Development of a Control System of Hybrid Power System Based on the XPC Target for Electric Vehicles

A rapid control prototyping design for hybrid power system has been proposed based on the real-time simulation test bench which constituted by double xPC Target system. A Topology structure is analyzed that the ultracapacitors are connected with power battery packs parallel after a bidirectional DC/DC converter. The ultracapacitor, power battery and the hybrid power system are modelled. For the electric vehicle (EV) application, the control strategy for the hybrid power system is proposed. The simulation results of the hybrid power system and battery-only power system is analyzed under the UDDS (Urban Dynamometer Driving Schedule) with the selective topology structure of hybrid power system. It was suggested that the ultracapacitor can significantly improve the efficiency of the hybrid power system, and the energy consumption of the power battery may decrease 8.97 %. Furthermore, the ultracapacitor can efficiency balance the output of the power battery, and the cycle life of the power battery is significantly improve through optimizing its working range.

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