Frequency regulation strategies for energy storage

The development of wind power has impact on the stability of power system. In this paper, the influence of wind power on the system frequency is studied firstly. Energy storage has the potential to provide the frequency regulation service. Two strategies of frequency regulation by energy storage are proposed then. The limit of SOC is considered in strategy one which uses model based on PI closed loop power control. The storage two divides the demand of adjustment into three areas, it can reduce the utilisation time of storage effectively. Simulations on a two-area interconnected power system with wind power have indicated the effectiveness of the proposed methods.