摘要
放电电弧是造成高压电缆接头发生火灾事故的重要原因,为确保电缆线路安全稳定运行,研究电缆接头的放电电弧特性具有实际意义。采用磁流体动力学模型,对高压电缆接头放电电弧特性进行了仿真分析,基于该模型计算了时变的电弧电导率等物性参数,进而得到了不同短路电流下的故障电弧电压,以及绝缘电弧击穿通道内的等效热损耗。以此为基础,对不同短路电流情况下的故障电弧能量特性及其变化规律进行研究,获得负载特性与故障电弧能量间的规律性关系,也给高压电缆线路故障电弧针对性防治提供了参照。
Discharge are is an important cause of fire accidents in high-voltage cable joints.To ensure the safe and stable operation of cable lines,it is of pradical significance to study the discharge arc characteristics of cable joints.Magneto-hydrodynamics model is used to simulate the discharge are characteristics of high voltage cable joints.Based on this models physical parameters such as time-varying are conductivity are calculated,and then the fault are voltages under different short-circuit currents and insulated are strike of equivalent heat loss in the passageway are obtained.On this basis,the fault are energy characteristics under different short-circuit current conditions arc analyzed and discussed,and the regularity relationship between the load characteristics and the fault are energy is obtained,which provides reference for targeted prevention of are faults in high-voltage cable lines.
作者
仇炜
崔江静
黄顺涛
梁振
杨鑫
QIU Wei;CUI Jiangjing;HUANG Shuntao;LIANG Zhen;YANG Xin(Zhuhai Power Supply Bureau of Guangdong Poewer Co.,Ltd.,Zhuhai 519000,China;College of Electrical and Information Engineering,Changsha University of Science and Technology,Changsha,410114,China)
出处
《电气应用》
2019年第12期62-68,共7页
Electrotechnical Application
基金
国家自然科学基金青年基金项目(项目编号：51407013)
广东电网有限责任公司珠海供电局2017年重点资助项目
