Wind energy fuzzy power system stabilizer

A fuzzy power system stabilizer (FPSS) for a wind turbine employing a doubly fed induction generator (DFIG) is presented. The PSS signal is added at the interface of the DFIG controller and the converter, facilitating its application and implementation on any basic DFIG control scheme. The conventional design of PSS was carried out using a linearized model around the nominal operating point of the plant, which is naturally nonlinear. This limits the PSS performance and robustness. To overcome these drawbacks, we propose a new design using a fuzzy logic. The results show the effectiveness of the proposed approach. The system response is less oscillatory with a shorter transient time. The study was extended to faulty power plants.