摘要
目的改善燃料电池混合动力汽车的燃料经济性,优化混合动力系统能量管理控制.方法采用燃料电池和镍氢蓄电池构成新能源混合动力系统,以最少等效燃料消耗为目标函数,建立了混合动力系统能量分配管理的数学模型,引入惩罚因子对蓄电池的SOC进行调控,HWFET驾驶循环工况优化了混合动力系统实时能量分配结果当SOC介于0.5和0.8之间时,混合动力系统进入瞬时优化能量管理策略;当SOC<0.5时,混合动力系统由燃料电池供能并给蓄电池充电;当SOC>0.8时,混合动力系统主要由蓄电池供能,动力不足情况下由燃料电池能量补充;在惩罚因子的作用下,SOC将处于一个合理区域,最终使混合动力系统处于最优能量分配管理状态.结论实时功率优化控制策略避免燃料电池处于低功率低效率输出,在燃料电池和蓄电池之间合理分配功率,提高了燃料经济性,同时惩罚因子的引入保证了SOC稳定性.
Energy distribution management is the key technology for hybrid power system in auto- mobile. In this paper, the fuel cell and nickel-hydrogen storage battery are adopted to constitute the new-energy hybrid power system and a mathematical model for the energy distribution manage- ment is established; the penalty factor is introduced to regulate SOC of the storage battery, and op- timization of real-time energy distribution for this hybrid power system is carried out, based on the HWFET driving cycle conditions. Results show that when the battery SOC is between 0. 5 and 0. 8, the hybrid power system is in the state of instantaneous optimization of energy management; when the battery SOC is less than 0.5 ,it is powered by fuel cells with battery charging;when the battery SOC is greater than 0. 8, the hybrid system is mainly supplied by the battery power; if thepower is not enough, it will supplemented by the fuel cell energy. With the penalty factor, the bat- tery SOC steadies in a reasonable area, eventually the hybrid systems is in the state of optimal ener- gy distribution management. It indicates that the introduction of the penalty factor ensures the sta- bility of the battery SOC. The real-time power optimization control strategy avoids the fuel cell in a low output efficiency and makes a reasonable power distribution between the fuel cell and the bat- tery power, which can increase the fuel economy.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
北大核心
2014年第5期902-908,共7页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(51176131
51476107)
沈阳市科技计划项目(F11-264-1-01)
辽宁省特聘教授支持项目
