HPF(高通滤波器)检测高次谐波和无功电流改进方法的研究

基于瞬时无功功率理论对应用HPF（高通滤波器）检测高次谐波电流和无功电流的方法进行了简要分析，提出了一种改进型的检测方法，进行了理论上的验算，利用MATLAB软件对检测技术进行了仿真研究。仿真结果表明：该方法比常用的LPF（低通滤波器）的谐波检测分离方法具有更好的检测实时性；并注意到了利用HPF谐波电流检测电路无法得到被检测电流的全部谐波电流成分，必须在谐波检测结果中补偿零序电流。理论分析和仿真结果都证明了该方法的正确性。

Study on Rectified Method of Detecting High-order Harmonics and Reactive Current Based on HPF

Based on the theory of instantaneous reactive power, a rectified detecting method is analyzed with which instantaneous current and high frequency harmonies can be detected,then verified theoretically ,and with the help of MATLAB software, computer simulation studies are made for the detecting technology. The simulation results suggest that the technology is more efficient in many aspects than other detecting methods such as based on low pass digital filter. At the same time, it has been noticed that the harmonic current detecting circuit applying HPF cannot detect all of the harmonic components of detected currents, so the neutral harmonic currents should be compensated in the harmonic current detecting results. The proposed method has been proved to be correct in theoretical analysis and simulation results.