单相PWM整流器模糊多重PR控制策略的研究

To reduce input current harmonics and suppress specific low-frequency grid-side current harmonics, a fuzzy multiple proportional-resonant (PR) control strategy is proposed, overcoming the fixed-parameter limitation of conventional multiple PR control. Simulation in MATLAB/Simulink and experimental validation confirm improved THD reduction, dynamic response, and disturbance rejection.

为了降低单相PWM整流器输入电流谐波含量,并较好地抑制网侧电流中的特定低频谐波,在比例谐振PR(proportion resonant)控制基础上研究了模糊多重PR控制,以解决多重PR控制中参数恒定不变、在控制过程中无法自适应参数变化和系统扰动等不确定因素影响的问题.最后在MATLAB/Simulink上进行仿真并通过实验平台验证了该方法的有效性.结果表明,所提控制策略有效减小了网侧电流总畸变率,并在一定程度上提高了系统的动态性和抗干扰性.