Power supply system and power management method

Abstract

To provide a power supply system and a power management method capable of providing benefits of in-house power generation by a distributed power supply including a portable storage battery to both an owner of a complex facility and a plurality of power supply destinations in the complex facility.SOLUTION: A power supply system that is interconnected with a power system and supplies power to a complex facility that includes a plurality of power supply destinations includes: a power converter that is provided in at least one power supply destination of the plurality of power supply destinations, converts supplied power supplied from the power system into charging power to a portable storage battery, and converts surplus power of the portable storage battery, and outputs to the power system; a power meter that measures the supplied power supplied from the power system to the power converter when the portable storage battery is connected to the power converter or measures the converted surplus power output from the power converter to the power system; and a management device that calculates a billing charge and a reduction charge for use of the portable storage battery according to a predetermined charge plan, based on the power value measured by the power meter.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a power supply system that supplies power to a complex facility including a plurality of power supply destinations, and a power management method using the power supply system. [Background technology]

[0002] In recent years, power supply systems equipped with distributed power sources such as storage batteries and solar cells and interconnected to commercial power grids have become widespread. Among these, a power supply system that supplies power to a complex facility including multiple power supply destinations is known, which is a power supply system for a complex consumer facility that has a low-voltage bulk power receiving contract for power less than that required for a high-voltage bulk power receiving contract, and which includes a bulk power receiving panel that receives power from the grid, a host metering device that measures the amount of power consumed by the complex consumer facility, a distribution panel that supplies the power received by the bulk power receiving panel to multiple consumer facilities within the complex consumer facility, and a distributed power source that can supply power to the multiple consumer facilities.

[0003] Such power supply systems are designed to reduce electricity charges when receiving power in bulk. However, the reduction in electricity charges in these systems does not necessarily provide the benefits of self-generation using distributed power sources to both the owner of the complex and the multiple power recipients in the complex. For example, when residents of a complex use portable storage batteries such as electric vehicles (EVs) or plug-in hybrid vehicles (PHVs), there is no system for measuring the amount of power received and sold by the portable batteries and linking it to the user for settlement. This leaves issues regarding the convenience and economic viability of the service when using portable storage batteries. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-187451 [Patent Document 2] International Publication No. 2014 / 123456 [Patent Document 3] JP 2016-119737 A (Patent No. 6436759 A) Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention has been made in consideration of the above-mentioned circumstances, and its purpose is to provide a power supply system that supplies power to a complex facility including multiple power supply destinations, and a power management method, which can provide the benefits of private power generation using distributed power sources including portable storage batteries to both the owner of the complex facility and the multiple power supply destinations in the complex facility. [Means for solving the problem]

[0006] One aspect of the disclosed technology for solving the above problem is: An electric power supply system that is connected to an electric power grid and supplies electric power to a complex facility including a plurality of power supply destinations, a power converter that is provided at at least one of the plurality of power supply destinations, and that converts supply power supplied from the power grid into charging power for a portable storage battery, and converts surplus power of the portable storage battery and outputs the surplus power to the power grid; a power meter that measures the power supplied from the power grid to the power converter when a portable storage battery is connected to the power converter, or measures the surplus power after conversion that is output from the power converter to the power grid; a management device that calculates a billing fee and a rebate fee for use of the portable storage battery in accordance with a predetermined rate plan based on the power value measured by the power meter; The present invention is characterized by comprising:

[0007] As a result, the power supply system can convert power supplied from the power grid into charging power for the portable storage battery connected to the V2H 121, a power converter installed in the private area 120 of the apartment complex 1a. It can also convert surplus power from the portable storage battery connected to the V2H 121 and provide it to the power grid. The same applies to the V2H 131 installed in the common area 130. The power supply system can measure the power supplied by the portable storage battery during charging and the power output to the grid based on the surplus power via smart meters 11f and 11g, which are power meters. The management device can calculate the billing fees and rebate fees for the use of the portable storage battery according to a predetermined rate plan based on the power values ​​measured via the smart meters 11f and 11g. The power supply system provides technology that can provide the benefits of private power generation using distributed power sources, including portable storage batteries, to both the owner of the complex and multiple power recipients within the complex.

[0008] In one embodiment of the disclosed technology, the management device may issue a storage battery ID for identifying a portable storage battery associated with the power converter before the power converter is used, and register the storage battery ID issued to the portable storage battery. The power supply system can manage the use of the portable storage battery connected to the power converter based on the storage battery ID issued to the portable storage battery. For example, the portable storage battery can be used (power buying and selling) via a power converter provided in the common area 130, improving convenience.

[0009] In one embodiment of the disclosed technology, when connecting a portable storage battery to the power converter, the management device may perform authentication based on a storage battery ID issued to the portable storage battery and register the storage battery ID of the authenticated portable storage battery. Authentication using the storage battery ID allows the user using the power converter to be identified, which is expected to simplify management. Furthermore, since the storage battery ID can be registered, the use of the portable storage battery via the power converter can be appropriately managed.

[0010] In one embodiment of the disclosed technology, the management device may share the battery ID issued to the portable battery with other complex facilities that are equipped with the power converter, and enable use of the power converters equipped in the other complex facilities based on the shared battery ID. This allows the portable battery to be used in other properties that share the battery ID, improving convenience and increasing the property value of the apartment complex 1a. This also increases the economic efficiency of residents who own portable batteries. In one embodiment of the disclosed technology, the management device may have a special rate plan for use in disasters, and calculate a billing fee and a rebate fee for use of the portable storage battery during the disaster based on the special rate plan and the power value measured by the power meter. This makes it possible to differentiate (by charging a surcharge, discount, etc.) the use of the portable storage battery under the disaster rate plan during disasters from normal times, and is expected to increase the community contribution of the owner of the apartment complex 1a.

[0011] Furthermore, another aspect of the disclosed technology is: A power management method executed by a management device of a power supply system that is connected to a power grid and supplies power to a complex facility including a plurality of power supply destinations, comprising: The power supply system includes: a power converter that is provided at at least one of the plurality of power supply destinations, and that converts supply power supplied from the power grid into charging power for a portable storage battery, and converts surplus power of the portable storage battery and outputs the surplus power to the power grid; When the portable storage battery is connected to the power converter, power is supplied from the power grid to the power converter. a power meter that measures the power supplied to the power converter or measures the surplus power after conversion that is output from the power converter to the power grid, causing the management device to calculate a billing fee and a rebate fee for use of the portable storage battery in accordance with a predetermined rate plan based on the power value measured by the power meter; A power management method comprising:

[0012] Even in this configuration, the power supply system can convert power supplied from the power grid to charging power for a portable storage battery connected to a power converter, V2H 121, installed in the private area 120 of the apartment complex 1a. It can also convert surplus power from the portable storage battery connected to V2H 121 and provide it to the power grid. The same applies to V2H 131 installed in the common area 130. The power supply system can measure the power supplied by the portable storage battery during charging and the power output to the grid based on the surplus power using smart meters 11f and 11g, which are power meters. The management device can calculate the billing fees and rebate fees for the use of the portable storage battery according to a predetermined rate plan based on the power values ​​measured by smart meters 11f and 11g. The power supply system provides technology that can provide the benefits of private power generation using distributed energy sources, including portable storage batteries, to both the owner of the complex and multiple power recipients within the complex. [Effects of the Invention]

[0013] According to the present invention, it is possible to provide a technology that can provide the benefits of private power generation using distributed power sources including portable storage batteries to both the owner of a complex facility and multiple power supply destinations in the complex facility. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a block diagram showing a schematic configuration of a power supply system 1 according to an embodiment of the present invention. [Figure 2] FIG. 2 is a diagram illustrating an example of a hardware configuration of a management device according to an embodiment of the present invention. [Figure 3] FIG. 2 is a block diagram illustrating an example of a functional configuration of a management device according to an embodiment of the present invention. [Figure 4] 10 is a flowchart illustrating an example of a usage setting registration process of the management device according to an embodiment of the present invention. [Figure 5]10 is a flowchart illustrating an example of an ID registration process for a portable storage battery in a management device according to an embodiment of the present invention. [Figure 6] 10 is a flowchart illustrating an example of a usage authentication process for using a portable storage battery in which a storage battery ID of a management device according to an embodiment of the present invention is registered. [Figure 7] 10 is a flowchart illustrating an example of a fee calculation process that reflects the usage record of the portable storage battery in the management device according to an embodiment of the present invention. [Figure 8] 10 is a flowchart illustrating an example of a fee calculation process including a usage record of a portable storage battery via another property in a management device according to an embodiment of the present invention. [Figure 9] 10 is a flowchart illustrating an example of a usage setting process in the event of a disaster in the management device according to an embodiment of the present invention. [Figure 10] 10 is a flowchart illustrating an example of a fee calculation process including a usage record of a portable storage battery when another property is used in the event of a disaster, performed by the management device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] [Application example] Hereinafter, application examples of the present invention will be described with reference to the drawings. 1 is a block diagram showing a schematic configuration of a power supply system 1 according to an application example of the present invention. The power supply system 1 according to this application example is a system applied to an apartment building 1a, which is an example of a complex facility including a plurality of power supply destinations, and is configured to supply distributed power such as solar cells, wind power generators, and so-called V2H (Vehicle to Home) power sources (portable storage batteries) and storage batteries. The power supply system 1 has a management device 2 outside the apartment building 1a that is configured to be able to communicate with the system inside the apartment building 1a. Wireless communication is possible between the system inside the apartment building 1a and the management device 2 via an LTE router 6. The management device 2 is also connected via a communication network N to information processing devices such as PCs / smartphones 30 owned by users of the private areas, and is also connected to management devices installed in other bulk power receiving systems 50 outside the apartment building 1a. The management device 2 has a database 20 that stores portable battery management information.

[0016] A power supply system 1 according to an application example of the present invention includes a storage battery 14 and a solar cell 15 as distributed power sources. A storage battery power conditioner 16 is connected to the storage battery 14. The storage battery 14 includes a bidirectional DC / DC converter that raises and lowers the charging / discharging voltage, and a DC / AC converter that converts the voltage related to charging / discharging the storage battery from DC to AC. The power output from the storage battery power conditioner 16 is measured by a smart meter 11e. Meanwhile, a solar cell power conditioner 17 is connected to the solar cell 15. The solar cell power conditioner 17 includes a DC / DC converter that adjusts the voltage generated by the solar cell 15, a control circuit for performing MPPT control using the hill-climbing method, and a DC / AC converter that converts the output voltage of the solar cell 15 from DC to AC. The solar cell power conditioner 17 is also connected to the storage battery power conditioner 16, allowing the power generated by the solar cell 15 to be directly charged to the storage battery 14.

[0017] Furthermore, in this application example, EV / PHV 122, which is a portable storage battery connected to V2H 121 via smart meter 11f, and EV / PHV 132, which is connected to V2H 131 via smart meter 11g, can have power purchased from grid 3, thereby enabling charging of the portable storage batteries. Then, EV / PHV 122, which is a portable storage battery connected to V2H 121 via smart meter 11f, and EV / PHV 132, which is connected to V2H 131 via smart meter 11g, can sell surplus power to grid 3. In this application example, the buying and selling of power between grid 3 and EV / PHV 122 or EV / PHV 132, which are portable storage batteries, via bidirectional smart meter 11f or smart meter 11g is configured to be performed based on the registration IDs of the portable storage batteries registered in advance in management device 2.

[0018] In the power supply system 1 according to this application example, the management device 2 stores in the database 20 information on usage settings, information on rate plans, information on disaster rate plans, registration information, and information on usage history as portable battery management information for portable storage batteries (EV / PHV 122, EV / PHV 132, etc.) for which IDs have been registered. The registration (assignment of IDs) of the portable storage batteries (EV / PHV 122, EV / PHV 132, etc.) is performed by operation input on the user terminal (PC / smartphone 30) of a user (user of the private unit 120 or the common unit 130) connected via the communication network N. Then, as shown in FIGS. 4 to 10 , the management device 2 provides users with an electricity buying and selling service for the ID-registered portable storage batteries connected via the private unit 120 or the common unit 130, based on the information on usage settings, information on rate plans, information on disaster rate plans, information on usage history, and the like stored in the database 20. The management device 2 is also connected to management devices provided in other bulk power receiving systems 50 outside the apartment building 1a via the communication network N. The management device 2 accepts requests from management devices provided in other bulk power receiving systems 50 connected via the communication network N, and provides users with a power buying and selling service for ID-registered portable storage batteries based on information on usage settings, rate plans, disaster rate plans, usage history, and the like stored in the database 20. This makes it possible to provide a power supply system 1 that can provide the benefits of private power generation using distributed power sources including portable storage batteries to both the owner of the complex facility and multiple power supply destinations in the complex facility.

[0019] Example 1 Specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0020] <System configuration> FIG. 1 is a block diagram showing a schematic configuration of a power supply system 1 according to an embodiment of the present invention. The power supply system 1 according to this embodiment is a system applied to an apartment building 1a, which is an example of a complex facility including multiple power supply destinations. The system includes distributed power sources such as solar cells, wind power generators, and so-called vehicle-to-home (V2H) power sources (portable batteries) and storage batteries. In FIG. 1, solid lines connecting each block indicate power lines, and dashed lines connecting each block indicate communication lines (including wireless communication). The power supply system 1 according to this embodiment is connected to a grid 3. When the power supplied by the distributed power sources is less than the power consumed by the multiple power supply destinations, resulting in a power shortage, the system can purchase power from the grid 3, for example. When the power supplied by the distributed power sources is greater than the power consumed by the multiple power supply destinations, the system can sell surplus power to the grid 3, for example. The grid 3 may be a so-called retail electricity supplier or a general electricity supplier. The grid 3 may be composed of a combination of different electricity suppliers, or may be the same electricity supplier. In addition, EVs (Electric Vehicles) and PHVs (Plug-in Hybrid Vehicles) are given as examples of power sources for V2H, but FCVs (Fuel The fuel cell may be a fuel cell such as a Cell Vehicle.

[0021] The power supply system 1 according to this embodiment includes a management device 2 outside the apartment building 1a that is configured to be able to communicate with the system within the apartment building 1a. Wireless communication between the system within the apartment building 1a and the management device 2 is possible via an LTE router 6. The management device 2 may be, for example, a server device provided on a cloud by a management company that operates the power supply system 1. However, the management device 2 need not necessarily be provided on a cloud server, but may be connected via wired communication as long as it is capable of transmitting and receiving information between the system within the apartment building 1a and the power supply system 1. The management device 2 is also connected to an information processing device, such as a PC / smartphone 30, owned by a user of the private unit via a communication network N, and is also connected to a management device provided in another bulk power receiving system 50 outside the apartment building 1a. The communication network N may be a wired or wireless communication network. The management device 2 according to this embodiment includes a database 20 that stores portable battery management information. The portable battery management information stored in the database 20 will be described in detail below.

[0022] In FIG. 1, private areas 12a, 12b, 12c, etc. are assumed as multiple destinations of power supply from power supply system 1. These private areas 12a, 12b, 12c, etc. are, for example, the individual rooms (hereinafter also referred to as residents) in apartment building 1a. More specifically, the loads in private areas 12a, 12b, 12c, etc. are electrical appliances and the like in the individual rooms of apartment building 1a. In addition to private areas 12a, 12b, 12c, etc., apartment building 1a also has common area 13. This common area 13 is a common area in apartment building 1a, and possible loads in common area 13 include, for example, lighting 13a in a hallway or entrance, and a specific load distribution board 13b that can automatically supply power to pre-connected electrical appliances during a power outage, etc. The exclusive use areas 12a, 12b, 12c, etc. and the common use area 13 are each equipped with a smart meter 11a, 11b, 11c, etc., 11d, which makes it possible to measure the power consumed in the exclusive use areas 12a, 12b, 12c, etc. and the common use area 13.

[0023] The power supply system 1 is also equipped with a storage battery 14 and a solar cell 15 as distributed power sources. The storage battery 14 is connected to a storage battery power conditioner 16 including a bidirectional DC / DC converter that raises and lowers the charge / discharge voltage, and a DC / AC converter that converts the voltage related to the charge / discharge of the storage battery between direct current and alternating current. The power output from the storage battery power conditioner 16 is measured by a smart meter 11e. Meanwhile, the solar cell 15 is equipped with a DC / DC converter that adjusts the power generation voltage of the solar cell 15, a control circuit for performing MPPT control using the hill-climbing method, a solar cell power conditioner 16, and a solar cell power conditioner 16. A solar cell power conditioner 17 including a DC / AC converter that converts the output voltage of the battery 15 between DC and AC is connected. The power output from the solar cell power conditioner 17 is measured by a smart meter 11h. The solar cell power conditioner 17 is also connected to a storage battery power conditioner 16, so that the power generated by the solar cell 15 can be directly charged into the storage battery 14. Note that in this embodiment, a distributed power source in which the storage battery 14 and the solar cell 15 are integrated may also be used.

[0024] In the power supply system 1 shown in FIG. 1 , the storage battery power conditioner 16 and the solar cell power conditioner 17 are connected to a second distribution board 10 for distributed power sources. The second distribution board 10 is connected to a first distribution board 9 that distributes power to each of the private areas 12a, 12b, 12c, etc. and the common area 13. The first distribution board 9 is connected to the grid 3 via a master smart meter 4 capable of measuring power in both directions, that is, selling and purchasing power. The first distribution board 9 is then connected to an EV / PHV 122 constituting a portable storage battery via a V2H 121 provided in the private area 120 via a smart meter 11f capable of measuring power in both directions, that is, selling and purchasing power. Similarly, the first distribution board 9 is connected to an EV / PHV 132 constituting a portable storage battery via a V2H 131 provided in the common area 130 via a smart meter 11g capable of measuring power in both directions, that is, selling and purchasing power. Furthermore, the first distribution board 9 is connected to the outlets of the exclusive use areas 12a, 12b, 12c, etc. and the common area 13 via smart meters 11a, 11b, 11c, . . . , 11d, and 11e.

[0025] The V2H 121 provided in the exclusive unit 120 converts, for example, power (AC power) supplied from the grid 3 into charging power (DC power) for the EV / PHV 122, which is a portable storage battery. The V2H 121 also converts surplus power (DC power) supplied from the EV / PHV 122, which is a portable storage battery, into AC power and outputs the AC power to the grid 3 side. Similarly, the V2H 131 provided in the common unit 130 converts, for example, power (AC power) supplied from the grid 3 into charging power (DC power) for the EV / PHV 132, which is a portable storage battery, and converts surplus power (DC power) supplied from the EV / PHV 132 into AC power and outputs the AC power to the grid 3 side. The smart meter 11f connected to the V2H 121 measures power values ​​in the charging direction from the grid side to the EV / PHV 122 and in the power output direction from the EV / PHV 122 to the grid side. Furthermore, the smart meter 11g connected to the V2H 131 measures power values ​​in the charging direction from the grid side to the EV / PHV 132 and in the power output direction from the EV / PHV 132 to the grid side. In this embodiment, the smart meters 11f and 11g correspond to an example of a "power meter," and the V2H 121 and V2H 131 correspond to an example of a "power converter."

[0026] As a result, the power generated by the solar cell 15 and the power discharged from the storage battery 14 can be supplied to each of the exclusive areas 12a, 12b, 12c, etc. and the common area 13. At that time, if the power consumed by the loads in each of the exclusive areas 12a, 12b, 12c, etc. and the common area 13 is greater than the power supplied by the distributed power sources of the storage battery 14 and the solar cell 15, the shortfall is made up by purchasing power from the grid 3. Furthermore, if the power consumed by the loads in each of the exclusive areas 12a, 12b, 12c, etc. and the common area 13 is less than the power supplied by the distributed power sources of the storage battery 14 and the solar cell 15, the surplus can be sold to the grid 3.

[0027] Furthermore, in this embodiment, the EV / PHV 122, which is a portable storage battery connected to the V2H 121 through the smart meter 11f, and the EV / PHV 132, which is connected to the V2H 131 through the smart meter 11g, can have power purchased from the grid 3, thereby enabling charging of the portable storage batteries. Furthermore, the EV / PHV 122, which is a portable storage battery connected to the V2H 121 through the smart meter 11f, and the EV / PHV 132, which is connected to the V2H 131 through the smart meter 11g, can sell surplus power to the grid 3. In this embodiment, the bidirectional smart meter 11f or The purchase and sale of electricity between the portable storage batteries EV / PHV122 and EV / PHV132 and the grid 3 via the smart meter 11g is configured to be carried out based on the registration ID of the portable storage battery registered in advance in the management device 2.

[0028] The power consumption in the private units 12a, 12b, 12c, etc. and the common unit 13 measured by smart meters 11a, 11b, 11c, etc., information on the input / output power of the storage battery power conditioner 16 measured by smart meter 11e, and information on the output power of the solar cell power conditioner 17 measured by smart meter 11h are provided to the storage battery controller 5 as a control device via the gateway 8c and the hub 7. Similarly, information on the power purchased and sold for the EV / PHV 122 in the private unit 120 and the power purchased and sold for the EV / PHV 132 in the common unit 130 measured by smart meter 11f is provided to the storage battery controller 5 as a control device via the gateway 8c and the hub 7. The amount of power purchased from the grid 3 and the amount of surplus power sold to the grid 3 measured by the parent smart meter 4 are also provided to the storage battery controller 5. In addition, information such as the MPPT control status of the solar cell power conditioner 17, the terminal current value and voltage value of the solar cell 15, and the amount of electricity stored in the storage battery 14 are also provided to the storage battery controller 5 via the gateways 8a and 8b and the hub 7.

[0029] The battery controller 5 controls the input / output power of the battery power conditioner 16, the amount of power purchased from the grid 3, the amount of surplus power sold to the grid 3, etc., based on the power management policy of the facility owner, the power trading market price, the power consumption in each of the private units 12a, 12b, 12c, etc. and the common unit 13, the amount of power generated by the solar cell 15, the amount of power stored in the storage battery 14, etc. Similarly, the battery controller 5 controls the amount of power purchased from the grid 3, the amount of surplus power sold to the grid 3, etc., based on the power management policy of the facility owner, the power trading market price, the power purchased from and sold to the EV / PHV 122 in the private unit 120, and the power purchased from and sold to the EV / PHV 132 in the common unit 130, etc.

[0030] Furthermore, information on the power consumption in the private units 12a, 12b, 12c, etc. and the common unit 13, information on the input / output power of the battery power conditioner 16, and information on the output power of the solar cell power conditioner 17 measured by the smart meters 11a, 11b, 11c, etc. are provided to the management device 2 via the gateway 8c, the hub 7, and the LTE router 6. Similarly, information on the power purchased and sold for the EV / PHV 122 in the private unit 120 and the power purchased and sold for the EV / PHV 132 in the common unit 130 measured by the smart meter 11f is provided to the management device 2 via the gateway 8c, the hub 7, and the LTE router 6. The amount of power purchased from the grid 3 and the amount of surplus power sold to the grid 3 measured by the parent smart meter 4 are also provided to the management device 2. Furthermore, information such as the MPPT control state of the solar cell power conditioner 17, the terminal current and voltage value of the solar cell 15, and information such as the amount of electricity stored in the storage battery 14 are also provided to the management device 2 via the gateways 8a and 8b, the hub 7, and the LTE router 6. Here, information on the amount of electricity purchased from the grid 3 and the amount of surplus electricity sold to the grid 3 may be obtained from billing information from the electric power company, rather than being provided to the management device 2 from the smart meter.

[0031] In the power supply system 1 according to this embodiment, the management device 2 stores, in the database 20, information on usage settings, information on rate plans, information on disaster rate plans, registration information, and information on usage history as portable battery management information for portable storage batteries (EV / PHV 122, EV / PHV 132, etc.) for which IDs have been registered. The registration (assignment of IDs) of the portable storage batteries (EV / PHV 122, EV / PHV 132, etc.) is performed by operation input on the user terminal (PC / smartphone 30) of a user (user of the private unit 120 or the common unit 130) connected via the communication network N. Then, the management device 2 provides users with an electricity buying and selling service for the ID-registered portable storage batteries connected via the private unit 120 or the common unit 130, based on the information on usage settings, information on rate plans, information on disaster rate plans, information on usage history, etc. stored in the database 20.

[0032] Furthermore, in the power supply system 1 according to this embodiment, the management device 2 is connected via a communication network N to a management device provided in another bulk power receiving system 50 outside the apartment building 1a. The management device 2 accepts requests from the management devices provided in the other bulk power receiving systems 50 connected via the communication network N, and provides users with a power buying and selling service for ID-registered portable storage batteries based on information on usage settings, rate plans, disaster rate plans, usage history, and the like stored in the database 20. This makes it possible to provide a power supply system 1 that can provide the benefits of private power generation using distributed power sources including portable storage batteries to both the owner of a complex facility and multiple power supply destinations in the complex facility.

[0033] <Management device configuration> FIG. 2 is a diagram illustrating an example of a hardware configuration of a management device 2 according to this embodiment. As illustrated in FIG. 2, the management device 2 is a computer such as a server including, as components, a processor 201, a main memory device 202, an auxiliary memory device 203, a communication IF 204, and an input / output IF 205, which are interconnected by a connection bus 206. The main memory device 202 and the auxiliary memory device 203 are recording media readable by the management device 2. The main memory device 202 and the auxiliary memory device 203 constitute the memory of the management device 2. Each of the above components may be provided in multiple units, or some of the components may not be provided. Note that the management devices provided in the user terminal (PC / smartphone 30) and other bulk power receiving systems 50 are substantially realized with a configuration equivalent to the hardware configuration of the management device 2, and therefore, description thereof will be omitted.

[0034] The processor 201 is a central processing unit that controls the entire management device 2. The processor 201 is, for example, a CPU (Central Processing Unit) or a DSP (Digital Signal Processor). The processor 201 executes the program stored in the auxiliary storage device 203, for example. The management device 2 controls peripheral devices through the execution of a program stored in the auxiliary storage device 203. The database 20 is a relational database constructed by, for example, a database management system (DBMS) program executed by the processor 201 of the management device 2 managing data stored in the auxiliary storage device 203. Note that some or all of the functions may be implemented using an ASIC (Application Specific Integrated Circuit), a GPU (Graphics Processing Unit), or the like. Similarly, some or all of the functions may be provided by an FPGA. (Field-Programmable Gate Array), numerical processor, vector processor, image Dedicated LSI (large scale integration) for processors and other hardware circuits The management device 2 may be realized by a single physical configuration, or may be realized by a configuration of multiple computers that cooperate with each other.

[0035] The main memory device 202 stores programs executed by the processor 201, data processed by the processor, etc. The main memory device 202 includes a flash memory, a RAM (Random Access Memory), and a ROM (Read Only Memory). The auxiliary memory device 203 stores various programs and various data on a readable and writable recording medium. The auxiliary memory device 203 is also called an external memory device. The auxiliary memory device 203 stores, for example, an operating system (OS), various programs, various tables, etc. The OS includes, for example, a communication interface program that exchanges data with external devices, etc. connected via the communication IF 204. The external devices, etc. are, for example, management devices of other bulk power receiving systems 50 connected to the communication network N, computers such as information processing terminals including PCs / smartphones 30, external memory devices, etc.

[0036] The auxiliary storage device 203 is used as a storage area that supports the main storage device 202, and stores programs executed by the processor 201, data processed by the processor 201, etc. The auxiliary storage device 203 is a nonvolatile semiconductor memory (flash memory, EPROM (Erasable Read Only Memory) Silicon disks, including Programmable ROM, solid state drive devices, hard disks Hard disk drives (HDDs) and other devices. Examples of 03 include drives for removable recording media such as CD drives, DVD drives, and BD drives. Examples of removable recording media include CDs, DVDs, BDs, USB (Universal Serial Bus) memory, and SD (Secure Digital) memory cards.

[0037] The communication IF 204 is an interface for connecting the management device 2 to the communication network N. The communication IF 204 can have an appropriate configuration depending on the connection method with the communication network N. The input / output IF 205 is an interface for inputting and outputting data between the management device 2 and devices connected to the management device 2. Input devices such as a keyboard, a pointing device such as a touch panel or a mouse, and a microphone are connected to the input / output IF 205. The management device 2 receives operation instructions and the like from an operator who operates the input device via the input / output IF 205. In addition, output devices such as a display device such as an LCD, an EL panel, or an organic EL panel, a printer, or a speaker are connected to the input / output IF 205. The management device 2 outputs data and information processed by the processor 201 and data and information stored in the main memory device 202 and the auxiliary memory device 203 via the input / output IF 205.

[0038] <Functional configuration> Fig. 3 is a block diagram showing an example of the functional configuration of management device 2. As illustrated in Fig. 3, management device 2 includes an electricity fee calculation unit 2a that calculates electricity fees to be charged to private units 12a, 12b, 12c, etc. and common unit 13 based on information about the power consumption in private units 12a, 12b, 12c, etc. and common unit 13. Management device 2 also includes a rebate fee calculation unit 2b that calculates the rebate fee to be rebated to the facility owner by the management company that operates management device 2. Management device 2 also includes an electricity purchase fee calculation unit 2c that calculates the electricity purchase fee to be paid to the electric utility associated with grid 3 based on the amount of electricity purchased from grid 3, or stores the amount of the electricity purchase fee invoiced by the electric utility. Furthermore, the management device 2 has a usage setting registration unit 2d, a portable storage battery registration unit 2e, a usage authentication unit 2f, a portable storage battery fee calculation unit 2g, and an other property usage fee calculation unit 2h as functional elements related to the use of a portable storage battery (EV / PHV 122, EV / PHV 132, etc.) with a registered ID. Furthermore, the management device 2 has a disaster usage setting processing unit 2i and a disaster usage fee calculation unit 2j as functional elements related to the use of a portable storage battery with a registered ID during a disaster or the like. The processing of each functional element related to the use of the portable storage battery is provided based on power information related to the portable storage batteries (EV / PHV 122, EV / PHV 132, etc.) in the private unit 120 and the common unit 130, and the portable battery management information stored in the database 20. The following describes in detail the functional elements of the management device 2 related to the use of the portable storage battery.

[0039] (1) Usage setting registration section Fig. 4 is a flowchart showing an example of a usage setting registration process in the management device 2. In Fig. 4, table 20a is an example of information related to usage settings stored in database 20. Similarly, table 20b is an example of information related to rate plans, and table 20c is an example of information related to disaster rate plans. Through the flow shown in Fig. 4, settings of various conditions related to the use of portable batteries for bulk power receiving businesses are registered in database 20.

[0040] The table 20a illustrated in FIG. 4 has columns such as portable battery compatible, other property connection, disaster response, and disaster response in progress as setting items related to usage settings. The portable battery compatible column stores information on whether or not the target complex facility is compatible with portable batteries. Similarly, the other property connection column stores information on whether or not the target complex facility is using portable batteries via a management device provided in another collective power receiving system 50 connected via the communication network N. In the disaster response section, information regarding whether or not the portable storage battery can be used via the private section 120 or the common section 130 in the event of a disaster is stored. During disaster response, the current status of disaster response (ON / responding, OFF / not responding) is stored.

[0041] Similarly, table 20b has columns such as the unit price of electricity (yen per 1 kW) and conditions as setting items related to the rate plan. The unit price of electricity stores information indicating the unit price per unit of electricity (for example, 1 kW) related to the sale and purchase of electricity in the target complex. The conditions store information indicating the conditions for selling and purchasing electricity for the target complex. FIG. 4 illustrates an example rate plan in which the electricity rate for the complex is 25 yen / kWh and the electricity rate (normal rate) for the common area 130 or the exclusive area 120 is 30 yen / kWh. In addition, information indicating conditions such as "10% off the normal rate" as a condition related to selling electricity (charging a portable storage battery) and "50% of the normal rate" as a condition related to purchasing electricity (power supply from a portable battery) is illustrated.

[0042] Like table 20b, table 20c also has columns for setting items related to the disaster rate plan, such as the unit price of electricity (yen per 1 kW) and conditions. Fig. 4 shows an example of a disaster rate plan in which the rate for electricity purchased from the grid in the complex is 25 yen / kWh and the electricity rate (normal rate) for the common area 130 or the private area 120 is 30 yen / kWh. Information indicating conditions such as "20% off the normal rate" as a condition for selling electricity (charging a portable battery) during a disaster and "60% of the normal rate" as a condition for purchasing electricity (power supply from a portable battery) is stored.

[0043] 4, after the process starts, usage settings regarding portable battery compatibility via the private area 120, the common area 130, etc. in the complex are registered in table 20a (step S101), and the process proceeds to step S102. In the example of apartment complex 1a in FIG. 1, "Yes" is stored in the portable battery compatibility column of table 20a, and "Yes" is stored in the other property connection column.

[0044] In step S102, it is determined whether the complex facility is compatible with portable storage batteries, as stored in the portable storage battery compatible column of table 20a. That is, if "yes" is stored in the portable storage battery compatible column (step S102, "YES"), the process proceeds to step S103, and if not (step S102, "NO"), this routine is temporarily terminated.

[0045] In step S103, a setting is registered (table 20b) for a rate plan for buying and selling electricity between the portable storage battery and the grid 3 via the private area 120, the common area 130, etc. in the complex, and the process proceeds to step S104. In step S104, information regarding disaster response for the complex facility having the private area 120, the common area 130, etc. is registered in table 20a, and the process proceeds to step S105. The disaster response column in table 20a stores a status of either "yes" or "no," and when "yes" is registered, the disaster response in progress column stores a status of, for example, "off," which is the default value.

[0046] In step S105, it is determined whether the complex facility is equipped with a portable storage battery ("yes" / "no"), which is stored in the disaster response column of table 20a. That is, if "yes" is stored in the disaster response column (step S105, "YES"), the process proceeds to step S106, and if not (step S105, "NO"), this routine is temporarily terminated. In step S106, the setting and registration (table 20c) of the disaster rate plan for buying and selling electricity between the portable storage battery and the grid 3 via the private area 120, the common area 130, etc. of the complex facility in the event of a disaster is performed. After the processing of step S106 is completed, this The routine is terminated.

[0047] As described above, in the power supply system 1 according to this embodiment, the management device 2 can pre-register, with the bulk power receiving business operator, a rate plan for the use (purchase and sale) of portable storage batteries and a disaster rate plan for use in the event of a disaster. Furthermore, the management device 2 can pre-register, with the bulk power receiving business operator, whether or not portable storage batteries can be used in other properties (other bulk power receiving systems 50) connected via the communication network N. Setting a rate plan for the use of portable storage batteries enables the buying and selling of electricity via the private area 120 and the common area 130 of the apartment building 1a, thereby increasing the property value of the apartment building 1a and improving the economic efficiency of residents who own portable storage batteries. Furthermore, registering a disaster rate plan for use in the event of a disaster allows the use of portable storage batteries to be differentiated from normal times (by offering surcharges, discounts, etc.), thereby enhancing the contribution of the owner of the apartment building 1a to the community. Furthermore, by registering whether or not portable storage batteries can be used in other properties, it becomes possible, for example, for tenants to enjoy the same or similar electricity buying and selling services as those in the property they are occupying, even if the property is not occupied by a tenant.

[0048] (2) Portable Battery Registration Unit Next, an ID registration process for a portable storage battery will be described. FIG. 5 is a flowchart illustrating an example of the ID registration process in the management device 2. The flow illustrated in FIG. 5 performs ID registration for the portable storage battery of a resident of a room having a private area 120 in an apartment building 1a, which is an example of a complex facility, or a user who uses a common area 130 (hereinafter simply referred to as "user"). The ID registration process for the portable storage battery is performed via the user's PC / smartphone 30 connected to the management device 2 via the communication network N. When the management device 2 receives a predetermined access from the user via the PC / smartphone 30, it guides the user to a contract system previously established for the residents of the apartment building 1a and executes the flow illustrated in FIG. 5. Here, the predetermined access includes, for example, authentication information such as a user ID and password issued to the user when signing the tenancy contract. Screen 30a illustrated in FIG. 5 is an example of a screen displayed on the display screen of the PC / smartphone 30 before an ID (storage battery ID) is issued for the user's portable storage battery, and screen 30b is an example of a screen after the ID (storage battery ID) is issued. The table 20d1 is an example of registration information stored in the database 20.

[0049] After the process starts, a determination is made as to whether or not a portable storage battery can be registered for a user who has accessed the management device 2 via the PC / smartphone 30 (step S111). The management device 2, for example, displays a screen regarding whether or not to register a portable storage battery on the display screen of the PC / smartphone 30, and accepts a selection operation from the user. If registration of a portable storage battery is selected in step S111 (step S111, "yes"), the process proceeds to step S112; if not (step S111, "no"), this routine is temporarily terminated.

[0050] In step S112, storage battery registration is performed via screen 30a displayed on PC / smartphone 30. In storage battery registration, as illustrated on screen 30a, identification information for use in private area 120, common area 130, etc., such as the name, model, and capacity of the registered portable storage battery is accepted. Management device 2 displays an input screen (screen 30a) on the display screen of PC / smartphone 30 to prompt the user to enter identification information for identifying the portable storage battery, such as the name, model, and capacity. The user operates PC / smartphone 30 according to screen 30a displayed on the display screen, and inputs identification information such as the name, model, and capacity of the registered portable storage battery, as indicated by the dashed-dotted oval frame. In FIG. 5, the user enters identification information such as "electric vehicle" as the name indicating the type of portable storage battery, "AA01" as the model number of the portable storage battery, and "20 (kWh)" as the capacity. After inputting the identification information for identifying the portable storage battery, the user presses the execute button provided on the screen 30a to transmit the inputted and confirmed predetermined information to the management device 2. If the inputted identification information is not confirmed, the user can press the cancel button. By pressing the button, the identification information can be re-entered.

[0051] Returning to the flow shown in FIG. 5, in step S113, an ID is issued to the portable storage battery related to the registration accepted from the PC / smartphone 30 via the screen 30a. The management device 2 issues an ID (storage battery ID) to the portable storage battery, for example, on the condition that predetermined identification information (name, model, capacity, etc.) for the registered portable storage battery has been accepted. The ID issued to the portable storage battery is, for example, a combination of a "property number," a "room number," and a "sequential number," as shown in table 20d1. Here, the "property number" is a property identification number that identifies the apartment complex 1a, which is a complex facility, and is set in advance in the management device 2. The "room number" is a number that identifies the room selected at the time of the occupancy contract (private area identification) and is set from the user's access information, and the "sequential number" is a number assigned in order of registration. In table 20d1, an example is shown as "010-0201-001," in which the property number "010," the room number "0201," and the serial number "001" are connected in sequence with a symbol such as a hyphen. Note that rules for assigning such IDs can be determined in advance. It is sufficient that IDs are assigned in accordance with rules that at least enable linking with residents of apartment complex 1a, which has private area 120 and common area 130 that can use the portable storage battery for buying and selling electricity.

[0052] The management device 2 notifies the PC / smartphone 30 of the issued ID. An exemplary storage battery ID notification screen is displayed on screen 30b on the display screen of the user's PC / smartphone 30. As illustrated on screen 30b, the storage battery ID issued by the processing of step S113 is displayed together with identification information identifying the portable storage battery related to the registration confirmed by the user's operation input. On screen 30b, as indicated by a dashed-dotted oval, the issued storage battery ID is displayed at the top of the identification information of the registered portable storage battery. The storage battery ID notified to the PC / smartphone 30 is sent, for example, to the registered email address registered at the time of the tenancy agreement. The storage battery ID (table 20d1) issued to the user is associated with user attribute information, including predetermined identification information (such as name, model, capacity, etc.) identifying the portable storage battery, the user ID issued to the user at the time of the tenancy agreement, authentication information such as a password, and the registered email address, and is stored as registration information in the database 20. After the processing of step S113 is completed, this routine is temporarily terminated.

[0053] As described above, in the power supply system 1 according to this embodiment, the management device 2 can issue a dedicated ID (storage battery ID) to each portable storage battery owned by a resident and store the dedicated ID as registration information in the database 20. The issued dedicated ID can be, for example, a combination of a property number identifying the property in the apartment complex 1a and a room number identifying the private area 120 or the like. This allows the storage battery ID to include the user's residence address (property number, room number), making it possible to easily identify the user from the storage battery ID even when the common area 130 is used, for example. Similarly, even when a portable storage battery is used through another property (power purchase and sale), the management device for the other property can easily identify the property in which the user resides based on the storage battery ID, which is expected to simplify the billing process for usage, for example.

[0054] (3) User authentication section Next, a usage authentication process for use of a portable storage battery in which a storage battery ID has been registered will be described. FIG. 6 is a flowchart showing an example of the usage authentication process for use of a portable storage battery in which a storage battery ID of the management device 2 has been registered. The flow shown in FIG. 6 enables use of a portable storage battery in which a storage battery ID has been registered in advance via the private area 120, the common area 130, etc. of the apartment building 1a. Use of the portable storage battery is performed, for example, through usage authentication for the user's PC / smartphone 30 connected to the management device 2 via the communication network N. Note that screen 30d illustrated in FIG. 6 is an example screen displayed on the display screen of the PC / smartphone 30 of the user of the portable storage battery before authentication, and screen 30e is an example screen after use of the portable storage battery has been authenticated using the storage battery ID.

[0055] After the process starts, the user moves the portable storage battery to a predetermined location (step S121). Here, the predetermined location is, for example, an area where the portable storage battery can be temporarily installed in the private area 120 connected to the smart meter 11f via the V2H 121 of the apartment building 1a or in the common area 130 connected to the smart meter 11g via the V2H 131. After moving the portable storage battery, the user accesses the management device 2 via the PC / smartphone 30 and performs an authentication procedure to use the V2H 121 or V2H 131 (step S122). In step S122, authentication regarding the use of the portable storage battery whose storage battery ID has been registered is performed via a display screen such as the screen 30c (step S123).

[0056] In step S122, a storage battery connection registration screen is displayed on the display screen of the PC / smartphone 30 that accessed the management device 2, prompting the user to enter predetermined identification information, such as the storage battery ID, name, model, and capacity of the portable storage battery, as illustrated in screen 30c. The user operates the PC / smartphone 30 according to the displayed screen 30c and enters the identification information, such as the storage battery ID, name, model, and capacity of the previously registered portable storage battery, as shown in the dashed-dotted oval frame. After entering the predetermined identification information that identifies the previously registered portable storage battery, the user presses the execute button on screen 30c and transmits the confirmed input information to the management device 2. If the entered identification information is not confirmed, the user can re-enter the identification information by pressing the cancel button.

[0057] In step S123, an authentication determination is made for the portable storage battery received from the PC / smartphone 30 via the screen 30c. The management device 2 searches for registration information registered in the database 20, for example, using the received storage battery ID as a search key. The management device 2 then extracts the searched storage battery ID from the database 20 and the associated information (name, model, capacity, etc.) associated with the ID, and compares it with the identification information, such as the name, model, and capacity, of the portable storage battery received via the screen 30c. In step S123, if the comparison results in a match with the registration information previously registered in the database 20 (step S123, "OK"), the process proceeds to step S124; if not (step S123, "NG"), the process proceeds to step S128.

[0058] In step S123, if the result of the comparison matches the registration information previously registered in database 20, the storage battery connection authentication result shown in screen 30d is notified to PC / smartphone 30. As shown in screen 30d, a predetermined message indicating the authentication result, such as "The registered storage battery has been authenticated. Please connect it at the specified location," and the date and time information of the authentication, as well as the identification information regarding the portable storage battery entered by the user (storage battery ID, name, model, capacity) are displayed on the display screen of PC / smartphone 30. The display information of screen 30d notified to PC / smartphone 30 (message, date and time information, identification information regarding the portable storage battery) is sent to the user's registered email address, for example.

[0059] In step S124, the portable storage battery is connected to an outlet provided in a predetermined location, and either the private section 120 or the common section 130 is used depending on the purpose of use (charging the portable storage battery or selling electricity from the portable storage battery) (step S125). In step S126, it is determined whether use of the portable storage battery has been terminated. In step S126, if use of the portable storage battery is to be terminated (step S126, "YES"), the process proceeds to step S127; otherwise (step S126, "NO"), the process returns to step S125. In step S127, the outlet connected to the portable storage battery is unplugged, and the portable storage battery is moved from the predetermined location (step S128). In step S126, when use of the portable storage battery is terminated, usage history information for calculating the usage fee is stored in database 20. The usage record information, for example, the date and time of use, the duration of use, the purpose of use (selling or buying electricity), and the amount of electricity (kWh) are associated with the battery ID and stored in a database. 20. After step S128 is completed, this routine ends for the time being.

[0060] (4) Portable Battery Fee Calculation Unit Next, a fee calculation process based on the usage history of the portable storage battery will be described. FIG. 7 is a flowchart showing an example of a fee calculation process that reflects the usage history of the portable storage battery in the management device 2. The flow shown in FIG. 7 enables the monthly billing determination unit to calculate a fee that reflects the usage history of the portable storage battery, whose storage battery ID has been registered in advance. In FIG. 7, table 20e1 is an example of an electricity fee for the amount of electricity used by a resident calculated by the electricity fee calculation unit 2a, etc. In the following, it is assumed that the resident is a contractor of the apartment building 1a that uses the private section 120, and that the electricity fee is calculated by the electricity fee calculation unit 2a, etc., based on the amount of electricity used per unit month linked to the customer ID (user ID). That is, table 20e1 stores the electricity fee for the private section load 12a measured via the smart meter 11a. 4 and other figures, the charges are calculated assuming that the electricity rate for purchasing electricity from the grid in the complex is 25 yen / kWh and the electricity rate (normal rate) for the common area 130 or the exclusive area 120 is 30 yen / kWh. In addition, the rate plan for the portable storage battery is calculated as follows: purchasing electricity: 27 yen / kWh, selling electricity: 15 yen / kWh.

[0061] Also, in Figure 7, table 20f1 is an example of information regarding usage history stored in database 20, and is configured to include attribute information such as date and time information of usage linked to the storage battery ID, usage time, type of purpose of usage (selling electricity, buying electricity), amount of electricity (kWh), and attribute indicating the fee type (normal in the example shown).

[0062] In the flow shown in FIG. 7, after the process starts, a fee for determining the usage history (buying and selling) of the portable storage battery is calculated (step S131). As illustrated in table 20e1, the electricity fee for the exclusive use area load 12a measured via the smart meter 11a is determined. Furthermore, as illustrated in table 20f1, the usage history for the portable storage battery per month related to the billing is extracted from the database 20. The management device 2 searches the database 20 using, for example, the registered storage battery ID as a search key, and extracts the usage history for the period related to the billing. In step S132, based on the usage history extracted from the database 20, it is determined whether or not there is a history for the storage battery ID. That is, in step S132, if the usage history for the portable storage battery per month related to the billing is not extracted from the database 20 (step S132, “NO”), the settlement amount is set to “0” and the process proceeds to step S137; otherwise (step S132, “YES”), the process proceeds to step S133.

[0063] In step S133, it is determined whether or not the portable storage battery is being used for the purpose of selling power. Here, the use of the portable storage battery for the purpose of selling power refers to the supply of power from the grid 3 to the user (charging the portable storage battery). In step S133, if there is no record of the portable storage battery being used for the purpose of selling power in the usage records (table 20f1) extracted from the database 20 (step S133, "NO"), the process proceeds to step S135; otherwise (step S133, "YES"), the process proceeds to step S134. In step S134, the fee for the amount of power used for the purpose of selling power is added as the payment amount to the electricity charge for the exclusive use unit load 12a determined in step S131. The management device 2, for example, calculates the total amount of power (kWh) for the purpose of selling power in the usage records (table 20f1) extracted from the database 20. Then, the management device 2 calculates the payment amount corresponding to the total amount of electricity (kWh) for the purpose of selling the electricity, based on the billing fee registered in advance as a rate plan. The calculated payment amount is added to the electricity fee stored in table 20e1, for example, and when a rate table reflecting the electricity sale usage fee (payment amount) of the portable storage battery is generated as shown in table 20g1, the process proceeds to step S135.

[0064] In step S135, it is determined whether or not the portable storage battery is being used for the purpose of purchasing electricity. Here, use of the portable storage battery for the purpose of purchasing electricity refers to the supply of electricity from the portable storage battery to grid 3 (power supply from the portable storage battery). In step S135, if there is no record of use of the portable storage battery for the purpose of purchasing electricity in the usage records (table 20f1) extracted from database 20 (step S135, "NO"), the process proceeds to step S137; otherwise (step S135, "YES"), the process proceeds to step S136.

[0065] In step S136, a supply amount corresponding to the amount of power purchased is deducted from the billing fee in the fee table (table 20g1) generated in step S134. The management device 2, for example, calculates the total amount of power (kWh) for the purpose of purchasing power from the usage record (table 20f1) extracted from the database 20. The management device 2 then calculates a supply amount corresponding to the total amount of power (kWh) for the purpose of purchasing power, based on the billing fee registered in advance as a rate plan. The calculated supply amount is deducted from the billing fee stored in table 20g1, for example, and when a fee table reflecting the power purchase usage amount (supply amount) of the portable storage battery is generated as shown in table 20g2, the process proceeds to step S137.

[0066] In step S137, the amount billed to the resident for the electricity usage fee is calculated. The management device 2 calculates the amount billed to the resident by adding the settlement amount calculated from the usage record for the purpose of buying and selling electricity from the portable storage battery to the electricity fee (electricity usage fee) shown in table 20e1. The management device 2 reflects the amount of electricity sold and bought in the generated tables 20g1 and 20g2 in table 20e1, and generates the billing amount table shown in table 20e2. For the residents of the apartment building 1a who use the exclusive use unit 120, the monthly billing amount including the use of the portable storage battery is determined based on the billing amount table (table 20e2) generated by the management device 2. After processing step S137, this routine is temporarily terminated.

[0067] (5) Other property usage fee calculation section Next, a fee calculation process based on the usage history of the portable storage battery via another property will be described. FIG. 8 is a flowchart showing an example of a fee calculation process including the usage history of the portable storage battery via another property. The flow shown in FIG. 8 enables fee calculation that reflects the usage history of the portable storage battery in another property. Note that use of the portable storage battery via another property refers to use of the portable storage battery in another bulk power receiving system 50. In another bulk power receiving system 50, as described in the information related to usage settings (table 20a) in FIG. 4, "Yes" is set in the "Other property connection" column. In another bulk power receiving system 50 in which "Yes" is set in the "Other property connection" column, the registration ID (battery ID) assigned to the portable storage battery is shared with the management device 2, and, for example, it is possible to use the portable storage battery via the common area 130 of the other bulk power receiving system 50.

[0068] In FIG. 8, table 20e3 is similar to table 20e1 and is an example of an electricity charge for the amount of electricity used by a resident calculated by the electricity charge calculation unit 2a or the like. The resident is a contract holder of the apartment building 1a who uses the private unit 120, and the electricity charge is calculated by the electricity charge calculation unit 2a or the like based on the amount of electricity used per unit month linked to the customer ID (user ID). Table 20e3 stores the electricity charge for the private unit load 12a measured via the smart meter 11a. Note that in FIG. 8 as well, when calculating the charges, for example, the charge for electricity purchased from the grid in the complex for both the ID-registered property and other properties is calculated as 25 yen / kWh, and the electricity charge (normal charge) for the common unit 130 or the private unit 120 is calculated as 30 yen / kWh. In addition, the charge plan for the portable storage battery is calculated as 27 yen / kWh for purchasing electricity and 15 yen / kWh for selling electricity for both the ID-registered property and other properties. It shall be calculated.

[0069] Table 20f2 is an example of information related to usage records stored in database 20, and is configured to include attribute information such as date and time information of usage linked to a storage battery ID, usage time, type of purpose of use (selling or buying electricity), amount of electricity (kWh), and attribute indicating the rate type (normal in the illustrated example). Table 20f3 is the usage record of portable storage batteries extracted from the usage records of other properties (other bulk electricity receiving systems 50 with "Yes" set in the "Connection to other properties" column). In table 20f3, the usage record of portable storage batteries linked to property IDs is extracted for each property ID.

[0070] In the flow shown in FIG. 8, after the process starts, a fee for determining the usage record (buying and selling) of the portable storage battery is calculated (step S141). As illustrated in table 20e3, the electricity charge for the exclusive use area load 12a measured via the smart meter 11a is determined. Furthermore, as illustrated in table 20f2, the usage record for the portable storage battery per month pertaining to the billing is extracted from the database 20. For example, the management device 2 searches the database 20 using the registered storage battery ID as a search key to extract the usage record for the period pertaining to the billing. Furthermore, as illustrated in table 20f3, the usage record for the portable storage battery in another property per month pertaining to the billing is extracted via the communication network N. For example, the management device 2 notifies the management device of the other property (another bulk power receiving system 50) of the registered storage battery ID and requests the usage record for the month per month pertaining to the billing. The management device of the other property (other bulk power receiving system 50) accepts the request from the management device 2, extracts the usage history for the storage battery ID from the database it manages, and transmits it together with the property ID of its own property to the management device 2. The management device 2 accepts the usage history for the storage battery ID transmitted from the other property via the communication network N, and stores it in table 20f3 in association with the property ID.

[0071] In step S142, it is determined whether or not there is a usage record of the portable storage battery corresponding to the storage battery ID, based on the usage record and usage records at other properties extracted from database 20. That is, in step S142, if there is no usage record for the portable storage battery on a monthly basis related to the billing (step S142, "NO"), the settlement amount is set to "0" and the process proceeds to step S147; otherwise (step S142, "YES"), the process proceeds to step S143.

[0072] In step S143, similarly to step S133, it is determined whether or not the portable storage battery is being used for the purpose of selling power. In step S143, if there is no record of use of the portable storage battery for the purpose of selling power in the usage records (table 20f2) and the usage records in other properties (table 20f3) extracted from the database 20 ("NO"), the process proceeds to step S145; otherwise ("YES"), the process proceeds to step S144. In step S144, the fee for the amount of power used for the purpose of selling power is added as the payment amount to the electricity charge for the exclusive use area load 12a determined in step S141. For example, the management device 2 calculates the total amount of power (kWh) for the purpose of selling power in the usage records (table 20f2) extracted from the database 20. In addition, the management device 2 calculates the total amount of power (kWh) for the purpose of selling power in the usage records in other properties (table 20f3). The management device 2 then adds together the total amount of power (kWh) for the purpose of selling power in the usage history (table 20f2) extracted from the database 20 and the total amount of power (kWh) for the purpose of selling power in the usage history of other properties (table 20f3), to calculate the total combined amount of power (kWh) to be billed. The management device 2 calculates the payment amount corresponding to the combined total amount of power (kWh) for the purpose of selling power, based on the billing fee registered in advance as a rate plan. The calculated payment amount is added to the electricity fee stored in table 20e3, for example, and a rate table is generated that reflects the usage fees (payment amounts) for selling power of the portable storage battery, including the usage history of other properties, as shown in table 20g3, Proceed to step S145.

[0073] In step S145, whether or not the portable storage battery is being used for the purpose of purchasing electricity is determined in the same manner as in step S135. In step S145, if there is no record of the portable storage battery being used for the purpose of purchasing electricity among the usage records (table 20f2) and usage records at other properties (table 20f3) extracted from database 20 (step S145, "NO"), the process proceeds to step S147; otherwise (step S145, "YES"), the process proceeds to step S146.

[0074] In step S146, the supply amount corresponding to the amount of power purchased is deducted from the billing fee in the rate table (table 20g3) generated in step S144. The management device 2, for example, calculates the total amount of power (kWh) for the purpose of purchasing power from the usage records (table 20f1) extracted from the database 20. The management device 2 also calculates the total amount of power (kWh) for the purpose of purchasing power from the usage records (table 20f3) of other properties. The management device 2 adds the total amount of power (kWh) for the purpose of purchasing power from the usage records (table 20f2) extracted from the database 20 to the total amount of power (kWh) for the purpose of purchasing power from the usage records (table 20f3) of other properties to calculate the combined total amount of power (kWh) for the billing. The management device 2 then calculates the supply amount corresponding to the total amount of power (kWh) for the purpose of purchasing power, based on the billing fee registered in advance as a rate plan. The calculated supply amount is deducted, for example, from the billing fee stored in table 20g3, and when a fee table reflecting the electricity purchase usage amount (supply amount) of the portable storage battery is generated as shown in table 20g4, processing proceeds to step S147.

[0075] In step S147, the amount billed to the resident for the electricity usage fee is calculated. The management device 2 adds the settled amount, including the actual usage record at other properties for the purpose of buying and selling electricity from the portable storage battery, to the electricity fee (electricity usage fee) shown in table 20e3 to calculate the amount billed to the resident. The management device 2 reflects the amount of electricity sold and purchased in the generated tables 20g3 and 20g4 in table 20e3 to generate the billing amount table shown in table 20e4. For the residents of the apartment building 1a who use the exclusive use unit 120, the monthly billing amount, including the actual usage record at other properties for the portable storage battery, is determined based on the billing amount table (table 20e4) generated by the management device 2. After processing step S147, this routine is temporarily terminated.

[0076] (6) Disaster use setting processing unit Next, the usage setting process in the event of a disaster will be described. FIG. 9 is a flowchart showing an example of the usage setting process of the management device 2 in the event of a disaster. The flow shown in FIG. 9 updates the status of the item indicating disaster response in progress for a property registered as disaster response capable at the time of usage setting registration. By updating the status of the item indicating disaster response in progress for a property registered as disaster response capable, the status of the property can be notified to other properties (other bulk power receiving systems 50) connected via the communication network N. A user of a portable storage battery with a registered storage battery ID can use the storage battery appropriately by, for example, checking the status of the item indicating disaster response in progress for the property capable of disaster response via their own user terminal (PC / smartphone 30). In FIG. 9, tables 20a#1 to 20a#3 show the transition of information stored in the tables for a property registered as disaster response capable at the time of usage setting registration. Table 20a#1 shows the initial state of information regarding the usage settings for a property registered as disaster response capable at the time of usage setting registration.

[0077] 9, after the process starts, when disaster response is started in step S151, the status of the item indicating that disaster response is in progress for the property that can respond to a disaster is updated. The status value stored in the "Disaster Response In Progress" item in table 20a#1 is updated. As shown in table 20a#1 and table 20a#2, the default value (OFF) stored in the "Disaster Response In Progress" item in table 20a#1 is updated to the "ON" status. After the status value is updated, the portable storage battery becomes available for use under the disaster rate plan (step S152). A user of another property (another bulk power receiving system 50) connected via communication network N can ascertain the "ON" status of the item indicating disaster response in progress, for example, via a PC / smartphone 30. The user then moves the portable storage battery to the common area 130 or the like of the property where the "Disaster Response In Progress" item has been updated to the "ON" status, and can use the portable storage battery for the purpose (charging, selling electricity) according to the conditions set in the disaster rate plan.

[0078] In step S151, the status of the usage setting item related to the end of disaster response is updated. The management device 2 updates the status value of the item indicating that disaster response is in progress for a property capable of disaster response from "ON" status to "OFF" status. As shown in tables 20a#2 and 20a#3, the "ON" status stored in the disaster response in progress item in table 20a#2 is updated to "OFF" status. After step S153 is completed, this routine is temporarily terminated.

[0079] (6) Disaster Charge Calculation Department Next, a fee calculation process based on the usage history of the portable storage battery when another property is used during a disaster will be described. FIG. 10 is a flowchart showing an example of a fee calculation process including the usage history of the portable storage battery when another property is used during a disaster. The flow shown in FIG. 10 enables fee calculation that reflects the usage history of the portable storage battery when another property is used during a disaster. Note that in the information (table 20a) regarding the usage settings of the other property (other bulk power receiving system 50), "Yes" is set in the "Other Property Connection" column and "Yes" is set in the disaster response column. In the other bulk power receiving system 50 for which "Yes" is set in the "Other Property Connection" column, the registration ID (storage battery ID) assigned to the portable storage battery is shared with the management device 2, and, for example, the portable storage battery can be used via the common area 130 of the other bulk power receiving system 50. In the other bulk power receiving system 50 for which "Yes" is set in the disaster response column, the disaster rate plan set in the other property is applied to the use of the portable storage battery during a disaster.

[0080] In FIG. 10, table 20e5 is similar to table 20e1 and shows an example of an electricity rate for the resident's energy usage calculated by the electricity rate calculation unit 2a or the like. The resident is a contract holder of the apartment complex 1a who uses the private unit 120, and the electricity rate is calculated by the electricity rate calculation unit 2a or the like based on the energy usage per unit month linked to the customer ID (user ID). Table 20e5 stores the electricity rate for the private unit load 12a measured via the smart meter 11a. Note that in FIG. 10, the rates are calculated, for example, as follows: the rate for electricity purchased from the grid in the complex for both the ID-registered property and other properties is 25 yen / kWh, and the rate (normal rate) for electricity in the common unit 130 or the private unit 120 is 30 yen / kWh. The rate plan for the portable storage battery is calculated as follows for both the ID-registered property and other properties: 27 yen / kWh for purchasing electricity and 15 yen / kWh for selling electricity.

[0081] Table 20f4 is an example of information relating to usage records stored in database 20, and is configured to include attribute information such as date and time information of usage linked to the storage battery ID, usage time, type of purpose of use (selling or buying electricity), amount of power (kWh), and attribute indicating the rate type (normal in the illustrated example). Table 20f5 is the usage record of portable storage batteries extracted from the usage record of other properties (other bulk power receiving systems 50 with "Yes" set in the "Other property connection" column and "Yes" set in the disaster response column). In table 20f5, the usage record of portable storage batteries linked to the property ID is extracted for each property ID. Note that for other properties, pre-set In the disaster rate plan, the purchase price of electricity during a disaster is set at 24 yen / kWh for both ID-registered properties and other properties, and the sale price is set at 18 yen / kWh.

[0082] In the flow shown in FIG. 10, after the process starts, a fee for determining the usage history (buying and selling) of the portable storage battery is calculated (step S161). As illustrated in table 20e5, the electricity fee for the exclusive use area load 12a measured via the smart meter 11a is determined. Furthermore, as illustrated in table 20f4, the usage history for the portable storage battery per month pertaining to the billing is extracted from the database 20. For example, the management device 2 searches the database 20 using the registered storage battery ID as a search key to extract the usage history for the period pertaining to the billing. Furthermore, as illustrated in table 20f5, the usage history for the portable storage battery per month pertaining to the billing, including disaster response in another property, is extracted via the communication network N. For example, the management device 2 notifies the management device of the other property (another bulk power receiving system 50) of the registered storage battery ID and requests the usage history per month pertaining to the billing. The management device of the other property (other bulk power receiving system 50) accepts the request from the management device 2, extracts the usage history for the storage battery ID from the database it manages, and transmits it to the management device 2 together with the property ID of its own property. The management device 2 accepts the usage history for the storage battery ID transmitted from the other property via the communication network N, and stores it in table 20f5 in association with the property ID. As illustrated in table 20f5, for use during disaster response, "during disaster" is stored in the attribute column, and it is identified that a disaster rate plan will be applied.

[0083] In step S162, it is determined whether or not there is a usage history of the portable storage battery corresponding to the storage battery ID, based on the usage history extracted from database 20 and the usage history including disaster response at other properties. That is, in step S162, if there is no usage history for the portable storage battery on a monthly basis related to the billing (step S162, "NO"), the settlement amount is set to "0" and the process proceeds to step S167; otherwise (step S162, "YES"), the process proceeds to step S163.

[0084] In step S163, whether or not the portable storage battery is being used for the purpose of selling electricity is determined in the same manner as in step S133. In step S163, if there is no record of the portable storage battery being used for selling electricity among the usage records (table 20f4) extracted from database 20 and the usage records (table 20f5) including disaster response at other properties (step S163, "NO"), the process proceeds to step S165; otherwise (step S163, "YES"), the process proceeds to step S164.

[0085] In step S164, the fee for the amount of power used for the purpose of selling the power is added as the payment amount to the electricity fee for the exclusive use unit load 12a determined in step S161. The management device 2, for example, calculates the total amount of power (kWh) for the purpose of selling the power in the usage history (table 20f4) extracted from the database 20. The management device 2 also calculates the total amount of power (kWh) for the purpose of selling the power in the usage history (table 20f5) including disaster response in other properties. Note that the rate plan for the amount of power (kWh) for the purpose of selling the power in disaster response is different from the normal rate, so an individual amount of power (kWh) is calculated. The management device 2 then adds together the total amount of power (kWh) intended for power sale in the usage history (table 20f4) extracted from the database 20 and the total amount of power (kWh) intended for power sale in the usage history of other properties (table 20f5), to calculate the total combined amount of power (kWh) to be billed. The management device 2 calculates the normal payment amount corresponding to the combined total amount of power (kWh) intended for power sale, based on the charging fee registered in advance as a rate plan. The management device 2 also applies the charging fee set in advance as a disaster rate plan to the individual amount of power (kWh) for disaster response, to calculate the disaster payment amount intended for power sale in the event of a disaster. The management device 2 then adds together the normal payment amount calculated from the combined total amount of power (kWh) and the disaster payment amount to calculate the payment amount intended for power sale. The calculated payment amount is, for example, For example, a fee table is generated that reflects the electricity sales usage fee (payment amount) of the portable storage battery, including disaster response at other properties, as shown in table 20g5, and is added to the electricity fee stored in table 20e5, and then the process proceeds to step S165.

[0086] In step S165, whether or not the portable storage battery has been used for the purpose of purchasing electricity is determined, similarly to step S135. In step S165, if there is no record of the portable storage battery being used for purchasing electricity among the usage records (table 20f4) extracted from database 20 and the usage records (table 20f5) including disaster response at other properties (step S165, "NO"), the process proceeds to step S167; otherwise (step S165, "YES"), the process proceeds to step S166.

[0087] In step S166, the supply amount corresponding to the amount of power purchased is deducted from the billing fee in the fee table (table 20g5) generated in step S164. The management device 2, for example, calculates the total amount of power (kWh) for the purpose of purchasing power from the usage history (table 20f4) extracted from the database 20. The management device 2 also calculates the total amount of power (kWh) for the purpose of purchasing power from the usage history (table 20f5) including disaster response at other properties. Note that the rate plan for the amount of power (kWh) for the purpose of purchasing power in disaster response differs from the normal rate, so an individual amount of power (kWh) is calculated. The management device 2 then adds together the total amount of electricity (kWh) intended for purchasing electricity from the usage history (table 20f4) extracted from the database 20 and the total amount of electricity (kWh) intended for purchasing electricity from the usage history of other properties (table 20f5), to calculate the total amount of electricity (kWh) to be billed. The management device 2 calculates the normal supply amount corresponding to the total amount of electricity (kWh) intended for purchasing electricity, based on the charging fees registered in advance as a rate plan. The management device 2 also applies the charging fees set in advance as a disaster rate plan to the individual amounts of electricity (kWh) used in disaster response, to calculate the disaster supply amount intended for purchasing electricity in the event of a disaster. The management device 2 then adds together the normal supply amount calculated from the total amount of electricity (kWh) and the disaster supply amount to calculate the supply amount intended for purchasing electricity. The calculated supply amount is deducted, for example, from the billing amount stored in table 20g5, and a fee table is generated that reflects the purchase and use amount (supply amount) of the portable storage battery, including disaster response at other properties, as shown in table 20g6, and then the process proceeds to step S167.

[0088] In step S167, the amount billed to the resident for electricity usage is calculated. The management device 2 calculates the amount billed to the resident by adding the electricity charge (electricity usage charge) shown in table 20e5 to the settlement amount calculated based on the actual usage record of the portable storage battery at other properties, including disaster response, for the purpose of buying and selling electricity from the portable storage battery. The management device 2 generates the billing amount table shown in table 20e6 by reflecting the electricity sales and purchase amounts in the generated tables 20g5 and 20g6 in table 20e5. For the residents of the apartment building 1a who use the exclusive use unit 120, a monthly billing amount is determined based on the billing amount table (table 20e6) generated by the management device 2, reflecting the actual usage record of the portable storage battery at other properties, including disaster response. After processing step S167, this routine is temporarily terminated.

[0089] As described above, the power supply system 1 according to this embodiment includes, in the exclusive section 120, a V2H 121 connected to an EV / PHV 122 constituting a portable storage battery, and a smart meter 11f capable of measuring power in both directions of buying and selling via the portable storage battery. The power supply system 1 also includes, in the common section 130, a V2H 131 connected to an EV / PHV 132 constituting a portable storage battery, and a smart meter 11g capable of measuring power in both directions of buying and selling via the portable storage battery. The management device 2 of the power supply system 1 can acquire the sold power and purchased power of the portable storage battery (EV / PHV 122) measured via smart meter 11f, and the sold power and purchased power of the portable storage battery (EV / PHV 132) measured via smart meter 11g.

[0090] The management device 2 includes a database 20 that stores, as portable storage battery management information, information on usage settings, information on rate plans, information on disaster rate plans, registration information, and information on usage history. The management device 2 issues dedicated IDs (storage battery IDs) to portable storage batteries (EV / PHV 122, EV / PHV 132, etc.) via user terminals (PCs / smartphones 30) of users (users of the private unit 120 and the common unit 130) connected via a communication network N, and can register the IDs in the database 20. Then, based on the information on usage settings, information on rate plans, information on disaster rate plans, information on usage history, etc. stored in the database 20, the management device 2 can provide users with an electricity buying and selling service for the ID-registered portable storage batteries connected via the private unit 120 and the common unit 130.

[0091] Furthermore, in the power supply system 1 according to this embodiment, the management device 2 is connected via a communication network N to a management device provided in another bulk power receiving system 50 outside the apartment building 1a. The management device 2 accepts requests from the management devices provided in the other bulk power receiving systems 50 connected via the communication network N, and provides users with a power buying and selling service for ID-registered portable storage batteries based on information on usage settings, rate plans, disaster rate plans, usage history, and the like stored in the database 20. This makes it possible to provide a power supply system 1 that can provide the benefits of private power generation using distributed power sources including portable storage batteries to both the owner of a complex facility and multiple power supply destinations in the complex facility.

[0092] (others) The above-described embodiment is merely an example, and the disclosure of the present embodiment may be appropriately modified and implemented without departing from the spirit thereof. The processes and means described in the present disclosure may be freely combined and implemented as long as no technical contradiction occurs.

[0093] Furthermore, a process described as being performed by one device may be shared and executed by multiple devices. Alternatively, a process described as being performed by different devices may be executed by a single device. In a computer system, the hardware configuration that realizes each function can be flexibly changed.

[0094] <<Computer-readable recording medium>> A program that causes an information processing device or other machine or device (hereinafter referred to as a computer, etc.) to realize any of the above functions can be recorded on a computer-readable recording medium. Then, by having the computer, etc. read and execute the program from this recording medium, the function can be provided.

[0095] Here, a computer-readable recording medium refers to a recording medium that stores information such as data and programs electrically, magnetically, optically, mechanically, or chemically and that can be read by a computer, etc. Among such recording media, those that can be removed from a computer, etc. include, for example, flexible disks, magneto-optical disks, CD-ROMs, CD-R / Ws, DVDs, Blu-ray discs, DATs, 8mm tapes, memory cards such as flash memory, etc. Furthermore, recording media that are fixed to a computer, etc. include hard disks and ROMs, etc.

[0096] In the following, the constituent elements of the present invention will be described with reference to the reference numerals in the drawings in order to make it possible to compare the constituent elements of the present invention with the configurations of the embodiments. <Invention 1> It is connected to the power grid (3) and supplies power to a complex facility (1a) that includes multiple power supply destinations. A power supply system (1), comprising: a power converter (121, 131) provided in at least one of the plurality of power supply destinations (120, 130), for converting supply power supplied from the power system (3) into charging power for a portable storage battery (122, 132) and for converting surplus power of the portable storage battery (122, 132) and outputting the surplus power to the power system (3); power meters (11f, 11g) that measure the power supplied from the power grid (3) to the power converters (121, 131) when portable storage batteries (122, 132) are connected to the power converters (121, 131) or measure the converted surplus power output from the power converters (121, 131) to the power grid (3); a management device (2) that calculates a billing fee and a rebate fee for use of the portable storage batteries (122, 132) in accordance with a predetermined rate plan based on the power values ​​measured by the power meters (11f, 11g); A power supply system (1) comprising: [Explanation of symbols]

[0097] 1. Power supply system 1a Apartment complex 2 Management device 3 systems 4 Parent smart meter (two-way) 5 Battery Controller 6 LTE routers 7. Hub 8a, 8b, 8c Gateways 9 First distribution board 10 Second distribution board 11a, 11b, 11c, 11d, 11e, 11f, 11g, 11h smart meters 12a, 12b, 12c, 120 Private area 13, 130 Common area 14 Storage battery 15 Solar cells 16 Battery Power Conditioner 17 Solar cell power conditioner 20 databases 30 User devices (PC / smartphone) 50 Other bulk power receiving systems 121, 131 V2H (power converter) 122, 132 EV / PHV (portable battery)

Claims

1. An electric power supply system that is connected to an electric power grid and supplies electric power to a complex facility including a plurality of power supply destinations, a power converter that is provided at at least one of the plurality of power supply destinations, and that converts supply power supplied from the power grid into charging power for a portable storage battery, and converts surplus power of the portable storage battery and outputs the surplus power to the power grid; a power meter that measures the power supplied from the power grid to the power converter when a portable storage battery is connected to the power converter, or measures the surplus power after conversion that is output from the power converter to the power grid; a management device that calculates a billing fee and a rebate fee for use of the portable storage battery in accordance with a predetermined rate plan based on the power value measured by the power meter; Equipped with the management device issues a storage battery ID for identifying a portable storage battery related to the use of the power converter to the portable storage battery related to the use of the power converter, and registers the storage battery ID issued to the portable storage battery; a storage battery ID issued to the portable storage battery is shared with a management device of another complex facility that is equipped with the power converter, and a request is received from the management device of the other complex facility, enabling use of the power converter equipped in the other complex facility based on the shared storage battery ID; the complex facility and the other complex facility are connected via a network, and a power value measured by the power meter in the other complex facility is transmitted to the complex facility together with the storage battery ID; A power supply system characterized by calculating billing fees and rebate fees for the use of the portable storage battery based on the power values ​​measured by the power meters at the complex facility and the other complex facility.

2. 2. The power supply system according to claim 1, wherein when a portable storage battery is connected to the power converter, the management device performs authentication based on a storage battery ID issued to the portable storage battery and registers the storage battery ID of the authenticated portable storage battery.

3. The power supply system of claim 1, wherein the management device has a special rate plan for use in the event of a disaster, and calculates billing fees and rebate fees for use of a portable storage battery in the event of a disaster based on the special rate plan and the power value measured by the power meter.

4. A power management method executed by a management device of a power supply system that is connected to a power grid and supplies power to a complex facility including a plurality of power supply destinations, comprising: The power supply system includes: a power converter that is provided at at least one of the plurality of power supply destinations, and that converts supply power supplied from the power grid into charging power for a portable storage battery, and converts surplus power of the portable storage battery and outputs the surplus power to the power grid; a power meter that measures the supply power supplied from the power grid to the power converter when a portable storage battery is connected to the power converter, or measures the surplus power after conversion output from the power converter to the power grid, causing the management device to calculate a billing fee and a rebate fee for use of the portable storage battery in accordance with a predetermined rate plan based on the power value measured by the power meter; the management device issues a storage battery ID for identifying a portable storage battery related to the use of the power converter to the portable storage battery related to the use of the power converter, and registers the storage battery ID issued to the portable storage battery; a storage battery ID issued to the portable storage battery is shared with a management device of another complex facility that is equipped with the power converter, and a request is received from the management device of the other complex facility, enabling use of the power converter equipped in the other complex facility based on the shared storage battery ID; the complex facility and the other complex facility are connected via a network, and a power value measured by the power meter in the other complex facility is transmitted to the complex facility together with the storage battery ID; calculating a billing fee and a rebate fee for use of the portable storage battery based on the power values ​​measured by the power meters in the complex facility and the other complex facility; A power management method comprising:

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