典型文献
Enhancement of Soil Discharge Channels on Potential Surrounding Buried Cables Under Impulsive Currents
文献摘要：
Substations have a large number of signal trans-mission cables beneath the ground.Both the insulation safety and signal reliability of the cables are affected severely by the electromagnetic field.Under high-amplitude impulsive currents,the dispersion of currents can cause soil discharge and thus cause unexpected distortions in an electromagnetic field.This paper focuses on the distortions of the electric field.In general,soil discharge channels occur in the vicinity of the independent rod.Closer development of the channel might enhance the electric field distribution and the potential surrounding the outer insulation of the cables(i.e.the surface potential on the cable).Therefore,this paper establishes a platform for observing the soil discharge channel and measuring the surface potential.Direction characteristic of the channel is extracted from the captured image of soil discharge channels and the surface potential is obtained by the measured coupling capacitive current on the shield experimentally.This paper also presents an improved model considering a dynamic growing discharge channel for the transient analysis of the grounding electrode.Study results show the surface potential increases as the discharge channel approaches the cable.To quantify this enhancement effect,the ratio of the highest to the lowest value of surface potential in different directions is taken as the multiple of the surface potential increase.The calculated multiples of the surface potential increase are in the range of 1 to 1.64 times under different conditions by the improved model.Therefore,taking the soil discharge channel into account is helpful to accurately analyze the impulsive interference of buried cables.
文献关键词：
中图分类号：
作者姓名：
Wenxia Sima;Xiaochuan Li;Tao Yuan;Ming Yang;Donghui Luo;Jialun Li
作者机构：
State Key Laboratory of Power Transmission Equipment&System Security and New Technology,Chongqing University,Chongqing,400044,China;State Grid Sichuan Electric Power Research Institute,Chengdu,Sichuan,610041,China
文献出处：
引用格式：
[1]Wenxia Sima;Xiaochuan Li;Tao Yuan;Ming Yang;Donghui Luo;Jialun Li-.Enhancement of Soil Discharge Channels on Potential Surrounding Buried Cables Under Impulsive Currents)[J].中国电机工程学会电力与能源系统学报（英文版）,2022(06):1794-1803
A类：
Cables,Substations
B类：
Enhancement,Soil,Discharge,Channels,Potential,Surrounding,Buried,Under,Impulsive,Currents,have,large,number,signal,mission,cables,beneath,Both,insulation,safety,reliability,are,affected,severely,by,electromagnetic,field,amplitude,impulsive,currents,dispersion,can,cause,soil,discharge,thus,unexpected,distortions,This,paper,focuses,electric,In,general,channels,occur,vicinity,independent,Closer,development,might,distribution,potential,surrounding,outer,surface,Therefore,this,establishes,platform,observing,measuring,Direction,characteristic,extracted,from,captured,image,obtained,measured,coupling,capacitive,shield,experimentally,also,presents,improved,model,considering,dynamic,growing,transient,analysis,grounding,electrode,Study,results,show,increases,approaches,To,quantify,enhancement,effect,ratio,highest,lowest,value,different,directions,taken,calculated,multiples,range,times,under,conditions,taking,into,account,helpful,accurately,analyze,interference,buried
AB值：
0.531134
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