西南交通大学学报2025，Vol.60Issue(3)：533-540,549,9.DOI:10.3969/j.issn.0258-2724.20240503
电气化铁路贯通供电对电网的影响与解决方案
Impact of Interconnected Power Supply for Electrified Railways on Power Grids and Its Solutions
摘要
Abstract
To realize the interconnected power supply for electrified railways,it is essential not only to address the bilateral power supply between two or more traction substations within the railway network but also to solve the impacts of interconnected power supply for railways on power grids.In this paper,the influence of single-end and interconnected power supply systems on the grid,as well as their differences,was compared,and the feasibility of bilateral power supply according to the grid loop closing regulation was discussed.A calculation model of through power for the interconnected power supply was developed,and a method for monitoring the through power was proposed.Three types of solutions for through power were introduced:tree-structured power supply,co-built substation,and through power utilization.A multi-functional intelligent traction substation was then proposed,integrating negative sequence control and regenerative power utilization to mitigate the adverse effects on the power grid.This can facilitate broader implementation of interconnected power supply in railways,eliminate phase separation,and address areas without power.The finding indicates that when power is supplied by dedicated lines from the grid and the distance between traction substations does not exceed 80 km,the voltage difference in the closed loop remains below 16.00%for a bilateral power supply,and the phase angle difference is within 12.00°,both of which are within the specified limits for loop closing regulation.Compared to the co-phase single-end power supply,interconnected power supply shows better performance in solving the issue of through power in power grids.Additionally,it enhances the utilization of regenerative power,offering better technical performance.关键词
电气化铁路/贯通供电系统/电磁合环/穿越功率/智能牵引变电所Key words
electrified railway/interconnected power supply system/electromagnetic loop closing/through power/intelligent traction substation分类
动力与电气工程引用本文复制引用
李群湛..电气化铁路贯通供电对电网的影响与解决方案[J].西南交通大学学报,2025,60(3):533-540,549,9.基金项目
国家能源投资集团有限责任公司重大科技项目(F1GD20200002) （F1GD20200002）
