Search results for: power electronic converters

• A probabilistic model of envirinmental safety of ship power plant.

  Publication

  • R. Liberacki

  - Year 2004

  Przedstawiono probabilistyczne podejście do oceny bezpieczeństwa środowiskowego siłowni statku. Wyznaczono miarę ryzyka oraz kryterium ryzyka środowiskowego siłowni statku.

• Wind Turbine Operation in Electric Power System.Advanced Modelling

  Publication

  • Z. Lubośny

  - Year 2003

  W monografii przedstawiono zagadnienia związane z pracą elektrowni wiatrowych w systemie elektroenergetycznym, a w tym przedstawiono wpływ elektrowni wiatrowych na system elektroenergetyczny (jakość energii elektrycznej). Omówiono zasady modelowania elektrowni wiatrowych różnych typów, tj. z generatorami asynchronicznymi i synchronicznymi, pracujących w systemie elektroenergetycznym. Przestawiono wybrane modele elektrowni wiatrowych...

• Computer simulator of the synchronization proces of power generating units

  Publication

  • G. Redlarski
  • A. J. Grono

  - Year 2003

  Przedstawiono istotę procesu synchronizacji w systemie elektroenergetycznym oraz podano metodykę badania synchronizatorów automatycznych. Wskazano na użyteczność komputerowego symulatora procesu synchronizacji prądnic. Opisano architekturę symulatora, jego system komputerowy oraz podsystem wizualizacji. Wyciągnięto wnioski.

• Uncertainty in measuring the power spectrum density of a random signal

  Publication

  • B. Pałczyńska
  • L. Spiralski

  - Year 2005

  Przedstawiono sposób oszacowania niepewności wyznaczania gęstości widmowej mocy przebiegu losowego. Przeprowadzono ocenę niepewności estymacji gęstości widmowej mocy biorąc pod uwagę propagację niepewności związanej z rejestracją pojedynczej próbki sygnału w algorytmie cyfrowego przetwarzania sygnału oraz błąd obciążenia estymatora wynikający z zastosowanego modelu matematycznego wielkości wyznaczanej. Wyprowadzono zależności na...

• Demagnetization of the core and reduction of power transformer inrush current

  Publication

  • J. Horiszny
  • M. Wołoszyn
  • P. Jankowski

  - Year 2005

  W artykule przedstawiono metodę ograniczenia prądów włączania transformatora energetycznego za pomocą demagnetyzacji rdzenia magnetycznego. Jako źródło energii do demagnetyzacji w proponowanej metodzie zastosowano kondensator. Do wytworzenia pola rozmagnesowującego wykorzystano uzwojenia robocze transformatora. Przeprowadzono obliczenia magnetyzmu szczątkowego rdzenia po demagnetyzacji dla różnych wartości pojemności, napięcia...

• Photovoltaic maximum power point varying with illumination and temperature

  Publication

  • E. Klugmann-Radziemska
  • E. Klugmann

  - JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME - Year 2006

  W pracy przedstawiono wyniki badań eksperymentalnych zmian położenia punktu maksymalnej mocy na charakterystyce prądowo-napięciowej modułu ogniw fotowoltaicznych, związanych ze zmieniającą się temperaturą i natężeniem padającego promieniowania. Badano czas narastania napięcia pracy i temperatury ogniw w początkowej fazie ekspozycji na promieniowanie słoneczne. Przedstawiono niektóre praktyczne aspekty zastosowania układu automatycznego...

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• Predictive control system of the shunt active power filter

  Publication

  • M. Wojciechowski
  • R. Strzelecki
  • G. Benysek

  - Year 2008

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• The Influence of LED Lighting Sources on the Nature of Power Factor

  Publication

  • M. Wlas
  • S. Galla
  • S. Galla

  - ENERGIES - Year 2018

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• New control system of the shunt active power filter

  Publication

  • R. Strzelecki
  • M. Wojciechowski

  - Year 2008

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• Analog multiplier for a low-power integrated image sensor

  Publication

  • G. Blakiewicz

  - Year 2009

  Artykuł przedstawia nowe podejście do projektowania tanich niskomocowych zintegrowanych sensorów optycznych. W odróżnieniu od wcześniej stosowanych rozwiązań opartych na masowym przetwarzaniu równoległym, zaproponowany mnożnik macierzowy charakteryzuje się korzystniejszymi cechami. Proponowane rozwiązanie, chociaż mniej elastyczne w sensie liczby możliwych do zaimplementowania algorytmów wstępnej obróbki obrazu, cechuje się znaczącą...

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• Effect of power frequency on the stress state of disc actuator

  Publication

  • P. Jankowski
  • J. Mindykowski
  • M. Wołoszyn

  - INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS - Year 2014

  This paper presents the concept of determining the optimum frequency of coil supply in inductive-dynamic drive. As a criterion to obtain the sought frequency, the smallest value of reduced stress in the disc was assumed while maintaining the desired dynamics. The disc stress is determined on the basis of solution of vibrating thin plate equation. Magnetic pressure acting on the disc is obtained from a hybrid circumferentially-field...

• Dynamic model of nuclear power plant steam turbine

  Publication

  • K. Kulkowski
  • A. Kobylarz
  • M. Grochowski
  • K. Duzinkiewicz

  - Archives of Control Sciences - Year 2015

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• <title>High power optical fiber capillaries</title>

  Publication

  • R. Romaniuk
  • R. S. Romaniuk

  - Year 2006

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• Power Converter Solutions for Industrial PV Applications—A Review

  Publication

  • I. Verbytskyi
  • M. Lukianov
  • K. Nassereddine
  • B. Pakhaliuk
  • O. Husev
  • R. Strzelecki

  - ENERGIES - Year 2022

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• Analog multiplier for a low-power integrated image sensor

  Publication

  • G. Blakiewicz

  - Elektronika : konstrukcje, technologie, zastosowania - Year 2009

  Artykuł przedstawia nowe podejście do projektowania tanich niskomocowych zintegrowanych sensorów optycznych. W odróżnieniu od wcześniej stosowanych rozwiązań opartych na masowym przetwarzaniu równoległym, zaproponowany mnożnik macierzowy charakteryzuje się korzystniejszymi cechami. Proponowane rozwiązanie, chociaż mniej elastyczne w sensie liczby możliwych do zaimplementowania algorytmów wstępnej obróbki obrazu, cechuje się znaczącą...

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• Power devices in Polish National Silicon Carbide Program

  Publication

  • A. Kubiak
  • M. Sochacki
  • Z. Lisik
  • J. K. Szmidt
  • A. Konczakowska
  • R. Barlik

  - MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY (Materials Science and Engineering B-Advanced Functional Solid-State Materials) - Year 2009

  Artykuł zawiera informacje o polskim rządowym programie ''Nowe technologie na bazie węglika krzemu i ich zastosowania w elektronice wielkich częstotliwości, dużych mocy i wysokich temperatur''. Program zawiera trzy główne zadania zawierające następujące cele: wytworzenie podłoży z SiC, wytworzenie przyrządów z SiC oraz ocenę działania wybranych przyrządów w układach aplikacyjnych. Omówiono zastosowane metody wytwarzania podłoży,...

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• The assessment of exploitation process of power for access control system

  Publication

  • M. Wiśnios
  • J. Paś

  - E3S Web of Conferences - Year 2017

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• A conceptual framework for assessing power and governance in contemporary democracy

  Publication

  • M. Bharti

  - Horyzonty Polityki - Year 2022

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• Power Converter Solutions for Industrial PV Applications—A Review

  Publication

  • K. Nassereddine
  • I. Verbytskyi
  • M. Lukianov
  • B. Pakhaliuk
  • O. Husev
  • R. Strzelecki

  - Year 2022

  Full text available to download

• Effect of power frequency on the stress state of disc actuator

  Publication

  • P. Jankowski
  • J. Mindykowski
  • M. Wołoszyn

  - INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS - Year 2014

  The paper presents the concept of determinig the optimum frequency of coil supply in inductive-dynamic drive. As a criterion to obtain the sought frequency, the smallest value of reduced stress in the disc was assumed while maintaining the desired dynamics.

• Prospects of Decreasing Power Losses in a Hydrostatic Thrust Bearing

  Publication

  • F. Wasilczuk
  • M. Wasilczuk
  • M. Wodtke

  - TRIBOLOGIA - Year 2017

  In numerous machines, axial load is carried by tilting pad thrust bearings known since the beginning of 20th century. These bearings are commonly bath lubricated, which is simple, does not require any additional pumps, and, due to this, such systems are highly reliable. In a contemporary technology, however, minimization of friction losses became an important goal of machinery improvement. Calculations based on elementary rules...

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• Selection of C-Type Filters for Reactive Power Compensation and Filtration of Higher Harmonics Injected into the Transmission System by Arc Furnaces

  Publication

  • A. G. Lange
  • G. Redlarski

  - ENERGIES - Year 2020

  This article presents a method for selecting the elements of a C-type filter working with a conventional LC-type filter for compensating reactive power and filtering out higher harmonics generated by arc furnaces and ladle furnaces. The study was conducted in a steel mill supplied by a 110 kV transmission system, where higher harmonic currents and nonlinear loads were measured. A series of computer simulations were performed under...

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• A gap waveguide-based mechanically reconfigurable phase shifter for high-power Ku-band applications

  Publication

  • A. Farahbakhsh
  • D. Zarifi
  • M. Mrozowski

  - Scientific Reports - Year 2024

  This paper presents a novel design of a low-loss, reconfgurable broadband phase shifter based on groove gap waveguide (GGW) technology. The proposed phase shifter consists of a folded GGW and three bends with a few pins forming the GGW and one bend attached to a movable plate. This movable plate allows for adjustments to the folded waveguide length, consequently altering the phase of electromagnetic waves. The advantage of GGW...

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• Operational problems of large power diesel engines combusting biofuels, considered togetherwith assessment of their operation

  Publication

  • J. Girtler
  • Z. Korczewski
  • J. Mańczak

  - Polish Maritime Research - Year 2010

  Within this article the issue of large power self ignition engines fed with biofuels has been undertaken. The analysis focused mainly on operation problems. There has been noticed some advantages and difficulties associated with the biofuel application to self ignition engines. The research problem has been characterised and the research purposes have been proposed enabling the most profitable formation of energetic features of...

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• Stability Analysis of Shunt Active Power Filter with Predictive Closed-Loop Control of Supply Current

  Publication

  • A. Bielecka
  • D. Wojciechowski

  - ENERGIES - Year 2021

  This paper presents a shunt active power filter connected to the grid via an LCL coupling circuit with implemented closed‐loop control. The proposed control system allows selective harmonic currents compensation up to the 50th harmonic with the utilization of a model‐based predictive current controller. As the system is fully predictive, it provides high effectiveness of the harmonic reduction, which is proved by waveforms achieved...

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• Paweł Możejko dr hab.

  People

  Division of Electron Collisions Physics, Faculty of Applied Physics and Mathematics, Institute of Physics and Applied Computer Science

• DEPO: A dynamic energy‐performance optimizer tool for automatic power capping for energy efficient high‐performance computing

  Publication

  • A. Krzywaniak
  • P. Czarnul
  • J. Proficz

  - SOFTWARE-PRACTICE & EXPERIENCE - Year 2022

  In the article we propose an automatic power capping software tool DEPO that allows one to perform runtime optimization of performance and energy related metrics. For an assumed application model with an initialization phase followed by a running phase with uniform compute and memory intensity, the tool performs automatic tuning engaging one of the two exploration algorithms—linear search (LS) and golden section search (GSS), finds...

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• Analiza i wizualizacja danych z wykorzystaniem narzędzia Power BI edycja dla młodzieży

  e-Learning Courses

  • A. M. Trzaskowska

• Practical Approach to Large-Scale Electronic Structure Calculations in Electrolyte Solutions via Continuum-Embedded Linear-Scaling Density Functional Theory

  Publication

  • J. Dziedzic
  • A. Bhandari
  • L. Anton
  • C. Peng
  • J. Womack
  • M. Famili
  • D. Kramer
  • C. Skylaris

  - Journal of Physical Chemistry C - Year 2020

  We present the implementation of a hybrid continuum-atomistic model for including the effects of a surrounding electrolyte in large-scale density functional theory (DFT) calculations within the Order-N Electronic Total Energy Package (ONETEP) linear-scaling DFT code, which allows the simulation of large complex systems such as electrochemical interfaces. The model represents the electrolyte ions as a scalar field and the solvent...

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• The power of personal brand authenticity and identification: top celebrity players’ contribution to loyalty toward football

  Publication

  • W. Kucharska
  • I. Confente
  • F. Brunetti

  - Journal of Product & Brand Management - Year 2020

  Purpose: In the current era of fake news, illusions, manipulations, and other artificial attributes of virtuality and reality, authenticity is a virtue that people highly appreciate. This study examines the influence of the personal brand authenticity of top football players on loyalty to the football discipline in general, via the mediation of personal brand identification. Design: Based on data collected from a convenience sample...

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• ANALYSIS OF THE IMPACT OF THE PLANNED SEWAGE DISCHARGE FROM THE ‘NORTH’ POWER PLANT ON THE VISTULA WATER QUALITY

  Publication

  • P. Zima
  • P. Wielgat

  - Year 2016

  The paper presents results of analysis of the industrial sewage discharge impact from the ‘North’ Power Plant on the Vistula water quality around 45+330 of the river kilometer. For the analysis, the two-dimensional models of flow, impurities and temperature transport were used. Hydrological conditions of the analyzed section of the river, characteristic flows and bathymetry of the riverbed in the first instance were defined....

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• Physical properties of homogeneous TiO2 films prepared by high power impulse magnetron sputtering as a function of crystallographic phase and nanostructure

  Publication

  • V. STRAňáK
  • M. Čada
  • M. Quaas
  • S. Block
  • R. Bogdanowicz
  • Š. Kment
  • H. Wulff
  • R. Hippler
  • Z. HUBIčKA
  • M. TICHý

  - JOURNAL OF PHYSICS D-APPLIED PHYSICS - Year 2009

  Optical, photo-electrochemical, crystallographic and morphological properties of TiO2 thin films prepared by high power impulse magnetron sputtering at low substrate temperatures (&lt;65 ◦C) without post-deposition thermal annealing are studied. The film composition-anatase, rutile or amorphous TiO2-is adjusted by the pressure (p ∼ 0.75-15 Pa) in the deposition chamber. The different crystallographic phases were determined with grazing...

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• Energy and exergy analysis of negative CO2 emission gas power plant operation using thermodynamic modelling results of the cycle

  Publication

  • P. Madejski
  • I. S. Ertesvåg
  • P. Ziółkowski
  • D. Mikielewicz

  - Year 2021

  A developed cycle of negative CO2 emission gas power plant is presented. The cycle is an oxy-combustion gas turbine cycle where the gas fuel is burnt with pure oxygen, and liquid water is injected to the combustor to keep the temperature at an appropriate level for the gas turbine. The negative level of CO2 emission can be obtained by combining CO2 capture method with the usage of a gas fuel based on sewage sludge gasification....

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• High gain/bandwidth off‑chip antenna loaded with metamaterial unit‑cell impedance matching circuit for sub‑terahertz near‑field electronic systems

  Publication

  • M. Alibakhshikenari
  • B. S. Virdee
  • D. Mariyanayagam
  • V. Vadala
  • M. Naser-moghadasi
  • C. H. See
  • I. Dayoub
  • S. Aissa
  • P. Livreri
  • S. N. Burokur... and 4 others

  - Scientific Reports - Year 2022

  An innovative off-chip antenna (OCA) is presented that exhibits high gain and efficiency performance at the terahertz (THz) band and has a wide operational bandwidth. The proposed OCA is implemented on stacked silicon layers and consists of an open circuit meandering line. It is shown that by loading the antenna with an array of subwavelength circular dielectric slots and terminating it with a metamaterial unit cell, its impedance...

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• Voltage fluctuations on the main switchgear of the industrial power system supplying the rolling mill motors_part_2

  Open Research Data

  open access

  • B. Pałczyńska
  • T. Tarasiuk

  - series: The flicker measurement in the industrial power system supplying the rolling mill motors

  The dataset presents the voltage waveforms on the bus bars of the main switchgear of the industrial power network for the supply of rolling mills. The data was recorded during an experiment whose purpose was to determine a level of short-term and long-term flicker caused by voltage fluctuations. In the virtual application of flickermeter, a hardware...

• Improving the Performance of a Graphite Foil/Polyaniline Electrode Material by a Thin PEDOT:PSS Layer for Application in Flexible, High Power Supercapacitors

  Publication

  • Z. Zarach
  • K. Trzciński
  • M. S. Łapiński
  • A. Lisowska-Oleksiak
  • M. Szkoda

  - Materials - Year 2020

  In this study, we present a novel strategy for enhancing polyaniline stability and thus obtaining an electrode material with practical application in supercapacitors. A promising (graphite foil/polyaniline/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) GF/PANI/PEDOT:PSS) electrode material was characterized and used in the construction of a symmetric supercapacitor that provides an outstanding high power density. For this...

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• Event-Triggered Communication in Cooperative, Adaptive Model Predictive Control of a Nuclear Power Plant’s Turbo–Generator Set

  Publication

  • P. Sokolski
  • T. A. Rutkowski
  • B. Ceran
  • D. Złotecka
  • D. Horla

  - ENERGIES - Year 2023

  This paper discusses the issue of optimizing the communication between the components of a cooperating control system formed by a pair of MPC controllers of a nuclear power plant turbine set using online recursive least squares identification. It is proposed to use event-triggered communication, i.e., sending information only at selected time instants, as opposed to the standard approach where communication is triggered by time...

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• The short-term flicker severity level measured in the industrial power system supplying the rolling mill motors

  Open Research Data

  open access

  • B. Pałczyńska

  - series: The flicker measurement in the industrial power system supplying the rolling mill motors

  The dataset presents a short-term flicker severity level measured on the bus bars of the main switchgear of the industrial power network for the supply of rolling mills. The data were obtained during an experiment whose purpose was to determine a level of short-term and long-term flicker caused by voltage fluctuations. In the virtual application of...

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