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C3 Guest Lecture Series

Advanced Medium-Voltage Bidirectional DC-DC Conversion Systems for Future Electric Energy Delivery and Management System
Hui (Helen) Li
Dr. Li received her Ph.D. degree in Electrical Engineering from the University of Tennessee, Knoxville in 2000. Currently she is a professor of Electrical and Computer Engineering Department, FAMU-FSU college of Engineering. Her research interests include dc-dc converters, cascaded multilevel inverters, as well as power electronics applications on electric vehicle and distributed renewable energy systems. She has received NSF Career Award in 2007. Recently, a power electronics research team led by her is a part of next generation WBG power electronics institute ($140 million) announced by President Obama on Jan 15.
Medium-voltage bidirectional dc-dc converters can be applied as solid state transformer in the future renewable energy based distribution systems to integrate distributed renewable energy source with existing power grid, realize intelligent energy management, as well as improve power quality. A modular phase-shift dc-dc converter employs zero-voltage-switching (ZVS) technique combined with low voltage MOSFETs to achieve low switching and conduction losses under high frequency operation, therefore to obtain high efficiency and high power density, as well as bidirectional power flow. Another unique advantage of this converter is to allow an identical control for each module therefore provides plug and-play capability, possible high-level fault tolerance, and easy implementation. In addition, the variation of this topology can be adopted to integrate PV with lithium-ioin battery energy storage system with less semiconductor devices which is very attractive to industry and academia for the application and research of incoming new generation PV energy storage system.
Wednesday, May 14, 2014
Larsen 234

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