摘要
绝缘子污闪特性的研究主要集中在悬垂Ⅰ型、Ⅱ型、Ⅴ型布置的瓷、玻璃绝缘子,对水平耐张布置绝缘子的污闪特性研究较少,为此在1970m高海拔试验基地分别试验研究了水平耐张布置和悬垂Ⅰ型复合绝缘子和长棒形瓷绝缘子2种直流绝缘子人工污秽闪络特性的影响。结果表明:布置方式对绝缘子直流污闪特性影响不同;在不同污秽程度下,复合绝缘子悬垂Ⅰ型布置的均匀升压法,直流污闪电压比水平布置时高3.9%～9.3%;长棒形瓷绝缘子水平耐张布置的恒压升降法直流污闪电压比Ⅰ型布置时高2.76%～26.1%。最后用高速摄影机拍摄了绝缘子放电发展过程,探讨了2种布置方式对复合绝缘子与长棒形瓷绝缘子直流污闪特性不同影响规律的原因。
The insulator＇s pollution flashover performances under DC voltages are relied on porcelain and glass insulators with different suspension modes such as single link suspension（Ⅰ-shape）,double link suspension（Ⅱ-shape）,and Ⅴ-shape.The pollution flashover performances of insulators with horizontal tension arrangement are hardly researched.Consequently,DC pollution flashover experiments are carried out on composite and long rod porcelain insulators with horizontal tension and vertical Ⅰ-shape suspensions at a high altitude（1970 m）.The results show that two suspension modes of the insulators have a different influence on the DC pollution flashover performance for two kind of insulators.Under every tested pollution degree,the DC pollution flashover voltages of the composite insulator strings with vertical Ⅰ-shape are 3.9% to 9.3% higher than those of horizontal strings,while the DC pollution flashover voltages of the long rod porcelain insulator strings with horizontal tension arrangement are 2.76% to 26.1% higher than those of the vertical Ⅰ-shape string.The arcing behaviors on two kind of insulator surfaces are investigated via a high speed camera,PCI-2000S.The pictures show that two arrangement modes have a different influence on the DC pollution flashover performance of the composite insulators from that of the long rod porcelain insulators.Finally,the reasons are discussed.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2011年第1期34-39,共6页
High Voltage Engineering
基金
国家重点基础研究发展计划(973计划)(2009CB724507)
国家"十一五"科技支撑计划(2009BAA23B02)
中央高校基本科研业务费专项资金项目(2009ZZ0008)~~
关键词
高海拔
悬垂绝缘子串
耐张绝缘子串
直流污闪特性
复合绝缘子
长棒形瓷绝缘子
high altitude
suspension insulator string
tension insulator string
DC pollution flashover performance
composite insulators
long rod porcelain insulators
