Output power curtailment control of variable-speed variable-pitch wind turbine generators

Based on analyzing of the full-range wind power curtailment control (WPCC) operation characteristics, a novel WPCC (N-WPCC) strategy is proposed in this paper. The corresponding controller is presented, which consists of a rotor speed controller, a torque controller, a pitch angle and its compensation controller. Theoretical analysis and simulation results show that, through giving priority to the torque control than the pitch regulation compared with the traditional WPCC, N-WPCC can effectively decrease the pitch angle regulation frequency and amplitude, thus to extend its operating life, and can also improve the power generation to some extent because of taking the full advantage of the vast rotational inertia of turbines. In addition, output power and rotor speed are the control inputs for the proposed method, without the need of the wind speed.