Accelerated Model of Static Power Converter for Co-Phase Traction Power System

The power converter based co-phase traction power system has the advantages of canceling neural sections and providing high power quality for both the external grid and the traction system. Electromagnetic transient simulation is a powerful tool for the transient phenomena study, control and protection system design and testing of the co-phase system. However, the number of the converters and its relatively complex converter topology both impose the challenge for the simulation speed, which affects the productivity for the co-phase system study. This work proposes an accelerated model on PSCAD/EMTDC for the static power converter (SPC) based on cascaded AC/DC/AC sub-modules (SMs), which is applied in Beijing Daxing Airport Express co-phase project. The accelerated model can obtain 19.8 times speedup with the accurate and detailed simulation results compared with the complete model using discrete switches in the co-phase system containing 4 SPCs with 16 SMs in each of them.