机电工程技术2025，Vol.54Issue(11)：104-108,5.DOI:10.3969/j.issn.1009-9492.2025.11.019
基于断路器特性的辅助变流器二倍过流保护策略研究
Research on Double Overcurrent Protection Strategy for Auxiliary Converters Based on Circuit Breaker Characteristics
刘呈宏 1龚程翔 1吴连贵 1周帅 1易滔 1饶东杰 2廖壬彪 1罗嗣棂 1宋森1
作者信息
- 1. 株洲中车时代电气股份有限公司,湖南 株洲 412001
- 2. 中车株洲电力机车研究所有限公司,湖南 株洲 412001
- 折叠
摘要
Abstract
Auxiliary converter is a critical component of the auxiliary power supply system in rail transit vehicles.Its primary function is to power auxiliary loads such as air conditioning and air brake compressors.The double overcurrent fault in auxiliary converters represents a typical failure mode in auxiliary power systems.Some faults exhibit sporadicity,making troubleshooting time-consuming,labor-intensive,and inefficient.Such faults can compromise passenger comfort and even jeopardize train operational reliability,posing significant impacts.Based on an urban metro line auxiliary converter in China,cause analysis is carried out on its double overcurrent protection triggers before the load protection circuit breaker trips under short-circuit conditions.A testing platform integrating auxiliary converter and circuit breaker is established.Test results verify that the tripping time of the S203M-D63 circuit breaker is less than 8 ms.Based on the characteristics of this circuit breaker,a coordinated protection strategy is developed for the auxiliary converter:(1)Implementing an 8 ms delay after double overcurrent protection signal activation before self-protection;(2)Instantaneous protection activation when bridge arm current exceeds 1 250 A.Test results also demonstrate that this software strategy enables rapid and precise fault localization and isolation of short-circuit loads,significantly enhancing the power supply reliability of auxiliary systems.The solution has been successfully implemented and promoted in China's metro market.关键词
辅助变流器/二倍过流保护/桥臂过流保护/辅助供电系统/断路器脱扣Key words
auxiliary converter/double overcurrent protection/bridge arm overcurrent protection/auxiliary power supply system/circuit breaker tripping分类
信息技术与安全科学引用本文复制引用
刘呈宏,龚程翔,吴连贵,周帅,易滔,饶东杰,廖壬彪,罗嗣棂,宋森..基于断路器特性的辅助变流器二倍过流保护策略研究[J].机电工程技术,2025,54(11):104-108,5.
