Abstract
This paper presents a direct power control (DPC) of a single voltage source converter (VSC)-based doubly fed induction generator (DFIG) for wind energy conversion system (WECS) without using a rotor position sensor. The proposed control algorithm performs independent control of both stator active and reactive powers by selecting the appropriate voltage vectors of the RSC (Rotor Side Converter). In this method, stator flux position in the rotor reference frame is estimated from the stator flux and the slip angle. In this algorithm, the rotor position sensor is eliminated and a position sensorless algorithm is used for estimating the rotor position. Simulation and experimental results of a 3.7 kW DFIG system are presented to demonstrate the performance of the proposed WECS under steady state and dynamic changes in real power, reactive power and wind speed. For the validation of the control algorithm, the proposed algorithm is also applied on installed high rating DFIG-based WECS.
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