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Because the daily training of satellite ground test on real installation may cause serious loss of equipment, real satellite cannot be used as the daily training object. By analyzing the power supply and distribution characteristics of a large number of satellites, a semi physical power supply and distribution equipment simulator is designed to replace the real components and introduce a closed-loop, so as to achieve the physical equivalent of the internal power supply and distribution subsystem of satellites. The data acquisition and data processing system is realized with the computer as the core, and it can receive remote control instructions in real time, generate telemetry data by simulation, and cooperate with the response test process of the ground test system. Hardware physical simulation design of data acquisition, signal generation and other hardware cards, to achieve the distribution equivalent, command equivalent, measurement equivalent functions. The overall design of the simulator takes PXI bus as the interface, which meets the modular and general design of the system, and can facilitate the combination and expansion of other simulators. The field operation and user test show that the equipment can completely replace the satellite power supply and distribution subsystem to realize the simulation of satellite electrical performance and effectively cooperate with the daily training of ground testers.