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- 2015
复合电源系统功率分配策略研究
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Abstract:
从复合电源系统数学模型出发,选取电机需求功率、电量消耗模式与电量维持模式切换时动力电池的荷电状态、超级电容补电上限及动力电池恒放电功率这4个因子,提出了基于4因子法的复合电源系统功率分配策略。在分析超级电容能量利用率、插电式混合动力汽车运行环境及用电机制的基础上,采用控制变量法分别建立了基于离合器结合转速和混合驱动时超级电容充电状态的2种不同分配策略。试验表明,与基于电机平均功率分配策略相比,全程处于电量消耗模式下的策略其燃油经济性最好且提升了3.15％,从而验证了该策略的有效性。基于模拟退火算法的优化结果,得出了各因子对综合油耗的影响机理,以期为建立复合电源系统功率分配策略提供理论基础。
Four？？factor power allocation strategy for the hybrid power system is proposed by selecting the motor required power, the battery state of charge (SOC) as switching between charge？？depleting (CD) and charge？？sustaining (CS), the super？？capacitor upper limit of SOC, and the battery maximum constant discharge power from the point of hybrid power system model. Analyzing the super？？capacitor energy efficiency and the plug？？in hybrid electric vehicle operating environment and electric mechanism, and adopting control variable method, two different kinds of allocation strategies are established by combining clutch and speed and judging charging states of the super？？capacitor in hybrid drive on CD. Compared with the control strategy based on the average motor power, the fuel economy of the strategy fully on CD reaches the most efficiency, which rises by 3.15％. The trend curves of influence of each factor on the integrated fuel consumption are drawn with the optimization results of SA to guide to construct power allocation strategy for hybrid power system
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