage remaining amount of the shared power storage device 400 for each of the plurality of facilities 300. The virtual charging capacity that is the difference between the two may be included. The virtual capacity frame is a 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 related to the facility 300 may be demand power supplied from the power system 110 to the facility 300, and reduced at each facility 300 in response to a demand power reduction request (DR) of the entire power system 110. May be the amount of electric power. The data related to the facility 300 may be the type of the distributed power supply 310 provided in the facility 300, the specifications of the distributed power supply 310 provided in the facility 300, and the like. The specifications may be the rated generated power (W) and maximum output power (W) of the distributed power source 310.

The database 210 may store data related to the shared power storage device 400. The data related to the shared power storage device 400 may include the actual capacity of the shared power storage device 400, may include the actual power storage remaining amount of the shared power storage device 400, and the actual power storage capacity that is the difference between the actual capacity and the actual power storage remaining amount. May be included. The data related to shared power storage device 400 may include the dischargeable power of shared power storage device 400 in unit time, or may include the rechargeable power of shared power storage device 400 in unit time. Here, the actual capacity is a capacity that the shared power storage device 400 actually has. The actual power storage remaining amount is the remaining power storage actually stored in the shared power storage device 400. The actual storage capacity is the difference between the actual capacity and the actual remaining power.

The communication unit 220 includes a communication module, and communicates with the EMS 320 via the network 120. As described above, the communication unit 220 performs communication according to the first protocol. For example, the communication unit 220 transmits a 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 the 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, EMS 320). 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, or a personal computer) belonging to the user of the facility 300.

The communication unit 220 transmits at least one of a charging response to the charging request and a discharging response to the discharging request. The communication unit 220 may transmit at least one of a charging response and a discharging response to the facility 300 (for example, EMS 320), and may transmit at least one of the charging response and the discharging response to a terminal belonging to the user of the facility 300. Also 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 including an information element indicating the actual capacity of the shared power storage device 400 from 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 power storage remaining amount and the actual charge remaining capacity of the shared power storage device 400.

The control unit 230 includes a memory, a CPU, and the like, and controls each component 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 supply 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 control message.

In the embodiment, the control unit 230 manages data stored in the database 210. For example, as illustrated 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 virtual capacity frames are allocated to the

facility

300A, 1 unit of virtual capacity frames are allocated to the facility 300B, and 9 units of virtual capacity frames are allocated 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. Also good. Here, the unit means one square shown in FIG. 3, and is an arbitrary capacity (for example, 1 kWh, 10 kWh, etc.).

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

The reference power purchase price may be a price applied to electric power output from the plurality of distributed power sources 310 without passing through the shared power storage device 400 after the fixed price purchase system application period ends. 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 fixed price purchase system is over.

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

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

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

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

The profit amount applied to a large-scale facility (for example, facility 300C) having a large-scale distributed power source (for example, large-scale distributed power source 310C) is a small-scale distributed power source (for example, small-scale distributed power source 310A and small-scale distributed power source 310B). ) May be smaller than the profit amount applied to a small-scale facility (for example, the facility 300A and the facility 300B). The amount of profit is the difference between the purchase price of charging power and the selling price of discharge power. According to such a configuration, entry of a large-scale facility can be promoted, and active use of the shared power storage device 400 is promoted.

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

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

As shown in FIG. 4, in step S <b> 10, the power management server 200 receives a status from the shared power storage device 400. The status may include an information element indicating at least one of the actual power storage 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 power storage remaining capacity and the virtual charging capacity of the facility 300A.

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

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

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

In step S14, the small-scale distributed power supply 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 a discharge request for 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 shared power storage device 400.

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

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

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

Second, a facility 300B that has a small-scale distributed power supply 310B and does not have 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 a charge request for the shared power storage device 400 from the facility 300B, as in step S11.

In step S32, as in step S12, the power management server 200 determines whether or not to permit the charge request, and determines the purchase price of the charged power. 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 (for example, 8 yen / kWh) applied to the facility 300B may be lower than the power purchase price (for example, 9 yen / kWh) applied to the facility 300A.

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

In step S34, the small-scale distributed power supply 310B of the facility 300B outputs power to the shared power storage device 400 via the power system 110 (reverse power flow) as in 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 a discharge request for the shared power storage device 400 from the facility 300B, as in step S21.

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

In step S43, the power management server 200 transmits a 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 power to the load equipment belonging to the facility 300B via the power system 110 (tidal current), as in step S25.

Third, a facility 300C having a large-scale distributed power supply 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, similarly to step S10.

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

In step S52, as in step S12, the power management server 200 determines whether or not to permit the charge request, and determines the purchase price of the charged power. 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 (for example, 19 yen / kWh) applied to the facility 300C 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 a charging response to the facility 300C as in step S13.

In step S54, the large-scale distributed power supply 310C of the facility 300C outputs power to the shared power storage device 400 via the 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 a discharge request for the shared power storage device 400 from the facility 300C, as in step S21.

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

In step S63, the power management server 200 transmits a 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 power to the load devices belonging to the facility 300C via the power system 110 (tidal current), similarly to step S25.

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

[Other Embodiments]
Although the present invention has been described with reference to the above-described embodiments, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

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

Although not specifically 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 shared power storage device 400 may be determined based on the supply and demand balance of power system 110.

Although not specifically mentioned in the embodiment, the reference power purchase price and the reference power sale price may be individually determined for each facility 300 by a contract between the power company and the user.

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

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

Although not specifically 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 conforming to Open ADR2.0 and the second protocol is a protocol conforming to ECHONET Lite is illustrated. However, the embodiment is not limited to this. The first protocol may be a protocol that is standardized as a protocol used for communication between the power management server 200 and the EMS 320. The second protocol may be a protocol standardized as a protocol used in the facility 300.

Note that the entire content of Japanese Patent Application No. 2018-013529 (filed on January 30, 2018) is incorporated herein by reference.

Claims

A shared power storage device shared by multiple facilities;
A plurality of distributed power sources individually provided in the plurality of facilities;
A power management server for managing charging power output from the plurality of distributed power sources as power used for charging the shared power storage device;
The power management server applies a price higher than a standard power purchase price as a power purchase price of the charging power,
The reference power purchase price is a power management system that is a price applied to power output from the plurality of distributed power sources without going through the shared power storage device.
The reference power purchase price is a price that is applied to electric power output from the plurality of distributed power sources without going through the shared power storage device after an application period of a fixed price purchase system ends. The power management system described in 1.
The plurality of facilities includes a first facility having an individual power storage device and a second facility not having an individual power storage device,
The power management system according to claim 1 or 2, wherein a power purchase price of the charging power applied to the first facility is higher than a power purchase price of the charging power applied to the second facility.
4. The power management system according to claim 1, wherein the power management server applies a price higher than a purchase price of the charging power as a selling price of the discharged power output from the shared power storage device. 5. .
The power selling price is lower than the standard power selling price,
The power management system according to claim 4, wherein the reference power selling price is a price applied to power provided without going through the shared power storage device.
The plurality of facilities includes a target facility having a target distributed power source,
The power management server supplies the power stored in the shared power storage device free of charge to the load equipment belonging to the target facility 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 5.
The plurality of facilities includes 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 6, wherein the profit amount is a difference between a power purchase price of the charging power and a power selling price of discharge power output from the shared power storage device.
As a power used for charging a shared power storage device shared by a plurality of facilities, a control unit for managing charging power output from a plurality of distributed power sources individually provided in the plurality of facilities,
The control unit applies a price higher than a standard power purchase price as the power purchase price of the charging power,
The reference power purchase price is a power management server, which is a price applied to power output from the plurality of distributed power sources without going through the shared power storage device.
Managing 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;
Applying a price higher than a standard power purchase price as the power purchase price of the charging power,
The electric power management method, wherein the reference power purchase price is a price applied to electric power output from the plurality of distributed power sources without going through the shared power storage device.