一种减少变桨动作的风机有功功率控制算法

Wind turbine active power control algorithm for pitch regulation reduction

传统风电机组采用PID功率控制算法,仍存在变桨频繁的缺点。为进一步减少机组变桨动作,文中提出一种改进的风电机组有功功率控制算法,用于进一步减少机组的变桨动作。在分析风电机组功率特性的基础上,得到风电机组的变桨非工作区,设计了考虑变桨非工作区的转速偏差补偿器,最终完成机组的有功功率控制。在仿真平台上,通过一台5 MW风电机组,对比文中所提算法、传统PID控制算法和变速变桨协同功率控制算法。仿真结果表明:文中所提算法满足风电机组的MPPT(maximum power point tracking)和限功率控制要求,同时可进一步有效减少变桨动作,具有工程实用性好的优点。

There is a disadvantage of frequency pitch regulation with the traditional coordinate PID power control.In order to reduce the pitch regulation,this paper proposes a wind turbine active power control algorithm.A pitch inactive zone was obtained by analyzing the power characteristic of wind turbine,and a compensator of rotor speed error was designed based on the pitch inactive zone,to complete the wind turbine active power control.At last,the proposed active power control,the traditional PID control and the power control method coordinating the rotor speed and pitch angle regulation were compared by a 5 MW wind turbine in a simulation platform.The simulation results show that the proposed control algorithm can satisfy the wind turbine goal of MPPT(maximum power point tracking)and power limit control,reduce the pitch regulation,and be easily used in engineering.