基于监控信息的地铁轨道至地面绝缘退化区域定位方法

IF 2.6 3区 工程技术 Q2 COMPUTER SCIENCE, INFORMATION SYSTEMS
Aimin Wang, Yu Li, Wenxuan Yang, Guangxu Pan
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引用次数: 0

摘要

由于轨地绝缘下降,大电平直流(DC)从铁路泄漏,形成地铁杂散电流,腐蚀埋地金属。为了定位轨地绝缘劣化区域,提出了一种基于参数识别方法和监测信息(包括车站轨道电位、牵引变电所(TPS)电流、列车牵引电流和列车位置)的定位方法。根据相邻两个 TPS 的监测信息,提出了地铁线路的区段定位模型,其中测试区段的轨地电导等同于块参数。利用轨道电阻率和牵引电流作为已知信息,用最小二乘法(LSM)计算轨地电导。通过将计算出的电导与根据标准要求和区段长度确定的阈值进行比较,确定轨地绝缘劣化区段。然后,根据区段定位结果,考虑定位距离精度,提出退化区段的详细定位模型。利用遗传算法(GA)计算轨道到地面的电导,通过比较计算出的阈值与标准要求和定位距离精度,确定退化位置。通过比较不同退化条件下的计算结果,对定位方法进行了验证。此外,还分析了建议方法在不同退化长度和不同退化区段数量下的应用。结果表明,所提出的方法可以定位轨地绝缘劣化区域。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Localization Method for Insulation Degradation Area of the Metro Rail-to-Ground Based on Monitor Information
Since rail-to-ground insulation decreases, large-level direct currents (DCs) leak from railways and form metro stray currents, corroding the buried metal. To locate the rail-to-ground insulation deterioration area, a location method is proposed based on parameter identification methods and the monitored information including the station rail potentials, currents at the traction power substations (TPSs), and train traction currents and train positions. According to the monitoring information of two adjacent TPSs, the section location model of the metro line is proposed, in which the rail-to-ground conductances of the test section are equivalent to the lumped parameters. Using the rail resistivity and traction currents as the known information, the rail-to-ground conductances are calculated with the least square method (LSM). The rail-to-ground insulation deterioration sections are identified by comparing the calculated conductances with thresholds determined by the standard requirements and section lengths. Then, according to the section location results, a detailed location model of the degradation section is proposed, considering the location distance accuracy. Using the genetic algorithm (GA) to calculate the rail-to-ground conductances, degradation positions are located by comparing the threshold calculated with the standard requirements and location distance accuracy. The location method is verified by comparing the calculation results under different degradation conditions. Moreover, the applications of the proposed method to different degradation lengths and different numbers of degradation sections are analyzed. The results show that the proposed method can locate rail-to-ground insulation deterioration areas.
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来源期刊
Electronics
Electronics Computer Science-Computer Networks and Communications
CiteScore
1.10
自引率
10.30%
发文量
3515
审稿时长
16.71 days
期刊介绍: Electronics (ISSN 2079-9292; CODEN: ELECGJ) is an international, open access journal on the science of electronics and its applications published quarterly online by MDPI.
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