Industrial design and application of a railway electric special power supply

The newly constructed railway on the plateau (remote and depopulated area) were facing a very practical problem that the railway electric distribution supply system (EDSS) cannot find the public power supply. The conventional solutions suffer from the problems of the huge cost and construction difficulties. Therefore, the topology, industrial design and control of railway electric special power supply (RESPS) are proposed in this paper for cost-effectively supporting power to EDSS. Regarding to potential over-current driver fault caused by EDSS load, a piecewise linear PI control strategy is proposed to improve the continuous operation capability of the inverter once inrush current occurred. To verify the proposed RESPS, the simulation results and 27.5/10 kV, 1000 kVA RESPS field application tests are carried out to prove the feasibility of the RESPS. Finally, some depth thoughts that maybe helpful to the future development are summarized.