Control apparatus, power management system, control method, and non-transitory storage medium

1. A control apparatus comprising:

at least one memory configured to store one or more instructions; and

at least one processor configured to execute the one or more instructions to:

determine a remaining capacity change model that estimates a 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;

compute 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;

determine the remaining capacity change model that estimates an amount of change of the remaining capacity for each unit time; and

determine the remaining capacity change model for each energy storage system based on an upper lim it value of the charging/discharging in accordance with the first energy service and a record of the amount of change of the remaining capacity for each unit time which is based on the charging/discharging in accordance with the first energy service,

wherein charging/discharging of at least one of the plurality of energy storage systems is controlled based on the charging/discharging plan.

2. The control apparatus according to claim 1 ,

wherein the first energy service is a service that causes the energy storage system to perform charging/discharging within a range equal to or smaller than an upper limit value of the charging/discharging set in advance.

3. The control apparatus according to claim 2 ,

wherein the first energy service is a frequency regulation service that causes the energy storage system to perform charging/discharging according to a frequency fluctuation of a power system.

4. The control apparatus according to claim 1 ,

wherein the remaining capacity change model is a linear function or a piecewise linear function.

5. The control apparatus according to claim 1 ,

wherein the processor is further configured to execute the one or more instructions to compute the charging/discharging plan by solving a mathematical programming problem for obtaining a variable that maximizes a function representing a profit of a plurality of power consumers who own each of the plurality of energy storage systems under a constraint condition determined based on the energy services.

6. The control apparatus according to claim 5 ,

wherein the variable includes an upper limit value of the charging/discharging in accordance with the first energy service, a charging power and/or a charging energy amount in accordance with other energy services, and a discharging power and/or a discharging energy amount in accordance with other energy services.

7. The control apparatus according to claim 5 ,

wherein the profit of the plurality of power consumers is defined based on a compensation for the upper lim it value of the charging/discharging in accordance with the first energy service and a power purchasing unit price.

8. The control apparatus according to claim 5 ,

wherein the constraint condition includes “a discharging power of each of the plurality of energy storage systems at each time does not exceed a power demand of each of the plurality of power consumers who owns each energy storage system at each time”.

9. The control apparatus according to claim 1 ,

wherein the processor is further configured to execute the one or more instructions to compute the charging/discharging plan of each of the plurality of energy storage systems based on at least a part of a charging/discharging efficiency, a charging/discharging output upper limit, a charging/discharging output lower limit, a remaining capacity lower limit value, a remaining capacity upper limit value, and a current remaining capacity.

10. The control apparatus according to claim 1 ,

wherein the processor is further configured to execute the one or more instructions to compute the charging/discharging plan of each of the plurality of energy storage systems based on at least a part of a change of a power consumption predicted value, a change of an error of the power consumption predicted value, a compensation for an upper lim it value of the charging/discharging in accordance with the first energy service, a power purchasing unit price, and an upper limit value of a power to be purchased.

11. The control apparatus according to claim 1 ,

wherein the energy services include at least two of a frequency regulation service that causes the energy storage system to perform charging/discharging according to a frequency fluctuation of a power system, a backup service that keeps the energy storage system constantly charged with a predetermined power amount, a peak-cut service that causes the energy storage system to perform discharging when a power demand exceeds a threshold value, and a cost management service that determines a time for causing the energy storage system to perform charging/discharging based on a power purchasing unit price different for each time slot.

12. A control method executed by a computer, the method comprising:

determining a remaining capacity change model that estimates a 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;

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;

determining the remaining capacity change model that estimates an amount of change of the remaining capacity for each unit time; and

determining the remaining capacity change model for each energy storage system based on an upper limit value of the charging/discharging in accordance with the first energy service and a record of the amount of change of the remaining capacity for each unit time which is based on the charging/discharging in accordance with the first energy service,

wherein charging/discharging of at least one of the plurality of energy storage systems is controlled based on the charging/discharging plan.

13. A non-transitory storage medium storing a program that causes a computer to:

determine a remaining capacity change model that estimates a 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;

compute 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;

determine the remaining capacity change model that estimates an amount of change of the remaining capacity for each unit time; and

determine the remaining capacity change model for each energy storage system based on an upper limit value of the charging/discharging in accordance with the first energy service and a record of the amount of change of the remaining capacity for each unit time which is based on the charging/discharging in accordance with the first energy service,

wherein charging/discharging of at least one of the plurality of energy storage systems is controlled based on the charging/discharging plan.