Study on Voltage Control Method of Energy Router Based on Common DC Voltage Bus

In order to relieve the pressure caused by the direct input of all kinds of distributed energy to the stable operation of distribution network, a kind of multi-port energy router with common DC bus is studied. The energy router provides five standardized interfaces that enable “plug and play” for photovoltaic, energy storage, diesel generators, DC loads and distribution network ports. The virtual motor control algorithm is introduced into the interface control link of energy router, which can increase the damping and inertia of the system, effectively reduce the voltage fluctuation of DC bus, and realize the friendly interconnection between distributed energy and distribution network. At the same time, an improved virtual synchronous motor control algorithm is introduced to make the energy router run stably under the voltage drop of power grid. Finally, an experimental model is built by simulation software to verify the feasibility and effectiveness of the proposed control algorithm.