一起500kVGIL绝缘子炸裂故障分析  

Analysis of a 500 kV GIL Insulator Burst Fault

作　　者：吴德贯[1] 彭翔[1] 李红元[1] 余忠田[1] 周禹[1] 龙方宇[1] 

机构地区：[1]中国南方电网超高压输电公司检修试验中心,昆明650217

出　　处：《电瓷避雷器》2016年第1期40-43,共4页Insulators and Surge Arresters

摘　　要：对发生在某换流站的一起500 kV气体绝缘金属封闭输电线路(GIL)支撑绝缘子炸裂故障进行分析,结合解体检查、仿真计算和对绝缘子内部缺陷产生原因及网内类似故障的分析,明确了绝缘子内部存在气泡或气隙为此次故障发生的原因,对出厂试验和交接试验发现绝缘件内部微小缺陷有效性差的问题,建议增加X射线探伤试验。An burst fault of 500 kV GIL insulator which occurs in a converter station is analyzed in this paper. Based on disassembly inspection, simulation calculation and analysis of internal defects of insulator and some similar faults in the system, the reason of the fault has been found is that the insulator has internal bubbles or air gaps. Moreover, aiming at the problem of internal micro defects of insulation are found by factory and handover tests have poor effectiveness, and additional X-ray flaw detection test is proposed.

关 键 词：气体绝缘金属封闭输电线路 绝缘子 炸裂故障 内部缺陷 X射线探伤 

分 类 号：TM75[电气工程—电力系统及自动化] TM216[一般工业技术—材料科学与工程]