Power Fluctuation Reduction Using Battery System In DFIG Based Wind Energy Conversion System

Abstract

Wind energy conversion system (WECS) is the most popular renewable energy resource. This paper discusses about the usage of a battery in a grid interfaced doubly fed induction generator (DFIG) system for power smoothing. Battery energy storage system (BESS) is introduced into de-link to avoid power variation due to varying nature of wind. Thevenin equivalent model of the lead acid battery is employed in this work. Active power is maximized by using rotor side converter (RSC) controller. Grid side converter (GSC) is used to obtain unity power factor operation and constant output power. The performance of the proposed system is verified by simulating in MATLAB