- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | JIN Shoujie, GUAN Meiling, LI Kunpeng. Steady-State Power Flow in Bilateral Power Supply System for Suburban Railways[J]. Journal of Southwest Jiaotong University, 2023, 58(6): 1231-1239, 1302. doi: 10.3969/j.issn.0258-2724.20211044
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As suburban railways necessitate uninterrupted power supply, bilateral power supply technology is explored to apply in canceling electric phase separation. The equivalent circuit models of parallel bilateral power supply and tree bilateral power supply are established in different modes of external power supply. The calculation model of equilibrium currents is deduced, and the measures are analyzed to reduce equilibrium currents. Taking a city line as an example, the power flow distribution and equilibrium current are simulated under different system operation modes, and the calculation model of equilibrium currents is verified. The feasibility analysis is conducted as to using the bilateral power supply modes in the single-phase AC traction for suburban railways. The results show that in this case when the municipal lines are closed, the maximum power of the traction transformer is 70.36 MV·A, the maximum voltage fluctuation 0.7025%, and the maximum current in 110 kV transmission line 833.418 A. In the bilateral power supply system, the traction transformer and the transmission line can endure the influence of the electromagnetic loop network on the power flow distribution of the grid, which meets the power system requirements in the steady state. The proportion of the equilibrium current in loop closing lines is 2.322%, which has small influence on the system.
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