摘要
为解决中低压系统中开关柜电弧光故障对电力安全生产及人员安全的危害,分析了开关柜弧声、弧光产生的原理及特征,研究了弧光电流与金属性短路电流的大小关系及时域特征,提出了开关柜快速电弧光保护方案。该方案采用弧声、弧光及电流作为弧光故障判据,且判据可根据运行工况灵活设置。考虑到传感器安装后的检修,该方案还包含了传感器的自检功能。试验表明,该方案能够可靠、快速地切除开关柜电弧光故障。
In order to mitigate the hazard of arc- flash faults of switchgear in medium- voltage and low- voltage systems to electricity production and personnel safety,the principle and characteristics of arc sound and arc flash are analyzed,time domain features and relationship between arc current and bolt- fault current are also discussed,then a high- speed arc- flash protection approach is proposed.This approach adopts arc-sound,arc-flash and arc-current as protection criteria,which can be set according to the operating conditions flexibility.For easily maintenance,arc-sound sensor and arc-flash sensor self- check functions are considered.The reliability and rapidity of the approach has been verified by experiments.
作者
沈宇龙
夏成林
郄朝辉
周劭亮
SHEN Yulong;XIA Chenglin;QIE Zhaohui;ZHOU Shaoliang(NARI Group Corporation,State Grid Electric Power Research Institute,Nanjing 211106,China;NARI Technology Co.,Ltd.,Nanjing 211106,China;State Key Laboratory of Smart Grid Protection and Control,Nanjing 211106,China)
出处
《自动化仪表》
CAS
2020年第7期20-24,共5页
Process Automation Instrumentation
关键词
开关柜
弧光故障
电弧光
弧声
弧光电流
弧光回路自检
弧光保护
传感器
Switchgear
Arc-flash fault
Arc-flash
Arc-sound
Arc-flash current
Arc-flash channel self-check
Arc-flash protection
Sensor
