10kV架空绝缘导线防雷击断线用防弧金具研究  

DEVELOPMENT OF ARC-PROTECTION HARDWARE AGAINST LIGHTNING-CAUSED BREAKING OF COVERED CONDUCTORS IN 10kV DISTRIBUTION NETWORKS

作　　者：陈维江[1] 李庆峰[1] 来小康[1] 李国富[1] 蔡国雄[1] 杨力[1] 李向阳[1] 刘有为[1] 李同生[1] 王颂虞[2] 关诚[2] 陈光华[2] 董风宇[2] 王以京[2] 

机构地区：[1]中国电力科学研究院,北京100085 [2]北京供电局,北京100031

出　　处：《电网技术》2002年第9期25-28,共4页Power System Technology

摘　　要：通过分析架空绝缘导线雷击断线机理,研制出一种防弧金具.经过几百次的雷电冲击放电试验和十几次工频短路电弧试验的验证表明:在辐射形线路上距绝缘子(P-20)中心线负荷侧100~150 mm范围内安装该防弧金具,雷电过电压均在防弧金具与绝缘子钢脚之间引起闪络,接续的工频短路电流电弧的弧根固定在防弧金具上燃烧,能可靠地保护导线免于烧伤.对于环网线路,将绝缘导线由绝缘子轴线起向两侧各剥离一段绝缘层(300mm),安装上该防弧金具,在任何潮流方式下均能有效地保护导线免于烧伤.A new arc-protection hardware is studied and developed by analyzing the lightning-caused breakingmechanism of covered conductors. Over hundreds of lightning flashover tests and several times of power frequency arc tests show that when the arc-protection hardware is installed on covered transmission conductors about 100mm to 150mm from the center of the pin insulator just on the load side in radioactive network, lightning caused flashover occurs only between the hardware and the pin insulator, and the arc抯 roots of the following power frequency short circuit current will keep burning on the hardware. It is effective and feasible to prevent covered conductors from lightning-caused breaking innon-radioactive network when the arc-protection hardware are installed at covered conductors about 300mm from the center of pin insulators just on both sides of insulators and the insulation covers of conductors between two hardware should be cut off.

关 键 词：10kV架空绝缘导线 防雷击 断线 防弧金具 输电线路 

分 类 号：TM726.3[电气工程—电力系统及自动化]