风力发电网侧PWM整流器控制系统设计

摘要

In order to realize the two-way flow of energy, raise the power factor, improve the disturbance of the control system sinusoidal input current and make the input current sinusoidal, a new control method is presented by analyze the mathematical model. It uses the sliding-mode variable structure control as the voltage loop and current feed-forward dcoupled control algorithm as the current-loop and by using SVPWM control to enhance the control of direct current generatrix,the digital control system based on TMS320F2812 chip is designed.The experimental results show that the control system realizes two-way flow of energy and unit power factor, can effetely restrain current harmonic,has good dynamic and static performance.%为实现能量的双向流动,提高功率因数的可控性及整流器控制系统的抗干扰性,使输入电流正弦化,通过对三相PWM整流器数学模型的分析,提出一种新型的电压电流双环控制策略,即电压外环采用滑模变结构控制策略,电流内环采用前馈解耦控制策略,并通过SVPWM控制环节提高对直流母线电压的控制.设计了以TMS320F2812型DSP为核心的PWM整流器数字控制系统,并进行实验研究,结果表明,该系统实现了能量双向流动和单位功率因数,有效抑制了电流谐波,具有良好的动静态性能.