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Events at Department of Energy Technology

Guest lecture by Professor Axel Mertens


27.01.2020 kl. 10.00 - 11.00


There will be a guest lecture on January 27 prior to the PhD defence of Yi Zhang


Control of Modular Multilevel Converters for Reduced Energy Storage Requirements


Prof. Axel Mertens, Leibniz University Hannover, Germany


10:00 -11:00


The presentation will include two parts:

1. Research on Power Electronics and Drives at Leibniz University Hannover

This presentation will introduce Leibniz University of Hannover as an academic institution in Germany with a strong research focus on science and technology. The research on energy technologies and especially on power electronics and electric drives is covered in more detail.

2. Control of Modular Multilevel Converters for Reduced Energy Storage Requirements

MMC topologies are suitable for many applications especially at medium and high voltages. They have been introduced first for fixed-frequency grid-tied applications were low THD is crucial. When operating on variable-frequency loads like electric drives, the energy storage requirement is increased inversely proportional to the frequency if constant torque is targeted. On the other hand, the THD is not so important for drives. A novel mode of operation has been proposed and investigated by our research group that reduces the energy storage requirement by more than one order of magnitude, while compromising only on the THD. Recent results and extensions on this mode of operation are presented.

About the lecturer

Axel Mertens received his Ph.D. in 1992 from RWTH Aachen University of Technology. After an industrial career of more than 10 years in the field of medium voltage drives, he was appointed Professor for Power Electronics and Drive Control at Leibniz University Hannover in 2004. He is the Director of the Institute of Drive Systems and Power Electronics called IAL. He served as Dean of the Department of Electrical Engineering and Computer Science, as Spokesman of the Energy Research Center of Leibniz University Hannover called LiFE 2050, and as a consultant to various Fraunhofer Institutes. He is associate editor of the Transactions on Power Electronics, Member of the Administrative Committee of IEEE Power Electronics Society, and Member of the Executive Council of EPE Association.

THE guest lecture WILL TAKE PLACE in Pon 111 in room 1.177 and aLL are welcome


Department of Energy Technology


Pontoppidanstræde 111, auditorium 1.177