LPV based direct-driven permanent magnet synchronous wind power system controller design

The direct-driven permanent magnet synchronous wind power system has high mechanical oscillation, when the generator is controlled to maximize the efficiency of captured wind energy. To solve these problems, the wind speed is distributed to low frequency and high frequency parts, and it is based on multi-time scale of wind speed and frequency separation principle. The low frequency part of the system still adopts PI control, and for the high frequency part, this paper establishes LPV model and designs gain varying controller based on the model, The controller can compensate mechanical torque and decrease mechanical oscillation efficiently. The simulation results show that the controller reduces the overshoot of mechanical torque, and enhance the system reliability.