【摘要】 FREEDM是美国北卡大学FREEDM工程研究中心提出的一个全新智能微网模型。首次将FREEDM的先进理念引入国内,对其主要思想和工作原理进行了综述性研究。阐述了FREEDM的系统配置和拓扑结构。介绍了FREEDM组网的关键设备固态变压器和固态断路器,分别分析了其工作原理、拓扑结构和发展方向等。通过Simulink软件的仿真对比分析指出由于含有大量储能元件和电力电子控制回路,固态变压器具有较强的限流作用,总结了FREEDM的短路电流特性。探讨了在FREEDM中应用区域纵联电流差动保护的继电保护策略。更多还原

【Abstract】 FREEDM(Future Renewable Electric Energy Delivery and Management)is a brand-new smart micro-grid model established by the FREEDM System Center at NC State University.This article introduces the advanced concept of FREEDM for the first time to our country.In this paper,the basic principle,system configuration and topology of FREEDM are reviewed and researched,the key networking equipments of FREEDM including SSFID and FID are discussed respectively from the aspects of their working principle,topology and development trend.Through comparative analysis by using Simulink,it is pointed out that SST has a strong current limiting effect because it contains a lot of energy storage device and power electronic control loop.The short-circuit current characteristic of FREEDM is summarized.Finally the protection strategy for the application of regional pilot current differential protection in FREEDM is researched.更多还原