针对雷达电源工作时产生的谐波电流对电网污染严重的情况，提出了采用并联型有源电力滤波器来抑制雷达电源工作时产生的谐波电流。首先分析了并联型有源电力滤波器的工作原理和基于傅里叶变换理论的谐波电流检测算法；然后介绍了采用二重化方案设计的主电路以及相应控制电路，最后给出了实验结果。实验证明，无论雷达电源工作在稳态还是脉动方式，并联型有源电力滤波器能有效抑制其工作时产生的谐波。

As the harmonics pollution is serious when the radar power supply works, a shunt active power filter is used to eliminate it. Working principle of shunt active power supply filter as well as the harmonic detection algorithm based on DFT are analyzed. Then multiple main circuit and digital-analog control circuit are introduced. Finally, experimental results are given. The experimental results show that the shunt active power filter can effectively eliminate the harmonic produced by radar power.

TN713 TN86