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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.

2025

Experimental insights into the MW Range dual active bridge with silicon carbide devices

Conference ArODES

Stefanie Heinig, Daniel Siemaszko, Remo Baumann, Noemi Hubatka, Martin Klaeusler, Raul Ruiz, Ralph Burkart, ChunMing Yuan

International Power Electronics Conference (IPEC-Himeji 2022 - ECCE Asia)

Link to the conference

Summary:

Alongside the resonant topology of the Power Electronics Transformer, the Dual Active Bridge is one potential topology candidate for various LVDC and MVDC applications. For its study purpose, a 0.55 MW converter unit was built featuring the latest inhouse developed Medium Frequency Transformer operated by SiC LinPak semi-conductor devices. Main interest focusses on maximizing its efficiency in various operating points. The converter is experimentally demonstrated with two cells operated in back-to-back configuration.

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)

Link to the conference

Summary:

Solar energy is typically collected through AC grids because of strong reliability and availability of standard solutions. The introduction of Solid State Transformers may not only allow reducing footprint and losses, but also implement peak shaving capabilities and the injection to MVDC grids directly. This work proposes an innovative PV energy collecting strategy with modular isolated DC/DC converters.

2023

System modelling and reliability study of the tri-port SST featuring energy storage and distributed redundancy for data centers

Conference ArODES

Daniel Siemaszko, Marko Mogorovic

Proceedings of 25th European Conference on Power Electronics and Applications (EPE'23 ECCE Europe)

Link to the conference

Summary:

DC powered Data Centers may profit from the proposed Tri-Port SST with UPS for linking MVDC distribution and LVDC bus to IT loads. The solution shows benefits in terms of reliability and efficiency and reduces the number of conversion stages. This work gives demonstrative figures and system level modelling details.

MVDC distribution concept for green data centers :

Conference ArODES

achieving the sustainability roadmap with highest efficiency

Daniel Siemaszko, Stefanie Heinig, Javier Iglesias, Marko Mogorovic

Proceedings of PCIM Europe 2023

Link to the conference

Summary:

This paper proposes a DC electric energy distribution scheme for data centers. Most state-of-the-art data centers use AC distribution at all voltage levels, from MV at the feeder substation down to the 380 VAC indoor distribution level for direct connection of IT racks. This paper provides a DC distribution scheme that is equivalent to state-of-the-art AC distribution systems in terms of specific and very stringent availability and reliability requirements. It features significant benefits in terms of efficiency and controllability and focuses specifically on the integration of solar power, fuel cells, and battery-based UPS, with the MV Solid State Transformer (“SST”) as the enabling technology. The proposed DC distribution scheme provides flexible solution for future green data centers committed to the 2030 Sustainability Roadmap – 100% supply from renewable energy sources at any hour.

2017

Use of modular multilevel converter in multi-terminal DC transmission network :

Conference ArODES

reduced scale set-up and experimental results

Elie Talon Louokdom, Daniel Siemaszko, Serge Gavin, David Leu, Patrick Favre-Perrod, Mauro Carpita

Proceedings of 2017 19th European Conference on power Electronics and Applications (EPE'17 ECCE Europe), 11-14 September 2017, Warsaw, Poland

Link to the conference

Summary:

In the frame of a collaboration project within Swiss Competence Centre for Energy Research, a Multi Terminal DC pilot has been implemented. For the interaction with the medium voltage AC grid, a Modular Multilevel Converter has been designed for its features in low harmonic content, scalability, and flexibility. The control of converters in the MTDC network implements a non-dead band voltage control. The Energy buffering of the MMC converter will allow the converter to sustain either AC or DC grids. The operation of the MMC converter in an MTDC network containing three converter is verified experimentally in a reduced-scale pilot.

2016

Implementation and experimental set-up of a modular multilevel converter in a multi terminal DC/AC transmission network

Conference ArODES

Daniel Siemaszko, Elie Talon Louokdom, Hervé Parisod, Jonathan Braun, Serge Gavin, Loïc Eggenschwiler, Patrick Favre-Perrod, Mauro Carpita

Proceedings of 2016 18th European Conference on Power Electronics and Applications (EPE'16 ECCE Europe), 5-9 September 2016, Karlsruhe, Germany

Link to the conference

Summary:

In this paper the realization of a Multi Terminal DC pilot is presented. For the interaction with the medium voltage AC grid, a Modular Multilevel Converter has been designed for its features in low harmonic content, scalability, and flexibility. The Energy buffering of the converter will allow the converter to sustain either AC or DC grids. The operation of the converter is simulated together with the first experimental results of the implementation.

Design and implementation of a multi-dsp based digital control system architecture for modular multilevel converters

Conference ArODES

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

Proceedings of 2016 IEEE International Power Electronics and Motion Control Conference (PEMC), 25-28 September 2016, Varna, Bulgaria

Link to the conference

Summary:

This paper presents the design and implementation of a digital control system for modular multilevel converters, based on digital signal processors. To achieve higher system control reliability and multi-functionality, the proposed architecture has been built with an effective split of the control tasks involved between a master controller and six slave controllers, one for each of the six arms of the converter. The master controller handles energy flow within the converter and user communication using Ethernet and universal serial bus. Each slave controller handles capacitors voltages balancing within the arm. Intercommunication between the different boards is achieved mainly through optical fiber and inter-integrated circuit bus. Experiments have been carried out to verify the effectiveness of this architecture.

2015

Conception of a modular multilevel converter in a multi-terminal DC/AC transmission network

Conference ArODES

Daniel Siemaszko, Mauro Carpita, Patrick Favre-Perrod

Proceedings of 2015 17th European Conference on Power Electronics and Applications (EPE'15 ECCE-Europe), 8-10 September 2015, Geneva, Switzerland

Link to the conference

Summary:

In the frame of a collaboration project within Swiss Competence Centre for Energy Research in the Future Swiss Electrical Infrastructure section, a Multi Terminal DC pilot has been implemented for studying the interaction between an HVDC and a high voltage AC grid. For the interaction with the medium voltage AC grid, a Modular Multilevel Converter is being designed for its features in low harmonic content, scalability, and flexibility. The energy buffering of the converter will allow the converter to sustain either AC or DC grids. The operation of the converter is described in details and simulated.

Double-Frame current control with a multivariable PI controller and power compensation for weak unbalanced networks

Conference ArODES

Daniel Siemaszko, Alfred Rufer

Proceedings of CAS - CERN Accelerator School : Power Converters

Link to the conference

Summary:

The handling of weak networks with asymmetric loads and disturbances im- plies the accurate handling of the second-harmonic component that appears in an unbalanced network. This paper proposes a classic vector control approach using a PI-based controller with superior decoupling capabilities for operation in weak networks with unbalanced phase voltages. A synchronization method for weak unbalanced networks is detailed, with dedicated dimensioning rules. The use of a double-frame controller allows a current symmetry or controlled imbalance to be forced for compensation of power oscillations by controlling the negative current sequence. This paper also serves as a useful reminder of the proper way to cancel the inherent coupling effect due to the transformation to the synchronous rotating reference frame, and of basic considerations of the relationship between switching frequency and control bandwidth.

2014

Modular resonant converter for 25kV-8A power supply: design, implementation and real time simulation

Conference ArODES

Daniel Siemaszko, Louis de Mallac, Serge Pittet, Davide Aguglia

Proceedings of 16th European Conference on Power Electronics and Applications 2014

Link to the conference

Summary:

This paper describes the design of a 300kW modular resonant power converter for an application in particle accelerators. The aim of the power supply is to provide a so-called RF cavity with 25kV DC voltage and a current up to 8A. Modular approach is chosen for redundancy and availability. Each module is composed of a resonant tank with a step-up MF transformer with its secondary windings put is series for reaching higher voltages. Full gain is ensured in the full operation frequency range considering component value inaccuracies and ageing of capacitors. The design of the resonant tank is detailed with its dimensioning and integration issues. Hardware in the loop validation of two control methods is done on one 100kW module to prepare experimental validation of a single module before implementing the full system.

2013

Operation of modular multilevel converters under grid asymmetries

Conference ArODES

Michail Vasiladiotis, Nicolas Cherix, Daniel Siemaszko, Alfred Rufer

Proceedings of 39th Annual Conference of the IEEE Industrial Electronics Society (IECON 2013)

Link to the conference

Summary:

The Modular Multilevel Converter is very likely to operate in a grid-connected mode under asymmetric conditions. Such a converter features several unique characteristics, which make its analysis different from other types of power converters in similar cases. The existence of three independent capacitive phase legs rather than a common DC-link capacitor requires special attention, in terms of stability and component dimensioning. This paper investigates the impact of unbalanced grid conditions on the operation of the Modular Multilevel Converter. The expressions for the branch energy variation are derived assuming that the grid-related quantities can be modeled by means of symmetrical components. Moreover, the effect of circulating current control for capacitive storage reduction as well as DC-link oscillation elimination is also studied. Finally, a control system is proposed and simulation results verify its discrete-time implementation.

Double frame control and power compensation for power converters connected to weak networks with disturbances

Conference ArODES

Daniel Siemaszko

Proceedings of 15th European Conference on Power Electronics and Applications (EPE)

Link to the conference

Summary:

CERN is studying the implementation of high power active front ends, implying the operation of a voltage source inverters connected to a grid that can be considered as weak when compared to the converter nominal power. Proper synchronisation is a key point for current control stability. The handling of networks with asymmetric disturbances implies the accurate handling of the second harmonic component appearing under unbalanced networks by the proper decoupling of the positive and negative sequence of the network voltages and currents. The use of a double frame controller allow the full control of phase current symmetry or the compensation instantaneous active power oscillation.

Power compensation approach and double frame control for grid connected converters

Conference ArODES

Daniel Siemaszko, Alfred, C. Rufer

Proceedings of IEEE 10th International Conference on Power Electronics and Drive Systems (PEDS)

Link to the conference

Summary:

The handling of weak networks with asymmetric disturbances implies the accurate handling of the second harmonic component appearing under unbalanced networks. This paper proposes a two-step approach using classic vector control for operating the current controller from the network disturbance. First, both voltage and current must be described in the positive and negative sequence with a proper decoupling. The use of a double frame controller for forcing current balance proves to drastically reduce the second harmonic component in the DC-link voltage. As a second step, a current reference computing method is proposed for fully compensating power oscillations on the DC side that is applicable for phase voltage dips up to 50%.

Achievements

PEOPLE@HES-SO
Directory and Skills inventory

Siemaszko Daniel

Professeur HES associé

Main skills

Power Electronics

AC or DC microgrids

Modular Converters

Intermediate Energy Storage

Professeur HES associé

PEOPLE@HES-SO Directory and Skills inventory

Siemaszko Daniel

Professeur HES associé

Main skills

Power Electronics

AC or DC microgrids

Modular Converters

Intermediate Energy Storage

Professeur HES associé

PEOPLE@HES-SO
Directory and Skills inventory