【摘要】 在风力机空气动力学特性分析的基础上 ,讨论了变速恒频风力机组变桨距机构在低于额定风速阶段和高于额定风速阶段的不同控制策略。将模型与控制方法相结合的数字仿真表明 ,控制曲线与预期要求一致。具体设计了变桨距机构液压控制方案和电机控制方案 ,并提出了高油压冗余式电液比例变桨距机构的设计思路。更多还原

【Abstract】 Based on research of wind turbine aerodynamic characteristics, this paper analyzed various control methods for a pitch-controlled system of variable-speed and constant-frequency wind turbine at a wind velocity range higher or lower its speed rating respectively. The simulation results are identical with what expected. The two schemes those are the hydraulic control and the electromotor control of the pitch-controlled system were developed and a high pressure redundancy electro-hydraulic proportional pitch-controlled design was put forward.更多还原