Proportional Integral Resonant controller for current harmonics mitigation in a wind energy conversion system

This paper presents the tuning and simulation of a Proportional Integral Resonant (PIR) controller for the rotor side converter of a grid connected wind energy conversion system (WECS) based in a doubly fed induction generator and a back to back converter. The purpose of the resonant part of the PIR controller is to compensate the current harmonics in the stator of the generator due to grid voltage distortions, while the PI component deal with the typical control objectives of the rotor side converter like active and reactive power control. The case of study is a test rig based in a 372 W doubly fed induction generator, and the considered grid voltage harmonics components are fifth and seventh. Simulations implemented in PSIM are carried out to evaluate the current harmonics compensation with the selected PIR.