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Siemaszko Daniel

Professeur HES associé

Main skills

Professeur HES associé

Desktop: B57a

Haute Ecole d'Ingénierie et de Gestion du Canton de Vaud
Route de Cheseaux 1, 1400 Yverdon-les-Bains, CH

Institute
IE - Institut des énergies

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2024

Continuous time simulation and system-level model of a MVDC distribution grid including SST and MMC-based AFE

Scientific paper ArODES

Daniel Siemaszko, Mauro Carpita

Electronics, 2024, 13, 11, 2193

Link to the publication

Summary:

Medium-voltage DC (MVDC) technology has gained increasing attention in recent years. Power electronics devices dominate these grids. Accurate simulation of such a grid, with detailed models of switching semiconductors, can quickly became very time-consuming, according to the number of connected devices to be simulated. A simulation approach based on interactions on a continuous time model can be very interesting, especially for developing a system-level control model of such a modern MVDC distribution grid. The aim of this paper is to present all the steps required for obtaining a continuous time modelling of a +/−10 kV MVDC grid case study, including a solid-state transformer (SST)- and modular multilevel converter (MMC)-based active front end (AFE). An additional aim of this paper is to supply educational content about the use of the continuous time simulation approach, thanks to a detailed description of the various devices modelled into the presented MVDC grid. The results of a certain number of simulation scenarios are eventually presented.

2019

Small-scale modular multilevel converter for multi-terminal DC networks applications :

Book chapter ArODES

system control validation

Elie Talon Louokdom, Serge Gavin, Daniel Siemaszko, Frédéric Biya-Motto, Bernard Essimbi Zobo, Mario Marchesoni, Mauro Carpita

Dans Grandi, Gabriele, Ruderman, Alex, Multilevel converters : analysis, modulation, topologies, and applications (pp. 487-505). 2019, Basel, Beijing, Wuhan, Barcelona, Belgrade : MDPI

Link to the publication

Summary:

This paper presents the design and implementation of a digital control system for modular multilevel converters (MMC) and its use in a 5 kW small-scale prototype. To achieve higher system control reliability and multi-functionality, the proposed architecture has been built with an effective split of the control tasks between a master controller and six slave controllers, one for each of the six arms of the converter. The MMC prototype has been used for testing both converter and system-level controls in a reduced-scale laboratory set up of a Multi-Terminal DC transmission network (MTDC). The whole control has been tested to validate the proposed control strategies. The tests performed at system level allowed exploration of the advantages of using an MMC in a MTDC system.

2018

Small-scale modular multilevel converter for multi-terminal DC networks applications :

Scientific paper ArODES

system control validation

Elie Talon Louokdom, Serge Gavin, Daniel Siemaszko, Frédéric Biya-Motto, Bernard Essimbi Zobo, Mario Marchesoni, Mauro Carpita

Energies, 2018, 11, 7, 1690

Link to the publication

Summary:

2015

Fast sorting method for balancing capacitor voltages in modular multilevel converters

Scientific paper ArODES

Daniel Siemaszko

IEEE Transactions on Power Electronics, 30, 1, 463-470

Link to the publication

Summary:

The modular multilevel converter (MMC) is attracting more and more interest in high-power and high-voltage applications. Highly redundant, each arm of the converter is made of a large number of identical submodules with inner storage capability allowing to reach very high voltage without dc-link capacitor. The control of such a converter represents a challenge when it comes to the implementation of an MMC with a large number of submodules, namely in distributing the control tasks and handling the communicated values in-between controllers and submodules. This paper presents the details of an innovative submodule selection method for the submodule capacitor's voltage balancing within one arm of an MMC. “The Tortoise and the Hare” sorting method shows very fast response, high reliability, and its implementation suits a large number of implemented submodules as for high-voltage dc applications. The proposed submodule capacitor's balancing method is validated on a three-phase 10-kVA prototype with five submodules per arm.

2011

Open-loop control of modular multilevel converters using estimation of stored energy

Scientific paper ArODES

Lennart Ängquist, Antonios Antonopoulos, Daniel Siemaszko, Kalle Ilves, Michail Vasiladiotis, Hans-Peter Nee

IEEE Transactions on Industry Applications, 47, 6, 2516-2524

Link to the publication

Summary:

The internal control of a modular multilevel converter aims to equalize and stabilize the submodule capacitor voltages independent of the loading conditions. It has been shown that a submodule selection mechanism, included in the modulator, can provide voltage sharing inside the converter arm. Several procedures for controlling the total stored energy in each converter arm exist. A new approach is described in this paper. It is based on estimation of the stored energy in the arms by combining the converter electromotive force reference, the measured alternating output current, and the known direct voltage. No feedback controllers are used. Experimental verification on a three-phase 10 kVA prototype is presented along with the description of the new procedure.

Single-Phase Resonant $LC$ Circuit Using a Bank of Self-Switched Capacitors

Scientific paper ArODES

Daniel Siemaszko, Christian Rod, Alfred C. Rufer

IEEE Transactions on Industrial Electronics, 58, 9, 4175-4184

Link to the publication

Summary:

This paper presents a preliminary work on the feeding of an ac dipole using a resonant circuit with a varying resonant frequency. A single-phase LC oscillator containing a variable capacitor is fed by a wideband amplifier or a voltage source inverter. For this purpose, a bank of switched capacitors of different values are connected to the main circuit through bidirectional switches. In order to allow zero-current and zero-voltage switchings, the devices are implemented with close-control driver circuits, allowing self-switching based on local polarity measurements. An innovative controller for maintaining the current in an oscillator and a regressive method for measuring alternating current with a limited number of samples are proposed and validated by experiment.

2009

Description and efficiency comparison of two 25 kVA DC/AC isolation modules

Scientific paper ArODES

Daniel Siemaszko, Frédéric Zurkinden, Lukas Fleischli, Irma Villar, Yales R. De Novaes, Alfred C. Rufer

EPE Journal, 19, 4, 17-24

Link to the publication

Summary:

In the frame of the European project UNIFLEX-PM, two AC/AC converter topologies have been studied and implemented. Both converters, rated for 25 kVA, are isolated by a medium frequency power transformer. The first topology is based on a dual active bridge containing two additional voltage source inverters for the connection of both DC links to the interfaced grids. The second topology is based on a cycloconverter for the connection of the secondary side of the transformer to the grid without a DC link capacitor. Both topologies have an identical primary side so the efficiency study is focussed on the chain link from one DC link to a 25 kW output load. Experimental efficiencies are compared to theoretical expectations. Due to soft-switching operation in the dual active-bridge, the cycloconverter based solution shows a lower efficiency than in the symmetrical topology.

2024

Enabling MVDC PV collection grids with modular solid state transformers

Conference ArODES

Daniel Siemaszko, Marko Mogorovic

Proceedings of the 6th International Conference on DC Microgrids (ICDCM)

PEOPLE@HES-SO Directory and Skills inventory

Siemaszko Daniel

Professeur HES associé

Main skills

Power Electronics

Hybrid AC/DC micro-grids

Modular Converters

Intermediate Energy Storage

Professeur HES associé

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