System and method for power management

Abstract

To provide a system and method for power management that allow for giving an environmental value to an attributive subject when right holders of a moving body and a power-generating device are associated with an attributive subject.SOLUTION: A system for power management, for managing a predetermined facility (home or home-visit facility) having a power-generating device (solar cell device), comprises a management device 30 having a receiving section that receives a message including a first information element to identify a right holder of the moving body and a second information element to identify a right holder of the power-generating device if an electricity storing device provided on the moving body is charged by output power from a power-generating device and a control section that identifies an attributive subject of an environmental value caused by charging to the electricity storing device based on the first and second information elements.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to a power management system and a power management method.

Background Art

[0002] In recent years, power generation devices that utilize natural energy such as sunlight, wind power, hydraulic power, and geothermal energy have attracted attention. Furthermore, a mechanism (so-called self-consumption) in which the power output from a power generation device provided in a predetermined facility is consumed by a load device provided in the predetermined facility is known (for example, Patent Document 1).

[0003] By the way, a mechanism for imparting environmental value by the above-described self-consumption has also been proposed. Furthermore, as one of the above-described load devices, a power storage device provided in a moving body such as an electric vehicle can be considered.

[0004] However, there are cases where the power storage device provided in the moving body belonging to the predetermined facility is charged by the power output from the power generation device provided in the visiting facility other than the predetermined facility, and cases where the power storage device provided in the moving body other than the moving body belonging to the predetermined facility is charged by the power output from the power generation device provided in the predetermined facility.

[0005] In these cases, the attribution of the environmental value generated by self-consumption associated with charging the power storage device provided in the moving body is unclear.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

[0007] The power management system according to the present disclosure is a system for managing a predetermined facility having a power generation device. When the power storage device provided in the moving body is charged by the output power output from the power generation device, a reception unit that receives a message including a first information element for identifying the right holder related to the moving body and a second information element for identifying the right holder related to the power generation device, and a control unit that identifies the subject to which the environmental value generated by charging the power storage device belongs based on the first information element and the second information element.

[0008] The power management method according to the present disclosure is a method for managing a predetermined facility having a power generation device. When the power storage device provided in the moving body is charged by the output power output from the power generation device, a step of receiving a message including a first information element for identifying the right holder related to the moving body and a second information element for identifying the right holder related to the power generation device, and a step of identifying the subject to which the environmental value generated by charging the power storage device belongs based on the first information element and the second information element.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

MODE FOR CARRYING OUT THE INVENTION

[0010] 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, the drawings are schematic.

[0011] [Embodiment] (Power Management System) Hereinafter, the power management system 100 according to the embodiment will be described. As shown in FIG. 1, the power management system 100 includes a home facility 10, a visiting facility 20, a management device 30, and an electric vehicle (hereinafter, EV) 50. The home facility 10 and the management device 30 are connected via a network 120. The visiting facility 20 and the management device 30 may be connected via the network 120. The network 120 may include the Internet and may include a mobile communication network. The network 120 may include a VPN (Virtual Private Network).

[0012] The home facility 10 is an example of a predetermined facility having a power generation device (a solar cell device 11 described later). The home facility 10 belongs to the rights holder regarding the EV50. In other words, the rights holder regarding the home facility 10 is the same as the rights holder regarding the EV50, and the EV50 belongs to the home facility 10. The rights holder regarding the home facility 10 may be the owner of the home facility 10 in the case where the home facility 10 is a purchased property, or may be the lessee, lessor, or administrator of the home facility 10 in the case where the home facility 10 is a leased property. The rights holder regarding the EV50 may be the owner of the EV50 in the case where the EV50 is a purchased property, or may be the lessee, lessor, or administrator of the EV50 in the case where the EV50 is a leased property. The case where the EV50 is a leased property may include the case where the EV50 is shared and used by two or more users (car sharing). The EV50 is an example of a moving body that may move from the home facility 10.

[0013] Here, the home facility 10 has a charging facility 15 for charging a power storage device provided in the EV50. Hereinafter, the power storage device provided in the EV50 is simply referred to as the EV50. Details of the home facility 10 will be described later (see FIG. 2).

[0014] The visiting facility 20 is an example of a predetermined facility having a power generation device (for example, a solar cell device 21A described later). The visiting facility 20 does not belong to the rights holder regarding the EV50. In other words, the rights holder regarding the visiting facility 20 is different from the rights holder regarding the EV50, and the EV50 is an example of a third-party moving body that does not belong to the visiting facility 20 for the visiting facility 20. The rights holder regarding the visiting facility 20 may be the owner of the visiting facility 20 in the case where the visiting facility 20 is a purchased property, or may be the lessee, lessor, or administrator of the visiting facility 20 in the case where the visiting facility 20 is a leased property.

[0015] In FIG. 1, as the visiting facility 20, the visiting facility 20A, the visiting facility 20B, and the visiting facility 20C are illustrated. The visiting facility 20A may include a charging station for charging the EV50. The visiting facility 20B may include a commercial facility such as a shopping center. The visiting facility 20C may include the residence of a friend of the rights holder regarding the EV50. The visiting facility 20C may include an office facility where the rights holder regarding the EV50 works.

[0016] For example, the visiting facility 20 may include the visiting facility 20A having the charging equipment 25A for charging the EV50. The visiting facility 20 may include the visiting facility 20B and the visiting facility 20C that do not have the charging equipment (charging equipment 15A or charging equipment 25A, the same hereinafter) for charging the EV50. However, the visiting facility 20B and the visiting facility 20C may have the charging equipment for charging the EV50. Details of the visiting facility 20A, which is an example of the visiting facility 20, will be described later (see FIG. 3).

[0017] The management device 30 is a device that identifies the attribution subject of the environmental value generated by charging the EV50. The management device 30 is a device belonging to a management entity that manages two or more facilities including the home facility 10 and the visiting facility 20. The management device 30 may be a device managed by an operator such as a power generation operator, a power transmission and distribution operator, a retail operator, or a resource aggregator. The resource aggregator is a power operator that provides reverse power flow to power generation operators, power transmission and distribution operators, retail operators, etc. in a VPP (Virtual Power Plant). The resource aggregator may be a power operator that generates reduced power of the power flow (power consumption) of the facilities managed by the resource aggregator. The operator that manages the management device 30 may be a reverse power flow purchase entity.

[0018] The management device 30 may transmit a control message to the facility to instruct control of a distributed power source (e.g., a solar power generation device, a power storage device, or a fuel cell device) provided in the facility. For example, the management device 30 may transmit a power flow control message (e.g., DR; Demand Response) that requests control of the power flow, or may transmit a reverse power flow control message that requests control of the reverse power flow. Further, the management device 30 may transmit a power source control message that controls the operating state of the distributed power source. The degree of control of the power flow or the reverse power flow may be represented by an absolute value (e.g., ○○ kW) or a relative value (e.g., ○○%). Alternatively, the degree of control of the power flow or the reverse power flow may be represented by two or more levels. The degree of control of the power flow or the reverse power flow may be represented by a power tariff (RTP; Real Time Pricing) determined by the current power supply and demand balance, or may be represented by a power tariff (TOU; Time Of Use) determined by the past power supply and demand balance. Details of the management device 30 will be described later (see FIG. 4).

[0019] (Home facility) Hereinafter, the home facility 10 according to the embodiment will be described. As shown in FIG. 2, the home facility 10 includes a solar power generation device 11, a power storage device 12, a fuel cell device 13, a load device 14, a charging facility 15, and a local control device 16. Further, the home facility 10 includes a wattmeter 180, a wattmeter 181, and a wattmeter 182.

[0020] The solar power generation device 11 is a distributed power source that generates electricity in response to light such as sunlight. The solar power generation device 11 may be an example of a distributed power source to which a fixed feed-in tariff (FIT) is applied. For example, the solar power generation device 11 includes a PCS (Power Conditioning System) and solar panels. The solar power generation device 11 may be an example of a controlled facility that can be controlled by a management entity (management device 30).

[0021] Here, the power output from the photovoltaic power generation device 11 can vary depending on the amount of received light such as sunlight. Therefore, when considering the power generation efficiency of the photovoltaic power generation device 11, the power output from the photovoltaic power generation device 11 is variable power that can vary depending on the amount of received light by the solar panel.

[0022] The power storage device 12 is a distributed power source that performs power charging and power discharging. The power storage device 12 may be an example of a distributed power source to which a fixed purchase price is not applied. For example, the power storage device 12 is composed of a PCS and a power storage cell. The power storage device 12 may be an example of a controlled facility that can be controlled by a management entity (management device 30).

[0023] The fuel cell device 13 is a distributed power source that generates power using fuel. The fuel cell device 13 may be an example of a distributed power source to which a fixed purchase price is not applied. For example, the fuel cell device 13 is composed of a PCS and a fuel cell. The fuel cell device 13 may be an example of a controlled facility that can be controlled by a management entity (management device 30).

[0024] For example, the fuel cell device 13 may be a solid oxide fuel cell (SOFC: Solid Oxide Fuel Cell), a polymer electrolyte fuel cell (PEFC: Polymer Electrolyte Fuel Cell), a phosphoric acid fuel cell (PAFC: Phosphoric Acid Fuel Cell), or a molten carbonate fuel cell (MCFC: Molten Carbonate Fuel Cell).

[0025] The load device 14 is a device that consumes power. For example, the load device 14 is an air conditioner, a lighting device, an AV (Audio Visual) device, or the like. The load device 14 may be an example of a non-controlled facility that is not controlled by a power management entity (management device 30).

[0026] The charging device 15 is a device for charging the EV 50. The charging device 15 may include an adapter configured to be attachable to a household outlet. The charging device 15 may have a wattmeter that measures at least one of the charging power of the EV 50 and the discharging power of the EV 50. The charging device 15 may transmit power information indicating at least one of the charging power of the EV 50 and the discharging power of the EV 50 to the local control device 16.

[0027] The local control device 16 is a device (EMS; Energy Management System) that manages the power of the home facility 10. The local control device 16 may control the operating state of the solar cell device 11, may control the operating state of the energy storage device 12 provided in the home facility 10, and may control the operating state of the fuel cell device 13 provided in the home facility 10.

[0028] The wattmeter 180 is an example of a main wattmeter that measures the power flow from the power grid 110 to the home facility 10 and the reverse power flow from the home facility 10 to the power grid 110. For example, the wattmeter 180 is a smart meter belonging to an electric power company.

[0029] The wattmeter 181 is a wattmeter that measures the output power of the solar cell device 11. The wattmeter 181 may be provided in the solar cell device 11.

[0030] The power meter 182 is a power meter that measures the power of devices provided downstream of the solar power generation device 11 in the home facility 10. Here, "downstream" is a term indicating a position away from the power grid 110. When reverse power flow of the output power of the power storage device 12 and the fuel cell device 13 is not recognized, the power meter 182 may be used as a power meter for preventing reverse power flow. In such a case, the power meter 182 measures the power consumption measured as a set of devices provided downstream of the solar power generation device 11. When the power storage device 12 is performing a discharging operation, the power consumption measured by the power meter 182 is a value obtained by subtracting the total of the discharging power of the power storage device 12 and the output power of the fuel cell device 13 from the total of the power consumption of the load device 14 and the charging power of the EV 50. When the power storage device 12 is performing a charging operation, the power consumption measured by the power meter 182 is a value obtained by subtracting the total output power of the fuel cell device 13 from the total of the charging power of the power storage device 12, the power consumption of the load device 14, and the charging power of the EV 50.

[0031] In the example shown in FIG. 2, the power meter 180 may be a backbone power meter belonging to the power company and may be a power meter having higher reliability than the power meters 181 and 182. The power meter 182 may be a power meter certified by a third - party organization and may be a power meter having higher reliability than the power meter 181. The reliability here is the reliability when determining the power price and the environmental value, and may not be the reliability of the measurement accuracy.

[0032] Under such a premise, the solar power generation device 11 is an example of a power generation device that generates environmental value when the output power of the solar power generation device 11 is consumed in the home facility 10 (so-called self-consumption). For example, in a case where the reduction of carbon dioxide emissions generates environmental value, instead of the power generated by a power generation plant that emits carbon dioxide, the act of consuming the power generated by the solar power generation device 11 that does not emit carbon dioxide (self-consumption) in the home facility 10 generates environmental value in the sense that it contributes to the reduction of carbon dioxide emissions. The environmental value may be a value certified by a third-party institution. The environmental value may be certified by environmental values such as green power certificates and J-credits. In the embodiment, attention is paid to the attribution of the environmental value generated by the charging of the EV50 included in self-consumption.

[0033] The above-described local control device 16 may be able to specify the power flow from the power grid 110 to the home facility 10 and the reverse power flow from the home facility 10 to the power grid 110 based on the power information received from the power meter 180. The local control device 16 may specify the output power of the solar power generation device 11 based on the power information received from the power meter 181. The local control device 16 may specify the power consumption measured as a set of devices provided downstream of the solar power generation device 11 in the home facility 10 based on the power information received from the power meter 182.

[0034] Note that the local control device 16 may be able to specify the output power of the solar power generation device 11 based on the power information received from the solar power generation device 11. The local control device 16 may be able to specify the charging power or the discharging power of the power storage device 12 based on the power information received from the power storage device 12. The local control device 16 may be able to specify the output power of the fuel cell device 13 based on the power information received from the fuel cell device 13. The local control device 16 may be able to specify the power consumption of the load device 14 based on the power information received from the load device 14. The local control device 16 may be able to specify the charging power or the discharging power of the EV50 based on the power information received from the charging facility 15.

[0035] In FIG. 2, a case where the power storage device 12 and the fuel cell device 13 are provided in the home facility 10 is illustrated. However, at least one of the power storage device 12 and the fuel cell device 13 may not be provided in the home facility 10.

[0036] (Visiting facility) Hereinafter, the visiting facility 20 according to the embodiment will be described. Here, as an example of the visiting facility 20, the visiting facility 20A will be described. The visiting facility 20B and the visiting facility 20C may have the same configuration as the visiting facility 20A. As shown in FIG. 3, the visiting facility 20A includes a solar cell device 21A, a load device 24A, a charging facility 25A, and a local control device 26A. Further, the visiting facility 20A includes a wattmeter 280A, a wattmeter 281A, and a wattmeter 282A.

[0037] The solar cell device 21A is a distributed power source that generates electricity in response to light such as sunlight, similar to the solar cell device 11. The load device 24A is a device that consumes power, similar to the load device 14. The charging facility 25A is a facility that charges the EV50, similar to the charging facility 15. The local control device 26A is a device that manages the power of the visiting facility 20A, similar to the local control device 16.

[0038] For example, the charging facility 25A may have a wattmeter that measures at least one of the charging power of the EV50 and the discharging power of the EV50, similar to the charging facility 15. The charging facility 25A may transmit power information indicating at least one of the charging power of the EV50 and the discharging power of the EV50 to the local control device 26A.

[0039] The power meter 280A is an example of a backbone power meter that measures the power flow from the power grid 110 to the visited facility 20A and the reverse power flow from the visited facility 20A to the power grid 110, similar to the power meter 180. The power meter 281A is a power meter that measures the output power of the solar cell device 21A, similar to the power meter 181. The power meter 282A is a power meter that measures the power of a device installed downstream of the solar cell device 21A in the visited facility 20, similar to the power meter 182.

[0040] Under such a premise, the solar cell device 21A is an example of a power generation device that generates environmental value in the case where the output power of the solar cell device 21A is consumed at the visited facility 20A (so-called self-consumption). The environmental value may be a value for consideration of the global environment, such as the price of carbon dioxide (Carbon Pricing) that affects global warming. For example, the environmental value may be a value certified by a third-party institution. The environmental value may be certified by environmental values such as green power certificates and J-credits. In the embodiment, attention is paid to the attribution of the environmental value generated by the charging of the EV50 included in self-consumption.

[0041] The above-described local control device 26A may be able to identify the power flow from the power grid 110 to the visited facility 20A and the reverse power flow from the visited facility 20A to the power grid 110 based on the power information received from the power meter 280A. The local control device 26A may identify the output power of the solar cell device 21A based on the power information received from the power meter 281A. The local control device 26A may identify the power consumption measured as a set of devices installed downstream of the solar cell device 21A in the visited facility 20 based on the power information received from the power meter 282A.

[0042] Note that the local control device 26A may be able to specify the output power of the solar cell device 21A based on the power information received from the solar cell device 21A. The local control device 26A may be able to specify the power consumption of the load device 24A based on the power information received from the load device 24A. The local control device 26A may be able to specify the charging power or discharging power of the EV50 based on the power information received from the charging facility 25A.

[0043] In FIG. 3, a case where the energy storage device and the fuel cell device are not provided in the visited facility 20A is illustrated, but at least one of the energy storage device and the fuel cell device may be provided in the visited facility 20A.

[0044] (Management device) Hereinafter, the management device 30 according to the embodiment will be described. As shown in FIG. 4, the management device 30 includes a communication unit 31, a storage unit 32, and a control unit 33.

[0045] The communication unit 31 is composed of a communication module. The communication module may be a wireless communication module compliant with standards such as IEEE802.11a / b / g / n, ZigBee, Wi-SUN, LTE, or a wired communication module compliant with standards such as IEEE802.3.

[0046] The communication unit 31 constitutes a receiving unit that receives a message including at least a first information element and a second information element when the EV50 is charged by the output power output from the power generation device (solar cell device 11 or solar cell device 21A). The communication unit 31 may receive a message from a predetermined facility. The communication unit 31 may receive a message from the EV50 when the EV50 is capable of communicating with the management device 30. The first information element is an information element that identifies the rights holder regarding the EV50. The second information element is an information element that identifies the rights holder regarding the power generation device. For example, the message may be received when the charging of the EV50 is completed. The message may be generated according to the format shown in FIG. 5 described later.

[0047] The right holder of the EV50 may be the owner of the EV50, or may be the borrower, lender, or administrator of the EV50.

[0048] The right holder of the EV50 may be indirectly identified by an information element (e.g., vehicle ID) that identifies the EV50. In such a case, the first information element may include the information element that identifies the EV50.

[0049] The right holder of the power generation device may directly or indirectly identify the entity to which the environmental value resulting from the charging from the power generation device to the EV50 belongs. Specifically, the right holder of the power generation device may be the right holder of a predetermined facility (home facility 10 or visiting facility 20) where the power generation device is installed. As described above, the right holder of the predetermined facility may be the owner of the predetermined facility, or may be the borrower, lender, or administrator of the predetermined facility. Alternatively, the right holder of the power generation device may be different from the right holder of the predetermined facility. For example, in the case where the power generation device is owned by a third party different from the right holder of the predetermined facility, the right holder of the power generation device may be the third party that owns the power generation device.

[0050] The right holder of the power generation device may be indirectly identified by an information element (e.g., facility ID) that identifies a predetermined facility (home facility 10 or visiting facility 20A). In such a case, the second information element may include the information element that identifies the predetermined facility. The right holder of the power generation device may be indirectly identified by an information element that identifies the charging facility (charging facility 15 or charging facility 25A) that executes the charging from the power generation device to the EV50. In such a case, the second information element may include the information element that identifies the charging facility. The right holder of the power generation device may be indirectly identified by an information element (e.g., power generation device ID) that identifies the power generation device (solar power generation device 11 or solar power generation device 21A). In such a case, the second information element may include the information element that identifies the power generation device.

[0051] For example, as shown in FIG. 5, the above-described message may include a header, a first information element, a second information element, a time information element, and a power information element.

[0052] The header includes the source and destination of the message. The first information element is an information element that identifies the rights holder regarding EV50. The second information element is an information element that identifies the rights holder regarding the power generation device. The time information element is an information element that identifies the time period during which charging from the power generation device to EV50 is performed. The power information element is an information element that identifies the self-consumption power during the time period when charging from the power generation device to EV50 is performed. Alternatively, the power information element is an information element that identifies the charging power from the power generation device to EV50. The power information element is an example of a third information element that identifies the self-consumption power of a predetermined facility.

[0053] In FIG. 5, a case where the time information element is included in the message is illustrated. However, when the time period during which charging from the power generation device to EV50 is performed can be identified by other means, the time information element may not be included in the message. Similarly, in FIG. 5, a case where the power information element is included in the message is illustrated. However, when the charging power from the power generation device to EV50 can be identified by other means, the power information element may not be included in the message.

[0054] The storage unit 32 is constituted by a memory such as a non-volatile memory and / or a storage medium such as an HDD (Hard Disc Drive), and stores various information.

[0055] The storage unit 32 stores the correspondence relationship between at least one of a predetermined facility and a power generation device and EV50 as a correspondence relationship for identifying the subject to which the environmental value belongs. The storage unit 32 stores the correspondence relationship between the charging facility and EV50 as a correspondence relationship for identifying the subject to which the environmental value belongs. For example, the storage unit 32 stores the correspondence relationship shown in FIG. 6 or FIG. 7.

[0056] As shown in FIG. 6 or FIG. 7, the storage unit 32 stores the correspondence relationship among the charged subject, the charging subject, and the subject to which the environmental value belongs.

[0057] The charged entity is an entity charged by self-consumed electric power. In the embodiment, attention is paid to the case where the charged entity is the EV50, and the charged entity may be specified by the first information element described above.

[0058] The charging entity is an entity that charges by self-consumed electric power. In the embodiment, the charging entity may include a predetermined facility, a power generation device, or a charging facility. When the information element that indirectly specifies the attribution entity is the rights holder related to the power generation device, the charging entity may be considered as the information element specified by the second information element described above.

[0059] The attribution entity is the attribution entity of the environmental value generated by charging from the power generation device to the EV50. When the rights holder related to the power generation device is the information element that directly specifies the attribution entity, the attribution entity may be considered as the information element specified by the second information element described above.

[0060] For example, consider the case where the vehicle ID of the EV50 is "AAA", the facility ID of the home facility 10 is "aaa", and the facility ID of the visiting facility 20A is "bbb". The charging facility ID of the charging facility 15 is "Paaa", and the power generation device ID of the solar power generation device 11 is "Qaaa". The charging facility ID of the charging facility 25A is "Pbbb", and the power generation device ID of the solar power generation device 21A is "Qbbb". Further, assume that the attribution entity of the environmental value generated by charging the EV50 by the self-consumed electric power of the home facility 10 is "XXX". "XXX" may be the owner, lessee, lessor, or administrator of the home facility 10, or may be the owner, lessee, lessor, or administrator of the solar power generation device 11. "XXX" may be the owner, lessee, lessor, or administrator of the charging facility 15. "XXX" may be the management entity (management device 30) of the home facility 10.

[0061] In such a case, the entity to which the environmental value generated by charging the EV50 with the self-consumed power of the visited facility 20A belongs may be "XXX" as shown in FIG. 6, or may be "YYY" different from "XXX" as shown in FIG. 7. "YYY" may be the owner, lessee, lessor, or administrator of the visited facility 20A, or may be the owner, lessee, lessor, or administrator of the solar power generation device 21A. "YYY" may be the owner, lessee, lessor, or administrator of the charging facility 15.

[0062] Note that FIG. 6 may be considered to show a case where the entity to which the environmental value belongs is the same when the EV50 is used by one user, or may be considered to show a case where the entity to which the environmental value belongs is the same when the EV50 is used by two or more users. FIG. 7 may be considered to show a case where the entity to which the environmental value belongs is different when the EV50 is used by two or more users, or may be considered to show an example of a case where the entity to which the environmental value belongs is different when the EV50 is used by one user.

[0063] Here, the correspondence relationship between the combination of the entity to be charged and the charging entity and the entity to which the environmental value belongs can be arbitrarily set according to various factors such as the contractual relationship. The correspondence relationship stored in the storage unit 32 may be predetermined.

[0064] The control unit 33 may include at least one processor. The at least one processor may be constituted by a single integrated circuit (IC), or may be constituted by a plurality of circuits (such as integrated circuits and discrete circuits) communicably connected.

[0065] The control unit 33 identifies the entity to which the environmental value generated by the charging of the EV50 is attributed based on the first information element and the second information element. When the second information element (the rights holder related to the power generation device) is an information element that directly identifies the entity to which the attribution is made, the control unit 33 may identify the entity to which the attribution is made without using the correspondence relationship stored in the storage unit 32, or may identify the entity to which the attribution is made using the correspondence relationship stored in the storage unit 32. When the second information element (the rights holder related to the power generation device) is an information element that indirectly identifies the entity to which the attribution is made, the control unit 33 may identify the entity to which the attribution is made using the correspondence relationship stored in the storage unit 32.

[0066] Here, the control unit 33 may identify the entity to which the environmental value is attributed based on whether the first information element and the second information element satisfy the correspondence relationship stored in the storage unit 32. Specifically, when the combination of the first information element and the second information element is stored in the storage unit 32, the control unit 33 identifies the entity to which the attribution is made according to the correspondence relationship stored in the storage unit 32. On the other hand, when the combination of the first information element and the second information element is not stored in the storage unit 32, the control unit 33 does not identify the entity to which the attribution is made, assuming that the entity to which the attribution is made is unknown.

[0067] That is, by storing in advance in the storage unit 32 the correspondence relationship regarding the charging of the EV50 permitted as self-consumption, even when considering the mobility of the EV50, an appropriate identification of the entity to which the attribution is made is achieved.

[0068] (Self-consumption power) Hereinafter, the self-consumption power according to the embodiment will be described. Here, the self-consumption power of the home facility 10 will be described as an example. A case will be exemplified in which the power generation device that generates environmental value by self-consumption is the solar power generation device 11.

[0069] First, a case where there is power flow power (purchased power) from the power grid 110 to the home facility 10 will be described with reference to FIG. 8.

[0070] In such a case, the sum of the purchased power and the output power is equal to the sum of the power consumption of the load device 14 and the charging power of the EV 50. The purchased power is the power measured by the power meter 180 described above. The output power includes at least the output power of the solar cell device 11. When the energy storage device 12 is performing a discharging operation, the output power may include the discharging power of the energy storage device 12. The output power may include the output power of the fuel cell device 13. On the other hand, the power consumption includes the power consumption of the load device 14. When the energy storage device 12 is performing a charging operation, the power consumption may include the charging power of the energy storage device 12.

[0071] In the case shown in FIG. 8, the self-consumption power may be calculated as the difference obtained by subtracting the purchased power measured by the power meter 180 from the power consumption measured by the power meter 182. When the energy storage device 12 is performing a discharging operation, the power consumption measured by the power meter 182 is a value obtained by subtracting the sum of the discharging power of the energy storage device 12 and the output power of the fuel cell device 13 from the sum of the power consumption of the load device 14 and the charging power of the EV 50. On the other hand, when the energy storage device 12 is performing a charging operation, the power consumption measured by the power meter 182 is a value obtained by subtracting the sum of the output power of the fuel cell device 13 from the sum of the charging power of the energy storage device 12, the power consumption of the load device 14, and the charging power of the EV 50.

[0072] Here, the self-consumption power calculated by the method described above (hereinafter referred to as the calculated self-consumption power) is theoretically the same as the power measured by the power meter 181 (the output power of the solar cell device 11). Therefore, the power measured by the power meter 181 may be treated as the self-consumption power. However, due to measurement errors of the power meter 181 or the like, there is a possibility that the power measured by the power meter 181 does not match the calculated self-consumption power. In such a case, the smaller value of the power measured by the power meter 181 and the calculated self-consumption power may be treated as the self-consumption power.

[0073] Furthermore, when it is possible to obtain all of the output power of the solar power generation device 11, the charging power or discharging power of the power storage device 12, the output power of the fuel cell device 13, the power consumption of the load device 14, and the charging power of the EV 50, the self-consumption power may be calculated based on these parameters. Even in such a case, among the self-consumption powers calculated by various methods, the smallest value may be treated as the self-consumption power.

[0074] Second, a case where reverse power flow (power sold to the grid) from the home facility 10 to the power grid 110 exists will be described with reference to FIG. 9.

[0075] In such a case, the total output power is equal to the sum of the power sold to the grid, the power consumption, and the charging power of the EV 50. The power sold to the grid is the power measured by the power meter 180 described above. The output power includes at least the output power of the solar power generation device 11. When the power storage device 12 is performing a discharging operation, the output power may include the discharging power of the power storage device 12. The output power may include the output power of the fuel cell device 13. On the other hand, the power consumption includes the power consumption of the load device 14. When the power storage device 12 is performing a charging operation, the power consumption may include the charging power of the power storage device 12.

[0076] In the case shown in FIG. 9, the self-consumption power may be calculated as the difference obtained by subtracting the power sold to the grid measured by the power meter 180 from the power measured by the power meter 181 (the output power of the solar power generation device 11).

[0077] Here, the self-consumption power calculated by the method described above (hereinafter referred to as the calculated self-consumption power) is theoretically the same as the power consumption measured by the power meter 182. Therefore, the power consumption measured by the power meter 182 may be treated as the self-consumption power. However, due to measurement errors of the power meter 182 or the like, there is a possibility that the power consumption measured by the power meter 182 does not match the calculated self-consumption power. In such a case, the smaller value of the power consumption measured by the power meter 182 and the calculated self-consumption power may be treated as the self-consumption power.

[0078] Furthermore, when it is possible to obtain all of the output power of the solar cell device 11, the charging power or discharging power of the power storage device 12, the output power of the fuel cell device 13, the power consumption of the load device 14, and the charging power of the EV 50, the self-consumption power may be calculated based on these parameters. Even in such a case, among the self-consumption powers calculated by various methods, the smallest value may be treated as the self-consumption power.

[0079] The self-consumption power determined by the method as described above is used for the proof of environmental value. The self-consumption power determined by the method as described above may be used for the proof of environmental value such as green power certificates and J-credits.

[0080] (Power management method) Hereinafter, the power management method according to the embodiment will be described. Here, the self-consumption power of the home facility 10 will be described as an example.

[0081] As shown in FIG. 10, in step S11, the local control device 16 receives power information from the wattmeters 180 to 182. The reception process of the power information is repeated at a predetermined interval.

[0082] In step S12, the EV 50 is connected to the charging facility 15. The EV 50 may notify the charging facility 15 of the vehicle ID of the EV 50. The EV 50 may notify the local control device 16 of the vehicle ID of the EV 50. The charging facility 15 may notify the EV 50 of the charging facility ID of the charging facility 15.

[0083] In step S13, the charging facility 15 notifies the local control device 16 that the charging of the EV 50 has started. The charging facility 15 may notify the local control device 16 of the charging start time of the EV 50. The charging facility 15 may notify the local control device 16 of the vehicle ID of the EV 50.

[0084] In step S14, the local control device 16 monitors the power of the home facility 10. The local control device 16 monitors at least the power measured by the wattmeters 180 to 182.

[0085] In step S15, the connection between the EV 50 and the charging facility 15 is disconnected.

[0086] In step S16, the charging facility 15 notifies the local control device 16 that the charging of the EV 50 has ended. The charging facility 15 may notify the local control device 16 of the charging end time of the EV 50.

[0087] In step S17, the local control device 16 transmits a message (see FIG. 5) including at least a first information element and a second information element to the management device 30. As described above, the message may include a time information element. The message may include a power information element.

[0088] In step S18, the management device 30 confirms the attribution subject of the environmental value generated by the charging from the solar power generation device 11 to the EV 50. Specifically, the management device 30 confirms whether or not the correspondence relationship in which the first information element and the second information element are stored in the storage unit 32 is satisfied. Here, when the combination of the first information element and the second information element is stored in the storage unit 32, the management device 30 specifies the attribution subject according to the correspondence relationship stored in the storage unit 32. On the other hand, when the combination of the first information element and the second information element is not stored in the storage unit 32, the management device 30 does not specify the attribution subject as being unknown.

[0089] In step S19, when the attribution subject is specified, the management device 30 manages the specified attribution subject. The management device 30 manages the self-consumption power in the time zone when the charging from the solar power generation device 11 to the EV 50 is performed, together with the specified attribution subject. The management device 30 may manage the charging power from the solar power generation device 11 to the EV 50 as the self-consumption power.

[0090] In FIG. 10, the self-consumption power of the home facility 10 was described. However, the power management method shown in FIG. 10 can also be applied to the self-consumption power of the visiting facility 20A. That is, based on the combination of the first information element identifying the rights holder regarding the EV 50 and the second information element identifying the rights holder regarding the solar power generation device 21A, the subject to which the environmental value generated by the charging from the solar power generation device 21A to the EV 50 performed at the visiting facility 20A belongs may be identified. When the subject to which it belongs is identified, the environmental value is given to the identified subject to which it belongs.

[0091] (Function and Effect) In the embodiment, the management device 30 receives a message including the first information element and the second information element, and identifies the subject to which the environmental value generated by the charging from the power generation device to the EV 50 belongs based on the first information element and the second information element. According to such a configuration, even when considering the mobility of the EV 50, the subject to which it belongs can be identified.

[0092] In the embodiment, the management device 30 identifies the subject to which the environmental value generated by the charging from the power generation device to the EV 50 belongs based on whether the correspondence relationship in which the first information element and the second information element are stored in the storage unit 32 is satisfied. According to such a configuration, flexibility can be given to the method of determining the subject to which it belongs, and the subject to which it belongs can be appropriately identified.

[0093] [Embodiment 2] Hereinafter, Embodiment 2 of the embodiment will be described. Hereinafter, the differences from the embodiment will be mainly described.

[0094] In the embodiment, the case where the transmission subject of the message including the first information element and the second information element is the local control device 16 of the home facility 10 was described. On the other hand, in Embodiment 2, the case where the transmission subject of the message is the charging facility 15 will be described.

[0095] (Power Management Method) Hereinafter, the power management method according to Embodiment 2 will be described. Here, the home consumption power of the home facility 10 will be described as an example.

[0096] As shown in FIG. 11, in step S31, the local control device 16 receives power information from the power meters 180 to 182. The reception process of the power information is repeated at a predetermined interval.

[0097] In step S32, the EV 50 is connected to the charging facility 15. The EV 50 may notify the charging facility 15 of the vehicle ID of the EV 50. The charging facility 15 may notify the EV 50 of the charging facility ID of the charging facility 15.

[0098] In step S33, the charging facility 15 notifies the local control device 16 that the charging of the EV 50 has started. The charging facility 15 may notify the local control device 16 of the charging start time of the EV 50.

[0099] In step S34, the local control device 16 monitors the power of the home facility 10. The local control device 16 monitors at least the power measured by the power meters 180 to 182.

[0100] In step S35, the connection between the EV 50 and the charging facility 15 is disconnected.

[0101] In step S36, the charging facility 15 notifies the local control device 16 that the charging of the EV 50 has ended. The charging facility 15 may notify the local control device 16 of the charging end time of the EV 50.

[0102] In step S37A, the charging facility 15 transmits a message (see FIG. 5) including at least a first information element and a second information element to the management device 30. That is, the communication unit 31 of the management device 30 receives a message including at least a first information element and a second information element from the charging facility 15. As described above, the message may include a time information element. In FIG. 11, a case where the message does not include a power information element is illustrated.

[0103] In step S38, the management device 30 confirms the attribution entity of the environmental value generated by the charging from the solar power generation device 11 to the EV50. Specifically, the management device 30 confirms whether or not the correspondence relationship in which the first information element and the second information element are stored in the storage unit 32 is satisfied. Here, when the combination of the first information element and the second information element is stored in the storage unit 32, the management device 30 specifies the attribution entity according to the correspondence relationship stored in the storage unit 32. On the other hand, when the combination of the first information element and the second information element is not stored in the storage unit 32, the management device 30 does not specify the attribution entity as being unknown.

[0104] In step S39, the management device 30 inquires of the local control device 16 about the self-consumption power in the time period during which the charging from the solar power generation device 11 to the EV50 is performed. The management device 30 may inquire of the local control device 16 about the charging power from the solar power generation device 11 to the EV50. The management device 30 receives a message including a power information element (that is, the third information element) for specifying the self-consumption power of a predetermined facility from the local control device 16. That is, the message including the third information element may be different from the message including the first information element and the second information element.

[0105] In step S40, when the attribution entity is specified, the management device 30 manages the specified attribution entity. The management device 30 manages the self-consumption power in the time period during which the charging from the solar power generation device 11 to the EV50 is performed, together with the specified attribution entity. The management device 30 may manage the charging power from the solar power generation device 11 to the EV50 as the self-consumption power.

[0106] In FIG. 11, the self-consumption power of the home facility 10 was described. However, the power management method shown in FIG. 11 can also be applied to the self-consumption power of the visiting facility 20A. That is, based on the combination of the first information element that identifies the rights holder regarding the EV 50 and the second information element that identifies the rights holder regarding the solar power generation device 21A, the entity to which the environmental value generated by the charging from the solar power generation device 21A to the EV 50 performed in the visiting facility 20A belongs may be identified.

[0107] [Embodiment 3] Hereinafter, Embodiment 3 of the embodiment will be described. Hereinafter, the differences from the embodiment will be mainly described.

[0108] In the embodiment, the case where the transmission entity of the message including the first information element and the second information element is the local control device 16 of the home facility 10 was described. In contrast, in Embodiment 3, the case where the transmission entity of the message is the EV 50 will be described.

[0109] (Power Management Method) Hereinafter, the power management method according to Embodiment 3 will be described. Here, the self-consumption power of the home facility 10 will be taken as an example for explanation. In FIG. 12, the same steps as those in the flow shown in FIG. 11 are denoted by the same reference numerals. The description of the steps that are the same as those in the flow shown in FIG. 11 will be omitted.

[0110] In step S37B, the EV 50 transmits a message (see FIG. 5) including at least the first information element and the second information element to the management device 30. As described above, the message may include a time information element. In FIG. 12, a case where the message does not include a power information element is illustrated.

[0111] [Embodiment 4] Hereinafter, Embodiment 4 of the embodiment will be described. Hereinafter, the differences from the embodiment will be mainly described.

[0112] In the embodiment, a case where the charging power from the power generation device to the EV50 is treated as part of the self-consumption power was exemplified. On the other hand, in Embodiment 4, a case where the charging power from the power generation device to the EV50 is treated as measurable will be described.

[0113] (Home facility) Hereinafter, the home facility 10 according to Embodiment 4 will be described. In FIG. 13, the same components as those in FIG. 2 are denoted by the same reference numerals. The description of the same configuration as that in FIG. 2 will be omitted.

[0114] As shown in FIG. 13, the home facility 10 includes a wattmeter 190. The wattmeter 190 is provided upstream of the charging facility 15 and measures the charging power or discharging power of the EV50. The wattmeter 190 may be provided downstream of a device upstream of the charging facility 15 (in FIG. 13, the load device 14). The wattmeter 190 may be a wattmeter certified by a third-party institution.

[0115] Under such a configuration, within a range not exceeding the output power of the solar cell device 11 measured by the wattmeter 181, the charging power measured by the wattmeter 190 may be considered as the charging power from the power generation device to the EV50. That is, it may be considered that the self-consumption power of the home facility 10 is preferentially allocated to the EV50 rather than to devices other than the EV50 (for example, the load device 14). In such a case, the self-consumption power allocated to devices other than the EV50 (for example, the load device 14) is considered to be calculated as the difference obtained by subtracting the charging power to the EV50 from the self-consumption power of the home facility 10.

[0116] According to such a configuration, the charging power from the power generation device to the EV50 is measured by the wattmeter 190. Therefore, it is easy to flexibly set the attribution subject of the environmental value generated by charging from the power generation device to the EV50.

[0117] [Embodiment 5] Hereinafter, Embodiment 5 of the embodiment will be described. Hereinafter, the differences from the embodiment will be mainly described.

[0118] In the embodiment, when the combination of the first information element and the second information element is not stored in the storage unit 32, the management device 30 does not specify the attribution subject on the assumption that the attribution subject is unknown. In Embodiment 5, a case where the attribution subject is not specified, in other words, a case where the charging from the power generation device to the EV50 is not recognized as self-consumption will be described.

[0119] In Embodiment 5, when the charging of the third-party power storage device provided in the third-party moving body not belonging to the predetermined facility is performed by the output power output from the power generation device, if the charging of the third-party power storage device is not specified, the management device 30 does not specify the attribution subject of the environmental value, and if the charging of the third-party power storage device is specified, the management device 30 specifies the attribution subject of the environmental value. The case where the charging of the third-party power storage device is specified may include a case where the charging power of the third-party power storage device can be distinguished from other power consumption, a case where the attribution subject of the third-party power storage device is clear, and the like. The case where the charging of the third-party power storage device is not specified may include a case where the charging power of the third-party power storage device cannot be distinguished from other power consumption, a case where the attribution subject of the third-party power storage device is not clear, and the like.

[0120] For example, assume a case where charging from the solar power generation device 21A to the EV50 is performed when the predetermined facility is the visiting facility 20A. In such a case, the EV50 is an example of a third-party moving body not belonging to the visiting facility 20A. Therefore, the power storage device provided in the EV50 is an example of a third-party power storage device.

[0121] Under such a premise, the management device 30 specifies the attribution subject of the environmental value when the charging from the solar power generation device 21A to the EV50 is specified, but does not specify the attribution subject of the environmental value when the charging from the solar power generation device 21A to the EV50 is not specified.

[0122] Similar to the embodiment, as a case where the subject to which the environmental value belongs is not specified, a case where the combination of the solar power generation device 21A and the EV50 cannot be specified by the correspondence relationship stored in the storage unit 32 can be considered. Furthermore, cases where the subject to which the environmental value belongs is not specified include cases where the first information element for specifying the EV50 cannot be obtained, cases where the time period during which charging is performed from the solar power generation device 21A to the EV50 cannot be specified, and cases where the charging power from the solar power generation device 21A to the EV50 cannot be specified. In these cases, the charging power from the solar power generation device 21A to the EV50 may be treated as part of the self-consumption power of the visited facility 20A.

[0123] On the other hand, in a case where charging from the solar power generation device 21A to the EV50 is specified, the charging power from the solar power generation device 21A to the EV50 may be subtracted from the self-consumption power of the visited facility 20A. However, even in a case where charging from the solar power generation device 21A to the EV50 is specified, when power is being supplied from the power grid 110 to a predetermined facility, the environmental value of the self-consumption power of the predetermined facility is not calculated during the time when charging to the EV50 is being performed, and it may not be necessary to specify the subject to which the environmental value belongs.

[0124] [Embodiment 6] In the following, Embodiment 6 of the embodiment will be described. In the following, the differences from the embodiment will mainly be described.

[0125] In Embodiment 6, the creation of a message including at least the first information element and the second information element will be described. In the following, the visited facility 20A will be described as an example of the predetermined facility.

[0126] Regarding the message, it may be created by the local control device 26A provided in the predetermined facility. Regarding the message, as in Embodiment 2 described above, the charging facility 25A may create it, or as in Embodiment 3 described above, the EV50 may create it. The visited facility 20A that has obtained the first information element from the EV50 may create the message. The EV50 that has obtained the second information element from the visited facility 20A may create the message.

[0127] The message may be created when the charging of the EV50 is completed. The message may be created when the EV50 is connected to the charging facility 25A, when the charging of the EV50 is started, or when the connection between the EV50 and the charging facility 25A is disconnected, etc.

[0128] The connection between the EV50 and the charging facility 25A may be achieved by connecting the charging plug provided in the EV50 to the outlet of the charging facility 25A. By connecting the charging plug provided in the EV50 to the outlet of the charging facility 25A, a power line is formed between the EV50 and the charging facility 25A. By connecting the charging plug provided in the EV50 to the outlet of the charging facility 25A, a signal line is formed between the EV50 and the charging facility 25A.

[0129] As shown in FIG. 14, the detection unit 27A is provided on the power line and the signal line formed by the connection between the EV50 and the charging facility 25A. As shown in FIG. 15, the detection unit 27A includes a connection detection unit 271A and a charging detection unit 272A. The detection unit may be provided in the access facility 25A or may be provided in the EV50. The detection unit 27A detects the connection between the EV50 and the charging facility 25A or the charging of the EV50.

[0130] The connection between the EV50 and the charging facility 25A is detected by a connection detector 271A provided in a detector unit 27A. The connection detector 271A may be provided in either the EV50 or the charging facility 25A. The connection detector 271A may be provided on a power line or on a signal line. The connection detector 271A may be a current sensor provided in a charging plug or a socket. In this case, the connection detector 271A may determine that the EV50 and the charging facility 25A are connected when electricity flows through the charging plug or the socket. The connection detector 271A may be a switch provided in a charging plug or a socket. In this case, the connection detector 271A may determine that the EV50 and the charging facility 25A are connected when it is pressed. The connection detector 271A is not limited to these, and any device that can detect that the charging plug and the socket are in contact and in a state where electricity can be transferred may be used. Also, the connection detector 271A may determine that the EV50 and the charging facility 25A are connected when a power line or a signal line is formed between the EV50 and the charging facility 25A.

[0131] When the connection detection unit 271A determines that a connection has been made, it may transmit information indicating the connection to any one of the charging facility 25A, the local control device 26A, the EV 50, and the management device 30 (communication unit 31). The information indicating the connection may include information indicating the visited facility 20A and information indicating the EV 50. The charging facility 25A, the local control device 26A, the EV 50, and the management device 30 (communication unit 31) that have received the information from the connection detection unit 271A determine that the EV 50 and the charging facility 25A are connected. The connection detection unit 271A may transmit information indicating the connection to the charging facility 25A, the local control device 26A, the EV 50, and the management device 30 (communication unit 31) when any of the following cases occur: after the EV 50 is connected to the charging facility 25A and the charging of the EV 50 is started, when the connection between the EV 50 and the charging facility 25A is disconnected, or when the charging of the EV 50 is completed. Further, when the connection between the EV 50 and the charging facility 25A is disconnected, the connection detection unit 271A may transmit information indicating the disconnection to the charging facility 25A, the local control device 26A, the EV 50, and the management device 30 (communication unit 31).

[0132] The charging of the EV 50 is detected by a charging detection unit 272A provided in the detection unit 27A. The charging detection unit 272A may be provided in either the EV 50 or the charging facility 25A. The charging detection unit 272A may be provided on the power line. The charging detection unit 272A may be a current sensor provided in the charging plug or the outlet. The charging detection unit 272A may detect the charging from the power generation device provided in the visited facility 20A to the EV 50.

[0133] In this case, the charging detection unit 272A may determine that the EV50 is being charged when electricity is flowing through the charging plug or the outlet. The charging detection unit 272A may determine that the charging of the EV50 has started when electricity starts to flow through the charging plug or the outlet. The charging detection unit 272A may determine that the charging of the EV50 has ended when the electricity flow through the charging plug or the outlet stops. The charging detection unit 272A may determine that the charging of the EV50 has ended when the amount of current flowing within a certain period of time becomes equal to or less than a predetermined threshold value.

[0134] When the charging detection unit 272A determines that the charging has started, it may transmit information indicating that the charging has started to any one of the charging facility 25A, the local control device 26A, the EV50, and the management device 30 (communication unit 31). The information indicating that the charging has started may include information indicating the visited facility 20A and information indicating the EV50. The charging facility 25A, the local control device 26A, the EV50, and the management device 30 (communication unit 31) that have received the information from the charging detection unit 272A determine that the charging between the EV50 and the charging facility 25A has started.

[0135] When the charging detection unit 272A determines that the charging has ended, it may transmit information indicating that the charging has ended to any one of the charging facility 25A, the local control device 26A, the EV50, and the management device 30 (communication unit 31). The information indicating that the charging has ended may include information indicating the visited facility 20A and information indicating the EV50. The charging facility 25A, the local control device 26A, the EV50, and the management device 30 (communication unit 31) that have received the information from the charging detection unit 272A determine that the charging between the EV50 and the charging facility 25A has ended.

[0136] When the charging detection unit 272A determines that charging has ended, it may transmit information specifying the charging power from the power generation device to the EV 50 to any one of the charging facility 25A, the local control device 26A, the EV 50, and the management device 30 (communication unit 31). The information for specifying the charging power may be a power information element that is an information element for specifying the self-consumption power in the time period during which charging from the power generation device to the EV 50 is performed, which will be described later. Alternatively, it may be the amount of charge charged from the power generation device to the EV 50.

[0137] Next, for example, consider the case where the local control device 26A creates a message. In this case, the receiving unit (communication unit 31) provided in the management device 30 receives the message from a predetermined facility.

[0138] The local control device 26A acquires the first information element of the EV 50 from the EV 50. The local control device 26A may acquire the first information element of the EV 50 via the signal line between the EV 50 and the charging facility 25A. The local control device 26A may acquire the first information element of the EV 50 via the connection between the charging plug and the outlet. The local control device 26A may acquire the first information element of the EV 50 when the charging of the EV 50 is completed. The local control device 26A may acquire the first information element of the EV 50 when the EV 50 is connected to the charging facility 25A or when the charging of the EV 50 is started.

[0139] The local control device 26A may create a message based on the information acquired from the EV 50. The local control device 26A may create a message by combining the first information element acquired from the EV 50 and the second information element managed by the charging facility 25A or the local control device 26A. When the charging of the EV 50 is completed, the local control device 26A may transmit the message to the receiving unit (communication unit 31) provided in the management device 30.

[0140] The message may be created when the charging of EV50 is completed. In this case, the local control device 26A may acquire information specifying the charging power from the power generation device to EV50. The local control device 26A may transmit the message including the information specifying the charging power from the power generation device to EV50 to the receiving unit (communication unit 31) provided in the management device 30. By including the information specifying the charging power from the power generation device in the message, the local control device 26A can grasp the transaction volume of environmental value simultaneously with the identification of the attribution entity.

[0141] The local control device 26A may directly or indirectly calculate and acquire the information specifying the charging power from the information it manages. Also, the local control device 26A may acquire the information specifying the charging power from at least one of the solar power generation device 21A, the wattmeter 280A, the wattmeter 281A, the wattmeter 282A, and the charge detection unit 272A. The local control device 26A may acquire the information specifying the charging power by calculating based on the information obtained from them.

[0142] The message may be created when EV50 is connected to the charging facility 25A or when the charging of EV50 is started. In this case, the local control device 26A may include in the message a time information element which is an information element specifying the time zone during which the charging to EV50 is performed. Also, in this case, the local control device 26A may transmit the message to the receiving unit (communication unit 31) provided in the management device 30 without including the information specifying the charging power in the message.

[0143] In this case, when the charging of the EV50 is completed, the local control device 26A may transmit a message including information specifying the charging power from the power generation device to the EV50 to the receiving unit (communication unit 31) provided in the management device 30. At this time, the local control device 26A may include a time information element in the message including information specifying the charging power from the power generation device to the EV50. In this way, by including the time information element in both the previously sent message and the message including information specifying the charging power sent later, even when messages are sent separately, the control unit can identify the subject to which it belongs.

[0144] As described above, since the local control device 26A can acquire the first information element of the EV50 connected to the charging facility 25A via the connection between the charging facility 25A and the EV50, even if the location of the EV50 changes due to the movement of the EV50, the local control device 26A can create a message used to identify the subject to which it belongs.

[0145] Even when the charging facility 25A creates a message, similar to the example of the local control device 26A described above, the charging facility 25A may acquire the first information element of the EV50 via the connection between the charging facility 25A and the EV50. In this case, the charging facility 25A may create a message by combining the first information element acquired from the EV50 and the second information element managed by the charging facility 25A or the local control device 26A.

[0146] Even when the EV50 creates a message, similar to the example of the local control device 26A described above, via the connection between the charging facility 25A and the EV50, the EV50 may acquire the second information element managed by the charging facility 25A or the local control device 26A from the charging facility 25A or the local control device 26A. The EV50 may create a message by combining the second information element acquired from the charging facility 25A or the local control device 26A and the first information element managed by the EV50.

[0147] As described above, when the visiting facility 20A and the EV50 are connected, the visiting facility 20A or the EV50 can obtain the first information element or the second information element managed by the connection partner via the connection between the charging facility 25A and the EV50. Thus, even if the location of the EV50 changes due to movement, a message used to identify the attribution entity can be created.

[0148] The above example of the visiting facility 20A may be similarly applied even when a predetermined facility (the home facility 10 or the visiting facility 20) and the EV50 are connected. The predetermined facility (the home facility 10 or the visiting facility 20) may also have a configuration similar to the detection unit 27A, the connection detection unit 271A, and the charging detection unit 272A provided in the visiting facility 20A.

[0149] [Other Embodiments] Although the present invention has been described by the above-described embodiments, the discussions and drawings forming a part of this disclosure should not be understood as limiting this invention. Various alternative embodiments, examples, and operation techniques will be apparent to those skilled in the art from this disclosure.

[0150] In the embodiment, the case where the moving body is the EV50 has been exemplified. However, the embodiment is not limited to this. The moving body is assumed to move from the home facility 10 to the visiting facility 20, and any object having a power storage device may be used. The capacity of the power storage device is arbitrary.

[0151] In the embodiment, the case where the power generation device that generates environmental value by self-consumption is the solar power generation device (the solar power generation device 11 or the solar power generation device 21A) has been exemplified. However, the embodiment is not limited to this. The power generation device that generates environmental value by self-consumption may be a power generation device that outputs power by renewable energy. For example, the power generation device that generates environmental value by self-consumption may include one or more power generation devices selected from a wind power generation device, a hydro power generation device, a geothermal power generation device, and a biomass power generation device.

[0152] Although not particularly mentioned in the embodiments, a power storage device provided in a predetermined facility may be treated as a power generation device that generates environmental value through self-consumption. In such a case, the type of power used for charging the power storage device (for example, power grid, solar cell device, fuel cell device, etc.) may be identifiable.

[0153] Although not particularly mentioned in the embodiments, a fuel cell device may be treated as a power generation device that generates environmental value through self-consumption. In such a case, the environmental value generated by the self-consumption of the output power of the fuel cell device may be managed separately from the environmental value generated by the self-consumption of the output power of the solar cell device.

[0154] In the embodiments, a case where reverse power flow is not recognized for the discharge power of the power storage device is illustrated. However, the embodiments are not limited to this. Reverse power flow may be recognized for the discharge power of the power storage device.

[0155] In the embodiments, a case where reverse power flow is not recognized for the discharge power of the fuel cell device is illustrated. However, the embodiments are not limited to this. Reverse power flow may be recognized for the discharge power of the fuel cell device.

[0156] Although not particularly mentioned in the embodiments, the charging facility 15, the local control device 16, the charging facility 25A, the local control device 26A, and the management device 30 may synchronize their times with a time server. The time server may be an NTP (Network Time Protocol) server or a GPS (Global Positioning System) server (satellite).

[0157] Although not mentioned in terms in the embodiments, the self-consumption power of the home facility 10 may be corrected by the transmission loss that occurs in the power line between the power generation device and the EV50. For example, the transmission loss may be specified by the length of the power line between the power generation device and the EV50.

[0158] In the embodiment, the case where the local control device is provided in a predetermined facility is exemplified. However, the embodiment is not limited to this. The local control device may be provided by a cloud service.

[0159] Although not particularly mentioned in the embodiment, the electric power may be an instantaneous value (kW) or an integrated value per unit time (kWh).

[0160] Note that the entire contents of Japanese Patent Application No. 2019-238536 (filed on December 27, 2019) are incorporated herein by reference.

Claims

1. a control unit that determines, when a power storage device provided in a mobile object is charged, whether or not to award an environmental value resulting from the charging of the power storage device based on the output power of the power generation device; The control unit, when a right holder relating to the mobile body and a right holder relating to the power generation device are associated with an attribution entity, grants the environmental value to the attribution entity.

2. The power management system according to claim 1 , wherein the environmental value is electricity included in private power consumption of a facility having the power generation device, and is a value generated by charging the power storage device.

3. A method for charging a power storage device provided in a mobile object, the method comprising: a step A of determining whether or not to grant an environmental value resulting from charging of the power storage device based on an output power of a power generation device; The power management method includes a step of not granting the environmental value when the rights holder for the mobile body and the rights holder for the power generation equipment are not associated with the attribution entity, and granting the environmental value to the attribution entity when the rights holder for the mobile body and the rights holder for the power generation equipment are associated with the attribution entity.

Images