05. - 07.06.2018
PCIM Europe 2018
Power Electronics | Intelligent Motion | Renewable Energy | Energy Management


Oral Session

Multi-Level Converters


Tuesday, 05.06.2018, 14:00 - 15:15 hrs


München 2


Drazen Dujic, Power Electronics Laboratory, EPFL, CH


14:00 Modular Multilevel Converters as Active Filters to Mitigate Low Frequency Current Harmonics in Converter Fed Grid Applications
M.Sc. Dennis Bräckle, Karlsruhe Institute of Technology, Karlsruhe, Deutschland
In grids with decentralized energy production and bidirectional power flow, an increasing numbers of power electronic loads makes power quality an important issue to ensure grid stability. The MMC is highly suitable to meet the requirements of a low Total Harmonic Distortion and voltage stability due to its high quality output voltages. MMCs compensate low frequent grid harmonics. A standalone laboratory scale converter-fed microgrid shows the capability of the developed control algorithms.
14:25 MMC-Based High Power DC-DC Converter Employing Scott Transformer
M.Sc. Stefan Milovanovic, Ecole Polytechnique Federale de Lausanne, Lausanne, Schweiz
So far, Scott Transformer has mostly been employed in the railway applications in order to obtain two separate single-phase AC voltages out of one three-phase voltage source. This paper proposes bidirectional, isolated, high-step down, MMC-based, DC-DC converter intended to connect medium voltage and low voltage DC grids. In order to achieve galvanic separation between medium voltage and low voltage sides of the converter, Scott Transformer was used.
14:50 Experimental Validation of Three-Level Advanced-Active-Neutral-Point-Clamped Converter for Grid Operation
Dr.-Ing. Sidney Gierschner, University of Rostock, Rostock, Deutschland
The three-level AANPC converter represents a multilevel converter with a fault-tolerant behaviour. Furthermore, it has a high degree of modularity. This aspect can be advantageous for the next generation power semiconductor modules. This paper presents the experimental validation of the three-level Advanced-Active-Neutral-Point-Clamped converter for grid operation at safety extra-low voltage level. Also, the interaction of a microcontroller and a FPGA for control and modulation purposes is explained.


Speaker detail

Mr. Dennis Bräckle
M.Sc. Dennis Bräckle
Karlsruhe Institute of Technology, Karlsruhe, Deutschland
Dennis Bräckle graduated from Karlsruhe Institute of Technology (KIT) with a masters' degree in 2014. In January 2015 he started to work as a doctoral candidate at the Institute of Electrical Engineering at KIT in the field of Modular Multilevel Converters. His research interest include new control strategies for MMC for grid for grid applications.
Mr. Sidney Gierschner
Dr.-Ing. Sidney Gierschner
University of Rostock, Rostock, Deutschland
Sidney Gierschner studied Electrical Engineering at the University of Rostock. In 2011 he received his Diploma. Since 2011 he is working at the Institute of Electrical Power Engineering of the University of Rostock. In 2017 he received his PhD.
Mr. Stefan Milovanovic
M.Sc. Stefan Milovanovic
Ecole Polytechnique Federale de Lausanne, Lausanne, Schweiz
Stefan Milovanovic received the Dipl. Ing. and MSc degrees from the University of Belgrade, Belgrade, Serbia, in 2015 and 2016, respectively. Currently, he is pursuing the Ph.D. degree at Power Electronics Laboratory (PEL) at Ècole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland. His interests include High-Power DC-DC conversion.