Research on Grid Connection Control Strategy of Building Energy Router Based on Pre Synchronous VSG Control Technology

Aiming at the problem of unstable DC bus connection in building energy routers, this paper proposes a grid connection control strategy for building energy routers based on pre-synchronous virtual synchronous generator (VSG) control technology. Firstly, an energy router topology is designed, and secondly, the pre-synchronous VSG is analyzed. Pre-synchronous VSG control is adopted for the DC bus connection in the energy router to maintain the stability of the system and reduce the voltage and current impact of the common coupling point. In this paper, the simulation model of pre-synchronous VSG control energy router connected to the grid is established by MATLAB/simulink. In MATLAB, simulation results show that the pre-synchronous virtual synchronous machine (VSG) control has the characteristics of small overshoot. The proposed control strategy proposes a new solution for the grid-connected operation of energy routers.