Comparison of VF controlled wind energy system based on different sensing methods

Abstract

This paper presents control strategies of voltage and frequency controller (VFC's) for an isolated asynchronous generator for wind energy system. Magnitude of voltage and frequency changes because of changing load and because of wind speed variation. The main confront in operation of isolated asynchronous generators are to provide unobstructed electricity with synchronized frequency and voltage under variation in consumer load and wind speeds. The capability of VFCs are established to authenticate its operation as a neutral current compensator, phase balancer, load balancer and an active filter with a VFC. Therefore, different control strategies with an improved voltage and frequency controller together with an energy storage system is used to make voltage constant and frequency constant at different load and different wind speed. It has been observed that control strategy with estimation has surpassed the performance of control strategy without estimation in terms of less requirement of current sensors.