并联混合动力汽车功率分配最优控制及其动态规划性能指标的研究

An Investigation into the Optimal Control of Power Distribution for PHEV and the Appropriate Performance Indicator for Dynamic Programming

研究了并联混合动力汽车功率分配的最优控制方法,应用动态规划方法求解功率分配的最优解,并着重分析了其性能指标。该指标融入了电池(电机)功率和整车需求功率,同时建立了燃油消耗和荷电状态变化量之间的物理关系。仿真结果表明,动态规划方法可以大幅度提高混合动力汽车的燃油经济性,并且功率损失型性能指标的效果更加显著。

An optimal control scheme of the power distribution for a parallel HEV is investigated. The optimum solution is obtained using dynamic programming method with the performance indicators for dynamic programming emphatically analyzed. Among them the performance indicator with the objective of minimum power loss is proposed for this investigation. In addition, the physical relationship between the fuel consumption and the change in SOC of battery is established. The results of simulation show that the dynamic programming effectively enhances the fuel economy of HEV and the effectiveness is more remarkable with the‘ power loss＇ performance indicator.