Spring 2016, Volume7 - Number1 علمی-پژوهشی (وزارت علوم)/ISC (16 صفحه - از 35 تا 50)
In this paper a fuzzy logic based approach is presented for control of small-scale Wind Energy Conversion System (WECS) over wide operating range. The considered WECS is equipped with fixedpithblades and an Interior PM Synchronous Generator connected to a full-scale PWM rectifier. Theproposed control strategy aims to track maximum power point at underrated wind speeds and harvestrated power of generator at overrated wind speeds. The space vector modulation-based direct torquecontrol method is used to track the electrical torque and flux references. The reference of electrical torqueis provided through a Fuzzy Logic Controller (FLC) achieving the maximum power point tracking. Onthe other hand, the reference flux magnitude is provided through a comprehensive strategy guarantyingthe machine operation over nominal rotational speed, limitation of the generated reference torque andcopper-loss minimization. These are formulated as a nonlinear optimization problem which is solvednumerically offline using the well-known sequential quadratic programming method. It should be notedthat, the fuzzy rules are designed in such a way that not only result fast and accurate tracking performanceat underrated wind speeds but also avoids irrational growth in reference electrical torque when the reference torque is limited by reference flux providing strategy. The proposed control strategy is verifiedby applying the strategy to a commercial 10 kW wind turbine simulated in MATLAB/Simulink.
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- (پژوهیار, , , )