Fuzzy Controlled DFIG WIND System with Battery for Low and High Frequency Components in Generation system

Abstract

Over the past 20 years the concern over renewable energy resources is increasing due to limited conventional resources and increased pollution. In India, 16.8 % of power is contributed by wind energy and with the technological advances there is a good scope of increasing the power contributed by wind energy. However, the wind generators when integrated to the grid have adverse effects which lead to the reduction in power quality. Many researchers have proposed different techniques to maintain the voltage quality at the PCC by controlling the reactive power. Instead of controlling the reactive power, an energy storage system can be used to control the voltage .A control strategy for managing the demand – generation fluctuations using a hybrid energy storage system in a wind-dominated remote area power supply system consisting of a DFIG, a battery storage system, a super capacitor, a dump load and main loads. Operation of battery storage system is coordinated with a super capacitor with a view to improving the performance of the battery. In this regard, the battery storage system is connected to the load side of the RAPS system, whereas the super capacitor is connected to the dc bus of the back – to – back converter of the DFIG. The project emphasizes on the application of hybrid energy storage systems to mitigate the effect of wind speed fluctuations with fuzzy controller, thereby ensuring smooth power output as well as improving the power quality at the PCC.