METHOD OF CONTROLLING A BATTERY, COMPUTER READABLE RECORDING MEDIUM, ELECTRICAL POWER GENERATION SYSTEM AND DEVICE CONTROLLING A BATTERY

1 . A method of controlling a battery storing electric power generated by a power generator generating electric power using renewable energy, the method comprising:

detecting a power output data at plural points in time during a specified period, the power output data being amounts of electric power generated by the power generator;

computing a target output value for supplying to an electric power transmission system based on an average value of the power output data detected at the plural points; and

supplying to the electric power transmission system electric power corresponding to the target output value from at least one of the power generator and the battery,

wherein the average value is determined so that different weights are applied to the power output data detected at the plural points in calculating the average value.

2 . The method of claim 1 , further comprising computing a power difference between the power output data at two different points of the plural points and comparing the power difference and a predetermined first threshold value, wherein the different weights are applied to the power output data when the power difference is greater than the first threshold value.

3 . The method of claim 2 , wherein the different weights are applied to the power output data when the power difference is less than the first threshold value.

4 . The method of claim 1 , wherein the different weights are applied to the power output data such that a weight applied to the power output data at a first point is greater than a weight applied to the power output data at a second point earlier than the first point.

5 . The method of claim 2 , wherein the first threshold value is a specific proportion in respect of a rated power output of the power generator.

6 . The method of claim 1 , further comprising computing a power difference between the power output data at two different points of the plural points and comparing the power difference and a predetermined second threshold value, and supplying electric power to the electric power transmission system from the power generator without further computing the target output value, when the power difference is greater than the second threshold value.

7 . The method of claim 2 , wherein electric power is supplied to the electric power transmission system from the power generator without further computing the target output value, when the power difference is greater than a second threshold value, and the first threshold value is smaller than the second threshold value.

8 . The method of claim 2 , wherein the two different points of the plural points are consecutive points for the detection.

9 . A computer-readable recording medium which records a control programs for causing one or more computers to perform the steps comprising:

detecting a power output data at plural points in time during a specified period, the power output data being amounts of electric power generated by the power generator;

computing an average value of the power output data detected at the plural points so that so that different weights are applied to the power output data detected at the plural points in calculating the average value;

computing a target output value for supplying to an electric power transmission system based on the average value; and

supplying to the electric power transmission system electric power corresponding to the target output value from at least one of the power generator and the battery.

10 . An electric power generation system, comprising:

a power generator configured to generate electric power using renewable energy;

a battery configured to store electric power generated by the power generator;

a detector configured to acquire power output data at plural points in time during a specified perios, the power output data being the amount of electric power generated by the power generator; and

a controller configured to compute an average value of the power output data detected at the plural points so that different weights are applied to the power output data detected at the plural points in calculating the average value, to compute a target output value for supplying to an electric power transmission system based on the average value, to supply to the electric power transmission system electric power corresponding to the target output value from at least one of the power generator and the battery.

11 . A device controlling a battery storing electric power generated by a power generator generating electric power using renewable energy, comprising:

a detector configured to acquire a power output data at plural points in time during a specific period, the power output data being the amount of electric power generated by the power generator; and

a controller configured to compute an average value of the power output data detected at the plural points so that different weights are applied to the power output data detected at the plural points in calculating the average value, to compute a target output value for supplying to an electric power transmission system based on the average value, to supply to the electric power transmission system electric power corresponding to the target output value from at least one of the power generator and the battery.