摘要
随着近年来电网冰雪灾害频发,超高压线路进行了融冰改造,虽然取得了良好的抗冰效果,但在改造后的运行过程中发现了不容忽视的地线锈蚀隐患。针对某500 k V交流输电线路地线融冰改造后出现的地线外表面和连接线夹处存在不同种金属接触产生的地线锈蚀情况,通过锈蚀产物X射线衍射分析(X-ray diffraction,XRD)、金相分析、盐雾试验分析等试验,详细分析了锈蚀产生的原因,提出了切实可行的整治措施,并计划在现场运用实施,对于今后输电线路地线融冰改造具有重要的借鉴意义。
Due to the frequent occurrence of ice and snow disasters in power grid, ice-melting reconstruction is carried out for more and more EHV lines. Good anti-icing effect has been obtained, but the ground wire corrosion which cannot be ignored has also been detected during operation after ice-melting reconstruction. Aiming at the corrosion caused by different kinds of metal contacting between the outside surface of ground wire and the connecting clamp of a 500 kV AC transmission line after ice-melting reconstruction, XRD analysis of corrosion product, metallographic analysis, salt spray test and some other experiments are made in this paper and the reasons of corrosion are then analyzed in detail. Finally, feasible measures for the ground wire corrosion are proposed and planned to be applied in actual site. The proposed measures are of great reference significance for future ice-melting reconstruction of transmission lines.
作者
易永亮
田应富
谭劲
陈军君
刘纯
刘泽青
YI Yongliang TIAN Yingfu TAN Jin CHEN Junjun LIU Chun LIU Zeqing(Guiyang Bureau, CSG EHV Power Transmission Company, Guiyang 550003, China Hunan Electric Power Company Science Research Institute, Changsha 410000, China State Key Laboratory of Power Transmission Equipment ＆ System Security and New Technology, Chongqing University, Chongqing 400044, China)
出处
《南方电网技术》
北大核心
2017年第4期23-29,共7页
Southern Power System Technology
关键词
超高压输电线路
地线
融冰改造
地线锈蚀
EHV iransmission line
ground wire
ice-melting reconstruction
ground wire corrosion
