一起GIS母線開裂故障原因分析
李玥1,孫濤2
(1 國網(wǎng)蘭州供電公司,甘肅 蘭州 730050;
2 國網(wǎng)甘肅省電力公司電力科學研究院,甘肅 蘭州 730050)
摘 要:針對一起330 kV GIS母線開裂故障,介紹了故障經(jīng)過及現(xiàn)場檢查情況。從GIS母線設備應力計算、伸縮節(jié)調(diào)節(jié)尺寸、故障母線殼體法蘭材料檢驗等方面進行分析,得出此次設備故障原因是設備滑動支撐結構設計不合理,殼體和伸縮節(jié)法蘭連接的螺栓緊固力矩不均勻,導致殼體法蘭圓周方向變形量不同,使法蘭局部產(chǎn)生應力集中以及伸縮節(jié)選型不當?shù)热矫嬉蛩鼐C合作用,引發(fā)了母線殼體被拉裂的故障。
關鍵詞:GIS設備;滑動支撐;伸縮節(jié)
中圖分類號:TM595 文獻標識碼:B 文章編號:1007-3175(2019)02-0035-04
Failure Analysis of a Case of Gas Insulated Switchgear Busbar Cracking
LI Yue1, SUN Tao2
(1 State Grid Lanzhou Power Supply Company, Lanzhou 730050, China;
2 Electric Power Research Institute of Gansu Province Electric Power Company, Lanzhou 730050, China)
Abstract: Aiming at a case of 330 kV gas insulated switchgear (GIS) busbar cracking failure, this paper introduced the process of failure and on-site inspection conditions and carried out analysis from the aspects of GIS busbar equipment stress calculation, expansion joint regulation size, failure busbar shell flange material examination etc to obtain that this time the cause of equipment failure is due to the unreasonable structure design of equipment sliding support and asymmetry bolt-on force of shell and expansion joint flange connections, so as to lead to the different peripheral direction deflection, to make the flange part stress concentration and to select the improper type of expansion joints etc synthesized action of three factors, which caused the failure of busbar shell cracking.
Key words: gas insulated switchgear equipment; sliding support; expansion joint
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