基于配电线路单相接地故障主动信号定位法的晶闸管研究  

Thyristor Research Based on Single Phase Ground Fault Location Method of Power Distribution Line

作　　者：陈磊[1,2,3] 詹跃东[1] 田庆生 CHEN Lei;ZHAN Yue-dong;TIAN Qing-sheng(Faculty of Information Engineering and Automation, Kunming University of Science and Technology;EPRI Postgraduate Workstation of Yunnan Power Grid Company, Kunming University of Science and Technology;Yunnan Power Testing and Research Institute (Group)CO.,Ltd.)

机构地区：[1]昆明理工大学信息工程与自动化学院 [2]昆明理工大学云南电网有限责任公司电力科学研究院研究生工作站 [3]云南电力试验研究院(集团)有限公司

出　　处：《化工自动化及仪表》2019年第7期565-570,共6页Control and Instruments in Chemical Industry

基　　金：国家自然科学基金项目(51667012)

摘　　要：鉴于配电网单相接地故障时电气量变化特征不明显的现象,基于主动信号故障定位法,通过研究晶闸管参数,来精确控制扰动信号的大小和时长,从而克服灵敏度问题,提高定位精度。从扰动电流信号计算和晶闸管起始导通角设计两方面研究晶闸管参数,然后进行晶闸管触发模式波形验证、信号强度验证、晶闸管导通角控制误差和可控电流扰动装置动作情况4个试验。结果表明:晶闸管的有效调控可以使产生的扰动电流强度足够大,能够被有效检测,又不会引起保护装置跳闸和其他电能质量问题。In view of the single-phase grounding fault of the distribution network and the change characteristics of the electric quantities are not obvious.In this paper,based on the active signal fault location method,the parameters of the thyristor were studied to precisely control both size and length of the disturbance signal so as to overcome the sensitivity and improve the positioning accuracy.Studying the parameters of thyristor in two aspects of the disturbance current signal calculation and thyristor initial conduction angle design was implemented,including four tests to verify the thyristor's triggered mode waveform,the signal strength,the thyristor's conduction angle control error and the controlled current disturbance device operation,etc.The test results show that,the effective control of the thyristor can make the disturbance current generated strong enough and can be effectively detected without causing the protection device tripping and other quality problems of electrical energy.

关 键 词：单相接地故障 配电网线路 主动信号故障定位法 晶闸管起始导通角 扰动信号 扰动电流强度 

分 类 号：TH862.7[机械工程—仪器科学与技术]