低通滤波器对谐波电流检测的影响分析  

Effect of Low Pass Filter on Harmonics Detection Circuit

作　　者：刘恒显[1] 王杰[1] 

机构地区：[1]上海交通大学电气工程系,上海200240

出　　处：《工业控制计算机》2013年第3期117-118,120,共3页Industrial Control Computer

摘　　要：研究了基于瞬时无功功率理论的一种谐波电流检测方法,利用MATLAB仿真软件建立相应的仿真模型,并对其中的低通滤波器关于谐波电流检测效果的影响进行了仿真研究。仿真结果表明,低通滤波器的类型、截止频率和阶数对检测电路的检测精度、动态响应具有显著的影响。通过对仿真结果的分析,低通滤波器选择截止频率为20Hz,阶数为2次就可以有效地检测谐波。The MATLAB simulation software is used to model the harmonics detection circuit,which is based on the instantaneous reactive power theory.The simulation results show that the dynamic response and the detecting precision can be greatly influenced by the cut-off frequencies,the order and the type of the low pass filter in the harmonics detection circuit.The conclusions through the analysis of the simulation results is that the low pass filter can effectively detect harmonics when choosing cut-off frequency of 20Hz and the order of 2.

关 键 词：有源电力滤波器 瞬时无功功率理论 谐波检测 低通滤波器 

分 类 号：TM935[电气工程—电力电子与电力传动] TN713.4[电子电信—电路与系统]