CAREER:Design, Modeling and Control of High Efficiency and High Power Density Multi-port Power Electronics Module for Hybrid Energy Systems

美国和全球对替代和可再生能源发电系统的需求一直在以每年约25%的速度增长。大规模使用替代能源和可再生能源需要新技术，如可靠和高效的电力电子接口，新的系统控制方案以及储能系统。该计划的目标是开发混合能源系统，特别是混合燃料电池系统的创新，以降低上述主题的技术壁垒。智力优势：传统的联合收割机是通过多个独立的直流-直流变换器来将能量源和能量存储元件结合起来，并且大多数研究集中在单个变换器和单任务控制上。从集成控制、高功率密度、低成本和更有效地从各种电源收集功率的观点来看，多端口转换器是有前途的。这些转换器提出了特殊的设计挑战，包括高功率、双向功率流、输入电压的非理想特性、功率处理的集成以及由端口之间的相互作用引起的复杂动态。本论文的主要研究内容包括：（1）采用多相软开关技术设计一种高效率、高功率密度的多端口变换器模块;（2）对变换器、燃料电池、储能器和负载之间的相互作用所引起的复杂行为进行理论分析和动态建模;（3）控制策略设计和数字控制系统的实现;（4）对多端口变换器模块进行数字控制。（4）实现基于可扩展模块的实验研究平台，具有标准化的功率、热和控制接口。通过该实验平台验证了设计、建模和控制的有效性。更广泛的影响：多端口功率转换器不仅可以应用于基于燃料电池的能量系统，而且还可以应用于其他替代和可再生能源，例如具有能量存储元件的光伏和整流风力发电。此外，多端口双向转换器可以接口混合能量存储元件，例如电池和超级电容器，用于脉冲功率要求，具有比单独的单个能量存储更高的比功率和效率、重量、成本和体积减小。因此，它是分布式发电、电动汽车、多电动船舶和全电动船舶的关键使能技术，其中替代能源和储能元件发挥着越来越重要的作用。研究结果将使替代能源和可再生能源的使用更加迅速和广泛，从而大大减少温室气体的排放，降低不可再生燃料的成本，并提高能源安全。摘要：教育计划是建立和提高FAMU-FSU工程学院动力工程领域的研究生和本科生教育质量。这将通过将研究整合到电力课程中，用数字控制设置更新当前的电力实验室，并与机械工程和化学工程部门一起创造多学科教育和设计经验来实现替代能源和储能元件。它还旨在增加电力工程领域代表性不足的少数民族学生和毕业生的人数。PI将从她的研究中提供以电力工程为重点的项目，用于商业和工程暑期培训计划，以吸引高中少数民族学生。PI还将从本科生研究机会计划中招募本科少数民族学生参加研究。研究和教育成果将通过网络课程、网页、发表的文章和开放日示范向公众公布。

The demand for alternative and renewable energy generation systems has been growing in the U.S. and globally at a rate of about 25% per year. The use of alternative and renewable energy sources on a large scale requires new technologies such as reliable and efficient power electronics interface, new system control schemes, as well as energy storage systems. The program goal is to develop innovations in hybrid energy systems, especially the hybrid fuel cell system, to bring down the technology barriers in the above subjects. Intellectual Merits: The traditional method to combine the energy source and energy storage elements is through multiple separate dc-dc converters and most research has focused on single converters and single-task control. The multi-port converter is promising from the viewpoint of integrated control, high power density, low cost and more efficient power harvesting from a variety of power sources. These converters present special design challenges including high power, bidirectional power flow, non-ideal characteristics of input voltages, integration of power processing, and complicated dynamics caused by interactions among the ports. The proposed research tasks include (1) design of a high efficiency, high power density multi-port converter module using multi-phase and soft-switching technology; (2) theoretical analysis and dynamic modeling of the complicated behavior caused by the interaction between the converter, fuel cell, energy storage, and the load; (3) control strategy design and digital control system implementation; and (4) implementation of scalable module based experimental research platform featuring standardized power, thermal, and control interfaces. The validity of design, modeling, and control will be verified through this experimental platform. Broader Impact: The multi-port power converter not only can be applied to fuel cell based energy systems, but also to other alternative and renewable energy sources such as photovoltaic and rectified wind generation with energy storage elements. In addition, the multi-port bidirectional converter can interface hybrid energy storage elements such as batteries and ultracapacitors for pulse power requirement with higher specific power and efficiency, weight, cost and volume reductions than single energy storage alone. Therefore, it is a key enabling technology for distributed generation, electric cars, more-electric craft, and the all-electric ship where alternative energy sources and energy storage elements play an increasingly important role. The research results will enable more rapid and wider usage of alternative and renewable energy, resulting in a significant reduction in the emission of greenhouse gases, reduced costs of non-renewable fuels, and increased energy security. Summary:The educational plan is to build and improve the quality of graduate and undergraduate education in the power engineering area at FAMU-FSU College of Engineering. This will be done by integrating the research into the power curriculum, updating the current power laboratory with digital control setups, and creating a multidisciplinary education and design experience with Mechanical Engineering and Chemical Engineering Departments on alternative energy sources and energy storage elements. It also aims to increase the number of under-represented minority students and graduates in the field of power engineering. The PI will provide power engineering-focused projects from her research for the Business and Engineering Summer Training program to attract high school minority students. The PI will also recruit undergraduate minority students from the Undergraduate Research Opportunity Program to participate in the research. The research and education results will be made public through web-based courses, web pages, published articles and Open House demonstration.