有源电力滤波器谐波及无功电流检测的不必要性(二)——仿真及实验

在经理论分析得出经典有源电力滤波器(APF)中的谐波及无功电流检测不是必需的结论的基础上,推出经典APF电流控制策略与电源电流直接控制策略之间的等效关系.在经典控制方案基础上,省掉了负载和APF电流检测单元以及谐波及无功电流或基波有功电流运算单元,保留了经典APF中的电容电压控制器和电流控制器,提供了一个廉价而高性能的APF控制方案.最后对基于上述两种控制策略的APF进行了仿真研究,并用电源电流直接控制方案开发了一台单相APF实验样机.仿真和实验结果验证了理论分析的正确性.

An Investigation on the Unnecessary of Harmonic and Reactive Current Detection for Active Power Filters(Part II)——Simulation and Experiment

Based on the conclusion that it is unnecessary to detect the harmonic and reactive current in classical active power filters(APF),a direct AC main current control scheme is presented in the paper. It does not require the harmonic and reactive currents to be sensed and computed, reserves the DC capacitor voltage controller and current controller used in the classical APF, and provides a low-cost but high-performance solution for APF control. The equivalent relations between the proposed scheme and the classical scheme are obtained. The dynamic performances of the APF based on the two schemes are compared by means of simulation. The simulation results demonstrate the validity of the proposed scheme. A prototype is developed to verify the performance of the proposed APF in advance and all conclusions in Part I of the paper are well supported.