一种适用于独立小容量交流电网的APF电流基准产生方法

基于通用瞬时无功功率理论，针对独立小容量电网电源内阻抗相对较大引起电压出现零序分量的情况，对APF电流基准算法进行了分析和讨论。对交叉矢量算法进行改进，在保证补偿电流与电源电压正交的条件下使补偿后的电源电流不含零序分量，完全消除三相四线系统中的谐波无功和不平衡状况。以飞机交流电网为例，通过仿真和实验给出了飞机APF在不同条件下基准电流检测的效果，证实了所提方法的正确性和实用性。

A Current Reference Generation Strategy for Active Power Filters in an Independent Low Power Utility

Based on the generalized instantaneous reactive power theory, the current reference generation strategy for active power filters in independent low power utilities is analyzed and discussed. Focus on the characteristics of the three-phase four-wire system and un-negligible inner impendence of the power utility, the relationship of zero-sequence voltage and compensation current is analyzed and deduced in the proposed method. The harmonics, reactive and the imbalance current can be detected totally under the constant active power rule even if the source voltage is imbalanced. The simulation and experimental results under different load condition of aircraft APF are provided to validate the proposed strategy.