Coordinated Control of Hybrid Energy Storage System in the Microgrid

In allusion to the output power fluctuation of intermittent energy source in the wind-solar-micro-storage microgrid system, a coordinated control based on the hybrid energy storage system of microgrid and the power distribution between battery and super capacitor (SC) is established. In view of the power management and energy distribution between the battery and SC two energy storage units, the output of fuzzy control of present charging/discharging capability of the hybrid energy storage system is utilized. Target power value is determined firstly, according to the battery and SC charged state synthetically, the deviation value beyond the target power value is allocated according to the fuzzy control theory between the two kinds of energy storage medium. The effectiveness of the proposed strategy is validated by results of the case study.