电动汽车高功率密度变换器拓扑、控制与能量管理研究

This project proposed a novel hybrid topolgoy, which consists of the cascaded H-bridge and the Matrix Converter for electrical vehicle application. The novel topology can accept both AC and DC input. On energy storage side, it can control the low voltage battery cells independent without large amount in series.Furthermore, the energy storage elements can be of different characteristics. The proposed topology is a compatible system for either battery charging or battery replacement, and can be used for EV, HEV or PHEV system.With the porposed topology can the relative control algorithm, the system power density and the dynamic perofrmance of the energy management are significantly enhanced. The capaictors used in the novel system are also reduecd, which are helpful to improve the system stability, reliability and lifetime. Due to the application of matrix converter and medium frequency transformer, the system power density are improved comapred to tradational structure. In this project, the research will focus on the modulation and control stratey of the proposed topology, also include the optimization on harmonic isssue, dynamic perofrmance when power regeneration, power loss and system efficiency and the mileage extension in vehicle application. From the reserch works in this project, it is expected to be of the relative contributional in the theoretical findings and the application experience in EV industry.

本课题以电动汽车核心子系统（车辆控制系统MCU和能量管理系统ECU）为研究对象，针对现有技术方案存在的技术问题，提出了"交直流混合输入多电平车载变换器"这一解决方案。该系统综合了级联H桥结构、矩阵变换器与中频变压器的优点，可实现低压储能单元的独立控制、兼顾不同特性的储能设备、兼容充电、换电两种运营模式，可适用于纯电动、混合动力和增程式电动汽车。通过采用新的技术路线，系统功率密度得到提升，储能、发电和驱动各部分之间的能量管理简单、高效。电容用量大幅减小，从而提高了系统的稳定性、可靠性和寿命。系统具有四象限运行能力，不存在大规模电池串联，从而有效的提高电池寿命和电能利用率。在此基础上，本课题还将深入研究基于新拓扑结构的相关调制策略和优化算法，包括：能量回馈的动态控制、谐波优化、损耗优化、续航里程优化等关键指标。通过本课题的研究，预期可为后续将科研成果向产业转化奠定一定的理论与应用基础。

本课题以电动汽车核心子系统（车辆控制系统MCU和能量管理系统ECU）为研究对象，针对现有技术方案存在的技术问题，提出了“交直流混合输入多电平车载变换器”这一解决方案。该系统综合了级联H桥结构、矩阵变换器与中频变压器的优点，可实现低压储能单元的独立控制、兼顾不同特性的储能设备、兼容充电、换电两种运营模式，可适用于纯电动、混合动力和增程式电动汽车。通过采用新的技术路线，系统功率密度得到提升，储能、发电和驱动各部分之间的能量管理简单、高效。电容用量大幅减小，从而提高了系统的稳定性、可靠性和寿命。系统具有四象限运行能力，不存在大规模电池串联，从而有效的提高电池寿命和电能利用率。在此基础上，本课题还将深入研究基于新拓扑结构的相关调制策略和优化算法，包括：能量回馈的动态控制、谐波优化、损耗优化、续航里程优化等关键指标。通过本课题的研究，预期可为后续将科研成果向产业转化奠定一定的理论与应用基础。