±500kV直流输电线路大截面导线耐张线夹断裂原因分析  

Reason Analysis of Strain Clamp Fracture of Large Cross-section Conductor in ±500 kV HCDC Transmission Line

作　　者：袁震 陆文叁 覃平 黄集贤 吴正树 王元军 YUAN Zhen;LU Wensan;QIN Ping;HUANG Jixian;WU Zhengshu;WANG Yuanjun(Nanning Bureau,CSG EHV Power Transmission Company,Guangxi Nanning 530021,China)

机构地区：[1]中国南方电网有限责任公司超高压输电公司南宁局,广西南宁530021

出　　处：《广西电力》2018年第2期32-36,共5页Guangxi Electric Power

摘　　要：针对一起±500kV直流输电线路大截面导线耐张线夹钢芯断裂事件进行分析。通过外观检查、金相组织检验、物相分析、耐张线夹铝管渗水试验及交、直流温升腐蚀试验等,发现了该耐张线夹钢芯断裂失效原因。最后,为了防止类似事件再次发生,提出了相应的建议。A strain clamp steel core fracture event of large cross-section conductor in±500 kV HVDC transmission line is analyzed.The reason of the strain clamp steel core fracture is found by appearance inspection,metallographic examination,phase analysis,water seepage test of aluminum tube of strain clamp and AC/DC temperature rise corrosion test and so on.Finally,corresponding suggestions are proposed to avoid similar events happening again.

关 键 词：直流输电 大截面导线 耐张线夹 断裂 

分 类 号：TM751[电气工程—电力系统及自动化]