Abstract
Generally, the battery is built with wind power generator to level the output power fluctuation of wind power generator, since output power fluctuation of wind power generator is large. However, if large battery is installed in power system, the capital cost for wind power system will increase. Hence, the smallest size of battery should be determined to save the capital cost.This paper evaluates the effect of the output power leveling by introducing battery, and optimal size of battery is determined. A generated power output of a wind generator is easily calculated by real wind speed data only. However, battery charge/discharge actions are changed by control parameters for battery, it is difficult to decided the optimum battery system capacity. In this paper, output power fluctuation of wind power generator with battery system is calculated and estimated, so that the power output deviation is less than specific value, then minimum capital cost is decided by optimum battery capacity. The proposed technique determines the optimum size and control parameters for installed battery.
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