The disturbance accommodating control for variable-pitch variable-speed wind turbine speed regulation

A disturbance regulation feedback loop is added to state space controller in order to adapt the wind disturbances for wind turbine control systems, and a robust wind turbine speed controller is designed. The dynamic performance of wind turbine speed regulation is improved and mechanical loads are alleviated by proper design of the state-space feedback and DAC feedback parameters. The simulation results verified the performance as expected. Through the comparison with state-space control strategy, the DAC strategy shows the lower influence and smaller impact in random wind disturbances with smaller static error, and optimized pitch output frequencies. The control system also shows robustness in the whole wind speed range above rated.