H_∞ Control Approach to Reduction of Energy Capacity of Energy Storage Systems

Abstract

This letter addresses reduction of the energy capacity of energy storage systems (ESSs) using H_∞ control theory. The ESSs have been widely used for smoothing fluctuations of wind generator outputs. We propose a direct and efficient method to design controllers that achieve the minimization considering the trade-off between the energy capacity of the ESSs and frequency variation in power systems.