滑动平均滤波在谐波和无功电流检测中的应用  

Application of moving average filter in harmonic and reactive current detection

作　　者：姜艳华[1,2] 王彦文[1] 

机构地区：[1]中国矿业大学(北京)机电与信息工程学院,北京100083 [2]辽宁工程技术大学机械工程学院,辽宁阜新123000

出　　处：《辽宁工程技术大学学报（自然科学版）》2014年第12期1685-1688,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：辽宁省教育厅重点实验室基金资助项目(LS2010078)

摘　　要：为改善电网电能质量,提出一种采用滑动平均滤波的无锁相环谐波和无功电流检测方法.该方法通过选择滑动窗宽度,采用移动指针的方法构建滑动平均滤波器,代替传统的低通滤波器以减小检测延时,并采用电网电压矢量的同步参考坐标变换代替锁相环以减小检测误差,利用Matlab/Simulink对负载突变的情况下进行仿真研究.结果表明:与传统检测方法相比,该方法可以更加快速而准确地检测谐波和无功电流,易于数字实现.A harmonic and reactive current detection method without phase lock loop was proposed for improving the power quality of power grid by the moving average filter. The moving average filter was constructed by moving the pointer after the selection of sliding window width instead of traditional low-pass filter in order to reduce the detection delay. Furthermore, synchronous reference frame transformation of grid voltage vector was used to replace phase lock loop to reduce the detection error. Finally, simulation about the sudden change of the load was completed by Matlab/Simulink. The results show that the method can detect the harmonic and reactive current more quickly and accurately than the traditional one, and it is easy for digital realization.

关 键 词：滑动平均滤波 并联有源电力滤波器 谐波电流 无功电流 锁相环 

分 类 号：TM76[电气工程—电力系统及自动化]