This application is a National Stage Entry of PCT/JP2019/003578 filed on Feb. 1, 2019, which claims priority from Japanese Patent Application 2018-090731 filed on May 9, 2018, the contents of all of which are incorporated herein by reference, in their entirety.

TECHNICAL FIELD

The present invention relates to a control apparatus, a power management system, a control method, and a program, and more specifically, to a control apparatus, a control method, and a program for charging/discharging plan of an energy storage system connected to a power system.

BACKGROUND ART

Patent Documents 1 and 2 disclose a technology for managing energy storage systems of a plurality of power consumers and for performing charging/discharging in accordance with various energy services.

Patent Document 1 discloses a technology for causing the energy storage systems of a plurality of power consumers to perform charging/discharging in order to regulate a frequency of the power system. Specifically, Patent Document 1 discloses a power control system including a central load dispatching office, storage battery supervisory control and data acquisition (SCADA), and a local charging/discharging system (a local charging/discharging apparatus/an energy storage apparatus).

The central load dispatching office creates a charging/discharging gain line at a predetermined cycle and transmits the result to the storage battery SCADA. The storage battery SCADA computes a sharing coefficient of each local charging/discharging system based on the charging/discharging gain line received from the central load dispatching office at a predetermined cycle, and transmits the result to each local charging/discharging system. The local charging/discharging system detects a frequency deviation in a predetermined cycle and computes an output command value based on the detected frequency deviation and the sharing coefficient. Then, the local charging/discharging system outputs the power according to the computed output command value.

Patent Document 2 discloses a technology for causing the energy storage system of each of a plurality of power consumers to perform charging/discharging in accordance with a plurality of energy services. Specifically, a control method for controlling an energy storage system connected to the power system is disclosed. The control method includes a step of determining at least two different energy services for operating the energy storage system, a step of determining a priority of the two different energy services based on predetermined criteria, a step of operating the energy storage system so as to provide a total power for performing the two different energy services to the power system from the energy storage system if the energy storage system is operated to perform the two different energy services in parallel, a step of reducing the power providing for performing the energy service having lower priority among the two different energy services in order to regulate the total power to be within a power limit if the total power is not within the power limit of the energy storage system.

RELATED DOCUMENT

Patent Document

[Patent Document 1] International Patent Publication No. WO2015/037654

[Patent Document 2] Japanese Patent No. 5789794

SUMMARY OF THE INVENTION

Technical Problem

As disclosed in Patent Document 2, the energy storage system can be more effectively used by causing the energy storage system of each of the power consumers to perform charging/discharging in accordance with a plurality of energy services. However, in the technology disclosed in Patent Document 2, the charging/discharging output of the energy storage system is determined by taking only a current state into consideration. Therefore, it may be difficult to perform charging/discharging so as to respond to a plurality of energy service requests (charging/discharging, reserving the remaining capacity, and the like.). For example, when it is desired to discharge in accordance with a certain energy service, there may be a situation in which the remaining capacity of the energy storage system is insufficient.

Similarly, in the technology disclosed in Patent Document 1 also, since the charging/discharging output of the energy storage system is determined by taking only a current state into consideration, it is difficult to solve the problems described above.

An object of the present invention is to compute a charging/discharging plan for a plurality of energy storage systems so as to respond to a plurality of energy service requests.

Solution to Problem

According to the present invention, there is provided a control apparatus that includes:

a remaining capacity change model determination unit that determines a remaining capacity change model that estimates a temporal change of a remaining capacity which is based on charging/discharging in accordance with a first energy service for each of a plurality of energy storage systems that perform charging/discharging in accordance with energy services; and

an operation planning unit that computes a charging/discharging plan of each of the plurality of energy storage systems based on the remaining capacity change model of each of the plurality of energy storage systems.

In addition, according to the present invention,

there is provided a power management system that includes: the control apparatus; and an energy storage system that performs charging/discharging based on a charging/discharging plan determined by the control apparatus.

In addition, according to the present invention,

there is provided a control method executed by a computer, the method includes:

a remaining capacity change model determination step of determining a remaining capacity change model that estimates a temporal change of a remaining capacity which is based on charging/discharging in accordance with a first energy service for each of a plurality of energy storage systems that perform charging/discharging in accordance with energy services; and

an operation planning step of computing a charging/discharging plan of each of the plurality of energy storage systems based on the remaining capacity change model of each of the plurality of energy storage systems.

In addition, according to the present invention,

there is provided a program that causes a computer to functions as:

a remaining capacity change model determination unit that determines a remaining capacity change model that estimates a temporal change of a remaining capacity which is based on charging/discharging in accordance with a first energy service for each of a plurality of energy storage systems that perform charging/discharging in accordance with energy services; and

an operation planning unit that computes a charging/discharging plan of each of the plurality of energy storage systems based on the remaining capacity change model of each of the plurality of energy storage systems.

Advantageous Effects of Invention

According to the present invention, it is possible to compute charging/discharging plans for a plurality of energy storage systems so as to respond to a plurality of energy service requests.

