西南交通大学学报2023，Vol.58Issue(6)：1231-1239,1302,10.DOI:10.3969/j.issn.0258-2724.20211044
市域铁路双边供电系统的稳态潮流
Steady-State Power Flow in Bilateral Power Supply System for Suburban Railways
摘要
Abstract
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.关键词
市域铁路/双边供电/电磁环网/均衡电流Key words
suburban railway/bilateral power supply/electromagnetic loop network/equilibrium current分类
交通运输引用本文复制引用
靳守杰,管美玲,李鲲鹏..市域铁路双边供电系统的稳态潮流[J].西南交通大学学报,2023,58(6):1231-1239,1302,10.基金项目
国家自然科学基金(51877182) （51877182）
四川省科技计划(2021YJ0028)广州地铁设计研究院股份有限公司科技项目(R110421H01090). （2021YJ0028）
