Development of new power decoupling and pulse energy modulation technologies for single-phase distributed generation inverters

单相分布式发电逆变器新型功率解耦和脉冲能量调制技术开发

• 批准号: RGPIN-2017-05945
• 负责人: Chang, Liuchen
• 金额: $ 3.42万
• 依托单位: University of New Brunswick
• 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=752058
• 关键词: Development; new; power; decoupling; pulse

Distributed generation (DG) systems using renewable energy are increasingly penetrating into mainstream power systems. Many small distributed generation systems are connected to single-phase grids. These small DG systems (PV, wind systems etc.) all require single-phase grid-connected inverters. For single-phase systems, there is a mismatch between the desired constant power drawn from distributed energy resources (PV, wind), and the required pulsating instantaneous power feeding to the single-phase grid. The mechanism which provides the difference between the constant source power and the pulsating grid instantaneous power is referred to as “power decoupling”. Innovative power decoupling technologies are needed to replace traditional large and unreliable electrolytic capacitors with film capacitors with a comparable life-span with DG systems. This project proposes to develop a new power decoupling topology using small film capacitors and active semiconductor devices, and to advance a new modulation concept called “pulse energy modulation (PEM)” for single-phase grid-connected inverters. The developed technologies will lead to the replacement of traditional large electrolytic capacitors in inverter dc link with small film capacitors actively controlled by power semiconductor devices, and lead to advanced pulse modulation methodologies for inverters with enhanced immunity to dc voltage variations and grid harmonics. This will result in increased reliability and enhanced power quality of single-phase grid-connected DG inverters. The project will have four tasks: (1) Develop Power Decoupling Theory and Operating Principles for the New Inverter; (2) Develop PEM Algorithm for Bridge Inverters; (3) Verification of the Proposed Inverter Topology and PEM Control; and (4) Performance Evaluation of the Proposed Inverter Topology and PEM Control. Opportunities for patent filing and technology transfer will be exploited at the latter stage of the project. The project will provide hands on training for two PhD students and one postdoctoral fellow (PDF).

利用可再生能源的分布式发电系统正日益渗透到主流电力系统中。许多小型分布式发电系统连接到单相电网。这些小型DG系统（PV、风力系统等）都需要单相并网逆变器。对于单相系统，从分布式能源（光伏、风能）汲取的所需恒定功率与向单相电网馈送的所需脉动瞬时功率之间存在不匹配。提供恒定源功率与脉动电网瞬时功率之间的差的机制被称为“功率解耦”。需要创新的电源去耦技术，以取代传统的大型和不可靠的电解电容器与薄膜电容器具有可比的寿命与DG系统。本项目提出开发一种使用小型薄膜电容器和有源半导体器件的新型功率解耦拓扑结构，并提出一种用于单相并网逆变器的称为“脉冲能量调制（PEM）”的新调制概念。所开发的技术将导致取代传统的大型电解电容器在逆变器直流环节与小薄膜电容器主动控制的功率半导体器件，并导致先进的脉冲调制方法的逆变器具有增强免疫力的直流电压变化和电网谐波。这将提高单相并网DG逆变器的可靠性和提高电能质量。该项目将有四个任务：（1）开发新逆变器的功率解耦理论和工作原理;（2）开发桥式逆变器的PEM算法;（3）验证拟议的逆变器拓扑结构和PEM控制;以及（4）拟议的逆变器拓扑结构和PEM控制的性能评估。在项目的后期阶段，将利用专利申请和技术转让的机会。该项目将为两名博士生和一名博士后研究员提供实践培训（PDF）。