高通和低通滤波器对谐波检测电路检测效果的影响研究

从基于瞬时无功功率理论的一种谐波电流检测方法， 推出了采用高通和低通滤波器的两种谐波电流检测电路。利用ＭＡＴＬＡＢ仿真软件建立了相应的仿真电路， 并就滤波器对谐波电流检测电路检测效果的影响进行了仿真研究， 同时对两种电路的性能进行了对比， 结果表明， 滤波器的截止频率、阶数和类型对检测电路的动态响应过程、检测精度都有很大影响。谐波电流检测电路采用低通滤波器， 无论从设计上还是从检测效果都有优势

A Study about Influence of High and Low Pass Filters on Detecting Effect of Harmonics Detection Circuits

Two circuits using high pass and low pass filters are obtained by introducing a detecting approach of harmonic currents based on the instantaneous reactive power theory Their simulation circuits are built by MATLAB simulation software,respectively The simulation studies about the influence of the filters in the detecting circuit on their detecting effect are carried out and,at the same time,the performances of two circuits are compared.The results show that the dynamic response and the detecting precision can greatly be influenced by the cut off frequencies,the order and the type of the filters,and that the circuit containing LPF is better than the one containing HPF in both design and detecting effect