针对大量电动车接入电网充电，造成电网稳定性降低和充电桩缺乏与电网交互的问题，文中设计了考虑电动车参与的构网型充电桩系统，提出了构网型充电系统的整体结构，考虑了一二次融合便捷性、板卡可靠性，设计了通用化控制板卡，建立了车网互动(vehicle to grid，V2G)交互模型和虚拟同步发电机(virtual synchronous generator,VSG)控制模型，提出充电桩控制策略，由基于V2G的改进VSG算法和底层模型预测控制(model predictive control,MPC)双层控制策略构成，通过实例验证，相较于传统的VSG控制算法，将总谐波失真由11.79%降至2.94%，证明了设计系统能够提高电动车接入时的稳定性。
英文摘要:
In response to the problems of reduced grid stability and lack of interaction between charging piles and the power grid caused by the integration of electric vehicles into the grid for charging, this paper designs a grid type charging pile system that considers the participation of electric vehicles. The overall structure of the grid type charging system is proposed, taking into account the convenience of primary and secondary integration and the reliability of the board, a universal control board is designed. The vehicle to grid （V2G） interaction model and virtual synchronous generator (VSG) control model are established for electric vehicles. A charging pile control strategy is proposed, consisting of an improved VSG algorithm based on V2G and a two-layer control strategy for the underlying model predictive control（MPC）. The example verifies that, compared to the traditional VSG control algorithm, the total harmonic distortion is reduced from 11.79% to 2.94%, proving that the designed system can improve the stability of electric vehicle integration.