三相电压型PWM整流器非线性解耦控制研究

Decoupled Control of Three-Phase Voltage Source PWM PFC Rectifiers based on Non-Linear System Feedback Linearization Theory

基于非线性系统反馈线性化理论,建立了三相电压型PWM整流器非线性仿射模型,推导出其对应的非线性坐标变换矩阵和非线性状态反馈矩阵,得到了三相电压型PWM整流器反馈线性化模型,提出了三相电压型PWM整流器无功功率和有功功率的解耦控制策略。对三相电压型PWM整流器解耦控制特性进行了细致分析和研究。结果表明,反馈线性化能较好地实现三相电压型PWM整流器的解耦控制。给出的试验结果验证了文中理论研究的正确性。

Based on the feedback linearization theory for nonlinear systems, a nonlinear affine model for three phase voltage source PWM PFC are presented; the corresponding nonlinear coordinate conversional matrix and nonlinear state feedback matrix are deduced out; the feedback linear model of three phase voltage source PWM PFC rectifiers are obtained and a decoupled reactive and active power control strategy of three phase voltage source PWM PFC rectifiers are proposed. Research shows that it can realize approximate decouple limited by output rectified voltage and constraint requirements for switching functions. This control scheme can realize decoupled control of the three phase PWM PFC rectifiers. Simulative and experimental results verify the correctness of the theories are correct.