摘要
近年来,我国楚穗、复奉、天广、高肇、兴安等多条高压直流输电线路瓷绝缘子出现铁帽电解腐蚀现象。针对国内研究人员提出安装锌环抑制铁帽电解腐蚀的构思,本文通过铁帽电解腐蚀模拟试验对所提出马蹄形锌环的保护有效性进行了验证。从锌环尺寸对抑制效果的影响角度进行了试验研究,并从铁帽外径尺寸、兜水特性等方面解释了相同尺寸马蹄形锌环对不同吨位绝缘子铁帽电解腐蚀抑制效果不同的原因。试验结果表明,马蹄形锌环能够有效抑制运行瓷绝缘子铁帽的电解腐蚀,并且相同尺寸的马蹄形锌环对帽径尺寸较大绝缘子的保护效果优于帽径尺寸较小的绝缘子。本文根据铁帽缝隙结构和模拟试验结果,对马蹄形锌环的结构尺寸进行了优化设计,并给出了其运行寿命。
Recent years, Chusui, Fufeng, Tianguang, Gaozhao, Xing'an and other. HVDC transmission lines appeared electrolytic corrosion phenomenon in China. The validity of U-shaped zinc ring to restrain caps' electrolytic corrosion is tested and verified in this paper. The influence of zinc ring size on inhibitory effect was researched with accelerated electrolytic corrosion tests, and the reason that size zinc rings with the same size had different inhibitory effects on different tonnage insulators is explained from the view of caps' curvature radius and water pocket characteristics. Test results indicate that the installation of U-shaped zinc ring is useful to the caps' electrolytic corrosion.The inhibitory effect of zinc rings with the same size on larger caps curvature radius insulator is better than smaller ones. The proposed U-shaped zinc ring size and operation life is given in this paper.
出处
《电工技术学报》
EI
CSCD
北大核心
2015年第2期220-228,共9页
Transactions of China Electrotechnical Society
基金
国家重点基础研究发展计划(973计划)(2011CB209406)
特高压工程技术(昆明
广州)国家工程实验室开放基金重点项目(EL201203
NEL201301)资助
关键词
直流
瓷绝缘子
铁帽
电解腐蚀
马蹄形锌环
结构尺寸设计
DC,porcelain insulator,caps,electrolytic corrosion,U-shaped zinc ring,structure and size design
