Electronic Power Transformer is a new type of power conversion device suitable for medium-voltage power grids for AC/DC voltage conversion and flexible control of energy. It is mainly used in AC/DC distribution networks and flexible DC systems. Compared with traditional transformers, it can realize multi-party coordinated control, better coordinate the power distribution of the distribution network, and at the same time have fault current limiting and self-healing functions to improve the economy and reliability of power grid operation.