摘要
低气压下污秽绝缘子的电气性能相对清洁绝缘子将降低,但气压对绝缘子串直流污闪特性的影响,目前仍缺乏系统的研究。本文对7片串XP—160盘形悬式绝缘子和特高压复合绝缘子短样的直流污闪特性进行了研究,分析表明绝缘子串直流污闪放电过程中局部电弧的特性决定气压影响特征指数n,不同型式绝缘子串n值存在差异的原因是放电过程中局部电弧飘弧造成的。
The electrical performance of polluted insulator string may reduce under low air pressure,whereas no reasonable answer about how air presssure effects on DC pollution flashover performance of insulator string is put forward by now.The paper experimental researches on the DC pollution flashover characteristics of seven units of XP-160 and short sample of compostie insulator to be used in UHV transmission lines.It is shown that the exponent n describing the air pressure influence on DC pollution flashover voltage depends on the characteristic of partial arc by the analysis in theory and the main reason that makes the n of insulators different is the partial arc fluttering degree difference for insulators.
出处
《电工技术学报》
EI
CSCD
北大核心
2010年第5期38-43,共6页
Transactions of China Electrotechnical Society
基金
国家重点基础研究发展计划(973项目)(2009CB724503)
重庆大学青年骨干教师创新能力培育基金资助项目
关键词
气压
直流
绝缘子串
污闪特性
Air pressure
DC
insulator string
pollution flashover performance
