Benefiting from the superior power supply capability, medium-voltage direct current (MVDC) electrified railway is promising for application to long-distance power supply demand high-speed railways, such as cross-strait railways and mountain railways with a high proportion of bridges and tunnels. However, in the conventional MVDC electrified railway under direct power supply mode, abnormal increases in rail potential and stray current cause return current safety issues. To address these issues, this article proposes a novel power electronic autotransformer (PEAT)-based bipolar MVDC electrified railway system. In this system, PEATs are deployed to build a bivoltage power supply circuit and transfer traction return current from rails to negative feeder, which implements the autotransformer (AT) power supply mode. The infrastructure configuration, operation characteristics, and control scheme of the proposed system are introduced in detail. Then, a comprehensive real-time simulation test is implemented to verify the operating principles and performance of the proposed bipolar MVDC electrified railway system. Furthermore, the power supply distances under different voltage levels are calculated, and power supply characteristic comparisons between the direct and AT power supply modes are conducted.
A Novel Power Electronic Autotransformer-Based Bipolar MVDC Electrified Railway System
IEEE Transactions on Transportation Electrification ; 10 , 4 ; 9236-9247
2024-12-01
3282361 byte
Article (Journal)
Electronic Resource
English
European Patent Office | 2018
|Catenary network concepts and autotransformer system at German Railway
British Library Online Contents | 2002
|