Power Quality Enhancement of Grid Connected Doubly-Fed Induction Generator Using Sliding Mode Control

Abstract

In this paper, we present a simulation study of a wind system with a doubly fed induction machine driven by a variable pitch wind turbine. The objective of the work is to design a control algorithm based on the sliding mode control strategy allowing the control of both active and reactive power independently. The main goal achieved by the control strategy is to control the amount of active and reactive power produced by the doubly fed induction generator and injected in the main grid according to the power references derived from turbine’s mechanical power and the grid operator. The simulation results have shown good performances concerning the tracking of the references both in transient and steady state. A comparative study between the proposed control strategy and the well known vector control strategy has been carried out and has shown the superiority of sliding mode control to track the given references.