一种基于双窗宽滑动滤波的i_p-i_q谐波检测算法  

An i_p-i_q Harmonic Detection Algorithm Based on Double-window Width Moving Filters

作　　者：李强[1] 王博强 王子豪 LI Qiang;WANG Boqiang;WANG Zihao(College of Automation and Information Engineering, Xi’an University of Technology, Xi’an 710048, China)

机构地区：[1]西安理工大学自动化与信息工程学院

出　　处：《电力电容器与无功补偿》2019年第3期23-28,共6页Power Capacitor & Reactive Power Compensation

基　　金：陕西省科技统筹创新工程计划项目(2012KTCG01-13)

摘　　要：为了减小在负载突增条件下对谐波电流检测的影响,提出了一种在 ip-iq检测模型中基于双滑动平均滤波算法的谐波检测方法。建立了滑动平均滤波器的数学模型,推导出 dq 变换后谐波的存在形式,进而指出双滑动滤波方法在谐波检测上的优越性。利用 SIMULINK 搭建了无谐波和有谐波情况下的负载过零投切模型,对电网负荷投入时主干线路上的谐波电流进行了仿真。结果表明,采用双滑动平均滤波法提高了谐波电流检测的快速性并保证了稳态时谐波电流检测的精度,适应动态兼稳态过程,增强了系统的鲁棒性和抗干扰能力。In order to reduce the influence of sudden increase of load on harmonic current identification,in this paper,a kind of harmonic detection method based on ip-iq model with double moving average filters algorithm is proposed. The mathematical model of moving average filter is established;the existenceform of harmonic after dq transformation is deduced,thus pointing superiority of double moving filtering method on the harmonic detection. The SIMLINK is used to set up load zero switchingmodels with and without harmonic condition,and the harmonic current on the trunk line in the switching of grid network is simulated. It is shown by the result that the use of double moving average filter improves the fast performance of the harmonic current detection and assures the accuracy of harmonic current detection,which can adapt to dynamic and steady state process and enhance system robustness and reliability.

关 键 词：谐波电流检测 ip-iq检测模型 双滑动平均滤波算法 有源电力滤波器 

分 类 号：TM761[电气工程—电力系统及自动化]