Robust Controller Design for IG Driven by Variable-Speed in WECS Using μ-Synthesis

This paper presents robust controller design for a wind-driven induction generator system using structured singular value ( -synthesis) method. The controller was designed for a static synchronous compensator (STATCOM) and a variable blade pitch angle in a wind energy conversion system (WECS) in order to achieve the required voltage and mechanical power control. The results indicated that this controller offers satisfactory damping characteristics for closed loop systems. Effects of various system disturbances on dynamic performance of the WECS were evaluated in this study by a time domain nonlinear simulation and compared with the output feedback controller. The proposed designed controller showed to be more effective in regulating the load voltage and stabilizing the generator rotating speed for WECS.