Ryszard Strzelecki - Publications - Bridge of Knowledge

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Profile photo: prof. dr hab. inż. Ryszard Strzelecki

prof. dr hab. inż. Ryszard Strzelecki

Employment

  • Professor at Department of Power Electronics and Electrical Machines
  • 2017-10-01 - present at Full Professor - Department of Power Electronics and Electrical Machines Faculty of Electrical and Control Enginering Gdańsk University of Technology
  • 2008-09-01 - present at Professor - Scinces Consultant/Head of the Baltic Laboratory of Power Electronics Technologies in Gdynia Department of High Power Converters Electrotechnical Institute

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total: 142

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Year 2017
  • Multilevel Converters
    Publication

    - Bulletin of the Polish Academy of Sciences-Technical Sciences - Year 2017

    The newest Special Section is intended to focus on recent research and trends in application of multilevel converters. Multilevel converters have been extensively developed over the last two decades and show several important advantages of power electronic circuits, such as: operation at high voltages, harmonics reduction, higher efficiency, modularity, smaller size and lower cost. Also, thanks to increasing interest in renewable...

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  • Neutral point balancing technique for 3-level neutral point clamped converter with servo system
    Publication

    - Year 2017

    Neutral point voltage drift compensation technique in 3-level NPC multilevel converter and servo system is described in the paper. Analytical expressions are obtained for power subsystem elements parameters of servo drive system. Simulation of servo system, based on PMSM motor with 3-level NPC converter is considered.

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  • Novel single-stage buck-boost inverter with unfolding circuit
    Publication

    - Year 2017

    A novel solution of a single-stage buck-boost inverter with unfolding circuit at the output stage is presented. The inverter has a wide range of input voltage regulation, minimum passive components and a very flexible control structure. It can be applied for renewable energy systems where high power density is required. Our simulation results confirmed all theoretical statements

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  • SiC-based T-type modules for multi-pulse inverter with coupled inductors
    Publication

    - Year 2017

    The paper presents SiC-based three-level T-type modules designed for a high-performance 30kVA DC/AC inverter operating at high frequency 85 kHz with low THD of the output voltage. This inverter system consists of two integrated parts. The first part is active and contains three parallelconnected three-phase T-type modules built with fast-switching SiC power transistors. The second, passive part of the system is a set of inductors...

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  • Space vector modulation in multilevel inverters of the servo drives of the trajectory measurements telescopes
    Publication

    - Izvestiya vysshikh uchebnykh zavedeniy. Priborostroenie - Year 2017

    Using the MatLab/Simulink mathematical model of a three-phase three-level voltage inverter, the influence of the space-vector modulation (SVM) algorithm on the pulsations of the current (torque) of an AC motor in the range of low rotation speeds is considered. It is shown that the SVM of the second kind does not provide a pulsations level comparable to the pulsations of a sinusoidal pulse-width modulation (SPWM), both in the static...

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Year 2016
  • A novel approach to energy safety improvement in the marine power plants with active power surge compensator
    Publication

    - Year 2016

    Paper raises a point of power surges and theirs adverse effects in the marine power plants. The article explains a source of surges appearance, and presents measurements carried out on a modern ship. It discusses effects of dynamic power transients on the ship’s energy safety. Finally it proposes, a novel approach for power surge elimination, based on medium voltage active conditioner. As well as it propose the topology and control...

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  • Comparison of Impedance-Source Networks for Two and Multilevel Buck–Boost Inverter Applications
    Publication
    • O. Husev
    • F. Blaabjerg
    • C. Roncero-Clemente
    • E. Romero-Cadaval
    • D. Vinnikov
    • Y. Siwakoti
    • R. Strzelecki

    - IEEE TRANSACTIONS ON POWER ELECTRONICS - Year 2016

    mpedance-source networks are an increasingly popular solution in power converter applications, especially in single-stage buck-boost power conversion to avoid additional front-end dc-dc power converters. In the survey papers published, no analytical comparisons of different topologies have been described, which makes it difficult to choose the best option. Thus, the aim of this paper is to present a comprehensive analytical comparison...

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  • Coupled inductors based filter for matrix converters
    Publication

    - Year 2016

    The use of the coupled inductors in the multipulse matrix converter (MC) systems is described in the paper. The possible arrangements of the system are given together with the description of their operation parameters. Moreover, the influence of the system’s topology on the output power quality is also presented. The invented converter structures evaluation results are given in the form of simulation tests acquired output waveforms...

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  • Deep slot effect in the squirrel-cage induction motors with scalar (V/F) control
    Publication

    - Year 2016

    Qualitative characteristics of the electrical drive considerably depend on identification accuracy of math model parameters. In particular, it is depend on detection accuracy of stator active resistance r1 that is used in calculation of flux linkages, rotary speed in sensorless control systems. Paper provides analysis of influence of stator deep slot effect to stator active resistance value

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  • Errors in the analysis of series resonant inverter/converter assuming sinusoidal waveforms of voltage and current
    Publication

    - Year 2016

    In this paper the theory and simulation results of the series resonant inverter / converter are presented. In this work the authors carried out a detailed comparative analysis of results obtained using the method of AC analysis in the steady state for the first harmonic with the results of computer simulation. The AC analysis under certain conditions can lead to errors disqualifying this method. In particular, these errors appear...

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  • Four level inverter's DC bus voltage balancing with 3-terminal DAB converter
    Publication

    - Year 2016

    —Multilevel inverters become more and more popular, especially in the medium or high voltage and high power applications. Unfortunately, some of inverter topologies require additional DC bus voltage balancing systems. This paper presents a novel approach to such systems, which is based on a multiple terminal DAB converter. Along with the voltage balancing function the proposed solution enables the connection of energy storage devices...

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  • Low harmonic multipulse voltage converters using coupled reactors
    Publication

    - Year 2016

    This paper presents a novel approach to the multi pulse voltage converters (VC), especially voltage source inverters (VSI) and matrix converters (MC) based on several typical identical modules connected in parallel using coupled reactors. Such arrangements resulting in lower voltage distortions at extremely low switching frequency. The proposed arrangement was validated by simulation. Laboratory models of 18- and 24pulse 3-level...

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  • Modular high precision high current source for special applications — Simulation and verification
    Publication

    - Year 2016

    This paper presents selected issues concerning realization of high precision high current source for special applications, where high demands of output parameters of such device are required. A new 80 kW prototype of modular high precision high current source is presented, where output current accuracy reaches 5x10-5. This paper presents also results of operation of the simulation model and of the prototype converter. In order...

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  • Modular multipulse voltage source inverters with integrating coupled reactors
    Publication

    - Year 2016

    A novel approach to the voltage source inverters (VSI) construction is presented in the paper. The invented inverter structures allow to operate several DC/AC converters in parallel resulting in lower voltage distortions at extremely low switching frequency. The research presented in the paper describes such a parallel operation of the VSI’s which is possible thanks to the use of coupled inductors. The eighteen-pulse and twenty-four-pulse...

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  • Multipulse inverter structures with low voltage distortion
    Publication

    - Year 2016

    A novel approach to the voltage source inverters (VSI) construction is presented in the paper. The invented inverter structures allow to operate several DC/AC converters in parallel resulting in lower voltage distortions at extremely low switching frequency. The research presented in the paper describes such a parallel operation of the VSI’s which is possible thanks to the use of coupled inductors. The eighteen-pulse three-level...

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  • Multi-pulse VSC arrangements with coupled reactors
    Publication

    - Year 2016

    This paper presents a novel approach to the multipulse VSC (Voltage Source Converter) arrangements based on several conventional inverter modules connected in parallel by using coupled reactors. This solution reduces the THD of the output voltage, despite the low switching frequency of transistors. The advantage of the proposed solution is also a relatively small rated power of the reactors. Proposed new arrangements for different...

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  • Novel Family of Single-Phase Modified Impedance-Source Buck-Boost Multilevel Inverters With Reduced Switch Count
    Publication

    - IEEE TRANSACTIONS ON POWER ELECTRONICS - Year 2016

    his paper describes novel single-phase solutions with increased inverter voltage levels derived by means of a nonstandard inverter configuration and impedance source networks. Operation principles based on special modulation techniques are presented. Detailed component design guidelines along with simulation and experimental verification are also provided. Possible application fields are discussed, as well as advantages and disadvantages....

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  • Size and mass minimization of capacitor bank in a power converter DC line of DC drive with closed loop control system with PWM and current limitation
    Publication

    - Year 2016

    Paper deals with evaluation equations for power filter of AC-DC power converter which allows to provide size and mass minimization of capacitor bank in DC drive closed loop systems with PWM and current limitation. Reliability of provided equations is proved by simulation in MATLAB/Simulink

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