Abstract

DC auto-transformer (DCAT) traction power supply system has been studied to solve the rail potential and stray current issues for urban rail transit. However, the previous research of DCAT system mainly focused on the constant load without considering the dynamic performance in real conditions. Thus the dynamic performance index (DPI) is introduced in this paper to evaluate the dynamic performances, which is based on the rail potential and stray current comparisons of DCAT system to the existing system. And DPIs can be adopted to predict the DCAT system’s performances in real applications. Finally, the simulation model is built and the results verify the correctness of theoretical analysis effectively.

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