南京大胜关桥交直流供电系统电磁感应影响分析

摘要

It is the first case that the overhead contact lines of railway and subway are laying out on the same bridge in close distance, and there is no any experience in China, so the interference influence of the electrified lines must be fully considered. Through an introduction of Da-sheng-guan Bridge of Nanjing subway Line 12. based on the characters of railway AC power supply system and subway DC power supply system, this paper calculates the electromagnetic interference that railway AC power supply system acted to subway DC power supply system, and provides some solutions to the interference.%南京大胜关桥的国铁和地铁接触网同桥面近距离水平敷设,这在国内尚属首次,并且无经验可参考.必需考虑交、直流带电线路间的电磁感应对运营、维护等带来的影响.结合国铁交流AT(自耦变压器)供电方式和直流供电方式的特点,对国铁交流系统对地铁直流系统的电磁场感应现象进行了初步估算,并就感应影响作出了初步分析,提出了一些解决措施.