Research on Grid-Connected Control Strategy of an AC and DC Power Router

Abstract

The application of power routers in the energy Internet increases the diversity of power supply, and also solves the problem of multi-directional power flow. In this paper, a small-capacity single-phase AC and DC power router is designed according to the actual needs of home users. The AC and DC systems are connected by bidirectional DC/AC converters to ensure reliable power supply to the load. Since the output of distributed power is easily fluctuated by the weather, this paper proposes an improved sliding average algorithm for the grid-connected control strategy of power routers, which can obtain the output command power of distributed power. By controlling the distributed power output to track the command power, a smooth grid-connected power can be obtained and fluctuations can be reduced. Finally, the correctness of the proposed grid-connected control method is verified by simulation.