Enhancement in dynamic and LVRT behaviour of an EFOC controlled DFIG with integrated Battery Energy Storage System

Over the next few decades non-conventional wind energy will be a great contribution to the increased power demand. Hence to provide a good quality and reliable power even after severe short circuit faults, the system should resume its normal state besides ensuring dynamic stability, according to respective wind grid codes of the nation. Wind grid codes include Low Voltage Ride Through (LVRT) behavior and Reactive power demand at fault duration as major features. The present Doubly Fed Induction Generator (DFIG) wind turbine would better achieve its grid codes with Enhanced Flux Oriented Control (EFOC) in Rotor Side Converter (RSC) and enhance its dynamic behavior with integrated Battery Energy Storage System (BESS) at dc link capacitor. The paper aims at improving LVRT and dynamic characteristics of the system and provides a comparison between with and without BESS during symmetrical and asymmetrical grid faults.