JP7657469B2 - Power Management System - Google Patents

Description

This invention relates to a power management system equipped with a renewable energy power generation facility that uses renewable energy (natural energy) such as solar power generation, and a storage battery.

There have been various proposals for power management systems that include renewable energy power generation equipment that uses renewable energy (natural energy) such as solar power generation and storage batteries.

For example, there are known power management systems that support multiple consumers, such as TEMS (Town Energy Management System) and CEMS (Community Energy Management System). When the load power is small compared to the power generated by the solar power generation facility, and surplus power is generated by the solar power generation facility, the surplus power can be used effectively by charging the surplus power to a storage battery. However, when the storage battery cannot be charged, for example, the surplus power cannot flow into the grid power supply and is lost, and the power generated by the solar power generation facility cannot be used effectively.

Patent Document 1 proposes a power management system that targets multiple consumer facilities, including consumer facilities equipped with power generation equipment that uses renewable energy, and aims to promote the effective use of power generated by the power generation equipment.

Patent Document 2 also proposes a power supply system that formulates a power transmission plan based on a predicted surplus power value based on the difference between a predicted value of power generation by renewable energy and a predicted value of power demand, and includes a control unit that controls the production and storage of hydrogen, the charge amount of the storage battery, and the power generation amount of the fuel cell based on a comparison result between the predicted value of the surplus power and the actual value and a comparison result with the charging rate of the storage battery.

Patent No. 6192531 Patent No. 7134043

Today in Japan, conventional power generation facilities such as thermal power plants, nuclear power plants, hydroelectric power plants, and pumped storage power plants operate in parallel with renewable energy power generation facilities such as solar power generation, wind power generation, and geothermal power generation. Electricity supply from these power generation facilities and the electricity demand of load facilities that use electricity, such as factories, companies, stores, and homes, are adjusted in the electricity market, and electricity supply and usage are carried out.

In renewable energy power generation facilities such as solar power generation facilities and wind power generation facilities, the timing of power generation is often left to natural conditions, and when the amount of electricity generated by the renewable energy power generation facilities is greater than the electricity demand, it becomes necessary to take measures such as shutting down the operation of the renewable energy power generation facilities or discarding the electricity generated by the renewable energy power generation facilities.

Therefore, efforts are being made to set up storage equipment such as batteries next to renewable energy power generation facilities, temporarily store the electricity generated by the renewable energy power generation facilities in the storage equipment, and, when necessary, discharge the electricity from the storage equipment to supply it to the electricity demand of the load equipment.

Electric vehicles are expected to become more common in Japan in the future. Electric vehicles are equipped with storage facilities (batteries), so as electric vehicles become more common in Japan, storage facilities (batteries) will become more widespread throughout the country.

As electric vehicles become more widespread, energy storage facilities (batteries) will become more widespread throughout Japan. In other words, energy storage facilities (batteries) installed in electric vehicles will be advantageously utilized to adjust the above-mentioned electricity supply and demand in the electricity market.

Since people who use or own electric vehicles are also the users and owners of the electricity storage equipment (batteries) installed in electric vehicles, which are in widespread use throughout Japan, it would be beneficial for the spread of electric vehicles if some economic benefit were to be given to users and owners of electric vehicles in exchange for utilizing the electricity storage equipment (batteries) installed in electric vehicles as described above.

The present invention therefore aims to propose an electricity management system that incorporates the discharge from and charging of storage equipment (batteries) widely present throughout Japan to adjust between power generation and supply by conventional power generation facilities such as thermal power plants, nuclear power plants, hydroelectric power plants, and pumped storage power plants, and power generation and supply by renewable energy power generation facilities such as solar power generation, wind power generation, and geothermal power generation, and the power demand of load equipment that uses electricity in factories, companies, stores, homes, etc., and further provides some kind of economic benefit to the users and owners of the storage equipment (batteries) for using the storage equipment (batteries) in this way.

The power management system proposed by this invention incorporates the discharge from and charging of storage batteries (storage batteries) that are widely found throughout Japan, such as batteries installed in electric vehicles, to adjust between power generation and supply by conventional power generation facilities such as thermal power plants, nuclear power plants, hydroelectric power plants, and pumped storage power plants, and power generation and supply by renewable energy power generation facilities such as solar power generation, wind power generation, and geothermal power generation, and the power demand of load facilities that use electricity in factories, companies, stores, homes, etc. When there is surplus electricity generated by renewable energy power generation facilities, it is used as the storage battery. This is a power management system that charges the power storage equipment (storage battery) within the charging range of the equipment (storage battery), and when the power demand cannot be met by the power generated by the conventional power generation equipment as planned and the power generated by the renewable energy power generation equipment that is generating power in parallel, the power storage equipment (storage battery) is discharged within the discharging range of the power storage equipment (storage battery) to supply the power demand, and further provides some economic benefit to the user/owner of the power storage equipment (storage battery) for utilizing the power storage equipment (storage battery) as described above.

As a form of providing some economic benefit to the user/owner of the storage equipment (storage battery) for utilizing the storage equipment (storage battery) as described above, a form can be adopted in which the unit price of the discharge fee paid to the user/owner for the aforementioned discharge from the storage equipment (storage battery) is made higher than the unit price of the charging fee charged to the user/owner for the aforementioned charging to the storage equipment (storage battery).

Such an embodiment of the present invention can be exemplified as follows.
[1]
a power demand forecast calculation means for calculating a unit load equipment power demand forecast, which is a power demand for each predetermined time unit in the future for each of a plurality of load equipments being managed, and for calculating a load equipment total power demand forecast, which is a power demand for each predetermined time unit in the future for the plurality of load equipments as a whole;
a conventional power generation facility power generation forecast calculation means for calculating a unit conventional power generation facility power generation forecast, which is the amount of power generation planned for each of a plurality of conventional power generation facilities being managed for each of the predetermined time units in the future at the time when the power demand forecast calculation means calculates the unit load facility power demand forecast and the load facility total power demand forecast, and for calculating a conventional power generation facility total power generation forecast, which is the sum of the amount of power generation planned for each of the predetermined time units in the future for the entire plurality of conventional power generation facilities;
a renewable energy power generation amount forecast calculation means for calculating a unit renewable energy power generation amount forecast, which is the amount of power generated by each of a plurality of renewable energy power generation facilities that are managed for each of the predetermined time units in the future at the time when the power demand forecast calculation means calculates the unit load equipment power demand forecast and the load equipment total power demand forecast, and for calculating a renewable energy power generation amount forecast, which is the total amount of power generated by all of the plurality of renewable energy power generation facilities for each of the predetermined time units in the future;
a chargeable/dischargeable amount calculation means for calculating a dischargeable amount and a chargeable amount of each of a plurality of power storage facilities under management as a unit chargeable/dischargeable amount prediction for each of the predetermined future time units based on information regarding a dischargeable amount and a chargeable amount of each of a plurality of power storage facilities under management at a time point when the power demand forecast calculation means calculates the unit load equipment power demand forecast and the load equipment total power demand forecast;
and a charge/discharge amount calculation means for calculating a total discharge amount, which is the entire amount of power supplied from the plurality of power storage facilities to the plurality of load facilities, for each of the specified time units in the future, based on the load equipment total power demand forecast, the conventional power generation equipment total power generation forecast, the renewable energy power generation equipment total power generation forecast, and the total chargeable/dischargeable amount forecast, or for calculating a total charge amount, which is the entire amount of power supplied from the plurality of renewable energy power generation facilities to the plurality of power storage facilities, as a total charge amount prediction.

[2]
The power management system of [1] further comprising a charge/discharge fee calculation means for calculating a total discharge fee which is a total amount of discharge fees to be paid to a plurality of owners of the power storage facilities who own the plurality of power storage facilities according to the total discharge amount, or for calculating a total charging fee which is a total amount of charging fees to be charged to the plurality of owners of the power storage facilities according to the total charge amount.

[3]
The power management system according to [1] or [2], wherein the charge/discharge amount calculation means calculates a unit discharge amount to be discharged from each of the power storage facilities or a unit charge amount to be charged to each of the power storage facilities.

[4]
The charge/discharge fee calculation means further calculates, in accordance with the unit discharge amount, a unit discharge fee which is a discharge fee to be paid to the owner of the power storage equipment for which the unit discharge amount has been calculated, or calculates, in accordance with the unit charge amount, a unit charging fee which is a charging fee to be charged to the owner of the power storage equipment for which the unit charge amount has been calculated.

[5]
An energy management system in which the unit discharge fee, which is the unit price of the unit discharge fee, is set higher than the unit charging fee, which is the unit price of the unit charging fee [4].

[6]
a conventional power generation equipment allowable power reduction prediction calculation means for calculating a unit conventional power generation equipment allowable power reduction prediction, which is an allowable power reduction amount for each of the plurality of conventional power generation equipment for each of the predetermined time units in the future, and for calculating a conventional power generation equipment total allowable power reduction prediction, which is a total of an allowable power reduction amount for each of the plurality of conventional power generation equipment for each of the predetermined time units in the future;
and a conventional power generation equipment allowable power increase calculation means for calculating a unit conventional power generation equipment allowable power increase forecast, which is an allowable power increase for each of the plurality of conventional power generation equipment for each of the predetermined time units in the future, and for calculating a conventional power generation equipment total allowable power increase forecast, which is a total of an allowable power increase for each of the plurality of conventional power generation equipment for each of the predetermined time units in the future,
The power management system according to any one of [1] to [5], wherein the charge/discharge amount calculation means refers to the conventional power generation equipment total allowable power generation reduction forecast and the conventional power generation equipment total allowable power generation increase forecast when calculating the total discharge amount forecast or the total charge amount forecast.

According to this invention, it is possible to provide a power management system that incorporates the discharge from and charging of storage equipment (storage batteries) widely present throughout Japan to adjust between power generation and power supply by conventional power generation facilities such as thermal power plants, nuclear power plants, hydroelectric power plants, and pumped storage power plants, and power generation and power supply by renewable energy power generation facilities such as solar power generation, wind power generation, and geothermal power generation, and the power demand of load equipment that uses electricity in factories, companies, stores, homes, etc., and further provides a certain economic benefit to the users and owners of the storage equipment (storage batteries) for using the storage equipment (storage batteries) in this way.

1 is a conceptual diagram illustrating a configuration of an embodiment of a power management system according to the present invention. 1 is a block diagram illustrating an example of a system configuration of an embodiment of a power management system according to the present invention.

The power management system of the present invention is configured by a computer system, and in the embodiment shown in the schematic configuration of Figure 1, a management server 1, multiple load equipment terminals 3a, 3b, 3c, ..., multiple conventional power generation equipment terminals 5a, 5b, 5c, ..., multiple renewable energy power generation equipment terminals 7a, 7b, 7c, ..., and multiple storage equipment terminals 9a, 9b, 9c, ... are connected via a network 10 so that they can exchange information.

As shown in FIG. 1, multiple load equipment terminals 3a, 3b, 3c, ... are provided for each of multiple load equipment 2a, 2b, 2c, ... that are subject to management by the power management system of this embodiment.

As shown in FIG. 1, multiple conventional power generation equipment terminals 5a, 5b, 5c, ... are installed in each of multiple conventional power generation equipment 4a, 4b, 4c, ... that are subject to management by the power management system of this embodiment.

As shown in FIG. 1, multiple renewable energy power generation equipment terminals 7a, 7b, 7c, ... are installed at each of multiple renewable energy power generation equipment 6a, 6b, 6c, ... that are subject to management by the power management system of this embodiment.

As shown in FIG. 1, a plurality of power storage equipment terminals 9a, 9b, 9c, ... are provided for each of a plurality of power storage equipment 8a, 8b, 8c, ... that are subject to management by the power management system of this embodiment.

The multiple load equipment 2a, 2b, 2c, ... are load equipment that uses electricity, for example, in factories, companies, stores, homes, etc. Hereinafter, in this specification and drawings, the load equipment 2a, 2b, 2c, ... may be collectively referred to simply as "load equipment 2."

The multiple conventional power generation facilities 4a, 4b, 4c, ... are, for example, power generation facilities such as thermal power plants, nuclear power plants, hydroelectric power plants, and pumped storage power plants. Hereinafter, in this specification and drawings, the conventional power generation facilities 4a, 4b, 4c, ... may be collectively referred to simply as "conventional power generation facilities 4."

The multiple renewable energy power generation facilities 6a, 6b, 6c, ... are, for example, power generation facilities such as solar power generation, wind power generation, and geothermal power generation. Hereinafter, in this specification and drawings, the renewable energy power generation facilities 6a, 6b, 6c, ... may be collectively referred to simply as "renewable energy power generation facilities 6."

Note that hydroelectric power plants and pumped-storage power plants are sometimes considered forms of renewable energy generation, but in this specification they are treated as conventional power generation facilities.

The multiple power storage facilities 8a, 8b, 8c, ... are power storage facilities such as storage batteries that can be used in conjunction with the renewable energy power generation facility 6, and power storage facilities such as storage batteries installed in electric vehicles, and are the power storage facilities that are the targets of management by the power management system of this embodiment. These power storage facilities are used, as necessary, to temporarily store the power generated by the renewable energy power generation facility 6, or to discharge the power for the purpose of temporarily supplying power to the above-mentioned loads, etc. Hereinafter, in this specification and drawings, the power storage facilities 8a, 8b, 8c, ... may be collectively referred to simply as "power storage facilities 8".

In the embodiment shown in FIG. 1, only the load equipment 2a, 2b, 2c, conventional power generation equipment 4a, 4b, 4c, renewable energy power generation equipment 6a, 6b, 6c, and storage equipment 8a, 8b, 8c are shown, but the multiple load equipment 2, multiple conventional power generation equipment 4, multiple renewable energy power generation equipment 6, and multiple storage equipment 8 are present in a region or area managed by the power management system of the present invention, such as the Hokkaido area, the Tohoku area consisting of the six Tohoku prefectures of Aomori, Akita, Iwate, Yamagata, Miyagi, and Fukushima, the East Japan area, and the West Japan area, and include the multiple load equipment 2, multiple conventional power generation equipment 4, multiple renewable energy power generation equipment 6, and multiple storage equipment 8, whose demand and supply of electricity, charging to the storage equipment, and discharging from the storage equipment are managed and adjusted by the power management system of the present invention.

The load equipment 2 that is the subject of management by the power management system of this embodiment, the conventional power generation equipment 4 that is the subject of management by the power management system of this embodiment, the renewable energy power generation equipment 6 that is the subject of management by the power management system of this embodiment, and the power storage equipment 8 that is the subject of management by the power management system of this embodiment are located in the above-mentioned managed area managed by the power management system of the present invention, and the power demand and supply, charging to the power storage equipment, and discharging from the power storage equipment are managed and adjusted by the power management system of the present invention, and may be referred to simply as "load equipment that is being managed," "conventional power generation equipment that is being managed," "renewable energy power generation equipment that is being managed," and "power storage equipment that is being managed" in this specification.

The management server 1 is composed of a computer, and although not shown, includes a CPU that performs control so that the various functions of the system of this embodiment are realized according to an operating system and specific computer programs that have been installed or downloaded, a ROM that stores the operating system and various computer programs and serves as a storage unit for storing data necessary for the CPU to execute processes for each control, a RAM and a hard disk that store data necessary for the CPU to execute processes and are also used as a work area where information is rewritten by the CPU as appropriate, and information input/output units such as a communication interface, all of which are connected by the necessary bus lines.

The management server 1 can be configured as a server built on the cloud. It can also be configured as a server consisting of multiple server computers in which each of the means described below is distributed.

The load equipment terminals 3a, 3b, 3c, ..., conventional power generation equipment terminals 5a, 5b, 5c, ..., renewable energy power generation equipment terminals 7a, 7b, 7c, ..., and storage equipment terminals 9a, 9b, 9c, ... are comprised of general-purpose devices that are widely used in the general public, such as personal computers, smartphones, and tablet terminals, and are connected to the management server 1, which is a computer, via a wired or wireless network 10 such as the Internet so that information can be exchanged, and execute various processing operations, which will be described later, using a specified computer program.

Hereinafter, in this specification and drawings, the load equipment terminals 3a, 3b, 3c, ..., conventional power generation equipment terminals 5a, 5b, 5c, ..., renewable energy power generation equipment terminals 7a, 7b, 7c, ..., and power storage equipment terminals 9a, 9b, 9c, ... may be collectively referred to simply as "load equipment terminal 3", "conventional power generation equipment terminal 5", "renewable energy power generation equipment terminal 7", and "power storage equipment terminal 9".

Figure 2 is a block diagram illustrating an example of the system configuration of one embodiment of a power management system according to the present invention.

The management server 1 includes a power demand forecast calculation means 100, a conventional power generation equipment power generation forecast calculation means 101, a renewable energy power generation forecast calculation means 102, a chargeable/dischargeable amount calculation means 103, a charge/discharge amount calculation means 104, a charge/discharge fee calculation means 105, a conventional power generation equipment allowable power generation reduction forecast calculation means 106, and a conventional power generation equipment allowable power generation increase calculation means 107, which each execute the processing operations described below under a specific computer program.

In the illustrated embodiment, the database 200 of the management server 1 includes a load equipment power demand performance history database 201, a conventional power generation equipment power generation performance history database 202, a renewable energy power generation equipment power generation performance history database 203, a climate and environmental condition performance history database 204, an event performance history database 205, a charging equipment database 206, a charge and discharge performance history database 207, a fee table database 208, a power transmission and distribution network database 209, a power generation equipment operation plan database 210, an event plan database 211, a load equipment total power demand forecast database 212, a conventional power generation equipment power generation amount forecast database 213, a renewable energy power generation equipment power generation amount forecast database 214, a charge and discharge possible amount forecast database 215, a charge and discharge amount forecast database 216, a charge and discharge fee database 217, a conventional power generation equipment allowable power reduction amount forecast database 218, and a conventional power generation equipment allowable power increase amount forecast database 219. Hereinafter, in the present specification and drawings, the database may be simply referred to as "DB".

The load equipment power demand performance history DB201 accumulates and stores information on the load equipment power demand performance history, which is referenced by the power demand forecast calculation means 100 described later when performing the unit load equipment power demand forecast calculation process and the load equipment total power demand forecast calculation process. That is, the power demand performance for a predetermined time unit in the past (for example, 1:00 pm to 2:00 pm on Monday, November 1, 2021) for each of the multiple load equipment 2 that is the subject of management by the power management system of this embodiment is stored as history information. The power demand performance for a predetermined time unit in the past for each of the multiple load equipment 2 is accumulated and stored in the load equipment power demand performance history DB201, for example, by the management server 1 acquiring information on the power demand performance from each load equipment terminal 3 via the network 10 for each of the predetermined time units.

The conventional power generation equipment power generation performance history DB 202 accumulates and stores information about the conventional power generation equipment power generation performance history, which is referenced when the conventional power generation equipment power generation forecast calculation means 101 described later performs the unit conventional power generation equipment power generation forecast calculation process and the conventional power generation equipment total power generation forecast calculation process. That is, the power generation performance in a predetermined time unit in the past (for example, 1:00 pm to 2:00 pm on Monday, November 1, 2021) for each of the multiple conventional power generation equipment 4 that are the subject of management by the power management system of this embodiment is stored as history information. The power generation performance in a predetermined time unit in the past for each of the multiple conventional power generation equipment 4 is accumulated and stored in the conventional power generation equipment power generation performance history DB 202, for example, by the management server 1 acquiring information about the power generation performance from each conventional power generation equipment terminal 5 for each of the predetermined time units via the network 10, etc.

The renewable energy power generation equipment power generation performance history DB203 accumulates and stores information on the renewable energy power generation equipment power generation performance history, which is referenced by the renewable energy power generation amount prediction calculation means 102 described later when performing the unit renewable energy power generation equipment power generation amount prediction calculation process and the renewable energy power generation equipment total power generation amount prediction calculation process. That is, the power generation performance in a predetermined time unit in the past (for example, 1:00 pm to 2:00 pm on Monday, November 1, 2021) in each of the multiple renewable energy power generation equipment 6 that are the subject of management by the power management system of this embodiment is stored as history information. The power generation performance in a predetermined time unit in the past in each of the multiple renewable energy power generation equipment 6 is accumulated and stored in the renewable energy power generation equipment power generation performance history DB203, for example, by the management server 1 acquiring information on the power generation performance from each renewable energy power generation equipment terminal 7 for each of the predetermined time units via the network 10, etc.

The climate and environmental condition performance history DB 204 accumulates and stores climate and environmental condition data that is referenced when the conventional power generation equipment power generation forecast calculation means 101 described later performs the unit conventional power generation equipment power generation forecast calculation process and the conventional power generation equipment total power generation forecast calculation process, and when the renewable energy power generation forecast calculation means 102 described later performs the unit renewable energy power generation equipment power generation forecast calculation process and the renewable energy power generation equipment total power generation forecast calculation process. For example, past climate and environmental condition performance history information and future climate and environmental condition forecasts in the area where each of the multiple load equipment 2 that is the object of management by the power management system of this embodiment is located, which affects the power demand of the multiple load equipment 2, and past climate and environmental condition performance history information and future climate and environmental condition forecasts in the area where each of the multiple renewable energy power generation equipment 6 that is the object of management by the power management system of this embodiment is located are stored.

The data on these climate and environmental conditions stored in the climate and environmental condition performance history DB204 is acquired by the management server 1 from commercial websites that provide such data, and is then accumulated and stored in the climate and environmental condition performance history DB204.

The event performance history DB205 accumulates and stores information related to the event performance history, which is referenced by the power demand forecast calculation means 100 described later when performing the unit load equipment power demand forecast calculation process and the load equipment total power demand forecast calculation process. That is, the event performance history (e.g., holidays, festivals, concerts, etc.) history in the area where the multiple load equipment 2 that are the subject of management by the power management system of this embodiment are located, and information related to the actual power demand of the corresponding load equipment 2 during the event are stored. Such information stored in the event performance history DB205 is created by a specific processing operation unit of the management server 1 by referring to the event performance history information of various events acquired by the management server 1 and the above-mentioned information accumulated and stored in the load equipment power demand performance history DB201, and is stored in the event performance history DB205.

The charging equipment DB 206 stores data on a plurality of storage equipment 8 that are the subject of management by the power management system of this embodiment. The data on the storage equipment 8 includes information on the location where the storage equipment 8 is installed, information on the location where the storage battery is charged and discharged if the storage battery 8 is a storage battery installed in an electric vehicle, information on the owner of the storage equipment 8 (for example, information on the payee of the discharge fee paid by the manager/operator of the power management system of this embodiment according to the amount of discharge when the storage equipment 8 is discharged or charged under the management of the power management system of this embodiment, and information on the owner of the storage equipment 8 who is the payee of the charge fee charged by the manager/operator of the power management system of this embodiment according to the amount of charge), information on the dischargeable amount and chargeable amount of each storage equipment 8, etc.

When each power storage facility 8 is registered as a target for management by the power management system of this embodiment, information regarding the location where the power storage facility 8 is installed, the location where the battery is charged and discharged if the power storage facility 8 is a battery installed in an electric vehicle, and information regarding the owner of the power storage facility 8 are acquired by the management server 1 and stored and accumulated in the charging facility DB 206.

Information regarding the dischargeable amount and chargeable amount of each power storage facility 8 is accumulated and stored in the charging facility DB 206 by the management server 1 acquiring this information from each power storage facility terminal 9 via the network 10, etc. This information acquisition, accumulation, and storage can be in the form of each power storage facility terminal 9 sending the information to the management server 1 via the network 10 at time intervals such as one hour, corresponding to the above-mentioned predetermined time unit.

The information regarding the dischargeable amount and chargeable amount of each power storage device 8 is referenced during the unit chargeable/dischargeable amount prediction calculation process and the total chargeable/dischargeable amount prediction calculation process performed by the chargeable/dischargeable amount calculation means 103 described below.

In the charge/discharge performance history DB207, for each of the multiple storage equipment 8 that are the subject of management by the power management system of this embodiment, information on the amount of discharge when each storage equipment 8 is discharged under the management of the power management system of this embodiment, and information on the amount of charge when each storage equipment 8 is charged under the management of the power management system of this embodiment are accumulated and stored. This information is referenced during the unit chargeable/dischargeable amount forecast calculation process and the total chargeable/dischargeable amount forecast calculation process performed by the chargeable/dischargeable amount calculation means 103 described later. In addition, this information is accumulated and stored in the charge/discharge performance history DB207 by the management server 1 acquiring this information from each storage equipment terminal 9 via the network 10, etc.

The fee table DB208 stores information such as the unit price of the discharge fee required to calculate the total discharge fee, which is the total amount of discharge fees paid to the owners of the multiple energy storage facilities 8 who own the multiple energy storage facilities 8, according to the total discharge amount, which is the total amount of power supplied from the multiple energy storage facilities 8 to the multiple load facilities 2 for each specified time unit in the future, and the unit price of the charging fee required to calculate the total charging fee, which is the total amount of charging fees charged to the owners of the multiple energy storage facilities 8, according to the total charging amount, which is the total amount of power supplied from the multiple renewable energy power generation facilities 4 to the multiple energy storage facilities 8. This information is referenced during the calculation process performed by the charging/discharging fee calculation means 105 described later.

In the power transmission and distribution network DB209, information about the power transmission and distribution network deployed for transmitting electricity between the load equipment 2, the conventional power generation equipment 4, the renewable energy power generation equipment 6, and the power storage equipment 8 is accumulated and stored. For example, information about the distance between the load equipment 2 and the conventional power generation equipment 4, the renewable energy power generation equipment 6, and the power storage equipment 8, and information about the transmission loss when electricity is transmitted through each transmission line is accumulated and stored.

The power generation equipment operation plan DB 210 accumulates and stores information on operation plans for each conventional power generation equipment 4 and each renewable energy power generation equipment 6, i.e., power generation plans planned for the future. The management server 1 acquires this information from each conventional power generation equipment terminal 5 and each renewable energy power generation equipment terminal 7 via the network 10, etc., and the information is accumulated and stored in the power generation equipment operation plan database 210.

If there are any changes in the operation plans of each conventional power generation facility 4 and each renewable energy power generation facility 6, the management server 1 obtains the information from each conventional power generation facility terminal 5 and each renewable energy power generation facility terminal 7 via the network 10, etc., and updates the information in the power generation facility operation plan DB 210.

The event plan DB211 accumulates and stores information about scheduled events that are expected to cause fluctuations in electricity demand in the area where the load equipment 2 is located.

The load equipment total power demand forecast DB212 accumulates and stores the load equipment total power demand forecast calculated by the power demand forecast calculation means 100 described below.

The conventional power generation equipment power generation forecast DB213 accumulates and stores the unit conventional power generation equipment power generation forecast and the conventional power generation equipment total power generation forecast calculated by the conventional power generation equipment power generation forecast calculation means 101 described below.

The renewable energy power generation facility power generation forecast DB214 accumulates and stores the unit renewable energy power generation facility power generation forecast and the total renewable energy power generation facility power generation forecast calculated by the renewable energy power generation forecast calculation means 102 described below.

The chargeable/dischargeable amount prediction DB215 accumulates and stores the unit chargeable/dischargeable amount prediction and the total chargeable/dischargeable amount prediction calculated by the chargeable/dischargeable amount calculation means 103 described below.

The charge/discharge amount prediction DB216 accumulates and stores the total discharge amount prediction or the total charge amount prediction calculated by the charge/discharge amount calculation means 104 described later. In addition, the unit discharge amount or unit charge amount calculated by the charge/discharge amount calculation means 104 described later is accumulated and stored.

The charge/discharge fee DB217 accumulates and stores the total discharge fee or the total charging fee calculated by the charge/discharge fee calculation means 105 described below. It also accumulates and stores the unit discharge fee or the unit charging fee calculated by the charge/discharge fee calculation means 105 described below.

The conventional power generation equipment allowable power reduction forecast DB218 accumulates and stores the unit conventional power generation equipment allowable power reduction forecast calculated by the conventional power generation equipment allowable power reduction forecast calculation means 107 described below and the conventional power generation equipment total allowable power reduction forecast.

The conventional power generation equipment allowable power generation increase forecast DB219 accumulates and stores the unit conventional power generation equipment allowable power generation increase forecast calculated by the conventional power generation equipment allowable power generation increase calculation means 108 described below and the conventional power generation equipment total allowable power generation increase forecast.

The power demand forecast calculation means 100 calculates a unit load equipment power demand forecast, which is the power demand for each future predetermined time unit (e.g., 1:00 PM to 2:00 PM on December 1, 2022) for each of the multiple load equipment 2 being managed, and calculates a load equipment total power demand forecast, which is the power demand for each future predetermined time unit (i.e., 1:00 PM to 2:00 PM on December 1, 2022) for the entire multiple load equipment 2. The calculated load equipment total power demand forecast is associated with the time information (e.g., 1:00 PM on November 30, 2022, the day before the future predetermined time unit (e.g., 1:00 PM to 2:00 PM on December 1, 2022) at which the power demand forecast calculation means 100 calculated the unit load equipment power demand forecast and the load equipment total power demand forecast in the above case) and is accumulated and stored in the load equipment total power demand forecast DB 212.

The conventional power generation equipment power generation forecast calculation means 101 calculates a unit conventional power generation equipment power generation forecast, which is the planned power generation of each of the multiple conventional power generation equipment 4 under management, for each of the predetermined future time units (i.e., from 1:00 pm to 2:00 pm on December 1, 2022) at the time when the power demand forecast calculation means 100 calculates the unit load equipment power demand forecast and the load equipment total power demand forecast (in the above case, 1:00 pm on November 30, 2022), and also performs processing to calculate a conventional power generation equipment total power generation forecast, which is the sum of the planned power generation of the multiple conventional power generation equipment 4 as a whole for each of the predetermined future time units (i.e., from 1:00 pm to 2:00 pm on December 1, 2022). The calculated unit conventional power generation equipment power generation forecast and conventional power generation equipment total power generation forecast are associated with the time information (i.e., 1:00 p.m. on November 30, 2022) at which the power demand forecast calculation means 100 calculated the unit load equipment power demand forecast and the load equipment total power demand forecast, and are accumulated and stored in the conventional power generation equipment power generation forecast DB 213.

The renewable energy power generation forecast calculation means 102 calculates a unit renewable energy power generation forecast, which is the amount of power generated by each of the multiple renewable energy power generation facilities 6 that are managed for each of the predetermined future time units (i.e., 1:00 PM on December 1, 2022) at the time when the power demand forecast calculation means 100 calculates the unit load equipment power demand forecast and the load equipment total power demand forecast (in the above case, 1:00 PM on November 30, 2022), and also calculates a total renewable energy power generation forecast, which is the sum of the amount of power generated by the multiple renewable energy power generation facilities 6 as a whole for each of the predetermined future time units (i.e., 1:00 PM on December 1, 2022). The calculated unit renewable energy power generation facility power generation forecast and the total renewable energy power generation facility power generation forecast are associated with the time information (i.e., 1:00 p.m. on November 30, 2022) at which the power demand forecast calculation means 100 calculated the unit load facility power demand forecast and the load facility total power demand forecast, and are accumulated and stored in the renewable energy power generation facility power generation forecast DB 214.

The chargeable/dischargeable capacity calculation means 103 calculates the dischargeable capacity and chargeable capacity of each of the multiple storage facilities 8 under management for each of the predetermined future time units (i.e., 1:00 pm to 2:00 pm on December 1, 2022) as a unit chargeable/dischargeable capacity prediction, based on information regarding the dischargeable capacity and chargeable capacity of each of the multiple storage facilities 8 under management at the time when the power demand forecast calculation means 100 calculates the unit load equipment power demand forecast and the load equipment total power demand forecast (in the above case, 1:00 pm on November 30, 2022), and performs a process of calculating the dischargeable capacity and chargeable capacity of the multiple storage facilities 8 as a total chargeable/dischargeable capacity prediction. The calculated unit chargeable/dischargeable capacity forecast and total chargeable/dischargeable capacity forecast are associated with the time information (i.e., 1:00 p.m. on November 30, 2022) at which the power demand forecast calculation means 100 calculated the unit load equipment power demand forecast and the load equipment total power demand forecast, and are accumulated and stored in the chargeable/dischargeable capacity forecast DB 215.

The charge/discharge amount calculation means 104 performs a process of calculating a total discharge amount, which is the total amount of power supplied from the multiple storage facilities 8 to the multiple load facilities 2, as a total discharge amount prediction, for each of the predetermined future time units (i.e., 1:00 PM to 2:00 PM on December 1, 2022) based on the load facility total power demand prediction, the conventional power generation facility total power generation prediction, the renewable energy power generation facility total power generation prediction, and the total chargeable/dischargeable amount prediction, or calculating a total charge amount, which is the total amount of power supplied from the multiple renewable energy power generation facilities 6 to the multiple storage facilities 8, as a total charge amount prediction. The calculated total discharge amount prediction or total charge amount prediction is associated with the time information (i.e., 1:00 PM on November 30, 2022) at which the power demand prediction calculation means 100 calculated the unit load facility power demand prediction and the load facility total power demand prediction, and is accumulated and stored in the charge/discharge amount prediction DB 216.

The charge/discharge fee calculation means 105 performs a process of calculating a total discharge fee, which is the total amount of discharge fees to be paid to the owners of the multiple storage facilities 8 according to the total discharge amount, or calculating a total charge fee, which is the total amount of charge fees to be charged to the owners of the multiple storage facilities according to the total charge amount. The calculated total discharge fee or the calculated total charge fee is associated with the time information when the power demand forecast calculation means 100 calculated the unit load equipment power demand forecast and the load equipment total power demand forecast, and is accumulated and stored in the charge/discharge fee DB 217.

The charge/discharge amount calculation means 104 further performs a process of calculating a unit discharge amount discharged from each of the power storage facilities 8 or a unit charge amount charged to each of the power storage facilities 8. The calculated unit discharge amount or the calculated unit charge amount is associated with time information at which the power demand forecast calculation means 100 calculated the unit load equipment power demand forecast and the load equipment total power demand forecast, and is accumulated and stored in the charge/discharge amount prediction DB 216.

The charge/discharge fee calculation means 105 further performs a process of calculating a unit discharge fee, which is a discharge fee to be paid to the owner of the power storage equipment 8 for which the unit discharge amount has been calculated, according to the unit discharge amount, or calculating a unit charging fee, which is a charging fee to be paid to the owner of the power storage equipment 8 for which the unit charge amount has been calculated, according to the unit charging amount.

The calculated unit discharge fee or the calculated unit charging fee is associated with the time information when the power demand forecast calculation means 100 calculated the unit load equipment power demand forecast and the load equipment total power demand forecast, and is accumulated and stored in the charging and discharging fee DB 217.

It is possible to set the unit discharge fee, which is the unit price of the unit discharge fee, to a higher value than the unit charging fee, which is the unit price of the unit charging fee.

In this embodiment, the demand and supply of electricity is adjusted by charging the storage equipment and discharging the storage equipment among a plurality of load equipment 2, a plurality of conventional power generation equipment 4, a plurality of renewable energy power generation equipment 6, and a plurality of storage equipment 8 that exist in the regions and areas managed by the power management system of the present invention, such as the Hokkaido area, the Tohoku area consisting of the six Tohoku prefectures of Aomori, Akita, Iwate, Yamagata, Miyagi, and Fukushima, the East Japan area, and the West Japan area.

The power demand from the multiple load facilities 2, the power generation by the multiple conventional power generation facilities 4, and the power generation by the multiple renewable energy power generation facilities 6 will be very large, and the power storage facility 8 will also be very large because it uses storage batteries installed in electric vehicles as power storage facilities.

Therefore, for example, the total power demand in the managed area 24 hours in advance, the total power generation in the managed area, and the total dischargeable and chargeable amounts from the storage equipment in the managed area are calculated and predicted by referring to the information stored in the various DBs mentioned above. When there is surplus power generated by the renewable energy power generation equipment 6, this is charged into the storage equipment 8 within the chargeable range of the storage equipment 8. On the other hand, when the power demand cannot be met by the power generated as planned by the conventional power generation equipment 4 and the power generated by the renewable energy power generation equipment 6 that is generating power in parallel, it is possible to discharge the power from the storage equipment 8 within the dischargeable range of the storage equipment 8 to supply the power demand.

At this time, some economic benefit is given to the user/owner of the power storage facility 8 for utilizing the facility as described above.

In order to provide some economic benefit to the user/owner of the power storage facility 8 for the aforementioned use of the power storage facility 8, the unit price of the discharge fee paid to the user/owner for the aforementioned discharge from the power storage facility 8 is set higher than the unit price of the charging fee charged to the user/owner for the aforementioned charging to the power storage facility 8.

For example, by setting the unit price of charging at 30 yen per kWh and the unit price of discharging at 50 yen per kWh, users and owners of the energy storage equipment 8 can expect to gain economic benefits by incorporating the energy storage equipment 8 they use and own into the power management system of the present invention.

The conventional power generation equipment allowable power reduction prediction calculation means 107 calculates a unit conventional power generation equipment allowable power reduction prediction, which is the amount of power generation reduction that can be tolerated by each of the multiple conventional power generation equipment 4 for each of the specified time units in the future, and also performs processing to calculate a conventional power generation equipment total allowable power reduction prediction, which is the total amount of power generation reduction that can be tolerated for each of the specified time units in the future for the multiple conventional power generation equipment 4 as a whole.

The calculated unit conventional power generation equipment allowable power reduction forecast and the calculated conventional power generation equipment total allowable power reduction forecast are associated with the time information at which the power demand forecast calculation means 100 calculated the unit load equipment power demand forecast and the load equipment total power demand forecast, and are accumulated and stored in the conventional power generation equipment allowable power reduction forecast DB 218.

The conventional power generation equipment allowable power generation increase calculation means 108 calculates a unit conventional power generation equipment allowable power generation increase forecast, which is the allowable power generation increase for each of the plurality of conventional power generation equipment 4 for each of the predetermined time units in the future, and also calculates a conventional power generation equipment total allowable power generation increase forecast, which is the total allowable power generation increase for each of the plurality of conventional power generation equipment 4 for each of the predetermined time units in the future.

The calculated unit conventional power generation equipment allowable power increase forecast and the calculated conventional power generation equipment total allowable power increase forecast are associated with the time information at which the power demand forecast calculation means 100 calculated the unit load equipment power demand forecast and the load equipment total power demand forecast, and are accumulated and stored in the conventional power generation equipment allowable power increase forecast DB 219.

The above-mentioned charge/discharge amount calculation means 104 can be configured to refer to the conventional power generation equipment total allowable power generation reduction forecast and the conventional power generation equipment total allowable power generation increase forecast when calculating the above-mentioned total discharge amount forecast or total charge amount forecast.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-mentioned embodiments, and various modifications are possible within the technical scope as understood from the description of the claims.

Claims (6)

a power demand forecast calculation means for calculating a unit load equipment power demand forecast, which is a power demand for each predetermined time unit in the future for each of a plurality of load equipments being managed, and for calculating a load equipment total power demand forecast, which is a power demand for each predetermined time unit in the future for the plurality of load equipments as a whole;
a conventional power generation facility power generation forecast calculation means for calculating a unit conventional power generation facility power generation forecast, which is the amount of power generation planned for each of a plurality of conventional power generation facilities being managed for each of the predetermined time units in the future at the time when the power demand forecast calculation means calculates the unit load facility power demand forecast and the load facility total power demand forecast, and for calculating a conventional power generation facility total power generation forecast, which is the sum of the amount of power generation planned for each of the predetermined time units in the future for the entire plurality of conventional power generation facilities;
a renewable energy power generation forecast calculation means for calculating a unit renewable energy power generation facility power generation forecast, which is the amount of power generated by each of a plurality of renewable energy power generation facilities that are managed for each of the predetermined time units in the future at the time when the power demand forecast calculation means calculates the unit load facility power demand forecast and the load facility total power demand forecast, and for calculating a renewable energy power generation facility total power generation forecast, which is the total amount of power generated by all of the plurality of renewable energy power generation facilities for each of the predetermined time units in the future;
a chargeable/dischargeable amount calculation means for calculating a dischargeable amount and a chargeable amount of each of a plurality of power storage facilities under management as a unit chargeable/dischargeable amount prediction for each of the predetermined future time units based on information regarding a dischargeable amount and a chargeable amount of each of a plurality of power storage facilities under management at a time point when the power demand forecast calculation means calculates the unit load equipment power demand forecast and the load equipment total power demand forecast;
and a charge/discharge amount calculation means for calculating a total discharge amount, which is the entire amount of power supplied from the plurality of power storage facilities to the plurality of load facilities, for each of the specified time units in the future, based on the load equipment total power demand forecast, the conventional power generation equipment total power generation forecast, the renewable energy power generation equipment total power generation forecast, and the total chargeable/dischargeable amount forecast, or for calculating a total charge amount, which is the entire amount of power supplied from the plurality of renewable energy power generation facilities to the plurality of power storage facilities, as a total charge amount prediction. 2. The power management system according to claim 1, further comprising: a charge/discharge fee calculation means for calculating a total discharge fee which is a total of discharge fees to be paid to a plurality of owners of the power storage facilities who own the plurality of power storage facilities according to the total discharge amount, or for calculating a total charging fee which is a total of charging fees to be charged to the plurality of owners of the power storage facilities according to the total charging amount. The power management system according to claim 2, wherein the charge/discharge amount calculation means further calculates a unit discharge amount discharged from each of the power storage facilities or a unit charge amount charged to each of the power storage facilities. 4. The power management system according to claim 3, wherein the charge/discharge fee calculation means further calculates, in accordance with the unit discharge amount, a unit discharge fee which is a discharge fee to be paid to the owner of the power storage equipment who owns the power storage equipment for which the unit discharge amount has been calculated, or calculates, in accordance with the unit charge amount, a unit charging fee which is a charging fee to be charged to the owner of the power storage equipment who owns the power storage equipment for which the unit charge amount has been calculated. The power management system of claim 4, in which the unit discharge charge unit price, which is the unit price of the unit discharge charge, is set higher than the unit charge charge unit price, which is the unit price of the unit charge charge. a conventional power generation equipment allowable power reduction prediction calculation means for calculating a unit conventional power generation equipment allowable power reduction prediction, which is an allowable power reduction amount for each of the plurality of conventional power generation equipment for each of the predetermined time units in the future, and for calculating a conventional power generation equipment total allowable power reduction prediction, which is a total of an allowable power reduction amount for each of the plurality of conventional power generation equipment for each of the predetermined time units in the future;
and a conventional power generation equipment allowable power increase calculation means for calculating a unit conventional power generation equipment allowable power increase forecast, which is an allowable power increase for each of the plurality of conventional power generation equipment for each of the predetermined time units in the future, and for calculating a conventional power generation equipment total allowable power increase forecast, which is a total of an allowable power increase for each of the plurality of conventional power generation equipment for each of the predetermined time units in the future,
The power management system according to claim 1 , wherein the charge/discharge amount calculation means refers to the conventional power generation equipment total allowable power generation reduction prediction and the conventional power generation equipment total allowable power generation increase prediction when calculating the total discharge amount prediction or the total charge amount prediction.

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