跨座式单轨交通直流牵引系统故障列车识别方法  

An Identification Method of Faulty Train for a Straddle-Seat Monorail DC Traction System

作　　者：张向亮 刘永生[3] 蔡志端 王孝顺 罗四倍 单丰 祝艳华 ZHANG Xiangiang;LIU Yongsheng;CAI Zhiduan;WANG Xiaoshun;LUO Sibei;SHAN Feng;ZHUYanhua(School of Intelligent Manufacturing,Huzhou College,Huzhou Zhejiang 313000;Huzhou Key Laboratory of Green Energy Materials and Battery Cascade Utilization,School of Intelligent Manufacturing,Huzhou College,Huzhou,Zhejiang 313000;NR Electric Co.,Ltd.,Nanjing 211102;Nanjing Power Supply Company,State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing 211102)

机构地区：[1]湖州学院智能制造学院,浙江湖州313000 [2]湖州市绿色能源材料与电池梯次利用重点实验室,浙江湖州313000 [3]南京南瑞继保电气有限公司,南京211102 [4]国网江苏省电力有限公司南京供电分公司,南京211102

出　　处：《都市快轨交通》2024年第6期78-84,共7页Urban Rapid Rail Transit

基　　金：浙江省自然科学基金资助项目(LY19F030002)。

摘　　要：针对跨座式单轨交通直流牵引系统正极回路与列车车身发生短路故障危及城市轨道交通的安全运营问题,基于跨座式单轨交通直流牵引系统双边供电等值模型,分析正极回路与车体发生短路时故障列车和正常列车接地电流和负极受电电流幅值的特征差异,提出一种基于接地电流和负极受电电流幅值比较的故障列车识别方法,并通过MATLAB仿真和现场试验对所提方法进行测试。研究结果表明:即使正常列车的车体接地继电器GR等值电阻由750Ω大幅降至0.75Ω时,故障列车的接地电流幅值始终大于整定值和负极受电电流幅值,本文所提方法能够准确地识别出故障列车,验证了方法的有效性。When a short-circuit fault occurs between the positive pole of a high-voltage DC circuit for a train and its carbody inside the station in a straddle seat monorail DC traction system,this causes the carbody grounding relay(GR)of all trains inside the station to actuate and the circuit breakers of the train to trip.Meanwhile,this also triggers multiple 64D grounding protection actions and trips the circuit breaker of the DC feeder.The fault results in a loss of power to the DC traction system.It is necessary to identify the faulty train and restore the normal power supply of the DC traction system as soon as possible to reduce the impact of the accident.First,the study analyzed characteristic differences in the amplitude of the grounding current and negative receiving electricity current for a faulty train compared to a normal train when a short-circuit occurred between the positive circuit and the carbody based on the equivalence model of the DC traction bipolar power supply system for straddle monorail transportation.Second,an identification method for a faulty train is proposed based on a comparison of the grounding current and negative current amplitude.The identification procedure is activated when the grounding current exceeds a predetermined threshold.If the grounding current amplitude is greater than the negative current,the train is identified as faulty;otherwise,it is considered to be in a normal state.The accuracy and effectiveness of this method were validated through MATLAB simulations and field tests.The proposed approach is simple,practical,and highly reliable,providing a strong safeguard for the safe operation of straddle-seat monorail systems.

关 键 词：城市轨道交通 直流牵引系统 故障识别 接地电流 负极受电电流 跨座式单轨 

分 类 号：U231[交通运输工程—道路与铁道工程]