多调制模态双有源桥DC-DC变换器能耗优化方法及关键技术研究

The energy storage system supports the development of the all-electric armoured vehicle. The bidirectional DC-DC will be widely used in new all-electric armoured vehicles. Therefore, how to achieve high efficiency in different operating condition is the key concern. In a wide battery voltage range, the conventional dual active bridge DC-DC converters have large conduction loss and are hard to achieve soft switching. This project will investigate the topologies, modulation strategies and control methods in modular dual active bridge DC-DC converters with auxiliary units and dual active bridge converters with current induced trapezoidal modulation. In terms of the analyzes of the different working modes in the dual active bridge DC-DC converters, the modulation and unified control strategy for multi working modes will be proposed to cover different battery voltages and load power. Meanwhile, the design guideline and method for the dual active bridge DC-DC converter working in different working modes with seamless transitions will be proposed to achieve the global optimization in conduction loss and soft switching. With the proposed controller parameter design in similar gradient for multi working modes, the converter can achieve the fast transient response and stability in different working modes. The research achievements will provide new idea and new method for the energy storage systems in a wide battery voltage range, and the theory and technology level in the field of bidirectional DC-DC converter for the power supply of the all-electric armoured vehicle will be promoted and supported.

双向DC-DC变换器随着新型全电装甲车辆电源系统的发展在其中得到应用。本项目将研究双有源桥为代表的双向DC-DC变换器，针对其在储能装置宽电压变化时导通损耗大、难以实现宽负载范围软开关等问题，研究适合全电装甲车辆电源系统中不同电压等级和工况的 “集成辅助单元组合双有源桥DC-DC变换器”和“电流波形诱导梯形波双有源桥DC-DC变换器”的电路拓扑、调制策略和控制方法。拟提出多调制模态在不同蓄电池电压和负载功率时的优化调制和统一控制策略，并提出不同调制模态下双有源桥变换器的通用设计思路和方法，实现变换器导通损耗和软开关的全局优化，且在不同模式之间实现平滑切换。通过变换器参数设计，拟提出分模态近似梯度的控制器参数设计方法，实现双有源桥DC-DC变换器不同模态切换的快速动态响应和稳定控制。项目成果将为双向DC-DC变换器在全电装甲车辆电源系统中的研究和技术水平提供有力的支撑。

储能系统在电动汽车、微电网和全电武器系统中的应用，必须依靠双向DC-DC变换器的支撑。针对传统的双有源桥DC-DC变换器在储能装置宽电压变化时导通损耗大、难以实现宽负载范围软开关等问题，研究 “集成辅助单元的双有源桥DC-DC变换器”、“双有源桥DC-DC变换器全局优化模态及平滑切换策略”、“双有源桥DC-DC变换器前馈及模型预测控制”。提出了多调制模态在不同蓄电池电压和负载功率的优化调制和统一控制策略，并提出不同调制模态下双有源桥变换器的通用设计思路和方法，实现变换器导通损耗和软开关的全局优化，且在不同模式之间实现平滑过度切换。前馈控制和参数辨识实现了双有源桥DC-DC变换器不同模态下的快速动态响应和稳定性的优化。本项目成果提升了双向DC-DC变换器在工业和军事中的理论和技术水平。