讲座时间：2016年4月29日上午10：00 地点：61#3160 摘要：Multilevel Converters (MLC) represent a viable and attractive solution in those applications requiring high power, high voltage and reduced harmonics content operations. Recently, they are gaining popularity in a significant number of new applications, including photovoltaic inverters, Power Factor Controllers, D-STATCOM, Solid State Transfomers and many others. Their power level is growing up or going down due to specific application, demonstrating unusual flexibility even at low power. One key point in multilevel converters, is its capability to reduce harmonic signals from currents and voltages. In most conventional multilevel converters, modulation patterns are imposed by complex modulation algorithms consisting of preliminary off-line computations and subsequent real-time application of patterns through look up tables. Obviously, with this approach, converters are affected by significant limitations, in particular, they need large amount of memory space to store the large look-up tables, could have limited precision in determination of commutation angles and are not very flexible for closed loop operations. During last few years, the speaker and his group, have developed a significant research activity aiming at developing analytical methods for harmonic elimination or mitigation in cascaded multilevel converters. The advances of this approach are significant, among them: exact problem formulation, easy real-time implementation of the modulation algorithm with conventional microcontrollers; selective harmonic elimination or harmonics mitigation; possibility to cascade modulator and outer loops as well. During the speech, a description of the method and its fundamental equations are given, then some examples of real implementations are shown in order to demonstrate the effectiveness of the approach. 讲座人简介： Carlo Cecati (IEEE Fellow, class 2006) was graduated in Electrical Engineering from the University of L’Aquila, L’Aquila, Italy in 1983. From 1983 to 1987 he was a consultant and a research fellow. In 1987, he joined the University of L’Aquila, L’Aquila, Italy, where, since 2006, he has been a Full Professor of Converters, Electrical Machines and Drives. He served his university in various capacities, including as a rector’s delegate. Since September 2015, he has been appointed distinguished professor (1000 Talents Plan for High Level Foreign Experts) at Harbin Institute of Technology (HIT), Harbin, P.R. China. From August 2014 to August 2015, he was Chief International Academic Adviser of the same university. His research and technical interests fall in the area of renewable energies and energy saving, in particular the application of power electronics to renewable energy systems, distributed generation, smart grids, electrical drives, electric vehicles. Carlo Cecati received three best paper awards from IEEE journals. From 2013 to 2015 he has been the Editor in Chief of the IEEE Transactions on Industrial Electronics; previously, from 2009-2012, he has been a Co-Editor-in-Chief. Currently he is the General Chairman of the conference IEEE IECON 2016 which will be held next october in Florence, Italy.
