关键词: 插电式混合动力客车；能量管理策略；动态规划；全局优化

Abstract: The performance of energy management between multiple power sources has a greater impact on the energy consumption of plug-in hybrid electric vehicles. Thus, this paper takes a plug-in hybrid electric bus as the research object, and uses the control strategy, dynamic programming (DP) strategy and pontryagin's minimum principle (PMP) strategy based on global optimization to calculate and analyze the energy consumption of the vehicle. Firstly, the vehicle model and sub-component model are established based on MATLAB, and the energy consumption under DP and PMP strategy is simulated and calculated under the Chinese typical urban bus driving cycle, and the energy consumption under traditional charge depleting-charge sustaining (CD-CS) strategy is compared. The results show that both the DP and PMP strategies can make the state of charge (SOC) of the power battery change almost linearly in the whole process, and achieve the overall optimal control effect. Compared with CD-CS strategy, the energy consumption of DP strategy is reduced by 15.12%, but the huge amount of computing is not negligible. Compared with the CD-CS strategy, the PMP strategy reduces the energy consumption by 14.28%, but it is difficult to determine the initial co-state variables.

Key words: Plug-in hybrid electric bus; Energy management strategy; Dynamic programing; Global optimization