EAGER: Ultra-Efficient, Scalable, and Fault-Tolerant DC-DC Converters for Medium/High-Voltage Applications

EAGER：适用于中/高压应用的超高效、可扩展和容错DC-DC转换器 随着分布式能源开发需求的不断增长以及对动态可重构电网的需求， 随着对功率密度、可靠性和效率要求的提高，直流（DC）电源系统的概念正在获得牵引力。由直流输电和配电实现的更低损耗和更高功率密度激发了高压和中压直流输电和配电系统的进一步实施。据设想，直流电网将提高传统电网的功能性、稳定性和可靠性，同时降低转换损耗和投资成本。 设想的直流电网不一定处于相同的电压电平，并且它们向未来电网的扩展需要超高效、可扩展、功率密集和容错的中压和高压dc-dc功率转换器，其将在连接在不同电压电平下操作的两个或更多个直流系统时实现电压匹配。本研究的目的是实现一类新的直流-直流转换器，推动效率，可扩展性，功率密度和容错/可靠性的边界，并加快进一步扩大直流电网。为此，两个新的有前途的转换器拓扑结构，一个基于电压源转换器的概念，另一个基于电流源转换器的概念，充分探讨。该项目将专注于这些转换器拓扑的建模、分析、控制、短路故障保护和设计优化，展示实现紧凑、超高效、功率密集和嵌入式故障阻断功能等目标的能力。拟议的教育活动将有助于教育和装备下一代电力工程师/科学家所需的知识和技能，以解决能源chal. This奖项反映了NSF的法定使命，并已被认为是值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估的支持。

EAGER: Ultra-Efficient, Scalable, and Fault-Tolerant DC-DC Converters for Medium/High-Voltage Applications With the growing demand for exploiting distributed energy resources and the need for dynamic and reconfigurable power grids with ever increasing power density, reliability, and efficiency requirements, the concept of direct current (dc) power systems is gaining traction. Lower losses and higher power densities enabled by dc power transmission and distribution has sparked further implementation of high-voltage and medium-voltage dc transmission and distribution systems. It is envisioned that the dc grids will improve functionality, stability, and reliability of the legacy power grid while simultaneously decreasing the conversion losses and investment cost. The envisioned dc grids are not necessarily at the same voltage level and their expansion towards the future grid calls for ultra- efficient, scalable, power-dense and fault-tolerant medium- and high-voltage dc-dc power converters, which will enable voltage matching when connecting two or more dc systems operating at different voltage levels. The objective of this research is to realize a new class of dc-dc converters, which pushes the boundaries of efficiency, scalability, power density and fault tolerance/reliability and expedites further expansion of dc grids. To this end, two new promising converter topologies, one based on the voltage-sourced converter concept and the other one based on the current-sourced converter concept, are fully explored. The project will focus on modeling, analysis, control, short-circuit fault protection, and design optimization of these converter topologies, demonstrating the ability to achieve the objectives including compact, ultra-efficient, power dense, and embedded fault blocking capability. The proposed educational activities will help educate and equip next-generation power engineers/scientists with the required knowledge and skills to tackle energy chalThis award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.