A Fuzzy-PI control to extract an optimal power from wind turbine

In this article we develop the overall model of the wind energy conversion systems (WECSs) structure based on the permanent magnet synchronous generator (PMSG), and propose a study of the electrical parts (permanent magnet synchronous machine and static converter). Our study is developed on a wind conversion system in order to produce optimum power (to extract the maximal wind power). The speed control of all machine-turbine at optimal values can provide a valuable service and useful for the management and generation of power network to which the turbine is connected. The main drawback is that the WECS is highly nonlinear, and thus a nonlinear control strategy is required. An adaptive Fuzzy-PI speed controller is proposed to overcome this problem. Simulation results are given to show the effectiveness of this control strategy. Conclusions are summarized in the last section.

► We model the wind energy conversion system (WECS) based on the PMSG.
► We present the vector control of permanent magnet synchronous generator (PMSG).
► A speed control strategy is developed to extract maximal wind power.
► A Fuzzy-PI speed controller is proposed to overcome the WECS nonlinearity problem.
► Simulation results show the effectiveness of the proposed control strategy.