JP7442127B2 - Power management system, power management method and program - Google Patents

Description

The present disclosure generally relates to a power management system, a power management method, and a program, and more specifically relates to a power management system, a power management method, and a program that handle information on reverse flow power amount.

The power management system described in Patent Document 1 controls charging and discharging of a power storage system connected to an electric power system. The power storage system is installed at each customer together with equipment such as a solar power generation system and a fuel cell system. The power management system discharges the power storage system during a time period when a consumer consumes a large amount of power, or charges the power storage system at night when the electricity rate of the power grid is low.

JP 2019-118203 Publication

In recent years, from the perspective of environmental protection, there has been a growing trend for retail electricity companies to actively purchase electricity (amount of electricity) that is not derived from fossil energy. By the way, a consumer may be equipped with a plurality of power supply sources, such as a solar power generation system and a power storage system, as power supply sources, and a reverse power flow may occur from each of the power supply sources. At this time, it may not be possible to distinguish which power generating means generates the amount of power flowing backward from the consumer to the power grid. For example, whether the amount of reverse power flow electricity is the amount of electricity generated only by the solar power generation system or the amount of electricity generated when the amount of electricity generated by the power generation means provided in the power system is stored in the electricity storage system and then discharged. In some cases, it was not possible to distinguish whether it was included or not.

An object of the present disclosure is to provide a power management system, a power management method, and a program that can distinguish between power generation means of reverse power flow amount.

A power management system according to one aspect of the present disclosure includes an acquisition unit, a discrimination unit, and a notification unit . The acquisition unit acquires power amount information. The power amount information is information regarding the power amount at a predetermined observation point. The discrimination unit generates discrimination information based on the source of the electric energy. The distinction information enables the power generation means to be distinguished with respect to the power amount information. The notification unit notifies at least a portion of the power amount information and at least a portion of the distinction information. The power amount information includes reverse power flow power information. The reverse power flow energy information is information regarding the reverse flow power amount supplied from the confluence point to the power grid. The confluence point is a confluence point of electric power output from each of the plurality of supply sources. The plurality of supply sources include two or more supply sources having different means for obtaining electric power. The plurality of supply sources include storage batteries. The discrimination information includes reverse power flow discrimination information. The reverse power flow discrimination information allows the power generation means to be distinguished with respect to the reverse power flow energy information. The notification unit records information regarding the ratio of the amount of power charged in the storage battery for each of the power generation means and the reverse power flow distinction information in a ledger system using a blockchain.

A power management method according to one aspect of the present disclosure includes an acquisition process, a differentiation process, and a notification process . The acquisition process is a process of acquiring power amount information. The power amount information is information regarding the power amount at a predetermined observation point. The discrimination process is a process of generating discrimination information based on the source of the electric energy. The distinction information enables the power generation means to be distinguished with respect to the power amount information. The notification process is a process of notifying at least a part of the power amount information and at least a part of the distinction information. The power amount information includes reverse power flow power information. The reverse power flow energy information is information regarding the reverse flow power amount supplied from the confluence point to the power grid. The confluence point is a confluence point of electric power output from each of the plurality of supply sources. The plurality of supply sources include two or more supply sources having different means for obtaining electric power. The plurality of supply sources include storage batteries. The discrimination information includes reverse power flow discrimination information. The reverse power flow discrimination information allows the power generation means to be distinguished with respect to the reverse power flow energy information. In the notification process, information regarding the ratio of the amount of power charged in the storage battery for each of the power generation means and the reverse power flow distinction information are recorded in a ledger system using a blockchain.

A program according to one aspect of the present disclosure is a program for causing one or more processors to execute the power management method.

The present disclosure has the advantage that it is possible to distinguish between power generation means for reverse flow power.

FIG. 1 is a block diagram of customer equipment including a power management system according to an embodiment. FIG. 2 is a flowchart illustrating a power management method according to one embodiment.

Hereinafter, a power management system 1 according to an embodiment will be described using the drawings. However, the embodiment described below is only one of various embodiments of the present disclosure. The embodiments described below can be modified in various ways depending on the design, etc., as long as the objective of the present disclosure can be achieved.

(1) Overall Configuration As shown in FIG. 1, the power management system 1 of this embodiment includes an acquisition section 11 and a discrimination section 12. The acquisition unit 11 acquires power amount information. The power amount information is information regarding the power amount at a predetermined observation point. The discrimination unit 12 generates discrimination information based on the source of the electric energy. The discrimination information enables the power generation means to be distinguished regarding the power amount information. The power amount information includes reverse power flow power amount information. The reverse power flow energy information is information regarding the reverse flow power amount supplied to the power system 9 from the confluence point N1. The confluence point N1 is a confluence point of electric power output from each of the plurality of supply sources 3. The plurality of supply sources 3 include two or more supply sources 3 having different means for obtaining electric power. The discrimination information includes reverse power flow discrimination information. The reverse power flow discrimination information enables the generation means to be distinguished regarding the reverse power flow power amount information.

According to the power management system 1 of this embodiment, it is possible to distinguish between power generation means of reverse power flow amount. Therefore, for example, it is possible to distinguish between high and low values of reverse flow power amount due to differences in power generation means.

The power management system 1 is provided in, for example, consumer equipment C1. The consumer equipment C1 is, for example, a residential building such as a detached house or an apartment complex, or a non-residential property such as an office, a multi-tenant building, a factory, or a public facility. The consumer equipment C1 includes a power management system 1, a plurality of supply sources 3, and a load 4. However, at least part of the configuration of the power management system 1 may be provided outside the consumer equipment C1. In other words, at least part of the configuration of the power management system 1 may be provided on a server or equipment other than the equipment including the plurality of supply sources 3. Further, although there is one load 4 in this embodiment, the power management system 1 may include a plurality of loads 4.

The consumer equipment C1 further includes a system control circuit 2, an inverter 5, a distribution board 6, and a power measurement section 7. The plurality of supply sources 3 and loads 4 are electrically connected to a distribution board 6 via an inverter 5. The distribution board 6 is electrically connected to the power system 9. A responsibility demarcation point 8 is provided between the distribution board 6 and the power system 9. A power measurement unit 7 is arranged between the distribution board 6 and the responsibility demarcation point 8.

Each of the plurality of supply sources 3 is a power supply source. Examples of the plurality of supply sources 3 are a solar power generation system, a power storage system, and a fuel cell power generation system.

The plurality of supply sources 3 include two or more supply sources 3 having different means for obtaining electric power. When the means for obtaining electric power are divided into various classifications as follows, if the means for obtaining electric power from two or more supply sources 3 are classified into different types in at least one classification, "two or more supply sources 3" 3 have different means of obtaining electricity." The classification described below is just an example. Means for obtaining electric power can be divided into two types: power storage and power generation (power generation means). Power generation means are divided into two types: power generation derived from fossil energy and power generation derived from non-fossil energy. Power generation derived from fossil energy is divided into coal-fired power generation, oil-fired power generation, natural gas-fired power generation, etc. Power generation derived from non-fossil energy is divided into renewable energy power generation, nuclear power generation, etc. Renewable energy power generation can be divided into solar power generation, hydroelectric power generation, wind power generation, geothermal power generation, biomass power generation, etc. In addition, renewable energy power generation includes power generation by means of power generation to which FIT (Feed in Tariff) has been applied, and power generation means to which FIT has not been applied (power generation means for which FIT has been lifted due to expiration, etc.) ) and power generation. Furthermore, "storage of electricity" as a means of obtaining electric power is divided into three types: storage of electricity supplied from the power grid 9, storage of electricity derived from fossil energy, and storage of electricity derived from non-fossil energy. Storage of power supplied from the power system 9, storage of power derived from fossil energy, and storage of power derived from non-fossil energy may each be further subdivided. Further, the power generation means may be classified depending on whether or not it is fuel cell power generation. Fuel cell power generation may be categorized by hydrogen source. For example, fuel cell power generation may be classified according to whether the hydrogen source is city gas, LP gas, biomass, or water.

In addition, among the plurality of supply sources 3, in addition to the existence of combinations of two or more supply sources 3 having different means for obtaining electric power, there are also combinations of two or more supply sources 3 having the same means of obtaining electric power. You may.

In this embodiment, the plurality of (two) supply sources 3 are a solar power generation system 31 and a power storage system 32. The means for obtaining electric power for the solar power generation system 31 is power generation derived from non-fossil energy. A means for obtaining electric power for the power storage system 32 is power storage. Note that although FIG. 1 shows an example in which the solar power generation system 31 and the power storage system 32 are connected to one inverter 5, the solar power generation system 31 and the power storage system 32 each have an inverter. It's okay.

The solar power generation system 31 includes, for example, a solar cell 310 and a first power conversion section. The first power converter is, for example, a unidirectional DC-DC converter. The DC power generated by the solar cell 310 is subjected to DC-DC conversion by the first power conversion section and output to the inverter 5.

The power storage system 32 includes, for example, a storage battery 320 and a second power conversion unit. The second power converter is, for example, a bidirectional DC-DC converter. The DC power discharged from the storage battery 320 is subjected to DC-DC conversion in the second power conversion section and output to the inverter 5. Further, the DC power supplied from the inverter 5 is subjected to DC-DC conversion in the second power conversion section to charge the storage battery 320.

Inverter 5 converts AC power supplied from power system 9 via distribution board 6 into DC power, and supplies the DC power to power storage system 32 . Further, the inverter 5 converts the DC power supplied from the solar power generation system 31 and the power storage system 32 into AC power, and outputs the AC power to the distribution board 6 .

System control circuit 2 controls the operation of inverter 5. The system control circuit 2 also controls the amount of power generated by the solar cell 310, the input power amount of the power storage system 32 (storage battery 320), and the amount of power input to the power storage system 32 (storage battery 320) every predetermined period (for example, 10 seconds, 30 seconds, or 1 minute). The acquisition unit 11 is notified of the output power amount of the storage battery 320).

Electric power output from the solar power generation system 31 and the power storage system 32 can be supplied to the load 4 or the power system 9 via the inverter 5 and the distribution board 6. Further, the power output from the solar power generation system 31 can be supplied to the power storage system 32.

Power input from the power system 9 to the distribution board 6 may be supplied to the load 4. Furthermore, power input from the power system 9 to the distribution board 6 can be supplied to the power storage system 32 via the inverter 5.

Power measurement unit 7 includes a power meter. The wattmeter is, for example, a smart meter. The power measuring unit 7 measures the power flow amount (power purchase amount) which is the amount of power supplied from the power system 9 to the consumer equipment C1, and the reverse power flow which is the amount of power supplied from the consumer equipment C1 to the power system 9. Measure the amount of electricity (amount of electricity sold). The power measurement unit 7 notifies the acquisition unit 11 of the measurement results.

(2) Configuration of power management system The power management system 1 includes a computer system having one or more processors and memory. At least some of the functions of the power management system 1 are realized by the processor of the computer system executing a program recorded in the memory of the computer system. The program may be recorded in a memory, provided through a telecommunications line such as the Internet, or provided recorded on a non-temporary recording medium such as a memory card.

The power management system 1 includes an acquisition section 11, a discrimination section 12, and a notification section 13. Note that the acquiring unit 11, the distinguishing unit 12, and the notifying unit 13 indicate functions realized by the power management system 1, and do not necessarily indicate actual configurations.

The notification unit 13 notifies at least part of the power amount information and at least part of the distinction information. Notification unit 13 includes a communication interface. The communication interface sends and receives signals directly or indirectly via a network, a repeater, or the like using an appropriate communication method such as wired communication or wireless communication. The notification unit 13 transmits the power amount information and the distinction information to the external device 101, for example, through a communication interface. The external device 101 is, for example, a device owned by the administrator of the customer equipment C1 or the electric utility company. The external device 101 includes a storage device that records power amount information and distinction information. The storage device is, for example, a ROM (Read Only Memory), a RAM (Random Access Memory), or an EEPROM (Electrically Erasable Programmable Read Only Memory).

Furthermore, the notification unit 13 records the reverse power flow distinction information in the ledger system 102 by notifying (sending) the reverse power flow distinction information to the ledger system 102 . Blockchain is used as a technology to realize the ledger system 102. The same content is recorded in multiple nodes that make up the blockchain (ledger system 102). As the node, for example, at least one of the power management system 1 and other equipment provided in each of the plurality of consumer facilities C1, and a server that communicates with the power management system 1 via a network is used. Recording to the ledger system 102 (node) is performed at a predetermined time period (for example, every 10 seconds, 30 seconds, or 1 minute, which is the interval at which power amount information is updated). Note that the notification unit 13 may record at least part of the information other than the reverse power flow discrimination information in the ledger system 102 among the discrimination information. Further, the notification unit 13 may record at least a portion of the power amount information in the ledger system 102.

The acquisition unit 11 acquires power amount information that is information regarding the power amount at a predetermined observation point. The power amount information includes reverse power flow power amount information. The reverse power flow energy information is information regarding the reverse flow power amount supplied to the power system 9 from the confluence point N1. The observation point corresponding to the reverse power flow energy information is between the confluence point N1 and the power system 9. The confluence point N1 is a confluence point of electric power output from each of the plurality of supply sources 3. That is, the connection point between the plurality of supply sources 3 provided between the plurality of supply sources 3 and the power system 9 corresponds to the confluence point N1. In FIG. 1, the flow of reverse power flow energy is illustrated by arrow A1. The acquisition unit 11 of this embodiment acquires the measured value of the reverse power flow amount measured by the power measurement unit 7 as reverse power flow energy information.

Further, the power amount information includes power flow power amount information. The tidal power amount information is information regarding the tidal power amount supplied from the power system 9 to the confluence point N1. The observation point corresponding to the tidal power amount information is between the confluence point N1 and the power system 9. In FIG. 1, the flow of the tidal power amount is illustrated by arrow A2. The acquisition unit 11 of this embodiment acquires the measured value of the power flow energy measured by the power measurement unit 7 as power flow energy information.

Further, the power amount information includes output power amount information. The output power amount information is information regarding the output power amount of each of the plurality of supply sources 3 (solar power generation system 31 and power storage system 32). The observation point corresponding to the output power amount information is, for example, the output terminal of each of the plurality of supply sources 3. In FIG. 1, the flow of the output power amount of the solar power generation system 31 is illustrated by arrow A3, and the flow of the output power amount of the power storage system 32 is illustrated by arrow A4. The acquisition unit 11 of this embodiment acquires the notification from the system control circuit 2 as output power amount information. That is, the information on the power generation amount of the solar power generation system 31 notified from the system control circuit 2 is the output power amount information regarding the solar power generation system 31. The information on the output power amount of the power storage system 32 notified from the system control circuit 2 is the output power amount information regarding the power storage system 32 .

Further, the power amount information includes input power amount information. The input power amount information is information regarding the input power amount of the power storage system 32. The observation point corresponding to the input power amount information is, for example, an input terminal of the power storage system 32. In FIG. 1, the flow of the input power amount of the power storage system 32 is illustrated by an arrow A5. The acquisition unit 11 of this embodiment acquires the notification from the system control circuit 2 as input power amount information. That is, the information about the input power amount to the power storage system 32 notified from the system control circuit 2 is input power amount information.

The discrimination unit 12 generates discrimination information regarding the electric energy at each of the plurality of observation points of the consumer equipment C1 based on the source of the electric energy. Examples of sources of electric energy are the solar power generation system 31, the power storage system 32, and the power grid 9. In other words, equipment that can supply electricity to observation points can be the source of electricity.

The discrimination information enables the power generation means of the electric energy to be distinguished regarding the electric energy information. The discrimination information includes information as to whether the electric energy is derived from fossil energy. In other words, the distinction information includes information as to whether the amount of electric power was generated by a power generation means using fossil energy. Fossil energy power generation means include coal-fired power generation, oil-fired power generation, and natural gas-fired power generation. In this embodiment, at least part of the distinction information includes information on whether or not the amount of electricity is derived from fossil energy, as well as information on the ratio of the amount of electricity derived from fossil energy and the amount of electricity derived from non-fossil energy. including. Specifically, the reverse power flow discrimination information, the input discrimination information and the output discrimination information of the power storage system 32, which will be described later, include information regarding the ratio between the amount of power derived from fossil energy and the amount of power derived from non-fossil energy.

The distinction information allows power generation means to be distinguished for each time period with respect to the power amount information. Each time period is, for example, every minute, every 30 minutes, or every hour. Here, the distinction information allows the power generation means to be distinguished in terms of hourly power amount information. That is, the distinction information includes information indicating whether the amount of power is derived from fossil energy or not, corresponding to the hourly power amount information. For example, the distinction information includes information indicating whether the amount of electricity from 0:00 to 1:00 on a certain day is derived from fossil energy, and information indicating whether the amount of electricity from 1:00 to 2:00 on a certain day is derived from fossil energy. and information indicating. The discrimination unit 12 generates discrimination information every day, and the discrimination information from the previous day remains without being overwritten by new discrimination information. However, the discrimination information that has been recorded for a predetermined retention period may be overwritten with new discrimination information.

The discrimination information includes reverse power flow discrimination information. The reverse power flow discrimination information enables the generation means to be distinguished regarding the reverse power flow power amount information. That is, the reverse power flow discrimination information includes information indicating whether the reverse power flow power amount is derived from fossil energy. The process by which the discrimination unit 12 generates the reverse power flow discrimination information will be described later.

Further, the discrimination information includes tidal flow discrimination information. The power flow discrimination information enables the power generation means to be distinguished regarding the power flow energy information. That is, the power flow discrimination information includes information indicating whether the power flow amount is derived from fossil energy. By the way, the source of the tidal power amount is the power system 9, and the power amount supplied from the power system 9 in this embodiment includes the power amount derived from fossil energy. Therefore, in this embodiment, in order to simplify the handling of the tidal power amount, the power flow distinction information is predetermined and is information indicating that the tidal power amount is derived from fossil energy. In other words, the entire amount of tidal power is considered to be derived from fossil energy.

Further, the discrimination information includes output discrimination information. The output discrimination information enables the power generation means to be distinguished regarding the output power amount information. That is, the output distinction information includes information indicating whether the output power amount of each of the plurality of supply sources 3 is derived from fossil energy. The source of the output power amount of the solar power generation system 31 is the solar power generation system 31. In this embodiment, the output distinction information corresponding to the output power amount of the solar power generation system 31 is determined in advance, and is information indicating that the output power amount is derived from non-fossil energy. The source of the output power amount of the power storage system 32 is the power storage system 32. A process in which the discrimination unit 12 generates output discrimination information corresponding to the output power amount of the power storage system 32 will be described later.

The discrimination information includes input discrimination information. The input discrimination information allows the power generation means to be distinguished regarding the input power amount information of the power storage system 32. That is, the input distinction information includes information indicating whether the input power amount of the power storage system 32 is derived from fossil energy. Furthermore, the input distinction information includes information regarding the ratio of the amount of power derived from fossil energy to the amount of power derived from non-fossil energy (hereinafter referred to as "fossil/non-fossil ratio") among the amount of input power to the power storage system 32. .

In the following, the amount of power derived from fossil energy may be abbreviated as "fossil power amount" and the amount of power derived from non-fossil energy may be abbreviated as "non-fossil power amount."

The discrimination unit 12 refers to output discrimination information corresponding to each supply source 3 to discriminate whether or not the output power amount of each supply source 3 is a fossil power amount. Further, the discriminating unit 12 distinguishes whether the tidal flow power amount supplied from the power system 9 is the fossil power amount or not by referring to the power flow distinction information. Then, the discriminating unit 12 determines the ratio between the fossil electric energy and the non-fossil electric energy with respect to the input electric energy of the power storage system 32, and sets the determined ratio as the fossil/non-fossil ratio as the input discrimination information. In the present embodiment, the distinguishing unit 12 sets the ratio between the tidal power amount (fossil power amount) and the output power amount (non-fossil power amount) of the solar power generation system 31 as the fossil/non-fossil power ratio. In other words, since the source of the input power amount of the power storage system 32 is at least one of the power system 9 and the solar power generation system 31, the distinguishing unit 12 distinguishes between the tidal power amount from the power system 9 and the output power of the solar power generation system 31. Generate input distinguishing information based on the amount.

If the power storage system 32 is charging during a period when the tidal power amount is 0 [kWh], it can be determined that the power storage system 32 is being charged by the output power amount of the solar power generation system 31. Therefore, the discrimination unit 12 sets the fossil/non-fossil ratio as input discrimination information to 0:1 (that is, the non-fossil electric energy accounts for 100%).

Further, if the power storage system 32 is charging during a period when the output power amount of the solar power generation system 31 is 0 [kWh], it can be determined that the power storage system 32 is being charged by the power amount of the power grid 9. Therefore, the discrimination unit 12 sets the fossil/non-fossil ratio as input discrimination information to 1:0 (that is, the fossil electric energy accounts for 100%).

In addition, during the period when both the tidal power amount and the output power amount of the solar power generation system 31 are positive values, the discrimination unit 12 calculates the ratio of the tidal power amount and the output power amount of the solar power generation system 31, The obtained ratio is used as the fossil/non-fossil ratio as input discrimination information.

The distinguishing unit 12 calculates the fossil power amount and the non-fossil power amount among the remaining capacity of the storage battery 320 based on the input power amount information and the input discrimination information of the power storage system 32. Furthermore, the discrimination unit 12 calculates the fossil/non-fossil ratio of the remaining capacity of the storage battery 320 based on the calculated fossil power amount and non-fossil power amount.

That is, the distinguishing unit 12 calculates the storage battery 320 by time-integrating the product of the input electric energy and the proportion of fossil electric energy included in the input electric energy, starting from the point in time when the remaining capacity of the storage battery 320 is 0 [kWh]. Calculate the amount of fossil electricity stored in (unit: [kWh]). Furthermore, the distinguishing unit 12 integrates the product of the input electric energy and the ratio of non-fossil electric energy included in the input electric energy over time from the time when the remaining capacity of the storage battery 320 is 0 [kWh]. Calculate the amount of stored non-fossil electric power (unit: [kWh]).

Further, when the storage battery 320 discharges, the discrimination unit 12 considers that the fossil power amount and the non-fossil power amount of the storage battery 320 are outputted at the fossil/non-fossil ratio of the remaining capacity, for example. For example, when the fossil/non-fossil ratio of remaining capacity is 1:3 and the storage battery 320 is discharged by 4 [kWh], the discrimination unit 12 calculates the calculated value of the fossil power amount of the storage battery 320, The value is updated to the value obtained by subtracting 1 [kWh] from the value at the time before discharging. Further, the discrimination unit 12 updates the calculated value of the non-fossil electric energy of the storage battery 320 to a value obtained by subtracting 3 [kWh] from the value at the time before the storage battery 320 is discharged.

Further, the discrimination unit 12 calculates the fossil/non-fossil ratio of the remaining capacity of the storage battery 320 as described above, and uses the calculated value as output discrimination information corresponding to the output power amount of the power storage system 32.

Furthermore, the discrimination unit 12 generates reverse power flow discrimination information as follows. That is, the discrimination unit 12 generates reverse power flow discrimination information based on the output power amount information and output discrimination information of each supply source 3 and the input power amount information and input discrimination information of the power storage system 32. More specifically, the discrimination unit 12 generates output discrimination information of the power storage system 32 as described above based on the input power amount information and the input discrimination information of the power storage system 32. The discrimination unit 12 generates reverse power flow discrimination information based on this output discrimination information, the output discrimination information of the solar power generation system 31, and the output power amount information of each of the solar power generation system 31 and the power storage system 32. do. That is, since the source of the reverse power flow energy is at least one of the solar power generation system 31 and the power storage system 32, the discrimination unit 12 generates reverse power flow discrimination information based on the output power amount information.

More specifically, the distinguishing unit 12 calculates the sum (first value) of the fossil electric energy included in the output electric energy of each of the plurality of supply sources 3 and the sum (first value) of the fossil electric energy included in the output electric energy of each of the plurality of supply sources 3. The sum of the non-fossil electric energy (second value) is calculated. That is, the discrimination unit 12 calculates the product of the output power amount of the power storage system 32 and the proportion of the fossil power amount included in the output power amount as the sum (first value) of the fossil power amount. Further, the distinguishing unit 12 calculates a value obtained by adding the product of the output power amount of the power storage system 32 and the proportion of non-fossil power amount included in the output power amount to the output power amount of the solar power generation system 31, and calculates the The obtained value is defined as the sum of non-fossil electric energy (second value). The discrimination unit 12 calculates the ratio between the calculated sum of fossil electric energy (first value) and the calculated sum of non-fossil electric energy (second value) as the fossil/non-fossil ratio of reverse power flow electric energy. The reverse power flow discrimination information includes information on the fossil/non-fossil ratio of reverse power flow energy calculated by the discrimination unit 12.

(3) Advantages of using a power management system The purchase price of non-fossil electric power may be higher than that of fossil electric power. The consumer equipment C1 of this embodiment includes a supply source 3 (power storage system 32) that may output fossil electric power and a supply source 3 (solar power generation system 31) that outputs non-fossil electric power. However, the output power amounts of the respective supply sources 3 join together at a junction point N1. Here, by referring to the reverse power flow power amount information and the reverse power flow distinction information, the fossil/non-fossil ratio of the reverse power flow power amount becomes clear. Therefore, it becomes possible to buy and sell the reverse power flow amount at a purchase price according to the fossil/non-fossil ratio. In other words, it becomes possible to buy and sell the amount of reverse power flow electricity at a purchase price depending on the power generation means. Thereby, the owner of the consumer equipment C1 may be able to obtain more compensation for the amount of reverse power flow.

Further, the distinction regarding the power generation means indicated by the distinction information such as the reverse power flow distinction information may be a distinction as to whether the amount of electric power is derived from renewable energy or not. When the amount of electric power is derived from renewable energy, the distinction regarding the power generation means may be a distinction as to whether the power generation means is derived from a power generation means to which FIT has been applied. That is, the distinction information may include information for distinguishing these. Further, the distinction information may include information on the ratio of the amount of electric power that is derived from renewable energy and is derived from a power generation means to which FIT is not applied, among the amount of electric power. The amount of power derived from renewable energy and not subject to FIT may have a different purchase price from the amount of power derived from other power generation means. Therefore, by referring to the reverse power flow discrimination information, it becomes possible to buy and sell the reverse power flow power amount at a purchase price according to the power generation means.

The distinction regarding the power generation means indicated by the distinction information such as the reverse power flow distinction information is not limited to the above-mentioned distinction. The distinction regarding power generation means may be a distinction between individual power generation means. In short, the distinction regarding the power generation means may be, for example, whether the power generation means is coal-fired power generation, oil-fired power generation, natural gas-fired power generation, fuel cell power generation, solar power generation, hydroelectric power generation, etc. .

By using the power management system 1, the amount of reverse power flow can be distinguished by the power generation means, regardless of the configuration of the consumer equipment C1. For example, as in the present embodiment, even if the configuration of the consumer equipment C1 is such that the power generation equipment such as the solar power generation system 31 and the discharge of the power storage system 32 can be performed simultaneously, The amount of reverse flow power can be distinguished by the power generation means.

(4) Control of the power storage system The power management system 1 is used together with the system control circuit 2 that controls charging and discharging of the power storage system 32. Further, the system control circuit 2 may be one component of the power management system 1. The functions of the system control circuit 2 will be explained below.

The system control circuit 2 acquires power generation amount prediction information that predicts the amount of power generated by the solar power generation system 31. The power generation amount prediction information is obtained by the system control circuit 2 or the like based on, for example, a weather forecast. The system control circuit 2 also receives input of control commands issued from electric utilities and the like. The control command is a command regarding supply and demand adjustment of the power system 9. Here, as an example, a case will be described in which the control command is a load suppression command that instructs to suppress the amount of power purchased from the power system 9 at a predetermined time.

The control command is issued, for example, by the day before the day on which the electric power and/or the amount of electric power is to be suppressed. The control command includes control reward information. The control reward is a reward obtained by the owner of the customer equipment C1 when the customer equipment C1 suppresses the electric power and/or the amount of power supplied from the power system 9 during a certain time period. Here, a case will be described in which the system control circuit 2 suppresses electric power and/or electric energy according to a control command. That is, the system control circuit 2 charges the power storage system 32 before the period (hereinafter referred to as the "command period") in which the power and/or the amount of power is to be suppressed, and discharges the power to the power storage system 32 during the command period. let

System control circuit 2 controls power storage system 32 based on power generation prediction information and control commands. As an example, the system control circuit 2 controls the power storage system 32 according to [Table 1] below.

In [Table 1], the "current day" may be any day, and the "previous day" refers to the day before the "current day". If the predicted power generation amount of the solar power generation system 31 is below a predetermined threshold, it corresponds to "no power generation" in [Table 1], and if it exceeds the above threshold, it corresponds to "power generation" in [Table 1]. Applicable.

The control remuneration unit price is a remuneration per 1 [kWh] or per 1 [kW] obtained when the amount of electricity purchased is suppressed during the command period. The basic concept of controlling the power storage system 32 is as follows. That is, when the control remuneration unit price is relatively high, the amount of power supplied from the power grid 9 is stored in the power storage system 32 and discharged during the command period. Thereby, even when the solar power generation system 31 does not generate electricity, it is possible to reliably charge the battery and respond to the command. On the other hand, if the unit price of control remuneration is relatively low, more remuneration may be obtained by selling the output power amount of the solar power generation system 31. Therefore, instead of the amount of power supplied from the power grid 9, the output power amount (non-fossil power amount) of the solar power generation system 31 is stored in the power storage system 32 and discharged during the command period. In the control shown in [Table 1], power generation by the solar power generation system 31 and discharge of the power storage system 32 may be performed simultaneously. Nevertheless, by referring to the reverse power flow discrimination information generated by the distinguishing unit 12, it is possible to distinguish the power generation means of the reverse power flow amount (for example, whether it is derived from fossil energy or not).

Unless otherwise specified in the following explanation regarding [Table 1], when the power storage system 32 starts discharging, the power storage system 32 continues discharging until the remaining capacity of the storage battery 320 becomes 0 [kWh], for example. do. Further, the system control circuit 2 performs the following control as common control in all cases in [Table 1]. In other words, when a control command corresponding to "that day" has been issued (hereinafter referred to as "control command issued"), the system control circuit 2 controls the power system 9 from the consumer equipment C1 during discharging of the power storage system 32. Allow reverse flow to at least the command period. Note that during a period other than the command period, reverse power flow from the consumer equipment C1 to the power grid 9 while the power storage system 32 is discharging may be prohibited or permitted.

In the case of "no power generation", the power storage system 32 is charged with the amount of power supplied from the power grid 9 from late at night (for example, 11:00 p.m.) on the "previous day" until morning (for example, 6:00 a.m.) on the "day". If a control command corresponding to "that day" has not been issued (hereinafter referred to as "no control command"), from morning (for example, 6 o'clock) to midnight (for example, 23:00) of "that day", Discharging of the power storage system 32 is permitted. On the other hand, in the case of "with control command", the discharge of the power storage system 32 is restricted (for example, prohibiting discharge or reducing the amount of discharge to a predetermined value or less) before the command period of "that day", and after midnight from the command period (for example, until 23:00), the power storage system 32 is allowed to discharge.

In the case of "power generation" and "no control command", the power storage system 32 is charged with the output power of the solar power generation system 31 during the day (for example, from 8:00 to 18:00) of the "same day". Then, the power storage system 32 is allowed to discharge from the morning (for example, 6 o'clock) to midnight (for example, 23 o'clock) on the "day". However, if it is more economical to charge the battery using the amount of electricity supplied from the power system 9 from late night on the "previous day" to morning on the "same day," charging is performed from late night on the "previous day" to morning on the "same day."

If there is "power generation" and the morning period (for example, 6:00 to 8:00) of the "day" is scheduled as the command period, the control will be changed depending on whether the control reward unit price exceeds the threshold value. . If the control remuneration unit price is less than the threshold value, the power storage system 32 is charged with the output power of the solar power generation system 31 during the daytime of the "previous day" (for example, from 8:00 to 18:00). On the other hand, if the control remuneration unit price exceeds the threshold, depending on the amount of electricity supplied from the power system 9 from the midnight of the "previous day" (for example, 11:00 p.m.) to the morning of the "day" (for example, 6:00 a.m.) Charge the power storage system 32. Thereby, even when the solar power generation system 31 does not generate power, it is possible to reliably charge the solar power generation system 31 and respond to the command. Regardless of whether the control remuneration unit price exceeds the threshold or is below the threshold, discharging of the power storage system 32 is restricted before the command period, and discharge of the power storage system 32 is permitted from the command period until midnight (for example, 11:00 p.m.).

If there is "power generation" and the command period is scheduled to be during the day (for example, from 8:00 to 18:00) on the "same day", the control will be changed depending on whether the control reward unit price exceeds the threshold value. . If the control remuneration unit price is below the threshold, the output power amount of the solar power generation system 31 will be calculated during the daytime of the "previous day" (for example, from 8:00 to 18:00) and during the daytime of the "same day" (up to the command period). The power storage system 32 is charged by this. On the other hand, if the control remuneration unit price exceeds the threshold, depending on the amount of electricity supplied from the power system 9 from the midnight of the "previous day" (for example, 11:00 p.m.) to the morning of the "day" (for example, 6:00 a.m.) Charge the power storage system 32. Furthermore, the power storage system 32 is charged by the output power amount of the solar power generation system 31 during the day of the "same day" (until the command period). Regardless of whether the control remuneration unit price exceeds the threshold or is below the threshold, discharging of the power storage system 32 is restricted before the command period, and discharge of the power storage system 32 is permitted from the command period until midnight (for example, 11:00 p.m.).

If there is "power generation" and the command period is scheduled for the night of the "day" (for example, from 18:00 to 23:00), then during the daytime (for example, from 8:00 to 18:00) of the "day" The power storage system 32 is charged by the output power of the photovoltaic system 31. More specifically, discharging of the power storage system 32 is permitted from morning (for example, 6 o'clock) to midnight (for example, 23 o'clock), and the discharge of the storage battery 320 is allowed at a predetermined time (for example, 18 o'clock) before the command period. The power storage system 32 is charged with the output power amount of the solar power generation system 31 so that the remaining capacity becomes a predetermined amount or more.

(Modification 1)
The power management system 1 according to Modification 1 will be described below. Components similar to those in the embodiment will be given the same reference numerals and descriptions will be omitted.

Discrimination unit 12 determines whether the output power amount of power storage system 32 includes fossil power amount. When determining that the output power amount of the power storage system 32 includes the fossil power amount, the discrimination unit 12 regards the output power amount of the power storage system 32 as the fossil power amount. In other words, the entire amount of output power of the power storage system 32 is regarded as the fossil power amount. At this time, the distinguishing unit 12 generates information indicating that the output power amount is the fossil power amount as the output distinguishing information of the power storage system 32.

More specifically, the distinguishing unit 12 refers to the fossil/non-fossil ratio of the remaining capacity of the storage battery 320, and if the remaining capacity includes fossil electric energy, the discrimination unit 12 determines the output as output discrimination information of the electricity storage system 32. Generates information that the electric energy is fossil electric energy. On the other hand, when the remaining capacity does not include fossilized power, the discrimination unit 12 generates information indicating that the output power is non-fossil power as output discrimination information of the power storage system 32.

According to the present modification 1, the process related to the output power amount of the power storage system 32 can be simplified compared to the embodiment.

(Modification 2)
The power management system 1 according to Modification 2 will be described below. Components similar to those in the embodiment will be given the same reference numerals and descriptions will be omitted.

This second modification is a further modification of the first modification. The discrimination unit 12 determines whether the reverse power flow amount includes fossil power amount. When determining that the reverse power flow amount includes the fossil power amount, the discrimination unit 12 considers the reverse power flow power amount to be the fossil power amount. In other words, the entire amount of reverse flow power is regarded as fossil power. At this time, the distinguishing unit 12 generates information indicating that the reverse power flow amount is the fossil power amount as the reverse power flow distinguishing information.

More specifically, the distinguishing unit 12 refers to the output power amount information and output distinction information of each supply source 3, and when the reverse power flow power amount includes fossil power energy, as the reverse power flow distinguishing information, Information indicating that the reverse flow power amount is the fossil power amount is generated. On the other hand, if the reverse power flow power amount does not include fossil power energy, the discrimination unit 12 generates information indicating that the reverse power flow power amount is non-fossil power energy as reverse power flow discrimination information.

According to the second modification, the process related to the reverse power flow amount can be simplified compared to the embodiment and the first modification.

(Modification 3)
The power management system 1 according to modification 3 will be described below. Components similar to those in the embodiment will be given the same reference numerals and descriptions will be omitted.

This third modification is a further modification of the second modification. The power management system 1 determines the point in time when the state of reverse power flow energy switches between a first state in which fossil power is included and a second state in which fossil power is not included, as an integration period for reverse power flow energy. be the end point of For example, assume that the state of the reverse flow power amount is in the first state from 0:00 to 0:20, and in the second state after 0:20. The power management system 1 includes reverse power flow energy information whose integration period is from 0:00 to 0:20, and reverse power flow distinction information corresponding to this reverse power flow energy information (i.e., if the reverse power flow energy is (information that the amount of electricity is the amount of electricity). Furthermore, the power management system 1 stores reverse power flow energy information with 0:20 as the starting point of the integration period, and reverse power flow distinction information corresponding to this reverse power flow energy information (that is, reverse power flow energy is non-fossil power information that it is a quantity) and generate.

According to the third modification, compared to the second modification, the fossil power amount and the non-fossil power amount included in the reverse flow power amount can be determined more accurately.

(Modification 4)
The power management system 1 according to modification 4 will be described below. Components similar to those in the embodiment will be given the same reference numerals and descriptions will be omitted.

In this modification 4, the output distinction information corresponding to the output power amount of the power storage system 32 is determined in advance according to the specifications of the consumer equipment C1. As an example, when the power storage system 32 is configured to be able to be charged by power supplied from the power grid 9, the output distinction information corresponding to the output power amount of the power storage system 32 indicates that the output power amount is a fossil power amount. This information is determined in advance.

As another example, if the power storage system 32 is configured to be able to be charged only with the power supplied from the solar power generation system 31, the output distinction information corresponding to the output power amount of the power storage system 32 may be Information indicating that the amount of electricity is non-fossil electricity is determined in advance.

According to the fourth modification, the process related to the output power amount of the power storage system 32 can be simplified compared to the embodiment.

(Other variations of the embodiment)
Other modifications of the embodiment will be listed below. The following modified examples may be realized by appropriately combining them. Further, the following modified examples may be realized by appropriately combining each of the above-mentioned modified examples.

Functions similar to those of the power management system 1 may be realized by a power management method, a (computer) program, a non-temporary recording medium on which the program is recorded, or the like.

As shown in FIG. 2, the power management method according to one embodiment includes an acquisition process and a discrimination process. The acquisition process is a process of acquiring power amount information, which is information regarding the power amount at a predetermined observation point. The discrimination process is a process of generating discrimination information based on the source of the electric energy. The discrimination information enables the power generation means to be distinguished regarding the power amount information. The power amount information includes reverse power flow power amount information. The reverse power flow energy information is information regarding the reverse flow power amount supplied to the power system 9 from the confluence point N1. The confluence point N1 is a confluence point of electric power output from each of the plurality of supply sources 3. The plurality of supply sources 3 include two or more supply sources 3 having different means for obtaining electric power. The discrimination information includes reverse power flow discrimination information. The reverse power flow discrimination information enables the generation means to be distinguished regarding the reverse power flow power amount information.

More specifically, in the acquisition process, the acquisition unit 11 acquires power amount information from the power measurement unit 7 and the system control circuit 2 (step ST1). That is, the acquisition unit 11 acquires the measured values of the reverse flow power amount and the power flow power amount measured by the power measurement unit 7 as the reverse flow power amount information and the power flow power information. Furthermore, the acquisition unit 11 acquires notifications from the system control circuit 2 as input power amount information and output power amount information.

In the discrimination process, the discrimination unit 12 generates discrimination information. More specifically, the discrimination unit 12 generates reverse power flow discrimination information (steps ST2 and ST3). The reverse power flow discrimination information includes information on the fossil/non-fossil ratio of reverse power flow energy. That is, the discrimination unit 12 calculates the sum (first value) of the fossil electric energy included in the output electric energy of each of the plurality of supply sources 3 (step ST2). Further, the distinguishing unit 12 calculates the sum (second value) of the non-fossil electric energy included in the output electric energy of each of the plurality of supply sources 3 (step ST2). Further, the discriminating unit 12 calculates the ratio of the sum of fossil electric energies (first value) to the sum of non-fossil electric energies (second value) as a fossil/non-fossil ratio (step ST3).

Moreover, the power management method further includes notification processing. In the notification process, the notification unit 13 notifies at least part of the power amount information and at least part of the distinction information. For example, the notification unit 13 notifies (records) the reverse power flow discrimination information generated in the discrimination process to the ledger system 102 (step ST4).

A program according to one aspect is a program for causing one or more processors to execute the above power management method.

Power management system 1 in the present disclosure includes a computer system. A computer system mainly consists of a processor and a memory as hardware. The functions of the power management system 1 in the present disclosure are realized by a processor executing a program recorded in the memory of the computer system. The program may be pre-recorded in the memory of the computer system, may be provided through a telecommunications line, or may be recorded on a non-transitory storage medium readable by the computer system, such as a memory card, optical disc, hard disk drive, etc. may be provided. A processor in a computer system is comprised of one or more electronic circuits including semiconductor integrated circuits (ICs) or large scale integrated circuits (LSIs). The integrated circuits such as IC or LSI referred to herein have different names depending on the degree of integration, and include integrated circuits called system LSI, VLSI (Very Large Scale Integration), or ULSI (Ultra Large Scale Integration). Furthermore, an FPGA (Field-Programmable Gate Array), which is programmed after the LSI is manufactured, or a logic device that can reconfigure the connections inside the LSI or reconfigure the circuit sections inside the LSI, may also be used as a processor. I can do it. The plurality of electronic circuits may be integrated into one chip, or may be provided in a distributed manner over a plurality of chips. A plurality of chips may be integrated into one device, or may be distributed and provided in a plurality of devices. The computer system herein includes a microcontroller having one or more processors and one or more memories. Therefore, the microcontroller is also composed of one or more electronic circuits including semiconductor integrated circuits or large-scale integrated circuits.

Furthermore, it is not an essential configuration for the power management system 1 that multiple functions of the power management system 1 are concentrated in one chassis, and the components of the power management system 1 are distributed among multiple chassis. may be provided. Furthermore, at least some of the functions of the power management system 1, for example, some of the functions of the distinguishing unit 12, may be realized by a cloud (cloud computing) or the like.

On the other hand, in the embodiment, at least some functions of the power management system 1 and the like that are distributed across multiple devices may be integrated into one housing. For example, functions distributed between the power management system 1 and the external device 101 may be integrated into one housing.

The plurality of supply sources 3 are not limited to the solar power generation system 31 and the power storage system 32. Further, when using a supply source 3 other than these, the output distinction information may be determined according to the type of the supply source 3. When power generation equipment derived from fossil energy (coal-fired power generation equipment, oil-fired power generation equipment, natural gas-fired power generation equipment, etc.) is used as supply source 3, the output distinction information is, for example, if the output power is derived from fossil energy. It may be information indicating that there is. When using power generation equipment derived from non-fossil energy (renewable energy power generation equipment, etc.) as the supply source 3, the output distinction information may be, for example, information indicating that the output power amount is derived from non-fossil energy. .

The tidal power amount information and the output power amount information may be information indicating a value obtained by subtracting the power consumption amount of the load 4 from the actual tidal power amount and output power amount. Further, the tidal power amount information and the output power amount information may be information indicating a value obtained by subtracting a value obtained by multiplying the power consumption of the load 4 by a predetermined coefficient from the actual tidal power amount and output power amount. .

The power management system 1 may include a storage device that records at least part of the power amount information and at least part of the distinction information. The notification unit 13 notifies (outputs) at least part of the power amount information and at least part of the distinction information to the storage device.

The distinction information may include information on predetermined evaluation points. The distinguishing unit 12 may generate evaluation point information such that, for example, the amount of electric power produced by a power generation means with a smaller load on the environment is associated with a higher evaluation point.

At least a portion of the input discrimination information of the power storage system 32 and the output discrimination information of each supply source 3 may be predetermined information. For example, when the power generation means of the supply source 3 is renewable energy power generation, information as to whether the output power amount is derived from a power generation means to which FIT is applied may be determined in advance as output distinction information. . Further, for example, when the power generation means of the supply source 3 is fuel cell power generation, information on the hydrogen source of the fuel cell power generation may be predetermined as output distinction information. Further, the power management system 1 may include a setting unit for setting input distinction information and output distinction information. The setting unit is used in conjunction with an authentication system or the like that authenticates the administrator, and allows only the administrator to set input distinguishing information and output distinguishing information. Further, the power flow distinction information may include information indicating the fossil/non-fossil ratio of the amount of power supplied from the power system 9. The information indicating the fossil/non-fossil ratio of the amount of power supplied from the power system 9 may be information set by a setting unit.

The observation point of the power amount as reverse power flow power amount information and power flow power amount information (that is, the installation position of the power measurement unit 7) is not limited to between the distribution board 6 and the power system 9, but is between the confluence point N1 and It suffices if it is between the power system 9 and the electric power system 9. For example, the observation point may be between the distribution board 6 and the inverter 5, or between the inverter 5 and the confluence N1. Further, the observation point may be provided on the distribution board 6 or the inverter 5.

A confluence point N1 may be provided between the plurality of consumer facilities C1 and the power system 9. The plurality of consumer facilities C1 are configured such that the amount of power output from each supply source 3 of the plurality of consumer facilities C1 is combined at a confluence point N1 and then flows backward into the power grid 9. It's okay. That is, the plurality of supply sources 3 may be distributed and arranged in the plurality of customer facilities C1.

The consumer equipment C1 may include a plurality of merging points N1. In this case, the power management system 1 acquires, for each confluence point N1, reverse power flow energy information that is information regarding the reverse power flow energy supplied from the confluence point N1 to the power system 9, and converts the reverse power flow energy information into Corresponding reverse power flow discrimination information may be generated.

If the plurality of supply sources 3 do not include the power storage system 32, the discrimination unit 12 may generate reverse power flow discrimination information without using the input power amount information and the input discrimination information. That is, the discrimination unit 12 may generate reverse power flow discrimination information based on the output power amount information and the output discrimination information.

Power storage system 32 may include a plurality of storage batteries 320. Further, some of the storage batteries 320 among the plurality of storage batteries 320 are charged with non-fossil electric power outputted from the solar power generation system 31 etc., and some other storage batteries 320 are charged with the amount of non-fossil electric power outputted from the electric power system 9 etc. The battery may be charged using electric energy including fossil electric energy. For example, the discrimination unit 12 uses information indicating that the output power amount from the former storage battery 320 is non-fossil power amount as the output discrimination information. For example, the discrimination unit 12 uses information indicating that the output power amount from the latter storage battery 320 is fossil power amount as the output discrimination information. Note that the plurality of storage batteries 320 may be used properly from another viewpoint. For example, some of the storage batteries 320 among the plurality of storage batteries 320 are charged with electric energy derived from a power generation means to which FIT is applied, and another part of storage batteries 320 are charged by electric power derived from a power generation means to which FIT is not applied. may be charged with the amount of electricity.

Storage battery 320 may be included in an electric vehicle. Further, the electric vehicle may record the amount of electric power charged each time the storage battery 320 is charged. Furthermore, when the storage battery 320 is charged using charging equipment that has received predetermined authentication, the electric vehicle may receive predetermined information from the charging equipment and record the received information. The above information is information that proves that the storage battery 320 has been charged using the above-certified charging equipment. For example, assume that the above certification is given to charging equipment that charges the storage battery 320 using non-fossil electric energy. In this case, the distinguishing unit 12 refers to information recorded on the electric vehicle to determine whether the output power amount of the storage battery 320 of the electric vehicle is a non-fossil electric power amount and fossil/non-fossil electric power amount. You can get the ratio. As another example, the distinguishing unit 12 may regard the output power amount of the storage battery 320 of the electric vehicle as the fossil power amount.

(summary)
The following aspects are disclosed from the embodiments described above.

The power management system (1) according to the first aspect includes an acquisition section (11) and a discrimination section (12). An acquisition unit (11) acquires power amount information. The power amount information is information regarding the power amount at a predetermined observation point. The discrimination unit (12) generates discrimination information based on the source of the electric energy. The discrimination information enables the power generation means to be distinguished regarding the power amount information. The power amount information includes reverse power flow power amount information. The reverse power flow energy information is information regarding the reverse flow power amount supplied from the junction (N1) to the power system (9). The confluence point (N1) is a confluence point of electric power output from each of the plurality of supply sources (3). The plurality of supply sources (3) include two or more supply sources (3) having different means for obtaining electric power. The discrimination information includes reverse power flow discrimination information. The reverse power flow discrimination information enables the generation means to be distinguished regarding the reverse power flow power amount information.

According to the above configuration, it is possible to distinguish the power generation means of the reverse power flow amount. Therefore, for example, it is possible to distinguish between high and low values of reverse flow power amount due to differences in power generation means.

Furthermore, in the power management system (1) according to the second aspect, in the first aspect, the distinction information allows power generation means to be distinguished for each time period with respect to power amount information.

According to the above configuration, the power generation means can be distinguished for each time period, so the convenience of the power management system (1) is improved.

Furthermore, in the power management system (1) according to the third aspect, in the first or second aspect, the power amount information includes power flow power information. The tidal power amount information is information regarding the tidal power amount supplied from the power system (9) to the junction (N1). The discrimination information includes tidal flow discrimination information. The power flow discrimination information enables the power generation means to be distinguished regarding the power flow energy information.

According to the above configuration, the power generation means can be distinguished not only by the amount of reverse power flow but also by the amount of power flow.

Further, in the power management system (1) according to the fourth aspect, in any one of the first to third aspects, the power amount information includes output power amount information. The output power amount information is information regarding the output power amount of each of the plurality of supply sources (3). The discrimination information includes output discrimination information. The output discrimination information enables the power generation means to be distinguished regarding the output power amount information.

According to the above configuration, the power generation means can be distinguished not only by the amount of reverse flow power but also by the amount of output power.

Furthermore, in the power management system (1) according to the fifth aspect, in the fourth aspect, the discrimination unit (12) generates reverse power flow discrimination information based on the output power amount information and the output discrimination information.

According to the above configuration, the accuracy of the reverse power flow discrimination information can be improved.

Furthermore, in the power management system (1) according to the sixth aspect, in the fourth aspect, the plurality of supply sources (3) include a power storage system (32). The power amount information includes input power amount information. The input power amount information is information regarding the input power amount of the power storage system (32). The discrimination information includes input discrimination information. The input discrimination information allows the power generation means to be distinguished regarding the input power amount information.

According to the above configuration, the power generation means can be distinguished not only by the amount of reverse power flow but also by the amount of input power.

Further, in the power management system (1) according to the seventh aspect, in the sixth aspect, the distinguishing unit (12) distinguishes between the output power amount information and the output distinction information, and the input power amount information and the input distinction information. Based on this, reverse power flow discrimination information is generated.

According to the above configuration, the accuracy of the reverse power flow discrimination information can be improved.

Further, in the power management system (1) according to the eighth aspect, in any one of the first to seventh aspects, the distinction information includes information as to whether the electric energy is derived from fossil energy or not. include.

According to the above configuration, it is possible to distinguish whether the amount of electric power is derived from fossil energy or not.

Furthermore, in the power management system (1) according to the ninth aspect, in the eighth aspect, the discriminating unit (12) determines whether the reverse flow power amount includes the power amount derived from fossil energy. If the discrimination unit (12) determines that the reverse power flow amount includes the power amount derived from fossil energy, the discrimination unit (12) generates information indicating that the reverse power flow power amount is the power amount derived from fossil energy as reverse power flow discrimination information. .

According to the above configuration, it is possible to distinguish the reverse power flow amount that does not include the power amount derived from fossil energy from the reverse flow power amount that includes the power amount derived from fossil energy.

Further, in the power management system (1) according to the tenth aspect, in the eighth aspect, the reverse power flow distinction information includes information regarding the ratio of the amount of power derived from fossil energy and the amount of power derived from non-fossil energy.

According to the above configuration, the ratio of the amount of power derived from fossil energy and the amount of power derived from non-fossil energy in the amount of reverse power flow becomes clear.

Further, the power management system (1) according to the eleventh aspect includes a notification section (13) in any one of the first to tenth aspects. The notification unit (13) notifies at least part of the power amount information and at least part of the distinction information.

According to the above configuration, the administrator of the consumer equipment (C1) and the like can use at least a part of the power amount information and at least a part of the distinction information.

Further, in the power management system (1) according to the twelfth aspect, in the eleventh aspect, the notification unit (13) records the reverse power flow discrimination information in the ledger system (102) using a blockchain.

According to the above configuration, it is possible to reduce the possibility that the reverse power flow discrimination information is tampered with.

Furthermore, in the power management system (1) according to the thirteenth aspect, in any one of the first to twelfth aspects, the plurality of supply sources (3) include a power storage system (32). The power management system (1) includes a system control circuit (2) that controls charging and discharging of the power storage system (32).

According to the above configuration, the power management system (1) can integrally distinguish between power generation means and control the power storage system (32).

The configurations other than the first aspect are not essential to the power management system (1) and can be omitted as appropriate.

Further, the power management method according to the fourteenth aspect includes an acquisition process and a differentiation process. The acquisition process is a process of acquiring power amount information. The power amount information is information regarding the power amount at a predetermined observation point. The discrimination process is a process of generating discrimination information based on the source of the electric energy. The discrimination information enables the power generation means to be distinguished regarding the power amount information. The power amount information includes reverse power flow power amount information. The reverse power flow energy information is information regarding the reverse flow power amount supplied from the junction (N1) to the power system (9). The confluence point (N1) is a confluence point of electric power output from each of the plurality of supply sources (3). The plurality of supply sources (3) include two or more supply sources (3) having different means for obtaining electric power. The discrimination information includes reverse power flow discrimination information. The reverse power flow discrimination information enables the generation means to be distinguished regarding the reverse power flow power amount information.

According to the above configuration, it is possible to distinguish the power generation means of the reverse power flow amount. Therefore, for example, it is possible to distinguish between high and low values of reverse flow power amount due to differences in power generation means.

Further, the program according to the fifteenth aspect is a program for causing one or more processors to execute the power management method according to the fourteenth aspect.

According to the above configuration, it is possible to distinguish the power generation means of the reverse power flow amount. Therefore, for example, it is possible to distinguish between high and low values of reverse flow power amount due to differences in power generation means.

Not limited to the above aspects, various configurations (including modified examples) of the power management system (1) according to the embodiment can be realized by a power management method and program.

1 Power management system 2 System control circuit 3 Supply source 9 Power system 11 Acquisition unit 12 Discrimination unit 13 Notification unit 32 Power storage system 102 Ledger system N1 Confluence point

Claims (13)

an acquisition unit that acquires power amount information that is information regarding the power amount at a predetermined observation point;
a distinguishing unit that generates discrimination information that allows the power generation means to be distinguished from each other with respect to the power amount information based on the source of the power amount;
comprising a notification unit that notifies at least a part of the power amount information and at least a part of the distinction information ,
The power amount information includes reverse power flow power amount information that is information regarding the reverse power flow power amount supplied to the power system from a confluence point of power output from each of a plurality of supply sources,
The plurality of supply sources include two or more supply sources having different means for obtaining electric power,
The plurality of supply sources include storage batteries,
The discrimination information includes reverse power flow discrimination information that allows the power generation means to be distinguished with respect to the reverse power flow power amount information,
The notification unit records information regarding the ratio of the amount of electric power charged in the storage battery for each of the power generation means and the reverse power flow distinction information in a ledger system using a blockchain.
Power management system. The discrimination information allows the power generation means to be distinguished for each time period with respect to the power amount information.
The power management system according to claim 1. The power amount information includes tidal power amount information that is information regarding the tidal power amount supplied from the power system to the confluence point,
The discrimination information includes power flow discrimination information that allows the power generation means to be distinguished with respect to the power flow energy information.
The power management system according to claim 1 or 2. The power amount information includes output power amount information that is information regarding the output power amount of each of the plurality of supply sources,
The discrimination information includes output discrimination information that allows the power generation means to be distinguished with respect to the output power amount information.
The power management system according to any one of claims 1 to 3. The discrimination unit generates the reverse power flow discrimination information based on the output power amount information and the output discrimination information.
The power management system according to claim 4. The plurality of supply sources include a power storage system,
The power amount information includes input power amount information that is information regarding the input power amount of the power storage system,
The discrimination information includes input discrimination information that allows the power generation means to be distinguished with respect to the input power amount information.
The power management system according to claim 4. The discrimination unit generates the reverse power flow discrimination information based on the output power amount information and the output discrimination information, and the input power amount information and the input discrimination information.
The power management system according to claim 6. The distinction information includes information as to whether the amount of electricity is derived from fossil energy.
The power management system according to any one of claims 1 to 7. The discrimination unit determines whether or not the reverse power flow power amount includes a power amount derived from fossil energy, and when it is determined that the reverse power flow power amount includes a power amount derived from fossil energy, the reverse power flow discrimination unit determines whether the reverse power flow power amount includes a power amount derived from fossil energy. generating information that the reverse flow power amount is a fossil energy-derived power amount as information;
The power management system according to claim 8. The reverse power flow distinction information includes information regarding the ratio between the amount of electricity derived from fossil energy and the amount of electricity derived from non-fossil energy.
The power management system according to claim 8. The plurality of supply sources include a power storage system,
The power management system includes a system control circuit that controls charging and discharging of the power storage system.
The power management system according to any one of claims 1 to 10. an acquisition process for acquiring power amount information that is information regarding the power amount at a predetermined observation point;
Discrimination processing that generates discrimination information that allows the generation means to be distinguished from each other with respect to the electricity amount information based on the source of the electricity amount;
a notification process for notifying at least a part of the power amount information and at least a part of the distinction information,
The power amount information includes reverse power flow power amount information that is information regarding the reverse power flow power amount supplied to the power system from a confluence point of power output from each of a plurality of supply sources,
The plurality of supply sources include two or more supply sources having different means for obtaining electric power,
The plurality of supply sources include storage batteries,
The discrimination information includes reverse power flow discrimination information that allows the power generation means to be distinguished with respect to the reverse power flow power amount information,
In the notification process, information regarding the ratio of the amount of electric power charged in the storage battery for each of the power generation means and the reverse power flow distinction information are recorded in a ledger system using a blockchain.
Power management methods. for causing one or more processors to execute the power management method according to claim 12;
program.

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