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Drazen Dujic

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Publications associées (209)

Flexible Medium Voltage DC Source Utilizing Series Connected Modular Multilevel Converters

Drazen Dujic, Stefan Milovanovic, Milan Utvic

This paper presents the converter configuration acting as a medium voltage DC source. In order to obtain desired voltage across the DC terminals, two series connected modular multilevel converters are used. The use of modular multilevel converters results ...

IEEE2019

On Facilitating the Modular Multilevel Converter Power Scalability Through Branch Paralleling

Drazen Dujic, Stefan Milovanovic

Modular multilevel converter current scalability challenge can be significantly alleviated by connecting its branches in parallel. In case a predefined submodule design is to be used with the aim of serving a certain span of applications, methods of achiev ...

IEEE2019

Soft-Switching Resonant Conversion with IGCT

Drazen Dujic, Dragan Stamenkovic

2019

100kW, 10kHz Medium Frequency Transformer Design Optimization and Experimental Verification

Marko Mogorovic, Drazen Dujic

This paper describes a novel, model based, design optimisation methodology for high-power medium frequency transformers for medium-voltage high-power electronic applications, namely emerging solid state transformers. Presented procedure enables the designe ...

2019

Comparison of two Modular Multilevel Converter Internal Energy Balancing Methods

Drazen Dujic, Stefan Milovanovic, Miodrag Basic

Although challenging, control of the modular multilevel converter internal variables has been addressed using several different approaches so far. With the aim of maintaining the submodules’ energies within a predefined band, the socalled circulating curre ...

IEEE2019

Marine DC Power Ditribution Networks

Drazen Dujic, Gabriele Ulissi, Seongil Kim

2019

Multiport Energy Gateway

Yan-Kim Tran, Drazen Dujic, Francisco Daniel Freijedo Fernández

2019

Low Voltage Modular Multilevel Converter Submodule for Medium Voltage Applications

Drazen Dujic, Milan Utvic, Ignacio Alejandro Polanco Lobos

2019

Open-Loop Power Sharing Characteristic of a Three-Port Resonant LLC Converter

Yan-Kim Tran, Drazen Dujic, Francisco Daniel Freijedo Fernández

The Solid State Transformer (SST) is an attractive solution for highly flexible, cost-effective, compact and efficient power transfer among different grids. Furthermore, a three-port topology is proven as a suitable solution to integrate energy storage res ...

2019

IGCT Low-Current Switching – TCAD and Experimental Characterization

Drazen Dujic, Dragan Stamenkovic

Utilization of the Integrated Gate Commutated Thyristor as a semiconductor switch in the Series Resonant Converter for isolated medium voltage DC-DC conversion offers an opportunity for high conversion efficiency while operating at the high switching frequ ...

2019

Flexible Medium Voltage DC Source Utilizing Series Connected Modular Multilevel Converters

Drazen Dujic, Stefan Milovanovic, Milan Utvic

2019

Computationally Efficient Estimation of the Electric-Field Maximums for the MFT Insulation Coordination

Marko Mogorovic, Drazen Dujic

This paper proposes a methodology for computationally-efficient estimation of the local E-field maximums within the transformer winding insulation material for design optimization purposes, where besides the estimation accuracy, the computational cost repr ...

IEEE2019

Protection Coordination in DC Shipboard Power Systems: Challenges, Current Status and New Technologies

Drazen Dujic, Seongil Kim

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

Modeling and Experimental Verification of Geometry Effect on Core Losses

Marko Mogorovic, Drazen Dujic

2019

Leakage Flux Modeling of Medium-Voltage Phase-Shift Transformers for System-Level Simulations

Drazen Dujic, Min Luo, Jost Allmeling

2018

High Power Electronics Innovation Perspectives for Pumped Storage Power Plants

Pedro Camilo de Oliveira e Silva, Drazen Dujic, Miodrag Basic

The current framework of high penetration of intermittent energy sources requires variable-speed pumped hydro storage power plants (PHSPs) to provide grid support functions, which are, in this case, achieved through two technologies: doubly-fed induction m ...

2018

Modeling Frequency Independent Hysteresis of Ferrite Core Materials using Permeance-Capacitance Analogy for System-Level Circuit Simulations

Drazen Dujic, Min Luo, Jost Allmeling

2018

Modeling Frequency Dependent Core Loss of Ferrite Materials using Permeance-Capacitance Analogy for System-Level Circuit Simulations

Drazen Dujic, Min Luo, Jost Allmeling

2018

Modular Multilevel Converter Control Methods Performance Benchmark for Medium Voltage Applications

Alexandre François Christe, Drazen Dujic

2018

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