电测与仪表2016，Vol.53Issue(23)：34-37,4.
基于三次谐波法的避雷器阻性电流测量方法研究
Research on detection method of MOA resistance leakage current based on third harmonic component
陈炯 1徐璐琪 1徐广鹦2
作者信息
- 1. 上海电力学院，上海200090
- 2. 上海市电力公司检修公司，上海200122
- 折叠
摘要
Abstract
The paper designs a circuit measuring resistive current , on the basis of leakage current standard waveform of the surge arrester recommended by the criterion of DL/T 987-2005.The way of current sensor interconnection is used by the system to achieve the output of leakage current , and the extraction of third harmonic of the total leakage current is realized through the technique of passing signals through bandpass filter .Then, the extraction of third har-monic is attained by the peak detection circuit , and the determination of the fundamental component is achieved through the relationship between third harmonic and fundamental wave .This paper introduces the measurement princi-ple, six-order multiple negative feedback bandpass filter and the peak detection circuit in detail .The whole circuit is constructed and measured to understand the feasibility of the designing circuit .It is the deviation between test data and input data of the designing circuit in this paper derived from the measurement result approaches 1%, which meets with the acquirement of on-site measure .Consequently , the circuit designed by the paper could achieve the measure-ment of the arrester resistive leakage .关键词
氧化锌避雷器/三次谐波法/带通滤波电路/峰值检测电路Key words
MOA/third harmonic component/bandpass circuitry/peak detection circuitry分类
信息技术与安全科学引用本文复制引用
陈炯,徐璐琪,徐广鹦..基于三次谐波法的避雷器阻性电流测量方法研究[J].电测与仪表,2016,53(23):34-37,4.
