Auxiliary power source simulation system

The invention provides an auxiliary power source simulation system, which comprises a control unit, a signal conversion unit and a simulator. The signal conversion unit is electrically connected withthe control unit and the simulator; the control unit is used for sending a control command to the simulator and receiving a feedback signal sent by the simulator; the signal conversion unit is used for converting signals transmitted between the control unit and the simulator; the simulator is used for operating simulation models to obtain the feedback signal and transmitting the feedback signal tothe control unit. The simulation modules comprise at least two auxiliary power source circuit models with different circuit topologies and at least one storage battery charger circuit model. By adopting the semi-physical simulation system suitable for various different topologies and various voltage levels, auxiliary power source systems of various different vehicle types can be subjected to simulation verification, by ad