混合电动汽车车载功率变换器的研究

发布时间：2018-06-05 20:17

本文选题：混合电动汽车 + 能量管理系统　；参考：《东北电力大学》2014年硕士论文

【摘要】：近年来，随着全球范围内化石能源危机的日趋严峻和环境保护的迫切需求,新能源汽车因对传统化石能源的依赖及对环境影响相对较小，其前景被广泛看好。我国已把新能源汽车在现代化城市交通系统中的推广与应用列入未来重点发展目标，，十一五、十二五规划中，新能源汽车都被列入国家重点发展与扶持的行业。针对短途或城市内交通，纯电动汽车行驶里程受限的缺点相对不突出。但要对传统燃油汽车构成竞争，需大幅增加续航里程。因此在目前储能技术短时间内难以有突破性进展的背景下，混合电动汽车是更具有实用意义的解决方案。针对现有混合电动汽车能量管理系统所存在的功率密度低、可靠性差等问题，提出了一种基于级联H桥和矩阵变换器结构的高功率密度变换器拓扑。电池储能单元和车载内燃机发电单元提供整车驱动所需要的电功率，二者分别通过级联H桥和矩阵变换器与中频多绕组变压器输入侧绕组相连，中频多绕组变压器完成整车功率在电源和负载间的灵活、高效传输。其中，级联H桥电路作为储能单元控制电路的重要组成部分，在电池充放电过程中，通过均衡电池模块的动态电压，可以改善电池的工作环境，延长电池的使用寿命。所提出的车载变换器降低了电池的串联规模和电解电容的使用量，可以显著提高混合电动汽车能量管理系统的功率密度和可靠性。在Matlab/Simulink环境中建立了相应的仿真模型，仿真结果验证了所提拓扑结构和相应控制策略的正确性。同时搭建了基于新型拓扑的物理样机平台，验证了所制定的控制策略的有效性。
[Abstract]:In recent years, with the increasingly severe crisis of fossil energy and the urgent need of environmental protection, the prospects of new energy vehicles are widely promising because of their dependence on traditional fossil energy and relatively small impact on the environment. In China, the promotion and application of new energy vehicles in the modern urban transportation system have been included in the future key development goals. In the 11th Five-Year Plan and the 12th Five-Year Plan, new energy vehicles are listed in the industries of national key development and support. For short distance or urban traffic, pure electric vehicle mileage restriction is relatively not obvious. However, in order to compete with traditional fuel-powered vehicles, it is necessary to substantially increase the mileage. Therefore, hybrid electric vehicle (HEV) is a more practical solution under the background that it is difficult to make a breakthrough in the current energy storage technology in a short period of time. A high power density converter topology based on cascaded H bridge and matrix converter is proposed to solve the problems of low power density and poor reliability in the existing hybrid electric vehicle energy management system. The battery energy storage unit and the on-board internal combustion engine power generating unit provide the electric power needed for the whole vehicle drive. They are connected to the input side windings of the if multi-winding transformer through cascaded H-bridge and matrix converters, respectively. If multi-winding transformer completes the flexible and efficient transmission of power between power supply and load. As an important part of the control circuit of energy storage unit, the cascaded H-bridge circuit can improve the working environment and prolong the service life of the battery by equalizing the dynamic voltage of the battery module during the charging and discharging process of the battery. The proposed on-board converter reduces the battery size in series and the use of electrolytic capacitance, and can significantly improve the power density and reliability of the hybrid electric vehicle energy management system. The corresponding simulation model is established in the Matlab/Simulink environment. The simulation results verify the correctness of the proposed topology and the corresponding control strategy. At the same time, the physical prototype platform based on the new topology is built to verify the effectiveness of the proposed control strategy.
【学位授予单位】：东北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM46;U469.72

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