Power network system

Abstract

To make it possible to utilize power as long as possible after power outage.SOLUTION: A power network system constructed in a local region comprises: a plurality of electrical facilities that are provided in a plurality of buildings in the region, respectively, and can mutually exchange power through privately owned lines throughout the region; and a shared power storage facility that is provided in an institution constructed in the region, receives power supply from a commercial system power supply via transmission lines, and can transfer and receive power to / from the electrical facilities through the privately owned lines. The shared power storage facility includes: a shared capacitor capable of storing power; and a shared distributor that receives excess power obtained by the mutual exchange of the electrical facilities via the privately owned lines and outputs the excess power to the shared capacitor.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a power network system Mu .

Background Art

[0002] Patent Document 1 discloses a technology related to power sharing among a plurality of houses built in a housing block. The power used in this housing block is purchased in a lump sum from an electric power company and supplied to each house. In addition, a solar power generation unit, a fuel cell, and a storage battery are installed in each house. When the power generated by the solar power generation unit and the fuel cell is surplus, the surplus power is stored in the storage battery, shared with other houses, or sold to the electric power company.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when all the power stored in the storage battery of each house is consumed during a power outage, electric devices cannot be used in each house thereafter.

[0005] The present invention has been made in view of the above circumstances, and is to enable power to be used for as long as possible after a power outage.

Means for Solving the Problems

[0006] The invention described in claim 1 is a power network system 1 constructed in a local area, comprising: a plurality of electrical facilities 20 each provided in a plurality of buildings constructed in the area and capable of mutually exchanging power through private lines 10 spread throughout the area; and a shared energy storage facility 50 provided in a facility 3 constructed in the area, which receives power from the commercial grid power supply through transmission lines 8 and is capable of exchanging and receiving power with the electrical facilities 20 through the private lines 10, wherein the shared energy storage facility 50 includes a shared energy storage unit 53 capable of storing energy. A shared power generation device 51 that generates electricity from natural energy, The system receives surplus power generated through the mutual exchange of electrical equipment 20 via the private line 10 and outputs that surplus power to the shared power storage unit 53. At the same time, the power generated by the shared power generation device 51 is also output to the shared energy storage device 53. Shared power distribution unit 55, and Furthermore, if a power shortage occurs even through the mutual exchange of power between the electrical equipment 20 via the private line 10, the shared distribution unit 55 will output power to the private line 10 from the shared power generator 51 and the transmission line 8 in the order of priority, without receiving power from the private line 10. It is characterized by the following:

[0007] According to the invention described in claim 1, even if the electrical equipment 20 of each building exchanges power with each other, if surplus power is generated, the surplus power is stored in the shared battery 53. The power stored in the shared battery can be used after a power outage, thereby extending the period of use after a power outage. The electricity generated by the shared power generation device is stored in the shared energy storage device 53. The shared power distribution unit 55 outputs power to the private line 10 from the shared power generation device 51 and the transmission line 8 in order of priority, so that power is supplied within the power network system 1. If there is still a power shortage, power is supplied from the transmission line 8 to the shared power distribution unit 55 and then to the private line 10.

[0010] Claim 2 The invention described in the claim 1 The power network system 1 described above is characterized in that, if the charging power output from the private line 10 and the shared power generation device to the shared power storage device 53 via the shared distribution unit 55 is less than the rated charging power of the shared power storage device 53, the shared distribution unit 55 receives supplementary power from the transmission line 8 and outputs that supplementary power to the shared power storage device 53.

[0011] Claim 2 According to the invention described herein, the shared energy storage device 53 is charged at its rated charging power, and the remaining charge of the shared energy storage device 53 is quickly filled.

[0014] Claim 3 The invention described in the claim 1The power network system 1 described above is characterized in that, if the charge level of the shared power storage 53 is full, the shared power distribution 55 does not output the surplus power received through the private line 10 and the power generated by the shared power generation device to the shared power storage 53, but instead reverses the flow of the surplus power and the power generated by the shared power generation device to the transmission line 8.

[0015] Claim 3 According to the invention described above, the surplus power generated by the mutual exchange of electrical equipment 20 and the power generated by the shared power generation device are fed back into the transmission line 8. Therefore, electricity can be purchased.

[0018] Claim 4 The invention described in the claim 1, 2, or 3 In the power network system 1 described above, if the charge level of the shared power storage 53 is not full, the shared power distribution 55 will turn on the shared power generation device 51 The system is characterized by outputting power from these transmission lines 8 to the shared power storage unit 53 in the order of priority of the transmission lines 8.

[0019] Claim 4 According to the invention described above, while electricity is supplied from the shared power distribution unit 55 to the private line 10, the shared power storage unit 53 is charged.

[0020] Claim 5 The invention described above is as follows: 4 A power network system 1 according to any one of the above, wherein each of the electrical facilities 20 comprises a private power generation device 27 that generates electricity from natural energy, and a distribution device 31 that distributes the electricity generated within the electrical facilities 20 and to the private lines 10.

[0021] Claim 5 According to the invention described herein, mutual exchange of power between multiple electrical installations 20 is realized.

[0022] Claim 6 The invention described in the claim 5The power network system 1 described in [reference], further comprising a central management device 90, wherein each of the electrical facilities 20 has a power supply meter for measuring the amount of power supplied from the distribution board 31 to the private line 10, and an individual power management device 43 for acquiring the measured value of the power supply meter. Each of the individual power management devices 43 calculates a power storage contribution degree, a power storage contribution amount, or a power storage contribution point based on the amount of power supplied during a predetermined period measured by the power supply meter, and transmits the power storage contribution degree, the power storage contribution amount, or the power storage contribution point to the central management device 90. The central management device 90 stores the power storage contribution degree, the power storage contribution amount, or the power storage contribution point received from each of the individual power management devices 43 in association with the account through which each of the individual power management devices 43 logged in to the central management device 90.

[0023] Claim 6 According to the invention described in [claim], incentives are given to the occupants of each building, etc., to increase the power storage contribution degree, the power storage contribution amount, or the power storage contribution points associated with the account, that is, incentives to increase the amount of power supplied.

Effect of the Invention

[0026] According to the present invention, the power stored in the shared storage battery can be used after a power outage, and the utilization time after the power outage can be extended.

Brief Description of the Drawings

[0027] [Figure 1] FIG. 1 is a diagram showing a configuration example of a power network system. [Figure 2] FIG. 2 is a block diagram of electrical equipment provided in a building. [Figure 3] FIG. 3 is a block diagram of shared power storage equipment provided in a facility. [Figure 4] FIG. 4 is an explanatory diagram of power distribution by a distribution board of electrical equipment. [Figure 5] FIG. 5 is an explanatory diagram of power distribution by a distribution board of electrical equipment. [Figure 6]Figure 6 is an explanatory diagram of the distribution of power by a power distribution device in electrical equipment. [Figure 7] Figure 7 is an explanatory diagram of the distribution of power by a power distribution device in electrical equipment. [Figure 8] Figure 8 is an explanatory diagram of the distribution of power by a power distribution device in electrical equipment. [Figure 9] Figure 9 is an explanatory diagram of the distribution of power by a power distribution device in electrical equipment. [Figure 10] Figure 10 is an explanatory diagram of the distribution of power by a power distribution device in electrical equipment. [Figure 11] Figure 11 is an explanatory diagram of the distribution of power by a power distribution device in electrical equipment. [Figure 12] Figure 12 is an explanatory diagram of the distribution of power by a power distribution device in electrical equipment. [Figure 13] Figure 13 is an explanatory diagram of the distribution of power by a power distribution device in electrical equipment. [Figure 14] Figure 14 is an explanatory diagram of the distribution of power by a power distribution device in electrical equipment. [Figure 15] Figure 15 is an explanatory diagram of the distribution of power by a power distribution device in electrical equipment. [Figure 16] Figure 16 is an explanatory diagram of the distribution of power by a power distribution device in electrical equipment. [Modes for carrying out the invention]

[0028] Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below are subject to various technically preferred limitations for carrying out the present invention, but the technical scope of the present invention is not limited to the following embodiments and illustrated examples.

[0029] <Smart cities and power network systems> Figure 1 shows an example of the configuration of power network system 1. Multiple residents live in a local area, and these residents constitute a local community. Multiple buildings 2 and facilities 3 belonging to the community are constructed in the local area, and streetlights 4 belonging to the community are installed on the roads, sidewalks, gardens, or parks in that area. The buildings 2, facilities 3 and streetlights 4 in that area constitute a so-called local smart city.

[0030] In the local area, commercial power lines 8 are laid. Power lines 8 are either buried underground or suspended in the air, supported by utility poles. Power from the commercial grid is supplied to facility 3 via power lines 8, and further supplied to building 2 via facility 3 and the private lines 10 described later. In order to utilize electricity other than the commercial power supplied by power lines 8 within the community, a local power network system 1 belonging to the community is constructed in the local area and adopted in the smart city. Power network system 1 is used to share electricity generated on-site at building 2 and facility 3 within the community.

[0031] Building 2 is a detached house. Each Building 2 is inhabited by one or more residents. Each Building 2 is comprised of a residential group consisting of one or more residents. A residential group is a family. One account is assigned to each residential group, and each residential group has its own account. The accounts of residential groups residing in Building 2 are also assigned to Building 2.

[0032] Facility 3 is a shared facility used by multiple residential groups belonging to the community. Facility 3 is a building that can be used, for example, as a storage room, equipment installation room, shelter, exercise area, party venue, lounge, meeting hall, or conference room.

[0033] Streetlight 4 is turned on at night and turned off during the day. Specifically, the daytime off and nighttime on of streetlight 4 is achieved by having a light sensor. In other words, when the amount of ambient light incident on the light sensor of streetlight 4 exceeds a predetermined threshold, streetlight 4 is turned on, and when the amount of ambient light incident on the light sensor is less than or equal to the predetermined threshold, streetlight 4 is turned off. Here, streetlight 4 receives power from the private line 10 described later and consumes that power by turning on.

[0034] To join the community, you must meet all of the following conditions (1) to (4), or one, two, or three of them. (1) The applicant's building must qualify as a ZEH (Net Zero Energy House). (2) The building of the applicant must meet the specified seismic resistance level. (3) The building of the applicant must meet the specified performance grade. (4) The building of the applicant must qualify as a long-term superior quality housing.

[0035] <Power Network System> The power network system 1 comprises a private line 10, multiple electrical facilities 20, a shared energy storage facility 50, and a central control device 90.

[0036] The private power lines 10 are laid out in the local area, connecting local buildings 2 and facilities 3. The private power lines 10 are used to transmit power between these buildings 2 and facilities 3. More specifically, the private power lines 10 are used to transmit power between multiple electrical facilities 20 and shared energy storage facilities 50. The private power lines 10 are either buried underground or suspended in the air, supported by utility poles.

[0037] The central management device 90 includes a computer, display device, and input devices. The central management device 90 is connected to the internet. The central management device 90 operates a software-based management system. The management system operated by the central management device 90 has multiple accounts assigned to multiple residential groups. The functions of the central management device 90 will be described in detail later.

[0038] Multiple electrical equipment units 20 are installed in multiple buildings 2, and the accounts of residential groups residing in buildings 2 are also allocated to the electrical equipment units 20 installed in those buildings 2. These electrical equipment units 20 are connected to a private power line 10, allowing for the exchange of power between them via the private power line 10. A shared energy storage unit 50 is installed in facility 3 and is connected to the transmission line 8 and the private power line 10. The electrical equipment units 20 generate electricity using a private power generator 27 (described later) and consume the generated electricity. The electrical equipment units 20 store any electricity that is not consumed and output any surplus electricity to the private power line 10 for exchange with other electrical equipment units 20 and the shared energy storage unit 50. If the power consumption of the electrical equipment units 20 cannot be covered by the remaining generated electricity, or if the private power generator 27 does not generate electricity, the electrical equipment units 20 receive power from other electrical equipment units 20 or the shared energy storage unit 50 via the private power line 10. The shared energy storage facility 50 generates electricity using the private power generator 27 described later and stores the generated electricity. The shared energy storage facility 50 receives power from the grid power source through the transmission line 8 and stores the forward-flowing power. The shared energy storage facility 50 outputs the generated electricity, grid power, and stored electricity to the private line 10 in the order of priority. The electricity stored in the shared energy storage facility 50 is for the residents of the building 2 belonging to the community, and in the event of a power outage on the transmission line 8, the shared energy storage facility 50 supplies the stored electricity to each electrical equipment 20. Because the shared energy storage facility 50 stores electricity before a power outage, each electrical equipment 20 can use the electricity stored by the shared energy storage facility 50 for a long time after a power outage.

[0039] <Electrical equipment and shared energy storage facilities> As shown in Figure 2, each electrical facility 20 includes a general electrical wiring network 21, a critical electrical wiring network 23, one or more small power generators 25, a private power generator 27, a battery storage unit 29, a distribution unit 31, a power generation meter 33, a power supply meter 39, a power supply meter 41, and an individual power management device 43.

[0040] As shown in Figure 3, the shared energy storage facility 50 includes a shared power generator 51, a shared energy storage unit 53, a shared power distribution unit 55, an outlet 57, a power generation meter 59, a power receiving meter 61, a power supply meter 63, a shared power management device 65, a forward power flow meter 73, and a reverse power flow meter 75.

[0041] The components of the electrical equipment 20 and the shared energy storage equipment 50 will be described in detail below.

[0042] <Components of electrical equipment> <<General electrical wiring networks and critical electrical wiring networks>> The general electrical wiring network 21 and the critical electrical wiring network 23 are independent of each other and are spread throughout the building 2. The general electrical wiring network 21 and the critical electrical wiring network 23 are connected to the distribution unit 31. The critical electrical wiring network 23 consists of an electrical wiring network that supplies electricity to critical loads that are minimally necessary for the lives of residents in the event of an emergency such as a disaster or power outage. For example, lighting fixtures, refrigerators, air conditioners, water heaters, or communication network equipment (routers, wireless base stations, telephones, etc.) or two or more of these are connected to the critical electrical wiring network 23 as critical loads. The general electrical wiring network 21 consists of an electrical wiring network that supplies electricity to general loads other than critical loads.

[0043] A load is an electrical device that consumes power. In addition to the lighting fixtures, refrigerators, air conditioners, water heaters, and communication network equipment (routers, wireless base stations, wireless repeaters, telephones, etc.) mentioned above, televisions, audio equipment, recording devices, and kitchen appliances are also considered loads.

[0044] At least one critical load connected to the critical electrical wiring network 23 is connected to the processing unit 45 of the individual power management device 43 described below via signal lines or a home network. At least one general load connected to the general electrical wiring network 21 is connected to the processing unit 45 via signal lines or a home network. The signal lines or home network are laid out within the building 2.

[0045] <<Small-scale power generator>> The small power generator 25 is connected to the distribution unit 31 via the power generation meter 33. The small power generator 25 has, for example, a piezoelectric element or a motor. The small power generator 25 is installed, for example, on the floor, stairs, entrance approach, movable parts (e.g., hinges), handles, knobs, bathtubs, shower heads, toothbrushes, or beds within the building 2. When an resident unconsciously or consciously applies kinetic energy to the small power generator 25 through daily activities, the small power generator 25 generates electricity from the kinetic energy and outputs that electricity to the distribution unit 31. Daily activities refer to actions performed by residents while living in the building 2, such as opening doors, turning handles or knobs, going up and down stairs, walking, and brushing teeth.

[0046] Furthermore, guide lights may be installed on the approach to the entrance of Building 2, and a small power generator 25 that generates electricity from vibrations may also be installed on the approach to the entrance. In this case, when residents walk along the approach, the small power generator 25 generates electricity from the vibrations of walking, and the guide lights are illuminated by the generated power.

[0047] The installation of such a small power generation device 25 allows residents to carry out their daily activities without being conscious of power generation, which contributes to the storage of energy in the shared energy storage facility 50's shared energy storage unit 53.

[0048] <<Private power generation system>> The private power generation device 27 is connected to the distribution unit 31 via the power generation meter 33. The private power generation device 27 generates electricity from solar energy and outputs that electricity to the distribution unit 31.

[0049] The private power generation system 27 is a solar power generation system that includes solar panels 28, a junction box, and a power conditioner. The solar panels 28 are installed on the roof of building 2. The solar panels 28 are connected to the junction box. The junction box has current collectors and other components and collects electricity generated by each block of solar panels 28. The junction box is connected to the power conditioner. The power conditioner has a DC-AC converter and other components and converts the DC power output from the junction box into AC power, and outputs the AC power to the distribution unit 31. The power conditioner is connected to the distribution unit 31 via a power generation meter 33.

[0050] Furthermore, the private power generation device 27 may be a wind power generation device or a hydroelectric power generation device instead of a solar power generation device equipped with solar panels 28. In other words, the private power generation device 27 is not limited to a solar power generation device as long as it is a natural energy power generation device that converts natural energy into electricity. In addition, the private power generation device 27 may be a combination of multiple types of natural energy power generation devices.

[0051] <<Energy Storage Unit>> The power storage unit 29 is connected to the power distribution unit 31. When charging, the power storage unit 29 converts the power output from the power distribution unit 31 into chemical energy, thereby storing the power output from the power distribution unit 31 as chemical energy. When discharging, the power storage unit 29 converts the stored chemical energy into electricity, and outputs that electricity to the power distribution unit 31.

[0052] The battery storage unit 29 includes a power conditioner, a charge / discharge circuit, a measurement circuit, and a battery. The power conditioner includes an AC / DC converter and a DC / AC converter, etc., and converts the AC power output from the distribution unit 31 into DC power and outputs it to the charge / discharge circuit, and converts the DC power discharged from the battery via the charge / discharge circuit into AC power and outputs it to the distribution unit 31. During charging, the charge / discharge circuit charges the battery with the DC power output from the power conditioner, and during discharging, it releases the power stored in the battery to the power conditioner. The measurement circuit measures the remaining charge of the battery or its percentage and outputs the measured value of the remaining charge or its percentage to the individual power management device 43 described later. The percentage of the remaining charge refers to the ratio of the remaining charge to the full charge of the battery. Hereinafter, the remaining charge or its percentage of the battery storage unit 29 refers to the remaining charge or its percentage of the battery.

[0053] Hereinafter, the rated input of the battery 29 will also be referred to as the rated charging power, and the rated output of the battery 29 will also be referred to as the rated discharge power.

[0054] <<Distribution Unit>> The distribution unit 31 is connected to the private power generation device 27 and the small power generation device 25 via the generated electricity meter 33. The distribution unit 31 is connected to the battery storage device 29. The distribution unit 31 is connected to the private power line 10 via the supplied electricity meter 39 and the received electricity meter 41.

[0055] The distribution unit 31 is equipped with circuit breakers, switches, and other components.

[0056] The power distribution unit 31 has a power distribution function. In other words, the power distribution unit 31 distributes power between the private line 10, the private power generator 27, the small power generator 25, the battery storage unit 29, the general electrical wiring network 21, and the important electrical wiring network 23. The power distribution by the power distribution unit 31 will be explained below.

[0057] <<<Normal power distribution>>> The power distribution unit 31 can distribute the electricity generated by the private power generator 27 (the private power generation includes the electricity generated by the small power generator 25, but the electricity generated by the small power generator 25 is sufficiently lower than the electricity generated by the private power generator 27, so the electricity generated by the small power generator 25 can be ignored. The same applies hereinafter) to the private line 10, the battery storage unit 29, the general electrical wiring network 21, and the important electrical wiring network 23. The distribution of the private power generation by the power distribution unit 31 is as follows (1) to (5).

[0058] (1) When the total power consumption of both the general load and the critical load is equal to the power generated by the private power generator 27, as shown in Figure 4, the distribution unit 31 outputs the power generated to the general electrical wiring network 21 and the critical electrical wiring network 23, but does not output power to the battery 29 and the private line 10. Therefore, the general load and critical load within building 2 operate without receiving power from the electrical equipment 20 of other buildings 2 and the shared battery storage equipment 50 of facility 3.

[0059] (2) When the total power consumption of both the general load and the critical load is fully covered by the self-generated power, that is, when the total power consumption of both the general load and the critical load is less than the self-generated power, if the remaining charge of the storage battery 29 is less than a predetermined set value (the predetermined set value can be changed as described later; hereinafter this set value will be referred to as the set remaining charge), as shown in Figure 5 or Figure 6, the distribution unit 31 outputs the portion of the self-generated power equivalent to the total power consumption to the general electrical wiring network 21 and the critical electrical wiring network 23, and outputs the surplus power obtained by subtracting the total power consumption from the self-generated power (however, the maximum amount of this surplus power is the rated charging power of the storage battery 29) to the storage battery 29. Therefore, the storage battery 29 is charged while the general load and critical load are operating and consuming power. Furthermore, if the surplus power obtained by subtracting the total power consumption from the self-generated power exceeds the rated charging power of the battery 29, the distribution unit 31 outputs the surplus power obtained by subtracting the total power consumption and the rated charging power from the self-generated power to the private line 10, as shown in Figure 6. Therefore, while the general load and critical load are operating, the battery 29 is charged, and the surplus power output from the distribution unit 31 to the private line 10 is supplied to the electrical equipment 20 of other buildings 2 or the shared energy storage equipment 50 of facility 3.

[0060] (3) When the total power consumption of both the general load and the critical load is less than the self-generated power, and the remaining charge of the battery 29 is equal to or greater than the set remaining charge, as shown in Figure 7, the distribution unit 31 outputs the portion of the self-generated power equivalent to the total power consumption to the general electrical wiring network 21 and the critical electrical wiring network 23, and outputs the surplus power obtained by subtracting the total power consumption from the self-generated power to the private line 10. Therefore, while the general load and critical load are operating, the battery 29 is not charged or discharged, and the surplus power output from the distribution unit 31 to the private line 10 is supplied to the electrical equipment 20 of other buildings 2 or the shared energy storage equipment 50 of facility 3.

[0061] (4) If the total power consumption of both the general load and the critical load cannot be covered by the self-generated power, that is, if the total power consumption of both the general load and the critical load exceeds the self-generated power, and the remaining charge of the battery 29 is equal to or greater than the set remaining charge, then, as shown in Figure 8, the distribution unit 31 receives supplementary power from the private line 10, which is the total power consumption minus the self-generated power, and outputs the combined power of this supplementary power and the self-generated power to the general electrical wiring network 21 and the critical electrical wiring network 23. Therefore, while the general load and critical load are operating, the battery 29 is not charged or discharged, and the electrical equipment 20 receives supplementary power from the electrical equipment 20 of other buildings 2 or the shared battery storage equipment 50 of facility 3. If the self-generating device 27 does not generate power at night, etc., the self-generated power is zero, so all of the supplementary power received by the distribution unit 31 from the private line 10 is used by the distribution unit 31 to cover the total power consumption of the general load and the critical load.

[0062] (5) When the total power consumption of both general and critical loads exceeds the self-generated power, and the remaining charge of the battery 29 is less than the set remaining charge, as shown in Figure 9, the distribution unit 31 receives supplementary power from the private line 10 and distributes the sum of this supplementary power and the self-generated power to the general electrical wiring network 21, the critical electrical wiring network 23 and the battery 29. The battery 29 receives power from the distribution unit 31 equivalent to its charging rated power and is stored. The general electrical wiring network 21 and the critical electrical wiring network 23 receive power from the distribution unit 31 equivalent to the total power consumption, and the loads connected to the general electrical wiring network 21 and the critical electrical wiring network 23 operate. Therefore, the sum of the total power consumption and the charging power (however, the maximum of that charging power is the rated charging power of the battery 29) is equal to the sum of the supplementary power and the self-generated power.

[0063] <<<Power distribution during power outages>>> The distribution unit 31 disconnects itself from the general electrical wiring network 21 during a power outage on the transmission line 8. Because the general electrical wiring network 21 is disconnected from the distribution unit 31, the general loads within the building 2 do not consume power due to the shutdown. As a result, the remaining charge in the shared battery 53 of the shared energy storage equipment 50 of facility 3 is not wasted during a power outage on the transmission line 8, and the operating time of critical loads during a power outage on the transmission line 8 is extended. Furthermore, when the arithmetic processing unit 45 receives a signal indicating a power outage from the arithmetic processing unit 67 of the shared power management device 65 (described later), the arithmetic processing unit 45 instructs the distribution unit 31 to disconnect itself from the general electrical wiring network 21.

[0064] After the distribution unit 31 is disconnected from the general electrical wiring network 21, the distribution unit 31 distributes the privately generated power supplied from the private power generator 27 to the important electrical wiring network 23, the battery storage unit 29, and the private line 10, as described in (1) to (5) below. However, as explained in "Restrictions on the amount of power exchanged" below, in electrical equipment 20 where the supply of power from the shared battery storage facility 50 through the private line 10 is restricted, after the restriction, regardless of the explanations in (1) to (5) below, all of the privately generated power supplied from the private power generator 27 is output to the private line 10.

[0065] (1) When the total power consumption of critical loads connected to the critical electrical wiring network 23 is equal to the self-generated power, as shown in Figure 10, the distribution unit 31 outputs the self-generated power to the critical electrical wiring network 23 without receiving power from the battery 29 and the private line 10. Therefore, even in the event of a power outage on the transmission line 8, the critical loads in building 2 will continue to operate.

[0066] (2) If the total power consumption of critical loads connected to the critical electrical wiring network 23 cannot be covered by the self-generated power, that is, if the total power consumption of critical loads connected to the critical electrical wiring network 23 exceeds the self-generated power, and the remaining charge of the battery 29 is zero, then, as shown in Figure 11, the distribution unit 31 receives supplementary power from the private line 10, which is the total power consumption minus the self-generated power, and outputs the combined power of this supplementary power and the self-generated power (corresponding to the total power consumption of the critical loads) to the critical electrical wiring network 23. Therefore, even in the event of a power outage on the transmission line 8, the electrical equipment 20 of building 2 receives power from the electrical equipment 20 of other buildings 2 or the shared battery storage equipment 50 of facility 3 via the private line 10 to meet the power demand of the critical loads in building 2. If the self-generating device 27 does not generate power at night, etc., the self-generated power is zero, so all of the supplementary power received by the distribution unit 31 from the private line 10 is used by the distribution unit 31 to cover the total power consumption of the critical loads.

[0067] (3) If the total power consumption of critical loads connected to the critical electrical wiring network 23 exceeds the power generated by the private power supply, and the remaining charge of the battery 29 is not zero, the distribution unit 31 receives discharge power from the battery 29, which is the total power consumption minus the power generated by the private power supply (however, the maximum amount of this discharge power is the rated discharge power of the battery 29), as shown in Figure 12 or Figure 13, and outputs this discharge power and the power generated by the private power supply to the critical electrical wiring network 23. If the total power consumption of the critical loads is still not covered, that is, if the sum of the rated discharge power of the battery 29 and the power generated by the private power supply is less than the total power consumption of the critical loads, the distribution unit 31 receives supplementary power from the private power line 10, which is the sum of the two amounts minus the total power consumption of the critical loads, as shown in Figure 13. Therefore, even in the event of a power outage, the discharged power from the battery 29 is used to meet the power demand of critical loads in building 2. If there is still a power shortage, the electrical equipment 20 of building 2 receives power from the electrical equipment 20 of other buildings 2 or the shared battery storage equipment 50 of facility 3 via the private line 10. If the private power generator 27 does not generate power at night or other times, the private power generation is zero, and all the power received by the distribution unit 31 from the private line 10, the battery 29, or both is used by the distribution unit 31 to meet the total power consumption of critical loads.

[0068] (4) When the total power consumption of critical loads connected to the critical electrical wiring network 23 is fully covered by the self-generated power, that is, when the total power consumption of critical loads connected to the critical electrical wiring network 23 is less than the self-generated power, and the charge level of the battery 29 is full, as shown in Figure 14, the distribution unit 31 outputs the portion of the self-generated power equivalent to the total power consumption to the critical electrical wiring network 23, and outputs the surplus power obtained by subtracting the total power consumption from the self-generated power to the private line 10. Therefore, even in the event of a power outage, the critical loads in building 2 will continue to operate, and the surplus power will be supplied to the electrical equipment 20 of other buildings 2, the shared energy storage equipment 50 of facility 3, and the streetlights 4.

[0069] (5) If the total power consumption of critical loads connected to the critical electrical wiring network 23 is less than the self-generated power, and the remaining charge of the battery 29 is not full, as shown in Figure 15 or Figure 16, the distribution unit 31 outputs the portion of the self-generated power equivalent to the total power consumption to the critical electrical wiring network 23, and outputs the surplus power obtained by subtracting the total power consumption from the self-generated power (however, the maximum amount of this surplus power is the rated charging power of the battery 29) to the battery 29. Furthermore, if the surplus power obtained by subtracting the total power consumption from the self-generated power exceeds the rated charging power of the battery 29, the distribution unit 31 outputs the surplus power obtained by subtracting the total power consumption and the rated charging power from the self-generated power to the private line 10. Therefore, even in the event of a power outage, critical loads in building 2 continue to operate, the battery 29 is charged, and if surplus power is still generated, the surplus power is supplied to the electrical equipment 20 of other buildings 2, the shared energy storage equipment 50 of facility 3, and the streetlights 4.

[0070] In the above explanation, it was assumed that when the processing unit 45 receives a signal indicating a power outage, the distribution unit 31 disconnects itself from the general electrical wiring network 21. However, such disconnection is not required. In this case, in the above explanation of "power distribution during a power outage," the explanation regarding the critical electrical wiring network 23 applies to both the critical electrical wiring network 23 and the general electrical wiring network 21, the explanation regarding critical loads applies to both general loads and critical loads, and the explanation regarding the total power consumption of critical loads applies to the total power consumption of both general loads and critical loads.

[0071] <<Electricity meter>> The power generation meter 33 measures the amount of power generated by the private power generation device 27 and outputs the measured value to the individual power management device 43, in particular the calculation processing device 45. The amount of power generated measured by the power generation meter 33 may be cumulative from the start of measurement by the power generation meter 33, or it may be cumulative from the time of reset by resetting to zero at predetermined intervals (for example, one month).

[0072] <<Universal electricity meter>> The shared electricity meter 39 measures the amount of shared electricity output from the distribution unit 31 to the private line 10 and outputs the measured value to the individual power management device 43, in particular the calculation processing unit 45. The amount of shared electricity measured by the shared electricity meter 39 may be cumulative from the start of measurement by the shared electricity meter 39, or it may be cumulative from the time of reset by resetting to zero at predetermined intervals (for example, one month).

[0073] <<Accommodated electricity meter>> The power meter 41 measures the amount of power received from the private line 10 to the distribution unit 31 and outputs the measured value to the individual power management device 43, in particular the calculation processing unit 45. The amount of power generated measured by the power meter 41 may be cumulative from the start of measurement by the power meter 41, or it may be cumulative from the time of reset by resetting to zero at predetermined intervals (for example, one month).

[0074] <<Individual power management device>> The individual power management device 43 is connected to the critical electrical wiring network 23 and operates by receiving power from the critical electrical wiring network 23. The individual power management device 43 may also have a battery. In this case, the individual power management device 43 operates using the discharged power of the battery when it cannot receive power from the critical electrical wiring network 23.

[0075] The individual power management device 43 is a small, board-type computer system referred to as a Home Energy Management System (HEMS). The individual power management device 43 is installed on the interior wall of building 2. The individual power management device 43 has a processing unit 45, a display unit 47, and an input unit 49.

[0076] The display unit 47 is a matrix display, a segment display, or a combination thereof. The display unit 47 displays information according to the signals input from the arithmetic processing unit 45.

[0077] The input unit 49 has multiple push buttons and switches. When the input unit 49 is operated by a resident, it outputs a signal to the arithmetic processing unit 45 according to the operation. As mentioned above, the set charge level can be changed, and a resident can change the set charge level using the input unit 49. In other words, when a resident inputs the value of the set charge level using the input unit 49, the arithmetic processing unit 45 acquires the value of the set charge level and sets the battery 29 to that acquired value. As a result, when the charge level of the battery 29 exceeds the set charge level, the battery 29 cannot be charged any further, even if the battery 29 is not yet full. In addition, when a resident inputs private information of residents living in their building 2 using the input unit 49, the arithmetic processing unit 45 stores the private information and transmits it to the central management device 90. The central management device 90 stores the private information received from each arithmetic processing unit 45, linking it to an account. Private information includes, for example, the number of family members, family structure (e.g., single person, married couple only, single parent and unmarried children only, three generations, other households), age, gender, occupation or lifestyle (e.g., morning person, daytime person, evening person, late-night person), health status, presence or absence of illness or injury, or two or more combinations of these.

[0078] The arithmetic processing unit 45 stores a program. The functions of the arithmetic processing unit 45 of this disclosure are realized by the execution of the program by the arithmetic processing unit 45.

[0079] The arithmetic processing unit 45 is connected to the internet. The arithmetic processing unit 45 communicates with the central management unit 90 via the internet. The arithmetic processing unit 45 is configured with account information related to the accounts held by the residential group. The arithmetic processing unit 45 uses this account information to log in to the management system operated by the central management unit 90.

[0080] The computing unit 45 is connected to a local area network that is spread throughout the local area where the power network system 1 is constructed. The computing unit 45 communicates with the shared power management device 65 of facility 3 via the Internet or the local area network.

[0081] The processing unit 45 can access the servers of housing-related service providers via the internet to receive housing-related services. For example, the processing unit 45 can receive real-time local weather information or receive and update its own software.

[0082] The arithmetic processing unit 45 controls loads within the building 2, connected via signal lines, wireless, or a home network, according to output signals from the input unit 49 in response to resident operations, or according to an automatic control program. For example, the arithmetic processing unit 45 controls the on / off state of loads and adjusts their operating intensity. The arithmetic processing unit 45 displays the operating status of these loads, such as on state, off state, or set operating intensity, on the display unit 47. Loads controlled by the arithmetic processing unit 45 include, for example, air conditioners, water heaters, floor heaters, and lighting.

[0083] The processing unit 45 is connected to the battery 29 by signal lines, wirelessly, or via a home network, and manages the remaining charge or percentage of the battery 29.

[0084] The processing unit 45 manages the amount of power generated, the amount of power supplied, and the amount of power supplied, which are measured by the power generation meter 33, the power supply meter 39, and the power received meter 41, respectively.

[0085] The arithmetic processing unit 45 is connected to the distribution unit 31 by signal lines and manages generated power, supplied power, received power, charging power, discharged power, critical load power consumption, general load power consumption, and total power consumption. Here, generated power refers to the power generated by the private power generation device 27. Supply power refers to the power output from the distribution unit 31 to the private line 10. Received power refers to the power received from the private line 10 to the distribution unit 31. Charging power refers to the power charged from the distribution unit 31 to the battery 29. Discharged power refers to the power discharged from the battery 29 to the distribution unit 31. Critical load power refers to the total power consumption of critical loads connected to the critical electrical wiring network 23. General load power refers to the total power consumption of general loads connected to the general electrical wiring network 21. The sum of general load power and critical load power corresponds to total power consumption.

[0086] <<<Examples of management performed by the processing unit of individual power management devices>>> The management performed by the arithmetic processing unit 45 includes, for example, the following (1) to (5).

[0087] (1) Acquisition The arithmetic processing unit 45 detects generated power, supplied power, received power, charging power, discharge power, critical load power consumption, general load power consumption, and total power consumption through the distribution unit 31 and acquires these detected values. The arithmetic processing unit 45 also acquires measured values ​​of generated power, supplied power, and received power from the generated power meter 33, supplied power meter 39, and received power meter 41, respectively. The arithmetic processing unit 45 acquires measured values ​​of the remaining charge of the storage battery 29 or its percentage from the storage battery 29.

[0088] (2) Aggregation The arithmetic processing unit 45 performs various calculations using at least one detected value from among generated power, supplied power, supplied power, charging power, discharge power, critical load power consumption, general load power consumption, and total power consumption, and at least one measured value from among generated power, supplied power, supplied power, remaining charge, or remaining charge percentage. For example, the arithmetic processing unit 45 calculates the real-time self-consumption rate by subtracting the total power consumption from the generated power and dividing the difference by the generated power. Also, for example, the arithmetic processing unit 45 calculates the periodic self-consumption rate at predetermined intervals (e.g., one month) by subtracting the supplied power from the generated power for the predetermined period (e.g., one month) and dividing the difference by the generated power. Also, for example, the arithmetic processing unit 45 calculates the supplied power for the predetermined period (e.g., one month) at predetermined intervals (e.g., one month), calculates the supplied amount by multiplying the supplied power amount by the supplied unit price, and converts the supplied amount into economically valuable, convertible supplied points. Furthermore, for example, the arithmetic processing unit 45 calculates the amount of electricity supplied for a predetermined period (for example, one month) at predetermined intervals (for example, one month), calculates the amount of electricity supplied by multiplying the amount of electricity supplied by the unit price of electricity supplied, and converts the amount of electricity supplied into points of electricity supplied with economic value. Here, the unit price of electricity supplied during a power outage is set higher than the unit price of electricity supplied during normal times, and the unit price of electricity supplied during a power outage is set higher than the unit price of electricity supplied during normal times. Also, the higher the disaster resistance of the private power generator 27 or the battery storage unit 29 or both, the higher the unit price of electricity supplied, thus providing an incentive to improve the disaster resistance of the private power generator 27 or the battery storage unit 29. Note that the higher part or all of the private power generator 27 or the battery storage unit 29 is installed, the higher the disaster resistance of the private power generator 27 or the battery storage unit 29. Furthermore, if part or all of the private power generation system 27 and the battery storage system 29 are installed indoors, the disaster resilience of the private power generation system 27 and the battery storage system 29 is enhanced.

[0089] (3)Memory The arithmetic processing unit 45 stores the detected and measured values ​​acquired as described in (1) above in chronological order. The arithmetic processing unit 45 also stores the calculation results as described in (2) above in chronological order.

[0090] (4)Display The arithmetic processing unit 45 displays at least one of the real-time detected values ​​and measured values ​​acquired as described in (1) above on the display unit 47. The arithmetic processing unit 45 displays at least one of the real-time calculation results calculated as described in (2) above on the display unit 47.

[0091] (5) Send The arithmetic processing unit 45 transmits the detected and measured values ​​acquired as described in (1) above to the shared power management device 65 and the central management device 90 via the internet. The arithmetic processing unit 45 also transmits the calculation results as described in (2) above to the shared power management device 65 and the central management device 90.

[0092] <<<Display of operating status of shared energy storage facility>>> As explained later in "Example of Management Performed by the Computing Unit of the Shared Power Management Device," the computing unit 67 of the shared power management device 65 transmits the detected value of the power generated by the shared power generator 51 to the computing unit 45 of each individual power management device 43. The computing unit 45 receives the detected value of the power generated transmitted by the computing unit 67 and displays the detected value on the display unit 47.

[0093] Similarly, the arithmetic processing unit 45 displays the detected values ​​of the received power and supplied power received from the arithmetic processing unit 67 on the display unit 69. Furthermore, the arithmetic processing unit 45 displays the measured values ​​of the generated power, received power, and supplied power received from the arithmetic processing unit 67 on the display unit 47. Furthermore, the arithmetic processing unit 45 displays the measured value of the remaining charge or its percentage received from the arithmetic processing unit 67 on the display unit 47.

[0094] Therefore, residents can monitor the operating status of the shared energy storage equipment 50 within facility 3 while remaining in their own building 2. In other words, residents can monitor the following (1) to (6):

[0095] (1) Power and amount of electricity generated by the shared power generation device 51 (2) Power and amount of power supplied from the shared energy storage facility 50 to the electrical equipment 20 via the private line 10 (3) Power and amount of electricity received from the electrical equipment 20 to the shared energy storage equipment 50 via the private line 10 (4) The remaining charge or percentage of the shared battery 53 (5) Forward power flow and forward power flow amount from the transmission line 8 to the shared energy storage facility 50 (6) Reverse power flow and reverse power flow amount from the shared energy storage facility 50 to the transmission line 8

[0096] <<<Cashback, point rewards, and thank-you gifts>>> Under normal circumstances, the processing unit 45 subtracts a reference value (or the sum of the received power and the reference value) from the amount of electricity exchanged during a predetermined period (for example, one month) at predetermined intervals (for example, one month). If the difference obtained in this way (hereinafter referred to as the energy storage contribution) is positive, it means that the residents of building 2 have made a significant contribution to the exchange of electricity, particularly to the storage of electricity in the shared energy storage facility 50 described later. Furthermore, the greater the energy storage contribution obtained in this way, the greater the contribution to the exchange of electricity, particularly to the storage of electricity in the large shared energy storage unit 53 described later. By providing economic rewards to those who contribute to the exchange of electricity, an incentive for energy-saving living and the exchange of electricity is stimulated.

[0097] To achieve this, the arithmetic processing unit 45 calculates the energy storage contribution amount by multiplying the energy storage contribution level calculated as described above by the energy storage unit price. The arithmetic processing unit 45 also converts the energy storage contribution amount into convertible energy storage contribution points with economic value. When the arithmetic processing unit 45 transmits the energy storage contribution level, energy storage contribution amount, and energy storage contribution points to the central management unit 90, the central management unit 90 receives the energy storage contribution level, energy storage contribution amount, and energy storage contribution points and stores this received data linked to the account. The administrator or other person then grants residents money or energy storage contribution points corresponding to the energy storage contribution amount stored in the central management unit 90, or delivers a thank-you gift corresponding to the energy storage contribution amount through a contractor or other person.

[0098] The reference value is a value greater than zero. The reference value is the minimum amount of electricity that each resident of building 2 should contribute to the storage of the shared energy storage facility 50 described later. The reference value is either a value set individually for each building 2 or account, or a value common to all buildings 2. An example of a reference value set individually for each building 2 or account is one corresponding to the number of residents in building 2. The reference value may also be a constant or a variable. If the reference value is a variable, the arithmetic processing unit 45 may calculate the reference value, or the central management device 90 may calculate the reference value and transmit it to the arithmetic processing unit 45.

[0099] Since increasing energy storage contribution, energy storage amount, and energy storage contribution points brings economic benefits to residents, they are given an incentive to increase their energy storage contribution, energy storage amount, or energy storage contribution points, that is, an incentive to increase the amount of electricity they exchange. In addition, residents will live in a way that increases the amount of electricity they exchange in order to receive rewards.

[0100] <<<Rank Display>>> As will be explained later in the "ranking" section, the central management device 90 transmits the classification rank, total number of accounts in each category, overall rank, and total number of accounts to each processing unit 45. Each processing unit 45 then receives the classification rank, total number of accounts in each category, overall rank, and total number of accounts, and displays the classification rank, total number of accounts in each category, overall rank, and total number of accounts on the display unit 47.

[0101] <<<Status within the category>>> As will be explained later in the section on "Status Distribution within a Class," the central management device 90 transmits the total power consumption, real-time self-consumption rate, period-based self-consumption rate, amount of shared power, amount of shared power, shared points, energy storage contribution, energy storage contribution amount, or energy storage contribution points for all accounts belonging to the common class to the arithmetic processing unit 45. Then, each arithmetic processing unit 45 receives the total power consumption, real-time self-consumption rate, period-based self-consumption rate, amount of shared power, amount of shared power, shared points, energy storage contribution, energy storage contribution amount, or energy storage contribution points for all accounts belonging to the common class, and displays the total power consumption, real-time self-consumption rate, period-based self-consumption rate, amount of shared power, amount of shared power, shared points, energy storage contribution, energy storage contribution amount, or energy storage contribution points for each account on the display unit 47.

[0102] <<<Restrictions on the amount of electricity exchanged>>> In order to ensure that residents of each building 2 can fairly utilize the remaining charge in the shared battery 53 of the shared energy storage facility 50 during a power outage, the amount of electricity that each building 2 can receive from the shared energy storage facility 50 (described below) during a power outage is limited to a predetermined threshold. Furthermore, after the limit is reached, the power generated by the private power generator 27 cannot be freely used by the electrical equipment 20. This will be explained in detail below.

[0103] When the arithmetic processing unit 45 receives a signal from the arithmetic processing unit 67 of the shared power management device 65 (described later) indicating a power outage, it obtains the measured value from the power generation meter 33 at that time. This is the start of the power outage, and the measured value from the power generation meter 33 at this time is called the power generation amount at the start of the power outage. Furthermore, the arithmetic processing unit 45 obtains the measured value from the power supply meter 41. This is also the start of the power outage, and the measured value from the power supply meter 41 at this time is called the power supply amount at the start of the power outage. Furthermore, the arithmetic processing unit 45 obtains the measured value from the power supply meter 39. This is also the start of the power outage, and the measured value from the power supply meter 39 at this time is called the power supply amount at the start of the power outage.

[0104] Subsequently, the arithmetic processing unit 45 subtracts the amount of electricity generated at the start of the power outage from the measurement value of the power generation meter 33. This difference is the amount of electricity generated after the power outage. The arithmetic processing unit 45 subtracts the amount of electricity received at the start of the power outage from the measurement value of the electricity received meter 41. This difference is the amount of electricity received after the power outage. The arithmetic processing unit 45 subtracts the amount of electricity supplied at the start of the power outage from the measurement value of the electricity supplied meter 39. This difference is the amount of electricity supplied after the power outage. Then, the arithmetic processing unit 45 adds the amount of electricity generated after the power outage to the amount of electricity received after the power outage, and subtracts the amount of electricity supplied after the power outage from the sum. The value obtained in this way is equal to the sum of the amount of electricity consumed by the community after the power outage and the amount of electricity received after the power outage, from the amount of electricity generated after the power outage. Such a value is the amount of electricity consumed by building 2, considering the amount of electricity consumed by the community as well as the amount of electricity consumed by the community. Such a value is called the individual power consumption amount.

[0105] The arithmetic processing unit 45 then compares the individual power consumption with a predetermined threshold. If the individual power consumption exceeds the predetermined threshold, the arithmetic processing unit 45 instructs the distribution unit 31 to disconnect from the critical electrical wiring network 23 and the battery storage 29. As a result, the electrical equipment 20 does not receive power from other electrical equipment 20 and the shared battery storage 50, but it does not consume the power generated by the private power generator 27 and instead provides power to other electrical equipment 20 and the shared battery storage 50. If the distribution unit 31 does not disconnect from the general electrical wiring network 21 when the arithmetic processing unit 45 receives a signal indicating a power outage, the arithmetic processing unit 45 instructs the distribution unit 31 to disconnect from the general electrical wiring network 21 when the individual power consumption exceeds the predetermined threshold.

[0106] Here, the predetermined threshold is a value set individually for each building 2, electrical equipment 20, or account. Alternatively, the predetermined threshold is a value common to each building 2, each electrical equipment 20, or each account. Examples of predetermined thresholds set individually for each building 2, electrical equipment 20, or account include those determined based on the amount of electricity exchanged (this amount of electricity exchanged is calculated by the arithmetic processing unit 45 as described above) or the energy storage contribution (this energy storage contribution is calculated by the arithmetic processing unit 45 as described above) during a predetermined period before the power outage (e.g., one month), or those corresponding to the number of residents in building 2, or those determined based on private information (private information is stored by the arithmetic processing unit 45 and the central management unit 90), or those obtained by adding a value corresponding to the number of residents in building 2 to a value corresponding to the amount of electricity exchanged (this amount of electricity exchanged is calculated by the arithmetic processing unit 45 as described above) or the energy storage contribution (this energy storage contribution is calculated by the arithmetic processing unit 45 as described above) during a predetermined period before the power outage (e.g., one month). Furthermore, the number of residents in building 2 corresponds to the number of family members in the private information stored by the arithmetic processing unit 45 or the central management unit 90, as entered by the residents via the input unit 49, as described above.

[0107] Furthermore, the predetermined threshold may be a constant or a variable. If the predetermined threshold is a variable, the arithmetic processing unit 45 may calculate the predetermined threshold, or the arithmetic processing unit 67 of the central control unit 90 or the shared power management unit 65 described later may calculate the predetermined threshold and transmit it to the arithmetic processing unit 45. For example, the arithmetic processing unit 45 or the central control unit 90 may add a value corresponding to the number of occupants of building 2 to a value corresponding to the amount of electricity exchanged or the energy storage contribution during a predetermined period before the power outage (for example, one month), and the sum of these values ​​may be used as a predetermined threshold individually set for each electrical equipment 20. Alternatively, the arithmetic processing unit 45 or the central control unit 90 may determine a value based on the amount of electricity exchanged (this amount of electricity exchanged is calculated by the arithmetic processing unit 45 as described above) or the energy storage contribution (this energy storage contribution is calculated by the arithmetic processing unit 45 as described above) during a predetermined period before the power outage (for example, one month), and the determined value may be used as a predetermined threshold individually set for each electrical equipment 20. Alternatively, the arithmetic processing unit 67 acquires a measured value of the remaining charge from the shared battery 53 when a power outage begins, divides that measured value by the number of buildings 2, and the quotient is used as a predetermined threshold common to each electrical equipment 20. Alternatively, the central control device 90 receives a measured value of the remaining charge from the shared battery 53 from the arithmetic processing unit 67 when a power outage begins, divides that measured value by the number of buildings 2, and the quotient is used as a predetermined threshold common to each electrical equipment 20.

[0108] If the predetermined threshold is a common value for each building 2, then the amount of electricity that can be supplied to the electrical equipment 20 of each building 2 during a power outage will be common to all buildings 2.

[0109] If the predetermined threshold is the same for all electrical equipment 20 in building 2, then in the event of a power outage, residents of each building 2 can more fairly utilize the remaining charge of the shared battery 53 in facility 3.

[0110] If the predetermined threshold is the quotient obtained by dividing the remaining charge of the shared battery 53 by the number of buildings 2, the remaining charge of the shared battery 53 of facility 3 is divided equally among the electrical equipment 20 of each building 2.

[0111] If a predetermined threshold is set individually for each electrical equipment 20 in building 2, then in the event of a power outage, the remaining charge in the shared battery 53 of facility 3 will be divided among the electrical equipment 20 of each building 2 according to the individual circumstances of the residents of each building 2.

[0112] If a predetermined threshold is determined individually based on the number of residents in each building 2, then in the event of a power outage, the residents of each building 2 can more fairly utilize the remaining charge in the shared battery storage 53 of facility 3.

[0113] If a predetermined threshold is determined based on the amount of electricity exchanged before a power outage, residents of each building 2 will adopt lifestyles that increase the amount of electricity exchanged before a power outage in order to receive more electricity during the outage.

[0114] If the predetermined threshold is determined based on private information, the amount of electricity available after the start of the power outage will take into account the individual circumstances of the residents of each building 2.

[0115] <<<Surcharge on the unit price for electricity exchanged for amounts exceeding a certain limit>>> In the event of a power outage, the amount of electricity that each building 2 can receive from the shared energy storage facility 50 (described below) will be limited as described above, but the unit price for receiving electricity will be increased. Specifically, it will be as follows:

[0116] When the arithmetic processing unit 45 detects a power outage in the transmission line 8 via the distribution unit 31, it obtains the measured value of the power received meter 41 at that time from the power supply meter 39. This measured value is called the power received at the start of the power outage.

[0117] Subsequently, the processing unit 45 subtracts the amount of power received at the start of the power outage from the measured value of the power received meter 41 and compares the difference with a predetermined threshold. This difference increases when the power generation equipment 20 of building 2 receives power from the shared energy storage equipment 50 of facility 3 after the power outage begins.

[0118] If the difference in the comparison exceeds a predetermined threshold, the arithmetic processing unit 45 acquires and stores the measured value of the power consumption meter 41 at that time. This measured value is called the power consumption amount at the start of the premium adjustment.

[0119] Subsequently, when the arithmetic processing unit 45 detects the energization of the transmission line 8 through the distribution unit 31, it acquires and stores the measured value of the power-receiving energy meter 41 at that time from the power-receiving energy meter 39. This measured value is called the power-receiving amount at the end of the overcharge period.

[0120] The arithmetic processing unit 45 then subtracts the amount of electricity supplied at the start of the surcharge from the amount of electricity supplied at the end of the surcharge period, and multiplies the difference by the surcharge unit price. This product is called the surcharge amount. Next, the arithmetic processing unit 45 adds the surcharge amount to the amount of electricity supplied for a predetermined period (for example, one month) calculated as described above. Furthermore, the amount of electricity received with the surcharge added is subject to (3) storage, (4) display, and (5) transmission in “Examples of management performed by the processing unit of the individual power management device”.

[0121] <<<Load control performed by the processing unit of the individual power management device>>> During a power outage, the power consumption of loads within Building 2 may be limited, or their functions may be restricted. This will be explained in detail below.

[0122] When the arithmetic processing unit 45 detects a power outage in the transmission line 8 through the distribution unit 31, it reduces the operating intensity of loads connected via signal lines, wireless, or home networks, limiting the operating intensity to a predetermined percentage (e.g., 25%) of the maximum operating intensity. For example, if the load is a dimmer, the arithmetic processing unit 45 reduces the illumination intensity of the dimmer to a predetermined percentage of the maximum illumination intensity.

[0123] When the arithmetic processing unit 45 detects a power outage in the power transmission line 8 through the distribution unit 31, it restricts the functionality of loads connected via signal lines, wireless, or home networks. For example, if the load is a luminaire with a color adjustment function, the arithmetic processing unit 45 restricts the luminaire's light emission color to a predetermined color and adjusts it to that color, preventing the luminaire's light emission color from being adjusted to any other color.

[0124] <<<Adjustment of interchangeable power amount / accommodated power amount>>> As described above, the set charge level can be changed, and the resident inputs the value of the set charge level using the input unit 49. The processing unit 45 then retrieves the value of the set charge level and sets the battery 29 to that retrieved value. As a result, when the charge level of the battery 29 exceeds the set charge level, it is no longer possible to charge the battery 29 further, even if the battery 29 is not yet fully charged.

[0125] Therefore, when a resident decreases the set charge level value using the input unit 49, the amount of electricity that can be stored in the battery 29 decreases, which increases the amount of electricity that can be supplied to other buildings 2 and the shared energy storage facility 50, and decreases the amount of electricity that can be supplied from other buildings 2 and the shared energy storage facility 50. On the other hand, when a resident increases the set charge level value using the input unit 49, the amount of electricity that can be stored in the battery 29 increases, which decreases the amount of electricity that can be supplied to other buildings 2 and the shared energy storage facility 50, and increases the amount of electricity that can be supplied from other buildings 2 and the shared energy storage facility 50. Thus, residents can freely adjust the amount of electricity they supply and receive by increasing or decreasing the set charge level.

[0126] <<<Pseudo power outage (1)>>> The distribution unit 31 is equipped with a simulated power outage switch. When a resident or other user turns on the simulated power outage switch of the distribution unit 31, the distribution unit 31 disconnects itself from the private line 10. In this state, the distribution unit 31 distributes power during a power outage as described above. Therefore, residents can understand the power consumption of their load during a power outage and develop a life continuity plan.

[0127] Furthermore, when the distribution unit 31 is disconnected from the power transmission line 8 by the simulated power outage switch, the processing unit 45 limits the power consumption of the load or restricts its functions as described above. If the load is a light fixture with dimming and color adjustment functions, the illumination intensity and color of the light fixture are limited to produce a predetermined effect. For example, a moody atmosphere, the appearance of outdoor lighting at night, a starry sky, or a campfire can be created.

[0128] Furthermore, if residents of each building 2 simultaneously turn on the simulated power outage switch on the distribution unit 31 within their respective buildings 2, they can understand the status of power exchange from the shared energy storage facility 50 (described later) to the electrical equipment 20 in each building 2. This allows for the creation of better plans for continuing daily life.

[0129] <<<Pseudo power outage (2)>>> The arithmetic processing unit 67 of the shared power management device 65 or the central management device 90 simultaneously transmits a simulated power outage command signal to the arithmetic processing unit 45 of each building 2. The timing at which the arithmetic processing unit 67 transmits the simulated power outage command signal is, for example, set in the program or when an administrator or the like issues a command to the arithmetic processing unit 67 via the input unit 71 described later. The same applies to the timing at which the central management device 90 transmits the simulated power outage command signal.

[0130] When each processing unit 45 receives a command signal, it causes the distribution unit 31 to perform a cutoff that disconnects it from the private line 10. As a result, each distribution unit 31 performs the power distribution during a power outage as described above. Therefore, residents can understand the power consumption of their loads during a power outage and develop a life continuity plan.

[0131] Furthermore, each processing unit 45 limits the power consumption or functionality of the load as described above. If the load is a light fixture with dimming and color adjustment functions, the illumination intensity and color of the light fixture are limited to produce a predetermined effect. For example, a moody atmosphere, the appearance of outdoor lighting at night, a starry sky, or a campfire can be recreated.

[0132] <Components of a shared energy storage system> Next, we will explain in detail the shared power generation equipment 51, shared battery storage unit 53, shared distribution unit 55, outlets 57, power generation meter 59, power receiving meter 61, power supply meter 63, shared power management device 65, forward power flow meter 73, and reverse power flow meter 75 of the shared power storage facility 50.

[0133] <<Shared power generation equipment>> The shared power generator 51 is connected to the shared power distribution unit 55 via a power generation meter 59. The shared power generator 51 generates electricity from solar energy and outputs that electricity to the shared power distribution unit 55.

[0134] The shared power generation system 51 is a solar power generation system that includes solar panels 52, a junction box, and a power conditioner. The solar panels 52 are installed on the roof of facility 3. The solar panels 52 are connected to the junction box. The junction box has current collectors and other components and collects electricity generated by each block of solar panels 52. The junction box is connected to the power conditioner. The power conditioner has a DC-AC converter and other components and converts the DC power output from the junction box into AC power, and outputs the AC power to the shared distribution unit 55. The power conditioner is connected to the shared distribution unit 55 via a power generation meter 59.

[0135] Furthermore, the shared power generation device 51 may be a wind power generation device or a hydroelectric power generation device instead of a solar power generation device equipped with solar panels 52. In other words, the shared power generation device 51 is not limited to a solar power generation device as long as it is a renewable energy power generation device that converts natural energy into electricity. In addition, the shared power generation device 51 may be a combination of multiple types of renewable energy power generation devices.

[0136] Since the shared energy storage facility 50 has a shared power generator 51, the shared battery 53 of the shared energy storage facility 50 is charged by the shared power generator 51, and the electrical equipment 20 of each building 2 can receive part or all of the power generated by the shared power generator 51.

[0137] <<Shared storage device>> The shared power storage unit 53 is connected to the shared power distribution unit 55. When charging, the shared power storage unit 53 converts the power output from the shared power distribution unit 55 into chemical energy and stores it as chemical energy. When discharging, the shared power storage unit 53 converts the stored chemical energy into electricity and outputs that electricity to the shared power distribution unit 55.

[0138] The shared power storage unit 53 includes a power conditioner, a charge / discharge circuit, a measurement circuit, and a battery. The power conditioner includes an AC / DC converter and a DC / AC converter, and converts the AC power output from the shared distribution unit 55 into DC power and outputs it to the charge / discharge circuit. It also converts the DC power discharged from the battery via the charge / discharge circuit into AC power and outputs it to the shared distribution unit 55. During charging, the charge / discharge circuit charges the battery with the DC power output from the power conditioner, and during discharging, it releases the power stored in the battery to the power conditioner. The measurement circuit measures the remaining charge of the battery or its percentage and outputs the measured value of the remaining charge or its percentage to the shared power management device 65 described later.

[0139] The charging capacity, rated charging power, and rated discharge power of the shared battery 53 are sufficiently larger than those of the battery 29, respectively. The charging capacity, rated charging power, and rated discharge power of the shared battery 53 are designed based on the total number of residents belonging to the community. Because the charging capacity of the shared battery 53 is determined based on the total number of residents belonging to the community, an amount of electricity appropriate for the total number of people can be stored in the shared battery 53 on a regular basis.

[0140] <<Electrical outlet>> Outlet 57 is connected to a shared power distribution unit 55. When an electrical appliance is plugged into outlet 57, the appliance is powered by the shared power generator 51 or shared battery storage unit 53 via the shared power distribution unit 55. In the event of a disaster, power outage, or failure of electrical equipment 20, residents may use outlet 57 to operate their electrical appliances in their own building 2. However, who can connect electrical appliances to outlet 57 is restricted to residents belonging to the community, according to rules and regulations.

[0141] <<Shared power distribution device>> The shared power distribution unit 55 is connected to the shared power generation device 51 via the power generation meter 59. The shared power distribution unit 55 is connected to the shared energy storage unit 53. The shared power distribution unit 55 is connected to the grid power transmission line 8 via the forward power flow meter 73 and the reverse power flow meter 75. The shared power distribution unit 55 is connected to the private line 10 via the power receiving meter 61 and the power supply meter 63.

[0142] The shared power distribution unit 55 has a power outage detection function. In other words, the shared power distribution unit 55 detects power outages, that is, power outages in the transmission line 8. The shared power distribution unit 55 has a power distribution function. In other words, the shared power distribution unit 55 distributes power between the transmission line 8, the private line 10, the shared power generation device 51, and the shared battery storage unit 53. The power distribution by the shared power distribution unit 55 will be explained below.

[0143] <<<Normal power distribution>>> The shared power distribution unit 55 distributes power as follows (1) or (2) when no power outage is detected on the transmission line 8.

[0144] (1) When a surplus of electricity occurs even when the power equipment 20 of each building 2 is exchanged between them. When the power demand of the electrical equipment 20 of each building 2 and each street light 4 is met by the total power generated by the private power generators 27 of each building 2 and the total power discharged by the battery 29, that is, when the total power that can be mutually exchanged between the private line 10 and the distribution stations 31 of each building 2 is higher than the total power that can be mutually exchanged between the distribution stations 31 of each building 2 and the private line 10, and there is also a surplus in power consumption by the street lights 4, the shared distribution station 55 of facility 3 receives the surplus power from the private line 10 and outputs that surplus power to the shared battery 53. In this case, when the shared power generator 51 is generating power, the shared distribution station 55 also outputs the power generated by the shared power generator 51 to the shared battery 53. However, if the charging power output from the private line 10 and the shared power generator 51 to the shared battery 53 via the shared distribution unit 55 is less than the rated charging power of the shared battery 53, the shared distribution unit 55 receives supplementary power from the transmission line 8 and outputs that supplementary power to the shared battery 53 as well. This ensures that the shared battery 53 is charged to its rated charging power. However, if the power supplied to the shared distribution unit 55 from both the private line 10 and the shared power generator 51 exceeds the rated charging power of the shared battery 53, the shared distribution unit 55 outputs the rated charging power to the shared battery 53, and any remaining power is then returned to the transmission line 8. Furthermore, if the charge level of the shared battery 53 is full, the shared power distribution unit 55 of facility 3 will reverse-flow the surplus power received from the private line 10 to the transmission line 8 without outputting it to the shared battery 53. At this time, if the shared power generator 51 is generating power, the shared power distribution unit 55 will also reverse-flow the power generated by the shared power generator 51 to the transmission line 8. As a result, surplus electricity from the entire community is sold.

[0145] (2) When a power shortage occurs even with mutual power exchange between the power equipment 20 of each building 2 If the power demand of the electrical equipment 20 of each building 2 and each street light 4 is not met by the total power generated by the private power generators 27 of each building 2 and the total power discharged by the battery 29, that is, if the total power that can be mutually exchanged from the private line 10 to the distributions 31 of each building 2 and the street lights 4 is lower than the total power that can be mutually exchanged from the distributions 31 of each building 2 to the private line 10, the shared distribution unit 55 will output power from the shared power generator 51 and the transmission line 8 to the private line 10 in that order of priority. As a result, the loads of each building 2 will operate, the street lights 4 will light up, and power will be consumed by these loads and the street lights 4. If there is still a power shortage for the entire community, electricity will be purchased. At this time, if the charge level of the shared battery 53 is not full, the shared distribution unit 55 will output power from the shared power generator 51 and the transmission line 8 to the shared battery 53 in that order of priority. As a result, the shared battery 53 will be charged.

[0146] <<<Power distribution during power outages>>> When a power outage is detected in the transmission line 8, the shared power distribution unit 55 disconnects the transmission line 8 from the shared power distribution unit 55 and then distributes power as follows: By disconnecting the transmission line 8 from the shared power distribution unit 55, the power output from the private power generator 27, the battery 29, the shared power generator 51, and the shared battery 53 is not purchased, and this power becomes available for use only within the community.

[0147] (1) When a surplus of electricity occurs even when the power equipment 20 of each building 2 is exchanged between them. When the power demand of each building 2 and streetlights 4 is met by the total power generated by the private power generators 27 of each building 2 and the total power discharged by the battery 29, that is, when the total power that can be mutually exchanged between the private line 10 and the distribution units 31 of each building 2 is higher than the total power that can be mutually exchanged between the distribution units 31 of each building 2 and the private line 10, and there is also a surplus in power consumption by the streetlights 4, the shared distribution unit 55 of facility 3 receives the surplus power from the private line 10. In this case, when the shared power generator 51 is generating power, the shared distribution unit 55 also outputs the power generated by the shared power generator 51 to the shared battery 53. As a result, the shared battery 53 is charged.

[0148] (2) When a power shortage occurs even with mutual power exchange between the power equipment 20 of each building 2 If the power demand of each building 2 and the streetlights 4 is not met by the total power generated by the private power generators 27 and the total power discharged by the storage batteries 29 of each building 2, that is, if the total power that can be mutually exchanged from the private line 10 to the distribution batteries 31 of each building 2 and the streetlights 4 is lower than the total power that can be mutually exchanged from the distribution batteries 31 of each building 2 to the private line 10, the shared distribution battery 55 will output power from the shared power generators 51 and the shared storage batteries 53 to the private line 10 in that order of priority. As a result, the loads of each building 2 will operate, the streetlights 4 will light up, and power will be consumed by these loads and the streetlights 4.

[0149] <<Electricity meter>> The power generation meter 59 measures the amount of power generated by the shared power generation device 51 and outputs the measured value to the shared power management device 65, in particular to the calculation processing device 67. The amount of power generated measured by the power generation meter 59 may be cumulative from the start of measurement by the power generation meter 59, or it may be cumulative from the time of reset by resetting to zero at predetermined intervals (for example, every month).

[0150] <<Forward flow energy meter>> The forward power flow meter 73 measures the amount of forward power flowed from the transmission line 8 to the shared distribution unit 55 and outputs the measured value to the shared power management device 65, in particular to the calculation processing unit 67. The amount of forward power flow measured by the forward power flow meter 73 may be cumulative from the start of measurement by the forward power flow meter 73, or it may be cumulative from the time of reset by resetting to zero at predetermined intervals (for example, every month).

[0151] <<Reverse power flow energy meter>> The reverse power flow energy meter 75 measures the amount of reverse power flowed from the distribution unit 31 to the transmission line 8 and outputs the measured value to the shared power management device 65, in particular to the calculation processing unit 67. The amount of reverse power flow energy measured by the reverse power flow energy meter 75 may be cumulative from the start of measurement by the reverse power flow energy meter 75, or it may be cumulative from the time of reset by resetting to zero at predetermined intervals (for example, every month).

[0152] <<Electricity meter>> The power receiving meter 61 measures the amount of power received from the private line 10 to the shared distribution unit 55 and outputs the measured value to the shared power management device 65, in particular to the calculation processing unit 67. The amount of power generated measured by the power receiving meter 61 may be cumulative from the start of measurement by the power receiving meter 61, or it may be cumulative from the time of reset by resetting to zero at predetermined intervals (for example, every month).

[0153] <<Power supply energy meter>> The power supply meter 63 measures the amount of power supplied from the shared distribution unit 55 to the private line 10 and outputs the measured value to the shared power management device 65, in particular to the arithmetic processing unit 67. The amount of power generated measured by the power supply meter 63 may be cumulative from the start of measurement by the power supply meter 63, or it may be cumulative from the time of reset by resetting to zero at predetermined intervals (for example, every month).

[0154] <<Shared power management device>> The shared power management device 65 is a stationary or portable computer system. The shared power management device 65 is located within facility 3. The shared power management device 65 has a processing unit 67, a display unit 69, and an input unit 71.

[0155] The display unit 69 is a matrix display, a segment display, or a combination thereof. The display unit 69 displays an image according to the video signal input from the processing unit 67.

[0156] The input unit 71 has one or more input devices selected from a keyboard, pointing device, push button, and switch. When operated by an administrator or the like, the input unit 71 outputs a signal corresponding to the operation to the arithmetic processing unit 67.

[0157] The arithmetic processing unit 67 stores a program. The functions of the arithmetic processing unit 67 of this disclosure are realized by the execution of the program by the arithmetic processing unit 67.

[0158] The arithmetic processing unit 67 is connected to the internet. The arithmetic processing unit 67 communicates with the central management unit 90 via the internet. The arithmetic processing unit 67 is configured with management account information related to the administrator's account. The arithmetic processing unit 67 uses the management account information to log in to the management system operated by the central management unit 90.

[0159] The arithmetic processing unit 67 is connected to a local area network that covers the local area where the power network system 1 is built. The arithmetic processing unit 67 communicates with the arithmetic processing units 45 in each building 2 via the Internet or the local area network. The arithmetic processing unit 67 aggregates the data received from each arithmetic processing unit 45.

[0160] The arithmetic processing unit 67 is connected to the shared capacitor 53 by a signal line and manages the remaining charge or percentage of the charge in the shared capacitor 53.

[0161] The processing unit 67 manages the generated power, received power, supplied power, forward power flow, and reverse power flow measured by the generated power meter 59, the received power meter 61, the supplied power meter 63, the forward power flow power meter 73, and the reverse power flow power meter 75, respectively.

[0162] The arithmetic processing unit 67 is connected to the shared power distribution unit 55 by signal lines and manages generated power, received power, supplied power, forward power flow power, and reverse power flow power. Here, generated power refers to the power generated by the shared power generation device 51. Received power refers to the power received from the private line 10 to the shared power distribution unit 55. Supply power refers to the power supplied from the shared power distribution unit 55 to the private line 10. Forward power flow refers to the power flowed forward from the transmission line 8 to the shared power distribution unit 55. Reverse power flow refers to the power flowed backward from the shared power distribution unit 55 to the transmission line 8.

[0163] <<<Examples of management performed by the arithmetic processing unit of the shared power management device>>> The management of power, energy, remaining charge, detected values, measured values, and calculation results by the arithmetic processing unit 67 includes, for example, the following (1) to (5).

[0164] (1) Acquisition The arithmetic processing unit 67 detects the generated power, received power, and supplied power through the shared power distribution unit 55 and acquires their detected values. The arithmetic processing unit 67 also acquires measured values ​​of generated power, received power, and supplied power from the generated power meter 59, the received power meter 61, and the supplied power meter 63, respectively. The arithmetic processing unit 67 acquires measured values ​​of the remaining charge or percentage of the charge of the shared battery 53 from the shared battery 53.

[0165] (2) Aggregation The arithmetic processing unit 67 performs various calculations using at least one detected value from the generated power, received power, and supplied power, and at least one measured value from the generated power amount, received power amount, and supplied power amount. For example, the arithmetic processing unit 67 calculates the generated power amount for a predetermined period (e.g., one month) at predetermined intervals (e.g., one month). The arithmetic processing unit 67 also calculates the received power amount for a predetermined period (e.g., one month) at predetermined intervals (e.g., one month). The arithmetic processing unit 67 also calculates the supplied power amount for a predetermined period (e.g., one month) at predetermined intervals (e.g., one month). Furthermore, for example, the arithmetic processing unit 67 calculates the forward power flow amount for a predetermined period (e.g., one month) at predetermined intervals (e.g., one month), and calculates the electricity purchase amount by multiplying that forward power flow amount by the electricity purchase price. Furthermore, for example, the arithmetic processing unit 67 calculates the amount of reverse power flow for a predetermined period (for example, one month) at predetermined intervals (one month), and calculates the amount of electricity sold by multiplying that amount of reverse power flow by the electricity selling price.

[0166] (3)Memory The arithmetic processing unit 67 stores the detected and measured values ​​acquired as described in (1) above in chronological order. The arithmetic processing unit 67 also stores the calculation results as described in (2) above in chronological order.

[0167] (4)Display The arithmetic processing unit 67 displays at least one of the detected value and measured value acquired as described in (1) above on the display unit 69. The arithmetic processing unit 67 displays at least one of the calculation results as described in (2) above on the display unit 69.

[0168] (5) Send The arithmetic processing unit 67 transmits the detected and measured values ​​acquired as described in (1) above to the arithmetic processing unit 45 of each building 2 and the central control unit 90 via the Internet or local area network. The arithmetic processing unit 67 transmits the calculation results as described in (2) above to the arithmetic processing unit 45 of each building 2 and the central control unit 90 via the Internet or local area network.

[0169] <<<Example of aggregation performed by the arithmetic processing unit of the shared power management device>>> As explained in the “Example of management performed by the processing unit of the individual power management device” above, the processing unit 45 of each electrical equipment 20 transmits the detected value of self-generated power to the processing unit 67 of the shared power management device 65. The processing unit 67 receives the detected value of self-generated power transmitted by each processing unit 45 and displays the detected value of self-generated power for each building 2, electrical equipment 50, or account on the display unit 69.

[0170] Similarly, the arithmetic processing unit 67 receives detected values ​​of supplied power, supplied power, charging power, discharge power, critical load power consumption, general load power consumption, and total power consumption from each arithmetic processing unit 45, and displays the detected values ​​of supplied power, supplied power, charging power, discharge power, critical load power consumption, general load power consumption, and total power consumption for each building 2, electrical equipment 50, or account on the display unit 69. Similarly, the arithmetic processing unit 67 receives measured values ​​of generated power, supplied power, and supplied power from each arithmetic processing unit 45, and displays the measured values ​​of generated power, forward power flow power, reverse power flow power, supplied power, and supplied power for each building 2, electrical equipment 50, or account on the display unit 69. Similarly, the arithmetic processing unit 67 receives measured values ​​of remaining charge or its percentage from each arithmetic processing unit 45, and displays the measured values ​​of remaining charge or its percentage for each building 2, electrical equipment 50, or account on the display unit 69.

[0171] Therefore, while at facility 3, administrators can monitor the self-generated power, shared power, shared power, charging power, discharge power, critical load power consumption, general load power consumption, total power consumption, generated power, shared power, shared power, and remaining power received for each of the 2 buildings.

[0172] The arithmetic processing unit 67 receives calculation results from each arithmetic processing unit 45 and displays the calculation results for each building 2, electrical equipment 50, or account on the display unit 69. The calculation results include, as described above, the real-time self-consumption rate, the self-consumption rate over a period, the amount of electricity exchanged, the amount exchanged, and the points exchanged for a predetermined period, and the amount of electricity received, the amount received, and the points received for a predetermined period.

[0173] <<<The arithmetic processing unit of the shared power management system transmits a power outage notification to each electrical facility.>> When the shared power distribution unit 55 detects a power outage in the transmission line 8, the arithmetic processing unit 67 receives a signal from the shared power distribution unit 55 indicating that a power outage has been detected. The arithmetic processing unit 67 then transmits a signal indicating a power outage to the arithmetic processing unit 45 of each electrical equipment 20. Upon receiving this signal, the arithmetic processing unit 45 either disconnects the distribution unit 31 from the general electrical wiring network 21 or performs the processing described in "Limitation of Power Exchange Amount".

[0174] <Functions of the Central Control System> Next, the functions of the central control device 90 will be explained in detail. The functions of the central control device 90 described below are realized by the central control device 90 executing programs stored in it.

[0175] <<Management System Operation>> The central control unit 90 operates the management system.

[0176] <<Account Management>> The central control unit 90 manages accounts for each residential group in the management system. When the processing unit 45 of the individual power management unit 43 accesses the central control unit 90 and logs into the management system based on valid account information, the central control unit 90 permits the login to the management system.

[0177] <<Management of Private Information>> When a resident inputs private information using the input unit 49, the processing unit 45 transmits the private information to the central management unit 90, and the central management unit 90 stores the private information on the management system, linking it to an account.

[0178] <<Management of electricity and energy consumption for each building>> The central management device 90 receives detected values ​​for self-generated power, shared power, received power, charging power, discharging power, critical load power consumption, general load power consumption, and total power consumption from each processing unit 45, and stores these detected values ​​in chronological order, linked to accounts.

[0179] The central management device 90 receives measured values ​​of generated power, supplied power, and received power from each processing unit 45, and stores these measured values ​​in chronological order, linked to an account.

[0180] The central management device 90 receives measured values ​​of the remaining charge or its percentage from each processing unit 45, and stores these measured values ​​of the remaining charge or its percentage in chronological order, linked to an account.

[0181] The central management device 90 receives calculation results from each processing unit 45 and stores the calculation results in chronological order, linking them to accounts. The calculation results include real-time self-consumption rate, periodic self-consumption rate, amount of electricity exchanged, amount of electricity exchanged, and points exchanged for a predetermined period, and amount of electricity received, amount of electricity received, and points received for a predetermined period.

[0182] The central management device 90 receives the energy storage contribution, energy storage contribution amount, and energy storage contribution points from each processing unit 45, and stores the energy storage contribution, energy storage contribution amount, and energy storage contribution points in association with an account.

[0183] The central management device 90 receives detected values ​​of generated power, received power, supplied power, forward power flow power, and reverse power flow power from the arithmetic processing unit 67 of the shared power management device 65, and stores these detected values ​​in chronological order, linked to a management account.

[0184] The central management device 90 receives measured values ​​of generated power, received power, supplied power, forward power flow power, and reverse power flow power from the calculation processing unit 67 of the shared power management device 65, and stores these measured values ​​in chronological order, linked to a management account.

[0185] The central management device 90 receives measured values ​​of the remaining charge or its percentage from the calculation processing unit 67 of the shared power management device 65, and stores these measured values ​​of the remaining charge or its percentage in chronological order, linked to a management account.

[0186] The central management device 90 receives calculation results from the arithmetic processing unit 67 and stores the calculation results in chronological order, linked to a management account. The calculation results include the amount of electricity generated, the amount of electricity received, the amount of electricity supplied, the amount of forward power flow and electricity purchase amount for a predetermined period (e.g., one month), and the amount of reverse power flow and electricity sales amount for a predetermined period (e.g., one month).

[0187] <<Classification>> The central management device 90 classifies accounts based on the private information associated with each account, using common private information. For example, the central management device 90 classifies accounts based on the private information associated with each account, using common family size (instead of family size, this may be family structure, age, occupation, or lifestyle). The total number of accounts belonging to a common category through this classification is called the number of accounts by category.

[0188] <<Ranking>> The central management device 90 ranks accounts belonging to a common category based on the classification described above, with respect to total power consumption, real-time self-consumption rate, periodic self-consumption rate, amount of electricity exchanged, amount of electricity exchanged, points exchanged, energy storage contribution, energy storage contribution amount, or energy storage contribution points. The ranking of accounts in this manner is called the category rank. The category rank can be in ascending order, descending order, or both.

[0189] The central management device 90 stores the classification rank and the total number of classification accounts, associating them with each account. The central management device 90 also transmits the classification rank and the total number of classification accounts associated with each account to the processing unit 45 that logged in with that account.

[0190] The central management device 90 ranks all accounts based on total power consumption, real-time self-consumption rate, periodic self-consumption rate, amount of electricity exchanged, amount of electricity exchanged, points exchanged, energy storage contribution, energy storage contribution amount, or energy storage contribution points. The ranking of accounts in this manner is called the overall ranking. The overall ranking can be in ascending order, descending order, or both.

[0191] The central management device 90 stores the overall ranking and the total number of accounts, associating them with each account. The central management device 90 also transmits the overall ranking and the total number of accounts associated with each account to the processing unit 45 that logged in with that account.

[0192] Then, as explained in the “rank display” section above, the arithmetic processing unit 45 receives the category rank, the total number of accounts in each category, the overall rank, and the total number of accounts, and displays the category rank, the total number of accounts in each category, the overall rank, and the total number of accounts on the display unit 47.

[0193] Residents who view their total power consumption in terms of category ranking or overall ranking will be more likely to make efforts to reduce their total power consumption compared to residents of other buildings.

[0194] Residents who view their category ranking or overall ranking for real-time or time-based self-consumption rates will be more inclined to reduce their self-consumption rate than residents of other buildings.

[0195] Residents who view their ranking by category or overall ranking regarding the amount of electricity exchanged, the amount exchanged, or the points exchanged will be more inclined to increase their electricity exchange compared to residents of other buildings in Building 2.

[0196] Residents who view their ranking in terms of energy storage contribution, energy storage contribution amount, or energy storage contribution points, or their overall ranking, will be more inclined to contribute to the energy storage of the shared energy storage facility 50 than residents of other buildings 2.

[0197] In the case of category-based ranking, the private information of accounts and residents belonging to that category is shared, which increases the fairness of the ranking.

[0198] <<Status update within the same category>> The central management device 90 transmits the total power consumption, real-time self-consumption rate, periodic self-consumption rate, amount of electricity exchanged, amount of electricity exchanged, amount of electricity exchanged, amount of electricity exchanged, energy storage contribution, or energy storage contribution points, associated with all accounts belonging to a common category according to the classification described above, to each arithmetic processing unit 45 that is logged in with these accounts.

[0199] The arithmetic processing unit 45 then receives the total power consumption, real-time self-consumption rate, period-based self-consumption rate, amount of electricity exchanged, amount of electricity exchanged, amount of electricity exchanged, amount of electricity exchanged, energy storage contribution, amount of energy storage contribution, or energy storage contribution points for all accounts belonging to the common category, and displays the total power consumption, real-time self-consumption rate, period-based self-consumption rate, amount of electricity exchanged, amount of electricity exchanged, amount of electricity exchanged, amount of electricity exchanged, amount of electricity stored, amount of energy storage contribution, or energy storage contribution points for each account on the display unit 47. Such a display stimulates a competitive spirit among residents. [Explanation of Symbols]

[0200] 1. Power Network System 2 buildings 4 Streetlights 8 Power transmission lines 10 Private lines 21 General electrical wiring network 23. Important electrical wiring networks 25 Small power generator 27. Private power generation equipment 29. Energy storage 31 Distribution Unit 33. Electricity generation meter 39 Flexible power meter 41 Accommodated electricity meter 43 Individual power management device 50 Shared power storage device 51 Shared power generation equipment 53. Energy storage 53 Shared capacitor 55 Shared power distribution device 57 outlets 59. Electricity generation meter 60 Central management device 61. Electricity meter 63 Power supply energy meter 65 Shared power management device 73 Forward flow energy meter 75 Reverse power flow energy meter 90 Central management unit

Claims

1. A power network system built in a local area, Multiple electrical facilities are provided in each of the multiple buildings constructed in the aforementioned area, and are capable of mutually exchanging power through a private power line network spread throughout the area. A facility to be constructed in the aforementioned region is provided with a shared energy storage facility that receives power from the commercial grid power supply via transmission lines and is capable of exchanging and receiving power with the aforementioned electrical equipment via the aforementioned private line, The aforementioned shared energy storage facility is A shared power storage device capable of storing energy, A shared power generation system that generates electricity from renewable energy sources, A shared distribution unit receives surplus power generated through the mutual exchange of electrical equipment via the aforementioned private line, outputs that surplus power to the shared power storage unit, and also outputs the power generated by the shared power generation device to the shared power storage unit. It has, If a power shortage occurs even with the mutual exchange of electrical equipment through the private line, the shared distribution unit will output power to the private line from the shared power generator and the transmission line in the order of priority, without receiving power from the private line. A power network system characterized by the following features.

2. A power network system according to claim 1, If the charging power output from the private line and the shared power generation device to the shared power storage device via the shared distribution unit is less than the rated charging power of the shared power storage device, the shared distribution unit receives supplementary power from the transmission line and outputs that supplementary power to the shared power storage device. A power network system characterized by the following features.

3. A power network system according to claim 1, If the charge level of the shared power storage is full, the shared power distribution unit will not output the surplus power received through the private line and the power generated by the shared power generation device to the shared power storage unit, but will instead reverse-flow the surplus power and the power generated by the shared power generation device to the transmission line. A power network system characterized by the following features.

4. A power network system according to claim 1, 2, or 3, If the charge level of the shared power storage is not full, the shared power distribution unit will output power to the shared power storage unit from the shared power generation device and the transmission line in the order of priority. A power network system characterized by the following features.

5. A power network system according to any one of claims 1 to 4, Each of the aforementioned electrical equipment is, A self-generation device that generates electricity from natural energy sources, A distribution unit that distributes the aforementioned self-generated power to the aforementioned electrical equipment and the aforementioned private power lines, has A power network system characterized by the following features.

6. A power network system according to claim 5, Furthermore, equipped with a central management system, Each of the aforementioned electrical equipment is, A power exchange meter for measuring the amount of power exchanged from the distribution unit to the private line, An individual power management device that acquires the measured values ​​of the aforementioned power exchange meter, It has, Each of the individual power management devices calculates the energy storage contribution, energy storage contribution amount, or energy storage contribution points based on the amount of energy exchanged over a predetermined period measured by the energy exchange meter, and transmits the energy storage contribution, energy storage contribution amount, or energy storage contribution points to the central management device. The central management device stores the energy storage contribution, energy storage contribution amount, or energy storage contribution points received from each of the individual power management devices, linking them to the account used by each of the individual power management devices to log in to the central management device. A power network system characterized by the following features.

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