摘要
为了探明10 kV线路雷击断线机理,提高配电网系统可靠性,笔者从理论与试验两方面分析了雷击断线机理。建立了雷击断线过程中多物理场耦合数学模型,分析了热、电、磁、力等相互作用对雷击断线过程的影响。搭建了10 kV线路雷击断线试验平台,进行了雷击击穿点分布特性实验,并通过雷击放电电弧等离子体诊断和电弧形态演变过程分析了雷击断线内部微观机理。通过文中的研究工作得到以下结论:雷击闪络位置主要位于绝缘子附近100~200 mm处;仿真模型应根据供电位置不同建立两种模型,当供电位置在左侧时,0.03 s后弧根在一点稳定燃烧,可能发生断线故障。文中的研究工作为10 kV线路雷击断线防护提供可参考的依据。
In order to ascertain lightning-caused breaking mechanism of 10 kV overhead transmission lines and improve the liability of distribution network system, in this paper, from 2 aspects of the simulation and experimental research,the lightning-caused breaking mechanism are analyzed.A mathematical model of multiple physical field coupling during lightning-caused breaking is established.The influence of interaction of heat, electricity, magnetism and force on the course of lightning-caused breaking is analyzed.The 10 kV line lightning test platform is built,the lightning breakdown point distribution test is carried out, and the arc plasma discharge diagnosis and arc shape evolution process,micro mechanism of internal lightning are analyzed.The simulation and test results show that lightning flashover position is in the insulator near 100-200 mm. According to the power supply position,two kinds of simulation models are established.When the power supply position on the left side, arc root is steady combustion at a position after 0.03 s,then lightning-caused breaking fault may occur. Therefore,the paper provides the basis for the lightning-caused breaking protection of 10 kV overhead transmission lines.
作者
高源
孙学东
张喆
葛国伟
廖敏夫
张永生
李红高
GAO Yuan SUN Xuedong ZHANG Zhe GE Guowei LIAO Minfu ZHANG Yongsheng LI Honggao(State Grid Tieling Power Electric Supply Company, Liaoning Tieling 112000, China School of Electrical Engineering, Dalian University of Technology, Liaoning Dalian 116024, China)
出处
《高压电器》
CAS
CSCD
北大核心
2017年第8期129-133,共5页
High Voltage Apparatus
基金
国家自然科学基金(51277020
51477024
51337001)
中央高校基本科研业务专向基金(DUT15ZD234)~~
关键词
雷击断线
击穿点分布特性
闪络电弧演变
lightning-caused breaking
distribution characteristic of breakdown point
evolution process of flashover arc
