燃料电池增程式商用车动力系统特性的仿真分析

发布时间：2019-01-14 17:29

【摘要】：目前燃料电池增程式电动车是传统车向纯电动汽车过渡的主流车型。燃料电池增程式电动车既能发挥纯电动车高效、节能的优势,又能弥补其续驶里程不足的缺点。对于燃料电池增程式商用车的研究,包括合理地选择燃料电池增程器、对于燃料电池增程式商用车动力系统的匹配分析、增程器控制策略的设计与优化,并在此基础上对燃料电池商用车动力系统性能进行分析,在新能源商用车研发过程中有重要意义。针对所研究的燃料电池增程式商用车动力系统的结构特性,确定了燃料电池增程式商用车动力系统间接并联式的动力系统“FC+B”的动力系统构的结构并对部件的选型进行分析并进行匹配计算。根据燃料电池增程式商用车增程器特性和商用车动力系统的特点,确定了增程器控制策略的设计原则。分析对比了开关式控制策略、功率跟随式控制策略、模糊逻辑控制策略等特性,构建了适用于燃料电池增程式商用车的燃料电池增程器开关/功率跟随式增程器控制策略,并对策略模糊算法进行了研究。根据燃料电池增程式商用车动力系统的结构特点,本文建立了Cruise/Simulink的动力系统联合仿真模型。运用Simulink软件建立了燃料电池增程器的仿真模型。对增程器的控制策略进行了建模,该策略通过动力电池SOC和整车需求功率的门限值,实现对燃料电池的开关状态和燃料电池输出功率的大小进行控制调节。参照实车运行的动力性和经济性试验测试结果,采用与实车测试相同的工况状态,对整车仿真模型进行验证,将仿真分析结果与试验测试结果进行对比分析,结果表明所建立的仿真模型是能够比较真实地反映燃料电池增程式商用车动力系统的运行特性。基于所建立仿真平台,进行了燃料电池增程式商用车动力系统动力性和经济性的仿真分析,研究表明功率跟随模糊控制算法有助于提高整车整体性能。对燃料电池增程式商用车动力系统参数进行了选型的优化分析,分析了燃料电池和驱动电池性能参数对商用车动力系统性能的影响,并20种动力系统构型的匹配方案进行仿真分析,确定了动力性能最优与经济性能最优的两种方案。再此基础上研究了增程器运行功率区间的匹配,以提高经济性为目的,仿真确定最优的功率输出区间的上下限。
[Abstract]:At present, fuel cell programmable electric vehicle is the mainstream vehicle in the transition from traditional vehicle to pure electric vehicle. Fuel cell programmable electric vehicle can not only bring into play the advantages of pure electric vehicle such as high efficiency and energy saving, but also make up for its shortage of running mileage. The research on the fuel cell augmentation commercial vehicle includes the reasonable selection of fuel cell range booster, the matching analysis of fuel cell incremental commercial vehicle power system, the design and optimization of the control strategy of the extended range vehicle. On this basis, the performance of fuel cell commercial vehicle power system is analyzed, which is of great significance in the research and development of new energy commercial vehicle. In view of the structural characteristics of the fuel cell programmed commercial vehicle power system, The structure of the power system of the indirect parallel power system "FC B" of the fuel cell incremental commercial vehicle power system is determined, and the selection of the components is analyzed and the matching calculation is carried out. According to the characteristics of fuel cell programmed commercial vehicle range booster and the characteristics of commercial vehicle power system, the design principle of the control strategy of the increasing program commercial vehicle is determined. The characteristics of switching control strategy, power following control strategy and fuzzy logic control strategy are analyzed and compared. The strategy fuzzy algorithm is also studied. According to the structural characteristics of fuel cell enhanced program commercial vehicle power system, a joint simulation model of Cruise/Simulink power system is established in this paper. The simulation model of fuel cell range booster is established by using Simulink software. The control strategy of the range booster is modeled. The switching state of the fuel cell and the output power of the fuel cell are regulated by the power cell SOC and the power threshold of the vehicle. According to the test results of power and economy, the simulation model of the whole vehicle is verified by using the same condition state as the real vehicle test, and the results of simulation and test are compared and analyzed. The results show that the simulation model can truly reflect the operating characteristics of the fuel cell enhanced commercial vehicle power system. Based on the simulation platform, the power performance and economy of the fuel cell enhanced commercial vehicle power system are simulated and analyzed. The research shows that the power following fuzzy control algorithm is helpful to improve the overall performance of the vehicle. The parameters of fuel cell added program commercial vehicle power system are optimized and analyzed, and the influence of fuel cell and drive battery performance parameters on the performance of commercial vehicle power system is analyzed. Two schemes of optimal dynamic performance and optimal economic performance are determined by simulation and analysis of 20 kinds of matching schemes of power system configuration. On this basis, the matching of the operating power interval of the range booster is studied. In order to improve the economy, the upper and lower limits of the optimal power output range are determined by simulation.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U469.72

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