电气化铁路贯通同相供电AT牵引网故障辨识与自愈技术研究  

Research on Fault Identification and Self-healing Technology of AT Traction Network with Co-phase Power Supply for Electrified Railway

作　　者：李群湛[1] 王帅 易东[1] 陈民武[1] LI Qunzhan;WANG Shuai;YI Dong;CHEN Minwu(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学电气工程学院,四川成都610031

出　　处：《铁道学报》2022年第7期46-54,共9页Journal of the China Railway Society

基　　金：中国国家铁路集团有限公司科技研究开发计划(SY2020G001);中铁第一勘察设计院集团有限公司科技项目[院科(川藏)20-34]。

摘　　要：贯通同相供电技术有效地解决了电气化铁路负序与电分相问题,但现有AT牵引网任一部件发生故障,都会导致整个系统失电,这将严重影响供电可靠性。提出一种适用于贯通同相供电系统的AT牵引网分段供电方案,实现分段内接触网与负馈线的独立测控,构建故障分段导向安全的自愈流程,保障非故障区段的正常运行,缩小事故停电范围。基于AT牵引网分段供电拓扑特征,结合列车与牵引网运行特性,提出混合判据的故障辨识方法,应用多端同步信息,实现故障区段和故障类型的准确辨识。通过Matlab/Simulink仿真,验证了分段供电方案与辨识方法的正确性和对各种故障场景的可靠性。Co-phase power supply system effectively eliminates negative sequence and removes electrical phase separation for electrified railways.However,the damage of any component in traditional AT traction network will cause the whole system interruption,which seriously disturbs the reliability of the system.In this paper,the novel segmental AT traction network is proposed,which can switch the catenary and negative feeder at each subsection on and off independently.Furthermore,the self-healing process of fault subsection is constructed to ensure the normal operation of non-faulty section.Based on the structure of segmental traction network as well as the electrical characteristics of electric multiple units and AT traction network,the hybrid fault identification method is proposed,and then the multi-terminals synchronous information is employed for the identification of faulty subsection and fault types.Case studies have verified that the scheme and the method are accurate and quite robust to various fault scenarios.

关 键 词：电气化铁路 同相供电 AT牵引网 故障辨识 

分 类 号：TM922.3[电气工程—电力电子与电力传动] U223.5[交通运输工程—道路与铁道工程]