Publications by Alexandre François Christe

Auxiliary Submodule Power Supply for a Medium Voltage Modular Multilevel Converter

Alexandre François Christe, Marko Petkovic, Drazen Dujic, Milan Utvic, Ignacio Alejandro Polanco Lobos

2019

Swiss Competence Center on Energy Research FURIES - Overview and Contributions in the Area of Power Electronics and Smart Grids

Farhad Rachidi-Haeri, Mario Paolone, Jin Wang, Alexandre François Christe, Reza Razzaghi, Drazen Dujic, Mauro Carpita, Stefan Milovanovic, Milan Utvic

This paper introduces a special session on results of the Swiss competence center on energy research FURIES that has been established in coordination with the Swiss Energy strategy 2050 with the specific aim to develop, promote and deploy power grid-relate ...

2019

Modular Multilevel Converter Control Methods Performance Benchmark for Medium Voltage Applications

Alexandre François Christe, Drazen Dujic

2018

Galvanically Isolated Modular Converter

Alexandre François Christe

The ever increasing penetration of renewable energy systems in the distribution grids will inevitably require profound changes in the grid infrastructure. One emerging direction, the medium voltage dc (MVdc) grids, is the cornerstone of this work. They are ...

EPFL2018

Virtual Submodule Concept for Fast Semi-Numerical Modular Multilevel Converter Loss Estimation

Alexandre François Christe, Drazen Dujic

During the design phase of a modular multilevel converter (MMC), an accurate loss evaluation of the submodule (SM) plays an important role. In this paper, a method based on the analytical description of the MMC key waveforms that allows to directly obtain ...

Institute of Electrical and Electronics Engineers2017

Novel Insight into the Output Current Ripple for Multilevel and Multiphase Converter Topologies

Alexandre François Christe, Drazen Dujic

When it comes to the computation / estimation of the switching losses in a multilevel converter, it is crucial to know the instantaneous value of the output current. If the average output current value is used instead, there is a non negligible error when ...

2017

Virtual Submodule Concept Applied to the Modular Multilevel Converter

Alexandre François Christe, Drazen Dujic

The design phase of a modular multilevel converter (MMC) needs to be supported by suitable tools for the submodule loss evaluation. This paper proposes a fast MMC cell loss calculation based on the virtual submodule (VSM) concept. Compared to other propose ...

VDE VERLAG GMBH, 20172017

Interactions Between Bandwidth Limited CPLs and MMC Based MVDC Supply

Alexandre François Christe, Uzair Javaid, Drazen Dujic, Francisco Daniel Freijedo Fernández

With the improvement in the power electronic technologies, medium voltage dc (MVDC) electrical distribution systems are being considered for on-shore and off-shore applications. These future MVDC electrical distribution systems are expected to provide the ...

2017

Insulation Coordination for a Modular Multilevel Converter Prototype

Alexandre François Christe, Émilien Luc Henri Coulinge, Drazen Dujic

This paper provides a detailed overview of the dielectric design and insulation coordination applied to a medium voltage modular multilevel converter prototype. The complete system has ratings of 0.5 MVA and is designed for connection to a 10 kVdc supply w ...

Ieee2016

Galvanically Isolated Modular Converter

Alexandre François Christe, Drazen Dujic

Direct current (DC) electrical grids are already a reality in low voltage (LV) telecom distribution systems and point-to-point high voltage DC transmission. Medium voltage (MV) domain, despite its big potential, still suffers from a lack of suitable conver ...

Inst Engineering Technology-Iet2016

Electro-Thermal Design of a Modular Multilevel Converter Prototype

Alexandre François Christe, Émilien Luc Henri Coulinge, Drazen Dujic

This paper describes the electro-thermal design of a medium voltage modular multilevel converter prototype, from the submodule power semiconductor thermal requirements to the overall system level integration. The high number of semiconductors and capacitor ...

VDE VERLAG GMBH2016

On the integration of low frequency transformer into modular multilevel converter

Alexandre François Christe, Drazen Dujic

Various high power applications require power converters with large voltage step ratios, easily achieved by inclusion of a single or multiple transformers, which provide galvanic isolation at the same time. This paper presents, in a systematic manner, the ...

IEEE2015

State-space modeling of modular multilevel converters including line frequency transformer

Alexandre François Christe, Drazen Dujic

This paper presents a detailed state-space modeling of a Modular Multilevel Converter (MMC) in combination with line frequency transformer (LFT). The classical MMC topology is compared with the recently proposed Open-End Winding MMC (OEWMMC) topology, whic ...

2015