燃料电池混合动力瞬时优化能量管理策略研究

A Study on the Energy Management Strategy for Fuel Cell Electric Vehicle Based on Instantaneous Optimization

以提高燃料经济性为目标,采用基于瞬时优化的方法开展能量分配策略研究,并引入了蓄电池等价燃料消耗理论,将蓄电池电能消耗或者电能补充,等效为燃料电池发动机的燃料消耗量,并由此建立系统瞬时燃料消耗量函数。为保证蓄电池工作在最优的范围内,引入蓄电池的充电保持策略。仿真结果表明,按照等价燃料消耗量瞬时优化理论得出的优化结果,能提高燃料经济性,同时蓄电池SOC保持在合理范围内,对今后实车的研制具有一定指导意义。

The energy management strategy for fuel cell hybrid electric vehicle is studied based on instantaneous optimization, with enhancing fuel economy as objective. A concept of equivalent fuel consumption of battery is introduced, by which the electric energy consumption or replenishment of the battery is converted to the fuel consumption of the fuel cell engine, and thus the instantaneous fuel consumption function of the system is established. For ensuring the battery working at the optimum region, a charge-sustaining strategy for the battery is introduced. A simulation is performed and the results show that the instantaneous optimization on equivalent fuel consumption can improve fuel economy while the SOC of the battery is maintained at reasonable range.