Variable speed stand-alone wind energy conversion system using synchronous generator

Abstract

This paper deals with a synchronous generator (SG) based variable speed stand-alone wind energy conversion system (WECS). The voltage and frequency controller (VFC) consists of two back-back connected voltage source converter (VSC) and voltage source inverter (VSI) along with a battery energy storage system (BESS) at intermediate DC bus to allow the generation at variable voltage and variable frequency. The load-side VSI is controlled to feed regulated voltage and frequency supply to consumers. The performance of the VFC is obtained under steady-state and dynamic conditions. The simulation results demonstrate that the VFC performs satisfactorily as load leveler, load balancer, a neutral current compensator and as a maximum power point tracker.