铁路牵引站用高压电缆金属护层接地方式探讨  

Discussion on Grounding Modes of High-Voltage Cable Metal Sheath Used in Traction Substation

作　　者：谢强 XIE Qiang(Changzhou Power Supply Branch of State Grid Jiangsu Electric Power Co.,Ltd.,Changzhou 213000,China)

机构地区：[1]国网江苏省电力有限公司常州供电分公司,常州213000

出　　处：《电线电缆》2023年第4期58-61,66,共5页Wire & Cable

摘　　要：研究了高压电缆金属护层不同接地方式对铁路牵引站供电的影响,通过对高压电缆金属护层接地方式中直接-直接接地、直接-保护接地和交叉互联接地3种主流方式进行研究,分析了各接地方式的优缺点及适用范围。综合分析铁路牵引站负荷的特殊性,研究了3种主流高压电缆金属护层接地方式对铁路牵引站用的高压电缆的影响,确定直接-保护的接地方式是最适用于铁路牵引站用高压电缆金属护层接地。研究结果可为由接地方式错误造成的铁路牵引站用高压电缆故障提供参考。The influence of different grounding modes of high-voltage cable metal sheath on the power supply of traction substation was studied,through the study of three mainstream grounding modes of high-voltage cable metal sheath including direct-direct,direct-protection and cross interconnection,the advantages,disadvantages and application scope of various grounding modes were analyzed.The particularity of the load of traction substation was comprehensively analyzed,the influence of three mainstream high-voltage cable metal sheath grounding modes on the high-voltage cable connecting traction substation was studied,and the pricipal that direct-protection grounding is the most suitable grounding method for the high-voltage cable metal sheath connecting traction substation was determined.The research results can be given to avoid the fault of high-voltage cable connecting traction substation caused by wrong grounding mode.

关 键 词：高压电缆 金属护层 接地方式 铁路牵引站 

分 类 号：TM757.2[电气工程—电力系统及自动化]