Research on Traction Power Supply System for Shanghai Rail Transit Chongming Line
Journal Title: Urban Mass Transit - Year 2024, Vol 27, Issue 1
Abstract
[Objective] It is to address issues such as stray current corrosion and limited distance for DC traction power supply systems conventionally using rail return in urban rail transit. [Method] After conducting a comparative analysis of the application, technical characteristics and applicability indicators of AC 25kV/50Hz and DC traction power supply systems in major urban rail transit systems in China and abroad, and considering the uniqueness of Shanghai Rail Transit Chongming Line project, it is suggested to adopt DC 1 500 V catenary system with a dedicated negative special return rail for traction power supply. Two power supply schemes are designed for the tunnel section crossing Yangtze River, and simulation calculations for indicators of both schemes are performed, evaluating the minimum voltage of the traction network, rectifier unit power, and the effective current of the traction substation when the power supply system capacity reaches 24 pairs per hour. A comparative analysis is conducted. [Result & Conclusion] The use of a special negative return rail in the DC traction power supply system fundamentally eliminates the generation of stray currents and their corrosion impact on surrounding pipelines. Compared to the ′dual-set configuration′ scheme for traction DC equipment, In the scheme with a traction substation set up in the long-distance section crossing the Yangtze River, exhibits advantages in power supply reliability and capacity.
Authors and Affiliations
Xiaofeng WANG
Keywords
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- EP ID EP727700
- DOI 10.16037/j.1007-869x.2024.01.017
- Views 23
- Downloads 0
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