Study on Superconducting Magnetic Energy Storage for Large Subway Stations with Multiple Lines

Wenjing Mo, Boyang Shen (), Xiaoyuan Chen (), Yu Chen and Lin Fu ()
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Wenjing Mo: College of Transportation, Tongji University, Shanghai 201804, China
Boyang Shen: College of Transportation, Tongji University, Shanghai 201804, China
Xiaoyuan Chen: School of Engineering, Sichuan Normal University, Chengdu 610101, China
Yu Chen: College of Transportation, Tongji University, Shanghai 201804, China
Lin Fu: College of Transportation, Tongji University, Shanghai 201804, China

Energies, 2025, vol. 18, issue 21, 1-19

Abstract: With accelerating urbanization, subway stations, as high-energy-consumption sectors, face significant challenges in maintaining power supply stability and ensuring power quality. This paper proposed a novel voltage compensation solution utilizing superconducting magnetic energy storage (SMES) to suppress voltage fluctuations in the traction system of a large subway station with multiple lines, which was caused by frequent acceleration and regenerative braking of multiple subway trains. Using the MATLAB/Simulink platform, a model of the traction power system with SMES for a large subway station with multiple lines was constructed. Appropriate control methods and hierarchical control strategies were used to suppress voltage fluctuations in both single-line and multi-line configurations at subway stations. The technical advantages of SMES in rapid response and efficient charging/discharging were explored. Overall, results show SMES with the novel control strategies can effectively suppress voltage fluctuations on both single- and triple-line configurations, validating the feasibility in mitigating voltage fluctuations and enhancing regenerative braking energy utilization.

Keywords: superconducting magnetic energy storage (SMES); subway station traction system; voltage fluctuation suppression (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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