关键词: 滑动平均值, 变速变桨风机, 桨距角, 非线性控制, 模糊 PID, 风力发电

Abstract: The variable-speed variable pitch wind turbine in wind power generation system has poor stable operation and efficient energy conversion effect under different wind speeds, and there is fluctuation in pitch angle variation. A nonlinear pitch angle control method for variable-speed variable pitch wind turbine based on sliding average algorithm is studied. Construct a nonlinear ontology model of a variable speed variable pitch fan,and use a three-point sliding average algorithm to smooth the fluctuation of the operating power of the variable speed variable pitch fan. The smoothed power and power error of the variable speed variable pitch fan are used as input variables,and the pitch angle is defined as the output variable. Through fuzzy rules,the control parameters are continuously optimized and adjusted to optimize the control of the nonlinear pitch angle of the variable speed variable pitch fan. The experimental results show that the studied method can smooth out high-frequency noise and random fluctuations in wind speed, enabling the variable-speed variable pitch fan control system to respond faster to changes in wind speed and maintain the output power of the fan more stably near the rated value; And it makes the pitch angle change show a smooth and uniform trend, with small fluctuations and rapid response.

Key words: moving average,variable speed pitch fan,pitch angle,nonlinear control,fuzzy PID,wind power generation