地铁直流进线振荡电流识别算法研究  

Research on identification algorithm of oscillating current in DC incoming lines of metro

作　　者：王楠清 漆宇 忻兰苑 宋金川 田行军 WANG Nanqing;QI Yu;XIN Lanyuan;SONG Jinchuan;TIAN Xingjun(CRRC Zhuzhou Institute Co.,Ltd.,Zhuzhou,Hunan 412001,China;Tianjin Keyvia Electric Co.,Ltd.,Tianjin 300392,China;School of Electrical and Electronic Engineering,Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043,China)

机构地区：[1]中车株洲电力机车研究所有限公司,湖南株洲412001 [2]天津凯发电气股份有限公司,天津300392 [3]石家庄铁道大学电气与电子工程学院,河北石家庄050043

出　　处：《机车电传动》2024年第2期140-150,共11页Electric Drive for Locomotives

摘　　要：针对地铁直流进线的振荡电流容易引起继电保护系统频繁误动作的问题,文章提出以变分模态分解、样本熵、TOPSIS为核心的故障诊断分析算法,并搭建实时数字仿真试验平台,以地铁继电保护装置为应用场景,通过将改进的进线保护算法与传统逆流保护算法进行试验对比分析,验证了方法在工程实践中的可行性和有效性。结果表明,该方法可有效识别直流进线特殊振荡电流,提高继电保护的可靠性。The paper presents a fault diagnosis and analysis algorithm centered on variational mode decomposition(VMD),sample entropy,and TOPSIS,to address the challenge of frequent misoperations of relay protection systems triggered by oscillating current in the incoming lines of metro traction power supply systems.Using a real-time digital simulation experimental platform,the improved incoming line protection algorithm was compared with traditional reverse current protection algorithms in the application scenario of metro relay protection devices.The experimental analysis verified the practicality and effectiveness of the proposed approach in engineering applications.The study findings highlight the algorithm’s capacity in identifying special oscillating current in DC incoming lines,offering a valuable means to enhance relay protection reliability.

关 键 词：地铁牵引供电系统 直流进线谐振电流 短路电流 进线保护 变分模态分解 

分 类 号：U231[交通运输工程—道路与铁道工程]