Mitigation of Wind Power Fluctuation by Combined Use of Energy Storages with Different Response Characteristics

Abstract

This paper presents a method to deal with the fluctuation problems caused by large-scale wind power integration to a distribution power system. Two types of energy storage devices which have different response characteristics and costs - EDLC (Electrical Double Layer Capacitor) with extremely high response, long life cycle but costly and Secondary Electrical Battery with relatively low response and low cost, are considered for the purpose of mitigation of fast wind power fluctuation and power leveling, respectively. Digital simulations with a typical wind farm distribution power system model are conducted in this study, and these simulation results have illustrated the validity of the combined use of these energy storage systems.