Article(id=1308454746969366755, tenantId=1146029695717560320, journalId=1146123302524792850, issueId=1308454712513156008, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1672-6073.2026.04.018, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1757174400000, receivedDateStr=2025-09-07, revisedDate=1767542400000, revisedDateStr=2026-01-05, acceptedDate=null, acceptedDateStr=null, onlineDate=1789889521591, onlineDateStr=2026-09-20, pubDate=null, pubDateStr=null, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1789889521591, onlineIssueDateStr=2026-09-20, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1789889521591, creator=13701087609, updateTime=1789889521591, updator=13701087609, issue=Issue{id=1308454712513156008, tenantId=1146029695717560320, journalId=1146123302524792850, year='2026', volume='39', issue='4', pageStart='1', pageEnd='197', issueExtLink='null', onlineDate='null', pubDate='1786291200000', pubDateStr='2026-08-10', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1789889513376, creator='13701087609', updateTime=1789889839088, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1308456079029986178, tenantId=1146029695717560320, journalId=1146123302524792850, issueId=1308454712513156008, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1308456079029986179, tenantId=1146029695717560320, journalId=1146123302524792850, issueId=1308454712513156008, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=153, endPage=160, ext={EN=ArticleExt(id=1308454748739363044, articleId=1308454746969366755, tenantId=1146029695717560320, journalId=1146123302524792850, language=EN, title=Dynamic Distribution and Protection Methods of Stray Current Under Sectional Insulation Deterioration in Running Rails, columnId=1152669335454658940, journalTitle=Urban Rapid Rail Transit, columnName=Academic Discussion, runingTitle=null, highlight=null, articleAbstract=

To address the problem of elevated stray current caused by insulation deterioration in running rail sections of urban rail transit, which seriously endangers the safety of the traction power supply system and surrounding underground metallic structures, this paper investigates the dynamic distribution patterns of stray current and corresponding protection methods under such insulation deterioration. First, a high-insulation protection scheme for urban rail line sections is designed, and a stray current mitigation strategy for high-insulation sections is proposed, which includes the installation of unidirectional conducting devices and the definition of high-insulation zones. Then, a multi-train dynamic operation simulation model of the urban rail power supply system is established under section insulation deterioration, taking into account the sectional protection control characteristics of the return system. A unified chain-type system model and a power flow solution are developed accordingly. Finally, based on the parameters of an actual domestic urban rail transit line, simulations are performed to analyze the dynamic distribution of stray current and rail potential along the entire line under section insulation deterioration, and the control effectiveness of sectional protection for both stray current and rail potential is evaluated. The results show that insulation deterioration in a section leads to rail potential clamping and an increase in stray current in that section. By adopting sectional protection, which isolates the return current from outside the section while maintaining high insulation within the section, the stray current amplitude in the section can be significantly suppressed, and the rail potential clamping problem induced by insulation deterioration is effectively resolved. The proposed methods can be applied to stray current protection for critical sections of urban rail lines.

, authors=Yan Zheng¹, Zixuan Zheng², Guifu Du², Chuancang Ding², Xingxing Jiang², Shunming Li¹, authorsList=Yan Zheng, Zixuan Zheng, Guifu Du, Chuancang Ding, Xingxing Jiang, Shunming Li, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1308454749100073189, articleId=1308454746969366755, tenantId=1146029695717560320, journalId=1146123302524792850, language=CN, title=走行轨区段绝缘劣化时杂散电流动态分布及防护方法研究, columnId=1152669335668568445, journalTitle=都市快轨交通, columnName=学术探讨, runingTitle=null, highlight=null, articleAbstract=

针对城市轨道交通走行轨区段绝缘劣化导致的杂散电流升高，且严重影响系统供电安全及周边地下金属工程安全的问题，开展走行轨区段绝缘劣化时杂散电流动态分布规律及防护方法研究。首先，对城轨线路区段高绝缘防护系统进行方案设计，提出线路高绝缘区段的杂散电流防护方法，设置单向导通装置及高绝缘区段；然后，建立城轨供电系统区段绝缘劣化情况下多列车动态运行仿真模型，并考虑回流系统分区段防护控制特性，进行系统统一链式建模及潮流求解；最后，基于国内实际城市轨道交通线路参数，仿真分析区段绝缘劣化时全线杂散电流及钢轨电位的动态分布，并研究分区段防护对线路杂散电流及钢轨电位的控制效果。研究结果表明，区段绝缘劣化会导致该区段钢轨电位钳位、杂散电流增加；采用分区段防护，隔离区段外的回流电流并在区段内采用高绝缘，能够大大限制区段内杂散电流幅值，同时有效解决区段绝缘劣化导致的钢轨电位钳位问题。相关方法可用于城轨线路关键区段的杂散电流防护。

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郑艳，女，硕士，讲师，主要从事交通装备状态监测及控制方向研究，zyteamo@163.com

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