电测与仪表2016，Vol.53Issue(21)：115-123,9.
基于变频信号注入原理的防带地线合闸检测装置设计
Design of detector for anti-closing with grounding wire based on variable frequency signal injection principle
摘要
Abstract
Aimed at problems of temporary hanged grounding wire detection during lines maintenance or rebuilding work of distribution network in 10 kV and under the voltage grade , a detection method based on variable frequency in-jection principle was studied , and a detector device for anti-closing with grounding wire was developed based on DSP2812, and the variable voltage signal was produced and injected into the detection loop circuit , which was com-posed of detector , distribution line , grounding wire and the earth , etc.Three-phase voltage and current signals were sampled , and after conditioning , were transmitted into CPU for comprehensive analysis , which could detect the wires in three-phase , two-phase and single-phase grounding situations , as well as no grounding and inter-phase short con-nection situations .The detector was based on modular design with high speed data processing chip , and in which the FFT algorithm was used to resolve the fundamental wave and harmonic , could availably judge the useful signals , and the intensity of inductive signal existed in wires .It is proved from the field test that the vicious accident of "closing with grounding wire"can be avoided in usage of the designed detector and which has a certain reference value .关键词
检修改造/接地线/带地线合闸/变频信号注入/DSPKey words
maintenance and rebuilding/grounding wire/closing with grounding wire/variable signal injection/DSP分类
信息技术与安全科学引用本文复制引用
程乐峰,殷林飞,余涛..基于变频信号注入原理的防带地线合闸检测装置设计[J].电测与仪表,2016,53(21):115-123,9.基金项目
中国南方电网科技项目资助（ K-GD2014-204）；国家自然科学基金项目 （）
