Second order sliding mode control Of permanent-magnet synchronous wind generator for direct active and reactive power control

This paper proposes a new direct power control (DPC) for wind turbine system driven by permanent synchronous generator (PMSG) in order to track maximum absorbable power in different wind speeds. The desired optimum power is determined for per wind speed by lookup table. Then new direct power control (DPC) employs second order sliding mode(SOSM) nonlinear controller for robust control of active and reactive power and obtaining maximum power from wind turbine. Also constant switching frequency and required pulse for converters is achieved by using space vector modulation (SVM). Simulation results on 5.7-kw wind turbine are provided. Results show that the proposed controller has low error for tracking maximum power in presence wind speed variation.