摘要
输配电外绝缘表面积污会导致其绝缘性能下降,产生局部放电乃至闪络,严重威胁电网安全稳定运行。而表面污秽中的可溶盐成分又对外绝缘设备电气特性有显著影响。本文以玻璃三角板为模型,研究了典型污秽成分下的交流电弧放电特性。本文借助摄像机分析了玻璃表面放电过程,并研究了不同可溶盐成分下交流电弧特性差异。研究结果表明,Ca(NO3)2成分下的沿面交流电弧的E-I特性可以表示为E=129.1·I^-0.651,CaCl2成分下的沿面交流电弧的E-I特性可以表示为E=98.4·I^-0.507,NaCl成分下的沿面交流电弧的E-I特性可以表示为E=92.3·I^-0.44。研究结果对复杂环境下输配电外绝缘的选择有一定的指导作用。
Surface contamination on external insulation of power distribution and transformation system will lower the insulation properties of the lines,which will cause partial discharge and even flashover.This is a serious threaten to the safety operation of power grid.The soluble salt constituent of the natural contaminants will also have significant effects on the electrical property of outdoor insulation apparatus.In this paper the AC arc discharge characteristics under typical pollution constituents are studied by using triangle glass plane as the sample.The surface discharge process on plane surface is analyzed by means of digital camera,and the difference of AC arc performance under different soluble salt constituents is studied.Research results indicate that,the surface arc E-I relationship under Ca(NO3)2 can be expressed by E=129.1·I^-0.651,under CaCl2 can be expressed by E=98.4·I^-0.507,while that under NaCl can be expressed by E=92.3·I^-0.44.
作者
高嵩
刘洋
高超
毕晓甜
GAO Song;LIU Yang;GAO Chao;BI Xiaotian(Jiangsu Electrical Power Research Institute,Nanjing 211102,China)
出处
《电瓷避雷器》
CAS
北大核心
2019年第6期187-191,197,共6页
Insulators and Surge Arresters
基金
国家重点研发计划:基于遥感遥测技术的特高压直流外绝缘积污特性研究及状态检测(编号:2016YFA0602003).
关键词
污秽成分
局部放电
交流电弧
泄漏电流
伏安特性
pollution materials
partial discharge
AC arc
leakage current
volt-ampere characteristics
