组群贯通供电方式牵引变电所进线继电保护方案研究  

Research on relay protection scheme for power supply incoming line in continuous power supply system with grouped traction substations

作　　者：靳松[1] JIN Song(China Railway First Survey and Design Institute Group Co.,Ltd.,Xi'an 710043,China)

机构地区：[1]中铁第一勘察设计院集团有限公司,陕西西安710043

出　　处：《电气应用》2024年第12期75-82,共8页Electrotechnical Application

基　　金：中国国家铁路集团有限公司科技研究开发项目(SY2020G001)。

摘　　要：针对组群贯通供电,分析其牵引变电所电源进线牵引侧的故障类型和继电保护配置。对于进线牵引所侧来说,当发生各种类型短路故障时,电网侧提供的短路电流受到牵引变压器限制;通过接触网绕送的短路电流受到接触网阻抗限制,牵引侧的短路电流一般较小。进线发生各种单相和相间短路,差动保护均能启动。如果无法安装纵联差动保护,当单相牵引变压器连接在电源进线AB相间时,应配置低电压启动的A相和B相功率方向保护,其中A相功率参考正方向由牵引变压器指向进线;B相功率方向参考正方向由进线指向牵引变压器。This paper analyzes the fault types and relay protection configuration of the traction side of the traction substation power incoming line in continuous power supply system with grouped traction substations.For the traction side of the power incoming line,when various types of short circuit faults occur,the short circuit current provided by the grid side is limited by the traction transformer.The short circuit current sent through the catenary line is limited by the impedance of the overhead catenary line,and the short circuit current in the traction side is generally small.Differential protection can be started when various single and phase short circuits occur in the incoming line.If the longitudinal differential protection cannot be installed,when the single-phase traction transformer is connected to the power supply input line AB phase,the low-voltage starting phase A and phase B power direction protection should be configured,in which the positive reference direction of A-phase power is pointed to the input line by the traction transformer;The power direction of phase B refers to the positive direction from the incoming line to the traction transformer.

关 键 词：组群贯通供电系统 电源进线 继电保护方案 

分 类 号：U224[交通运输工程—道路与铁道工程]