Power Electronic Converter and Control System Technologies for AC-DC Distribution Systems

交直流配电系统电力电子变换器和控制系统技术

• 批准号: RGPIN-2021-02550
• 负责人: Mohamed, Yasser
• 金额: $ 3.35万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=752202
• 关键词: Power; Electronic; Converter; Control; System

Driven by environmental, economic, and technical concerns, power grids are facing unprecedented pressure to modernize. Power distribution systems are increasingly integrating distributed generation units empowered by renewable energy resources and distributed energy storage units. Most of these resources produce dc power and interfaced to host grids via power electronic converters. Large amounts of energy delivered as ac are now consumed as dc (e.g., electric vehicles and their charging stations, motor drives, data centers, and consumer electronics). To integrate these resources and loads efficiently, distribution systems are evolving to become hybrid ac-dc systems composed of several ac and dc subgrids interconnected via power electronic converters. Power electronics and control systems are the key enablers for ac-dc distribution systems. Existing power electronic converter and control system technologies fall short in several key emerging areas. First, medium-voltage ac-dc distribution systems demand highly efficient, power-dense, fault-tolerant, and scalable power electronic converters with multiple ports for reliable and cost-effective integration of ac and dc terminals. Modular multiport converter topologies have been recently proposed for medium- and high-voltage ac-dc grid applications; however, theory and algorithms for their optimal design, systematic analysis and control design, operation under faults, and integration with renewable and energy storage resources do not exist. Secondly, ac-dc distribution systems will mostly be power electronic converter-dominated grids with faster dynamics and complicated control systems interactions than classical grids. Such interactions are neither understood nor quantified, and, as a result, there are virtually no systematic tools for control systems coordination and instability mitigation. Finally, several system-level real-time control algorithms of next-generation ac-dc distribution systems do not exist. Real-time algorithms for robust energy management, grid fault management via coordinated control of power electronic converters, and cooperative control with transmission network controllers are yet to be developed. The main objective of the proposed research program is to develop improved and new power electronic converter and control system technologies enabling the development of reliable, efficient, and optimally managed ac-dc distribution systems. The fundamental research involving theories in power conversion, modeling, control, and system optimization is expected to advance knowledge, provide training to highly qualified personnel, and provide timely knowledge and solutions to the Canadian industry.

在环境、经济和技术问题的推动下，电网面临着前所未有的现代化压力。配电系统越来越多地集成可再生能源分布式发电单元和分布式储能单元。这些资源中的大多数产生直流电并通过电力电子转换器连接到主电网。以交流电形式提供的大量能量现在以直流电形式消耗（例如，电动汽车及其充电站、电机驱动器、数据中心和消费电子产品）。为了有效地整合这些资源和负载，配电系统正在发展成为由多个通过电力电子转换器互连的交流和直流子电网组成的混合交流-直流系统。 电力电子和控制系统是交流-直流配电系统的关键推动因素。现有电力电子转换器和控制系统技术在几个关键新兴领域存在不足。首先，中压交直流配电系统需要具有多个端口的高效、功率密集、容错和可扩展的电力电子转换器，以实现交流和直流终端的可靠且经济高效的集成。最近，针对中压和高压交直流电网应用提出了模块化多端口转换器拓扑；然而，其优化设计、系统分析和控制设计、故障运行以及与可再生能源和储能资源集成的理论和算法尚不存在。其次，交流-直流配电系统将主要是电力电子转换器主导的电网，与传统电网相比，具有更快的动态性和复杂的控制系统交互。这种相互作用既未被理解也未被量化，因此，实际上没有用于控制系统协调和不稳定缓解的系统工具。最后，下一代交直流配电系统的几种系统级实时控制算法还不存在。用于鲁棒能源管理、通过电力电子转换器协调控制进行电网故障管理以及与输电网络控制器的协调控制的实时算法仍有待开发。 拟议研究计划的主要目标是开发改进的新型电力电子转换器和控制系统技术，从而开发可靠、高效和优化管理的交流-直流配电系统。涉及功率转换、建模、控制和系统优化理论的基础研究有望促进知识进步，为高素质人才提供培训，并为加拿大工业提供及时的知识和解决方案。