Abstract: With the aggravation of the energy crisis, more and more countries have begun to research on the energy internet, aiming to realize a large-scale access and intelligent control of renewable energy. In this context, power electronic transformer is a promising electrical device to serve as the “energy router” for the reason that it provides multiple types of electrical interfaces and is highly controllable. Compared with traditional transformers, PET has the ancillary functions like reactive power compensation, fault isolation, power factor adjustment, and the advantage of small size and light weight. It is an ideal grid-connected device for microgrids. This paper presented a topology of a PET based DC microgrid and its control strategy. The power management and the influences of the microgrid on the distribution network are elaborated. The behavior of the proposed system and the influences of the microgrid on the two indices of loss and power quality of distribution network are observed and analyzed by PSCAD/EMTDC.