Experimental evaluation on fuzzy logic switching control of electrical double-layer energy capacitor system for stability enhancement

A fuzzy logic based switching control system has been proposed for an electrical double-layer energy capacitor system (ECS) to enhance the overall stability of electric power systems. The real power flow signal at the location of the ECS is utilized to generate switching control signals for the regulation of charging or discharging power to and from the ECS. Through the proposed control, the damping of poorly damped oscillations can be highly improved. To demonstrate the efficiency of the proposed switching control, experimental studies have been performed on a 5 kVA one-machine infinite-bus laboratory system by using a 70 Wh (250 kJ) ECS.