基于TS模糊加权的风电机组变桨距的双模切换优化控制

传统的PID变桨距控制策略存在转速波动较大、变桨的跟随性差等不足。以风速在额定风速以上时,使风力发电机的输出功率稳定在额定功率为研究目标。针对变桨系统的惯性与延迟导致控制过程动态调节时间长、超调量大等问题,提出了基于T-S模糊加权的模糊与PID双模切换优化变桨距控制策略。以Simulink为试验平台,搭建了永磁直驱风力发电机组的变桨控制模型。通过仿真验证表明,所提方法具有模糊控制与PID控制两者的优点,控制输出的桨距角精度更高、响应速度更快、功率更加靠近发电机输出的额定功率。

Variable Pitch Double Mode Switching Optimal Control ofWind Turbines Based on TS Fuzzy Weighted

The traditional PID variable pitch control strategy had large fluctuant rotation speed and low following features of the pitch angle. It was focused that the output power of the wind turbine was stable at rated power above the rated wind speed. For the inertia and delay of the variable pitch system, the problem of long dynamic adjustment time and large amount of overshoot are caused in the control process. A TS fuzzy weighted dual mode pitch control strategy based on PID control and fuzzy control was presented. The directdrive variable pitch PM wind turbine simulation model has been built with Simulink, through the simulation verification. The result showed that this method had the advantages of fuzzy control and PID control, had the accuracy of pitch angle higher and the response speed faster, so that the power of generator was more closed to rated power.