中国电机工程学报2025，Vol.45Issue(10)：4077-4089,中插33,14.DOI:10.13334/j.0258-8013.pcsee.232819
配电线路雷击断线过程中的交流电弧侵蚀研究
Research on AC Arc Erosion During Lightning Disconnection of Distribution Lines
摘要
Abstract
Lightning-induced conductor breakage accidents in distribution lines severely threaten power supply quality and grid safety.As arc discharge is the direct cause of such failures,in-depth investigation of its erosion characteristics is crucial for revealing the mechanism of lightning-induced conductor damage.This study investigates the erosion effects on conductors caused by two typical lightning-induced arcs in 10 kV systems:single-phase grounding fault arcs(low current)and three-phase short-circuit fault arcs(high current).A laboratory platform simulating 10kV single-phase grounding faults is established to conduct low-current arc erosion experiments.Additionally,a simulation model for high-current arc erosion under phase-to-phase short-circuit conditions is developed to analyze the conductor degradation effects.Results indicate that low-current arcs produced by lightning-initiated single-phase grounding faults cause conductor strand breakage sustained action for 40 minutes,a duration shorter than the maximize permissible operating time threshold for such faults in distribution networks.High-current arcs from phase-to-phase short circuits exhibit intensified conductor erosion with increasing arc length and current magnitude.A high-current arc with a 5 kA peak can completely melt the conductor within 91 ms,which is shorter than the typical instantaneous trip protection operation time of distribution circuit breakers.关键词
配电线路/雷击断线/电弧侵蚀Key words
distributing line/lightning wire breaking/arc erosion分类
信息技术与安全科学引用本文复制引用
周桐,杨庆,罗庆亮,王科,王地陆..配电线路雷击断线过程中的交流电弧侵蚀研究[J].中国电机工程学报,2025,45(10):4077-4089,中插33,14.基金项目
国家自然科学基金项目(52477136).Project Supported by National Natural Science Foundation of China(52477136). （52477136）
