开关柜内部绝缘缺陷的检测研究  

Research on Internal Insulation Defects Detection of Switch Cabinet

作　　者：刘益岑[1] 黄忠康[2] 周志强[3] 魏良才[2] 龚奕宇[1] 鄢阳[4] 薛志航[1] 何正浩[2] 

机构地区：[1]国网四川省电力公司电力科学研究院,四川成都610072 [2]华中科技大学强电磁工程与新技术国家重点实验室,湖北武汉430074 [3]国网辽宁省电力有限公司,辽宁沈阳110004 [4]国网电力科学研究院,湖北武汉430074

出　　处：《水电能源科学》2015年第9期181-183,176,共4页Water Resources and Power

基　　金：国网四川省电力公司科技项目(5219991308DN)

摘　　要：在实际运行中,开关柜的绝缘故障和绝缘劣化主要由局部放电引起,鉴于现场运行中设备的局部放电与绝缘状态的检测技术还不成熟,提出了采用脉冲电流法测定PC值(视在放电量),TEV技术测定dB值,并利用干扰源产生的4种复合干扰来模拟实际开关柜运行中的干扰,测得了金属开关柜基于各放电点的dB-PC数据库,极大地方便了实际运用中实测暂态对地电压(TEV值)和脉冲电流(PC值)之间的转换,利用这种转换可方便地了解局部放电的情况。The insulation faults and degradation of the switch cabinet are mainly caused by partial discharge in practi cal operation. Given that the detection techniques of partial discharge and the insulation state of the field device were im mature, this paper proposed a method based on pulse current determining discharge quantity and TEV determining the value of dB. And then four kinds of compound disturbance produced by the interference sources were used to simulate the actual operation disturbance of the switch cabinet. The dB-PC database of the metal switch cabinet based discharge points were measured, which was convenient for the transformations between transient ground voltage （TEV） and pulse current （PC）, whihc was convenient to identify the partial discharge situations.

关 键 词：开关柜 局部放电 暂态对地电压(TEV) 脉冲电流法 

分 类 号：TM855[电气工程—高电压与绝缘技术]