滑模与PI调节三相AC/DC PWM变换器非线性控制

针对三相AC/DC PWM变换器,提出了非线性滑模直流输出电压控制和PI调节方式的输入电流调节方案.基于在同步d,q参考坐标系下的状态坐标变换,设计采用非线性滑模控制调节输出电压动态,使其跟踪线性参考模型;采用PI调节器调节d轴输入电流为零,以得到功率因数λ=1的控制.在提出的控制方案中,输出电压的瞬态动态可通过线性参考模型调节,参考模型具有理想的动态行为.实验结果验证了所提出的控制方案的有效性.

Nonlinear Control of Three-Phase AC/DC PWM Converter based on Sliding Mode and PI Regulating

In this paper,a nonlinear sliding-mode DC output voltage control and input current regulation using PI regulation for a three-phase AC/DC PWM converter are proposed.Based on the state coordinate transformed model representing the d-axis input current and output voltage dynamics in synchronous d-q reference frame,the nonlinear sliding-mode control was designed for the output voltage dynamics to track a linear reference model,and the PI regulator is designed to regulate the d-axis current to zero for unity power factor control.With the proposed control,the transient dynamics of the output voltage can be regulated through the design of a linear reference model,which has the desired dynamic behaviors.Experimental results demonstrate the validity of the proposed controller.