Nonlinear control of permanent magnet wind turbine generation (PSMG)

In order to most effectively reduce the power and rotor speed´s fluctuations of wind turbine system, a new control strategy was proposed through both pitch angle control and electromagnetic torque regulation in a high wind speed region. Based on the wind turbine system´s nonlinear mathematical model, a nonlinear controller is developed using the theory of differential geometry state feedback linearization. The simulation result proves the new control strategy´s rightness and reliability. The new control strategy can effectively hold back the power and rotor speed´s fluctuation which is caused by the wind speed´s variations comparing with those traditional control strategies which only consider the pitch angle or electromagnetic torque regulation.