Introduction  With the continuous development of VSC-HVDC technology, it has become the mainstream of DC transmission technology. For long-distance, high voltage, high power demands for power transmission, ± 800 kV VSC-UHVDC transmission engineering applications are imminent. As the core part of the VSC-UHVDC converter station, the layout of the converter transformer is very important and will have a significant impact on the general layout of the whole station.

  Method  Based on the technology of VSC-UHVDC, this paper analyzed single line diagram, the layout of converter transformer, layout of converter transformer square, and the layout of starting circuit. And according to the characteristics, this paper provided a superior design of converter transformer layout.

  Result  The layout is highly reliable and can be implemented, saving the space and investment cost.

  Conclusion  The research is instructive for the engineering application of the ± 800 kV DC converter station and has a wide range of engineering application prospects.