A Novel Co-phase Traction Power Supply System in Electrified Railway

Abstract The electrified railway has power quality problems such as three phases seriously unbalanced, large harmonics, and reactive power. In addition, the neutral section exists at each supply section, which restricts development of high-speed heavy-haul railway. This paper proposes a novel co-phase traction system (TPSS) based on YNvd balanced transformer, can not only solve above but also save one single-phase coupling step-down thus reducing cost space whole system. voltage level converter switching device be reduced by rational design transformer tap position, enhances reliability feasibility compensation principle control strategy TPSS are analyzed in detail this paper, current detection integrated flow controller (IPFC) methods given. Simulation analysis show that proposed topology structure method correct feasible.