摘要
10 kV架空线路多采用绝缘导线,但绝缘导线在遭受雷击后易发生断线事故,严重影响供电可靠性。对一起10 kV雷击断股导线的特征进行分析,总结导线断股处的基本特征;根据导线遭受雷击后的形态,从雷电过电压的产生、导线损伤的形成以及工频电弧的热效应等方面分析导线遭受雷击并发生燃弧的原因,得出绝缘导线发生断线现象是由于多重作用综合造成的。针对导致绝缘导线雷击断股断线的原因提出绝缘导线防护策略,为10 kV绝缘导线防止雷击断线事故的发生提供参考依据。
10 kV overhead conductors are mostly insulated conductors,but the insulated conductors are prone to be broken after lightning stroke,which seriously affects the reliability of power supply.Analyzes the characteristics of the 10 kV lightning strike broken strand conductor and summarizes the basic characteristics of the broken strand;according to the shape of the conductor after being struck by lightning,the causes of lightning stroke and arc generated are analyzed from lightning overvoltage,the formation of conductor damage and the thermal effect of power frequency arc.It is concluded that the breakage of insulated conductor is caused by multiple factors;furthermore,the lightning protection strategy for insulated conductor is put forward according to the causes of lightning-caused breakage of insulated conductor and broken strand.It provides references for 10 kV insulated conductor to prevent lightning break.
作者
焦夏男
易慧
廖辰川
庞志开
李水天
JIAO Xia’nan;YI Hui;LIAO Chenchuan;PANG Zhikai;LI Shuitian(Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd.,Guangzhou 510660,China)
出处
《黑龙江电力》
CAS
2023年第5期430-434,共5页
Heilongjiang Electric Power
关键词
绝缘导线
雷击断线
感应雷过电压
闪络
工频电弧
防雷设备
insulated conductor
lightning-caused breaking
induced lightning overvoltage
flashover
power frequency arc
lightning protection equipment
