Improvement in Control and Reliability Indices for Subway Trains’ Non-Traction Power Supply System Through a New Structure

Babaeyzadeh, Mohammad; Fazel, Seyed Saeed; Arab Khaburi, Davood

doi:10.22068/ijrare.363

Volume 12, Issue 2 (7-2025) IJRARE 2025, 12(2): 99-114 | Back to browse issues page

‎ 10.22068/ijrare.363

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Babaeyzadeh M, Fazel S S, Arab Khaburi D. Improvement in Control and Reliability Indices for Subway Trains’ Non-Traction Power Supply System Through a New Structure. IJRARE 2025; 12 (2) :99-114
URL: http://ijrare.iust.ac.ir/article-1-363-en.html

Improvement in Control and Reliability Indices for Subway Trains’ Non-Traction Power Supply System Through a New Structure

Mohammad Babaeyzadeh

, Seyed Saeed Fazel

, Davood Arab Khaburi

School of Railway Engineering, Iran University of Science and Technology, Tehran, Iran

Abstract: (21 Views)

Nowadays, 2 to 4 inverters are installed in a metro train to feed the non-traction electrical loads (auxiliary loads). Increasingly, the reliability of this Auxiliary power supply systems (APSS) is paramount, ensuring uninterrupted operation of vital subsystems such as lighting, ventilation. In this paper, a novel approach to enhance the reliability and performance of APSS is presented. Following an introduction to the conventional APSS structure, a new framework is proposed through four key steps: 1) Data input, 2) Revamped classification of auxiliary loads based on technical parameters, 3) Strategic allocation of power sources to load groups, and 4) Enhancement of reliability indices. Through a detailed case study (Tehran metro’s trains), the superiority of the new APSS is demonstrated, showcasing improved control features, heightened reliability, enhanced fault tolerance, and reduced implementation costs. The analysis and results reveals a significant improvement in reliability, with the new APSS exhibiting a maximum non-reliability rate of 0.13%, compared to 0.47% for the conventional system. Furthermore, the findings highlight the new APSS's ability to maintain power supply to high-priority load groups even after multiple faults

Keywords: Metro Car, Auxiliary loads, Inverter, Reliability, APSS

Full-Text [PDF 1513 kb] (36 Downloads)

Type of Study: Research | Subject: Rolling Stock