2022 Volume 63 Issue 3 Pages 175-180
A high voltage DC feeding system, which consists of higher-voltage feeders and DC-DC converters in addition to an existing feeding circuit, is assumed to improve the performance of power supply to trains without changing the nominal voltage of contact lines and onboard traction systems. In this system, the method for controlling the converter is an important element which must be taken into consideration to maximize energy savings. In this paper, we propose a converter control method to make the voltage ratio constant between the contact line and the higher-voltage feeder. In this paper, the high voltage DC feeding system with this converter control method is called a "DC-AT feeding system." We evaluated the energy savings of this system through simulation, and case studies on a model line confirmed that this system can reduce energy consumption by 4.5% at most, and on average 3.5%, compared to conventional DC feeding systems.
