Simulation of Variable-Pitch Control for Direct Drive Permanent Magnet Synchronous Wind Turbine

Abstract

当风力机运行在高风速区域时，捕获的风能超过了发电机组额定运行范围，因此，本文采用调节桨距角的方式维持发电机功率输出在额定值附近。首先介绍了变桨型风力机的特点和结构；接着针对风力发电系统非线性强的特点，提出采用模糊控制的策略实现桨距角的变换。通过分析模糊控制原理，设计自优化模糊PID控制器，并建立变桨控制仿真模型，完成与传统PID调节的对比分析。 When the wind turbines work in the high speed region, they capture more wind energy than ge-nerating units rated operating range. Therefore, in this paper, the way of adjusting the pitch angle was used to maintain generator power output in the vicinity of the rating. First of all, the paper introduces the characteristics and structure of variable-pitch wind turbine; then according to the strong nonlinear characteristics of wind power generation system, the fuzzy control strategy to realize the transformation of the pitch was proposed. By analyzing the principle of fuzzy control, the self-optimizing fuzzy PID controller is designed, and the simulation model of variable pitch control is established. And the comparison of the traditional PID regulation is accomplished.