Battery state-of-charge(SOC)reference trajectory planning is very important to improve the performance of the plug-in hybrid electric vehicle(PHEV)energy management strategy.This paper proposes a SOC reference trajectory plan-ning method based on dynamic programming,which obtains the traffic flow speed data of different road sections that the vehi-cle will pass through in the future from the intelligent transportation system(ITS),and then uses the dynamic programming(DP)algorithm to perform SOC reference planning.Through parameter optimization and solution process optimization,the so-lution time of DP is improved.Combining the proposed SOC planning algorithm with the adaptive equivalent fuel consump-tion minimization strategy(A-ECMS),simulation results using real-world data show that the DP-based SOC reference planning method saves 4.63％comprehensive fuel consumption than the charge-sustaining SOC reference.
plug-in hybrid electric vehicleenergy management strategybattery SOC reference trajectorydynamic programming
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