Frequency regulation in microgrid using wind — Fuel cell — Diesel generator

This paper discusses a control strategy for the integration of wind turbine generators (WTGs) with fuel cells (FCs), diesel generator (DG) and electrolyzer systems for the regulation of frequency in a microgrid. By incorporating a FC system and electrolyser, the issues related to the fluctuating wind power can be minimized up to certain extend. When the wind power output is high, the surplus energy is stored as hydrogen gas after water electrolysis and during low wind speeds; the stored hydrogen is used for generating electric power using fuel cells. The DG is responsible for the overall frequency balance in the system, which is assisted by WTGs and FCs. The effectiveness of the control strategy was verified through simulations by using detailed models of WTG, FC, electrolyser, hydrogen compressor and storage tank.