Drazen Dujic

About
Privacy
Disclaimer

Graph Chatbot

Related publications (209)

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

Permeance Based Modelling of the Core Corners Considering Magnetic Material Nonlinearity

Drazen Dujic, Min Luo

Lumped magnetic circuit provides possibility for fast transient simulation of magnetic component together with power electronics circuit. The simplified geometry representation however is not able to completely reflect the real field distribution, especial ...

2015

MVDC Marine Electrical Distribution: Are we ready?

Uzair Javaid, Drazen Dujic, Wim Van der Merwe

Marine high-power on-board electrical systems are predominantly utilizing three-phase medium voltage alternating current (MVAC) distribution. Depending on the size and purpose of the ship, on-board electrical systems provide supply to loads in excess of 60 ...

2015

Isolated DC/DC Structure Based on Modular Multilevel Converter

Alfred Rufer, Stephan Kenzelmann, Drazen Dujic

In the future, new aspects from decentralized generation using different dc voltage levels are expected to influence the general concept of power exchange. Converter are needed to adapt the voltage between low voltage (LV), medium voltage (MV), and high vo ...

Ieee-Inst Electrical Electronics Engineers Inc2015

Arbitrary order generalized state space average modeling of switching converters

Uzair Javaid, Drazen Dujic

Generalized State Space Average Modeling (GSSAM), of switching converters, offers an opportunity to improve fidelity of a model by inclusion of different harmonic components. Yet, the inclusion of each frequency component contributes to an increase in the ...

IEEE2015

Modular DC/DC Converter: Comparison of Modulation Methods

Alfred Rufer, Stephan Kenzelmann, Drazen Dujic

This paper presents a bidirectional modular DC/DC converter. It consists of two Modular Multilevel Converters (MMC) linked by a transformer to achieve galvanic isolation. This topology serves as “DC transformer” interfacing low and medium voltage DC grids. ...

2012

Soft switching characterization of a 6.5kV IGBT for high power LLC resonant DC-DC converter

Drazen Dujic

Medium voltage (MV) high power applications are usually realized using high voltage semiconductors (3.3kV and above) operated in hard switching mode with low switching frequencies (several hundreds of Hz). However, for high power DC-DC converters employing ...

VDE2012

A versatile DC/DC converter based on Modular Multilevel Converter for energy collection and distribution

Alfred Rufer, Stephan Kenzelmann, Drazen Dujic

A topology based on the Modular Multilevel Converter (MMC) is presented, using two MMC linked by a medium frequency transformer. The back to back structure proves to have effective circuit breaker properties and reduced passive components. Due to the adopt ...

2011

A Versatile DC-DC Converter for Energy Collection and Distribution using the Modular Multilevel Converter

Alfred Rufer, Stephan Kenzelmann, Michail Vasiladiotis, Drazen Dujic

The drawbacks of conventional Modular Multilevel Converters (MMC) are described in terms of short-circuits. The configuration of MMC-transformer-MMC proves to handle short-circuits at the input and output without the need for additional DC or AC circuit br ...

Ieee2011

Page 11 of 11