Transactions of China Electrotechnical Society  2022, Vol. 37 Issue (4): 976-989    DOI: 10.19595/j.cnki.1000-6753 tces.210880
Current Issue| Next Issue| Archive| Adv Search |
Fault Protection of DC Auto-Transformer Traction Power Supply System for Urban Rail Transit
Wang Miao, Yang Xiaofeng, Li Shixiang, Ni Menghan, Trillion Q. Zheng
School of Electrical Engineering Beijing Jiaotong University Beijing 100044 China

Download: PDF (58705 KB)   HTML (1 KB) 
Export: BibTeX | EndNote (RIS)      
Abstract  

DC auto-transformer (DCAT) traction power supply system has a promising application prospect in urban rail transit because of the rail potential and stray current mitigation. However, the traditional DCAT may lack the sufficient fault protection capability, when DC traction power supply network short circuit or device failure of DCATs. DC-link capacitors and resonant capacitor of DCAT may discharge rapidly through the fault, which leads to the device damage of DCAT and fault pervasion. Therefore, the fault protection DC auto-transformer (FP-DCAT) is proposed in this paper. With the research on topology and control of FP-DCAT, the fault protection schemes of FP-DCAT system for typical faults are studied in detail. FP-DCAT system may operate normally after fault protection, but the rail potential and stray current of system may increase due to the removal of fault FP-DCAT. Thus the effects of fault protection on the rail potential and stray current are analyzed. Finally, the simulation results show that FP-DCAT system achieves fault protection effectively, and the variation of rail potential and stray current due to fault protection is consistent with the theoretical analysis, which ensures the high safety and reliability of FP-DCAT system applied to urban rail transit.

Key wordsUrban rail transit      DC auto-transformer      fault protection      rail potential      stray current     
Received: 16 June 2021     
PACS: TM46  
Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors
Wang Miao
Yang Xiaofeng
Li Shixiang
Ni Menghan
Trillion Q. Zheng
Cite this article:   
Wang Miao,Yang Xiaofeng,Li Shixiang等. Fault Protection of DC Auto-Transformer Traction Power Supply System for Urban Rail Transit[J]. Transactions of China Electrotechnical Society, 2022, 37(4): 976-989.
URL:  
https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753 tces.210880     OR     https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I4/976
Copyright © Transactions of China Electrotechnical Society
Supported by: Beijing Magtech