用于智能微网的软开关固态变压器及其控制技术研究

项目名称： 用于智能微网的软开关固态变压器及其控制技术研究

项目编号： No.51277115

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 电工技术

项目作者： 王玉斌

作者单位： 山东大学

项目金额： 82万元

中文摘要： 针对现有固态变压器技术用于智能电网中大规模可再生能源接入、互联、双向潮流控制等方面存在的问题，本申请项目提出并研究一种用于智能微网的新型软开关固态变压器拓扑及其控制技术。以基于耦合电感换流的软开关ZVT变换器为重点，研究开发具有新型优化拓扑结构的软开关SST，提出具有可调延时、满足不同输入和负载条件的自适应软开关技术；通过建立新型SST的数学模型，研究SST的各级底层控制策略、级联H桥直流侧电容电压平衡控制策略、双有源H桥的功率平衡控制策略、SST的装置级多目标优化协调控制策略、SST的多层次保护体系和系统"黑启动"控制策略等，为实现可再生能源柔性接入与互联等奠定理论和方法基础，最终形成应用于未来智能微网的SST的系统性和实质性的研究成果。本项目的研究有助于丰富固态变压器技术的先进理论与方法，对促进微电网和固态变压器技术的发展具有重要的理论价值和广阔的应用前景。

中文关键词： 软开关固态变压器；电容电压平衡控制；功率平衡控制；控制策略；智能微电网

英文摘要： A new-type soft-switching solid-state transformer(SST) and its control strategies are put forward and studied in this application project, which is based on the status that some issues could still encounter when current SST is used in smart microgrid for large-scale renewable energy connecting to grid,interconnecting,or bidirection power flow control. A new-type soft-switching SST with optimal topology, which focus on coupled-inductor based soft-switching ZVT converter, and a self-adaptive soft-switching technique with adjustable time-delay and adaptation for different inputs and loads, are first put forward and studied.The control strategies, such as each converter stage control of SST, dc-side capacitor voltage balance control of cascaded H-bridge,power balance control of dual active bridge,Device-level multi-objective optimization coordination control,multi-level protection system and system black start control, are then studied successively based on the new established SST mathematic model. All the research work will form a theoretical and methodological foundation for renewable energy flexible connecting to grid or interconnecting , and the systematic and substantial research achievements of SST used in future smart microgrid will be finally obtained and summarized .The research of this project will help to

英文关键词： Soft-switching Solid-state Transformer；Capacitor Voltage Balance Control；Power Balance Control；Control Strategy；Smart Microgrid