接地电流在线监测在牵引供电电缆线路上的应用  

Application of Grounding Current Online Monitoring in Traction Power Supply System

作　　者：宋克俭 王海鹏 吕宝宝 赵怡豪 SONG Kejian;WANG Haipeng;LYU Baobao;ZHAO Yihao(Luoyang Power Supply Company,State Grid Henan Electric Power Co.,Ltd.,Luoyang 471000,China)

机构地区：[1]国网河南省电力公司洛阳供电公司,洛阳471000

出　　处：《电线电缆》2024年第5期69-74,共6页Wire & Cable

摘　　要：接地电流在线监测技术在牵引供电上的应用较少,对监测效果也无法评估。将改进的电缆接地电流在线监测系统应用于牵引供电系统上,验证了接地电流在线监测技术可应用于牵引供电系统上;通过对环流异常进行判断和验证,明确了现有电力系统接地电流判定标准不能直接应用于牵引供电系统,提出初步判定特征;同时,对比牵引变电所两侧电缆负荷电流和接地电流,发现牵引电缆负荷电流会影响牵引变电所供电电缆的负荷电流,应加强对牵引变电所供电电缆的监测。Application of grounding current online monitoring technology in traction power supply is few,and monitoring effect cannot be evaluated.The improved cable grounding current online monitoring system was applied to traction power supply system to verify the operating effect of grounding current online monitoring technology.Through judgment and validation of anomalous circulating current,it was clear that the existing criteria of power system for grounding current could not be directly applied to traction power supply system,and preliminary decision characteristics were presented.At the same time,by comparing load current and grounding current on both sides of traction substation,it was found that load current of traction cable could affect load current of supply cable in traction substation.Therefore,it was necessary to strengthen the monitoring of supply cables in traction substation.

关 键 词：牵引供电 接地电流 接地方式 判定标准 

分 类 号：TM922[电气工程—电力电子与电力传动] U226[交通运输工程—道路与铁道工程]