Under fault conditions, power electronic based equipment usually provides little support to the grid. To address this issue, this paper designed a new type of micro-grid stability controller, which aims to help maintain the voltage level of urban energy internet through the coordination of demand side resources including energy storages, electric vehicles and distributed generations. By analyzing the impedance ratio of distribution networks, a new type of voltage support control strategy is proposed. The effectiveness of the proposed method is validated by using simulation analysis and physical experiments.