并联型有源电力滤波器的重复学习Boost变换控制策略

An Integrated Learning Boost Converter Control Strategy for PWM-VSI Based Active Power Filter

将供电系统谐波电流的补偿应用戴维南定理等效为谐波电压源的补偿,由此提出了一种基于Boost变换技术的PWM逆变器重复学习控制策略。该控制策略一方面将逆变器视为PWM整流器,应用Boost控制方法,使系统谐波电流与等效谐波电压源形成近似单位功率因数;另一方面,采用内部模型控制将系统谐波电流直接转换形成常规PWM逆变器的控制电压,并且应用重复学习控制消除各种不确定性因素对控制品质的影响。仿真和实验结果证实该控制器适合于有源滤波器系统,并具有跟踪速度快,鲁棒性好、稳态误差小等特点。

This paper presents an integrated learning controller with constant frequency boost converter technique for PWM-VSI based active power filter (APF). In the controller, the constant frequency boost converter technique views the inverter as a boost converter to achieve the unity power factor in harmonic domain. The iterative learning control, as an internal model control, uses the active source harmonic current drawn by VSI to directly construct the control voltage of PWM inverter. The simulation and experimental results verify the viability and effectiveness of the controller.