直流电压下GIS内部缺陷检测  

Detection for GIS Inner Defects by DC Voltage

作　　者：杨卓[1] 谭向宇 王达达 王科 赵现平 彭晶 

机构地区：[1]云南电网公司,云南昆明650011 [2]云南电力试验研究院(集团)有限公司电力研究院,云南昆明650217

出　　处：《广东电力》2014年第2期70-72,共3页Guangdong Electric Power

摘　　要：在传统脉冲电流法的基础上,设计了直流电压下脉冲电流检测系统。通过施加直流电压和交流电压,对气体绝缘金属封闭开关设备(gas insulated metal enclosed switchgear and controlgear,GIS)内部缺陷的局部放电信号进行检测。直流电压和交流电压下局部放电信号特征对比结果表明,直流电压下局部放电起始电压较交流电压下低,直流检测技术可以高效、准确地检测缺陷局部放电。On the basis of traditional pulse current method, this paper introduces design of pulse current detection system by direct current voltage. By inflicting DC and alternative current, it detects partial discharge signal of inner defects in gas insu- lated metal enclosed switchgear. Comparison result of characteristics of partial discharge signals indicate that the partial dis- charge initial voltage by DC is lower than by AC. That is to say that DC detection technology is able to efficiently and cor- rectly detect partial discharge of defect.

关 键 词：气体绝缘金属封闭开关设备 局部放电 交流 直流 

分 类 号：TM835.4[电气工程—高电压与绝缘技术]