Micro grid is an important puzzle of the energy Internet. As the brain of the integrated energy station, the coordination controller assumes the pivotal role of control and command.Firstly, in order to verify the performance of the coordinated controller of the micro grid, the typical elements and networking schemes of the micro grid are firstly introduced. Secondly, microgrid simulation system containing all elements is built based on the RTDS real-time simulation platform. Next, the communication networking scheme between the coordinated controller and the RTDS is designed. Finally, simulation tests are carried out based on the closed loop test system, including one - button start - stop test, frequency modulation test, and backup power supply test. The simulation results verify the functions of the coordinated controller, and can provide a solid guarantee for the subsequent application of the coordinated controller on the project site.