Energy Management and Powersplit for Hybrid Electric Bus Using DP-Based Optimal Profiles Database

A sub-optimal strategy, based on Dynamic Programming (DP) approach, for online energy optimization of a Hybrid Electric Vehicle (HEV) is presented in this paper. A simultaneous speed profile optimization and optimal power split strategy algorithm of a series-parallel hybrid bus is first proposed in this work. Subsequently, the basis of the offline optimal strategy has been adapted for real-time application by using an appropriate DP-based database. The proposed strategy, using different interpolation techniques, is compared with a strategy based on Stochastic DP and validated on a dedicated high- fidelity model of the hybrid bus that was developed on MATLAB/TruckMaker software.