Power quality improvement using active filter capability in back to back convertor installed for variable speed DFIG wind energy system

This paper presents a novel control strategy to achieve simultaneously active and reactive power generation with the addition of active filter capability to variable speed DFIG wind energy system. This presented work considers a wind power system equipped with the doubly fed induction generator and a vector controlled converter connected between the rotor and the grid. This paper presents a comparative study between conventional controller and proposed controllers, showing that power losses reduction and mitigated in current and voltage harmonic can be obtained using the addition of active filter capability to variable speed DFIG wind energy system.