基于自适应滤波器的电力谐波检测  

Power harmonic detection based on adaptive filter

作　　者：曹雷 张立广[1] 贾红敏 Cao Lei;Zhang Liguang;Jia Hongmin(College of Electronic Information Engineering, Xi'an Technological University, Xi'an 710021, China)

机构地区：[1]西安工业大学电子信息工程学院

出　　处：《电子测量技术》2019年第16期138-142,共5页Electronic Measurement Technology

摘　　要：为了对电网中的电力谐波进行检测,采用基于三相瞬时无功功率理论的ip-iq算法进行电力谐波的检测,并使用自适应滤波器作为算法中所需的低通滤波器来提取电流中的直流分量,同时将检测结果与使用巴特沃斯低通滤波器时的检测结果进行比较,最后根据检测原理建立仿真模型,进行仿真。仿真结果表明,与使用传统的巴特沃斯低通滤波器相比,检测的快速性得到了提高,同时通过比较基波电流THD指标可知检测的准确性也得到了提升。因此,所提方法能够成功检测出电力谐波,达到了预期目的。In order to detect power harmonic in the power grid, the ip-iq algorithm based on three-phase instantaneous reactive power theory is used to detect power harmonics, and an adaptive filter is used as low-pass filter needed in the algorithm to extract the DC component in the current, the results obtained when using Butterworth low-pass filter are compared with the results obtained when using adaptive filter at the same time, finally, the simulation model is built according to the detection principle, and the simulation is performed. The results show that the rapidity of the detection is improved compared to using the trad让ional Butterworth low-pass filter and the accuracy of the detection is also improved by comparing fundamental current THD. So the method can detect power harmonic successfully and the intended purpose is achieved.

关 键 词：电力谐波 检测 ip-iq算法 自适应滤波器 巴特沃斯滤波器 

分 类 号：TN98[电子电信—信息与通信工程]