串联混合动力汽车瞬时优化控制策略研究

建立了基于传动系能量均衡以电池充放电电流为控制变量的系统模型和以等效燃油消耗率最小为目标的优化数学模型。在设定参数条件下,以基于电量平衡的瞬时优化策略对两种常见行驶工况进行了整车仿真。将仿真结果与功率跟随策略的仿真结果进行比较,表明瞬时优化策略能更好地维持车辆行驶过程中电池电量平衡。

Study on Instantaneous Optimization Strategy of Series Hybrid Electrical Vehicle

The system model whose control variable was the charge-discharge current of battery and the optimization mathematic model whose aim was achieving the minimum equivalent fuel consumption were created based on energy balance of drive train.Under the condition of given parameter,the two common driving cycles were simulated with the instantaneous optimization strategy based on SOC(state of charge) balance.It was found by comparing the simulation results of instantaneous optimization strategy and power following strategy that the instantaneous optimization strategy could keep the SOC balance of whole driving cycle more effectively.