ORIGINAL RESEARCH article
Front. Smart Grids
Sec. Grid Efficiency
Analysis of Theoretical Line Loss in Metro Distribution Network
Provisionally accepted
- 1Guangzhou Power Supply Bureau, Guangdong Power Grid Co., LTD., Guangdong, China
- 2Guangdong Provincial Key Laboratory of Intelligent Measurement and Advanced Metering of Power Grid, Guangdong, China
- 3CSG Electric Power Research Institute, Guangdong, China
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Novel cable traction power supply system can effectively solve the issues caused by trains 3 passing through electrical phase separation and improve the utilization rate of regenerative energy 4 in the system. However, due to the cable power supply mode, its structure is relatively complex, 5 and the internal line energy consumption needs further study. To calculate the train-network line 6 losses, first this paper established the equivalent solid circuit model of the system through an 7 external cascade strategy. Then, based on the actual train operation load modeling, the power 8 output of the traction transformer and network losses under traction and regenerative braking 9 conditions were analyzed. The calculation results show that the proposed model can accurately 10 calculate and reflect the electrical characteristics of the traction energy supply system.
Keywords: Cable traction network, Distribution network, lineloss calculation, Subway systems, transformer output power
Received: 05 May 2025; Accepted: 29 Jan 2026.
Copyright: © 2026 Zhao, Chen, Zhang, Yuxin, Zhao and Liu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Lu Yuxin
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