Analysis and performance evaluation of DFIG and PMSG based wind energy systems

Abstract

Wind energy generation systems are confronted with growing demands for power quality and active power control. With the advances in power electronics technology, the quick growth of variable speed WECS is now witnessed. This paper explains the control of a grid tied wind energy conversion system (WECS) using Doubly Fed Induction Generator (DFIG) with partial scale converter and Permanent Magnet Synchronous Generator (PMSG) with full scale converter. Modeling of control strategies for both systems are explained clearly. The maximum power point extraction of the wind turbines along with unity power factor operation of the system is also presented. The comparison aims to present the aspects of power quality (PQ) at the point of grid connection, harnessed power from both WECS at various wind velocities and converter ratings. Vector control strategy is being in employment for both the systems. Maximum power point tracking (MPPT) has also been implemented to extract maximum available power for a given wind velocity in both the systems. The performance comparison of both systems with the control strategies are presented using MATLAB/SIMULINK.