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Search results for: POWER TRANSFORMERS, POWER DISTRIBUTION, SMART GRID, POWER ELECTRONICS, HYBRID POWER TRANSFORMER
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The impackt of polish pumped-storage plants on operation of the national power system on working days and holidays
PublicationPrzedstawiono wpływ polskich elektrowni szczytowo-pompowych na pracę krajowego systemu elektroenergetycznego w cyklu dobowym na przykładzie dni charakterystycznych roboczych i dni wolnych od pracy. Analizę przeprowadzono w oparciu o obliczenia wykonane w dwóch wariantach: system pracuje z istniejącymi elektrowniami pompowymi i system pracuje bez elektrowni pompowych.
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50’ Sail Catamaran with Hybrid Propulsion, Design, Theoretical and Experimental Studies
PublicationThe development of modern lithium batteries and propulsion systems now allows the use of complex propulsion systems for vessels of various sizes. As part of the research and implementation project, a parallel hybrid drive system was designed, built and then tested in the laboratory. The experimental studies conducted allowed for the measurements of power, fuel consumption and electric power distribution in various operating modes...
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Theoretical designing of selenium heterocyclic non-fullerene acceptors with enhanced power conversion efficiency for organic solar cells: a DFT/TD-DFT-based prediction and understanding
PublicationIn this study, we have designed and explored a new series of non-fullerene acceptors for possible applications in organic solar cells. We have designed four molecules named as APH1 to APH4 after end-capped modification of recently synthesized Y6-Se-4Cl molecule. Density functional theory and time dependent-density functional theory have been employed for computing geometric and photovoltaic parameters of the designed molecules....
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IET Smart Grid
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Reneng Dongli Gongcheng/Journal of Engineering for Thermal Energy and Power
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Dongli Gongcheng Xuebao/Journal of Chinese Society of Power Engineering
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Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams
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Hysteresis modelling of a medium frequency single-phase transformer
PublicationThe article describes a feedback Preisach hysteresis model equivalent circuit implementation of a medium frequency single-phase transformer being a part of a high power and high efficiency DC-DC converter. The macroscopic models of magnetic hysteresis are introduced and the feedback Preisach model is selected for further analysis. The hysteresis model is developed for a prototype transformer and the hysteresis loops are compared...
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Comprehensive distortion compensation of grid-connected inverter currents
PublicationThe paper presents a comprehensive approach to the compensation of phase current distortion of grid-connected power inverters. Four different sources of current distortion are addressed: imperfect grid synchronization caused by the distortion in the grid voltages, voltage fluctuations in the dc link, time delays in the estimation of grid voltages, and the distortion of inverter output voltages due to dead-time effects and related...
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Evaluative analysis of 2- and 3-level DC/DC converters for high-voltage high-power applications
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Power Surge Compensator based on a Four Level Diode Clamped Inverter for ship application. Average model
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The acute effects of caffeine intake on time under tension and power generated during the bench press movement
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Short-Term Blood Flow Restriction Increases Power Output and Bar Velocity During the Bench Press
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Changes of Power Output and Velocity During Successive Sets of the Bench Press With Different Duration of Eccentric Movement
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Effect of Electron Beam Power Density on the Structure of Titanium Under Non-Vacuum Electron-Beam Treatment
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Corrigendum: Contrast Tempo of Movement and Its Effect on Power Output and Bar Velocity During Resistance Exercise
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Effect of Microwave Radiation Power on the Size of Aggregates of ZnO NPs Prepared Using Microwave Solvothermal Synthesis
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MARKAL LONG-TERM POWER GENERATION SCENARIOS FOR POLAND: INCREASING THE SHARE OF RENEWABLE ENERGY SOURCES BY 2040
PublicationIn this paper, renewable energy sources (RES) support mechanisms in Poland was presented with perspectives of proposed support system modifications, discussed in the project of Renewable Energy Act. In addition, MARKAL model of RES support mechanism was presented, taking into account technology-specific multiplication factors. Two model runs with emission trading system in place and two additional runs without emission trade were...
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Analysis of the selection of low temperature medium for a turbine power plant using ocean thermal energy (OTEC)
PublicationThe paper presents the results and conclusions of numerical calculations modelled in the EES program of a closed OTEC cycle. The following mediums were analysed: ammonia, R32, R41, R404a, R407c, R410a, R423a, R500, R502, R507a and R114, R152a, R234fa, R600, R1234yf, R1234ze. Analogous assumptions were adopted as in the ORC cycle with heat regeneration for dry refrigerants without regeneration for wet refrigerants. Each of them...
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Design analysis of turbines for co-generating micro-power plant working in accordance with organic Rankine's cycle
PublicationPrzedstawiono wyniki analizy projektowej turbin dla mikrosiłowni kogeneracyjnej pracującej według organicznego obiegu Rankine'a z wykorzystaniem biopaliwa. Rozważono zakres mocy cieplnej od 25kW do 100kW, któremu odpowiadała możliwa do uzyskania moc elektryczna od 2kW do 12kW. Przeanalizowano projekty turbin osiowych (jedno- i wielostopniowych, także z częściowym zasilaniem), turbin promieniowych i promieniowo-osiowych. Porównano...
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Detremination of the cutting power of the sawing process using both preliminary sawing data and modern fracture mechanics
PublicationPrzedstawiono medodykę prognozowania mocy skrawania dla procesu piłowania drewna cienkimi piłami. Przewidywanie zapotrzebowania mocy skrawania oparte jest na współczesnej mechanice pękania, a do wyznaczenia stałych materiałowych: wiązkości materiału oraz niszczących napężeń ścinających wykorzystano wyniki wstępnych badań eksperymentalnych. Błędy prognozowania nie przekraczają 15.5% dla przypadku cienkich pił gdy rolę znacząca odgrywają...
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MARKAL long-term power generation scenarios for Poland: Increasing the share of renewable energy sources by 2040
PublicationIn this paper, renewable energy sources (RES) support mechanisms in Poland was presented with perspec-tives of proposed support system modifications, discussed in the project of Renewable Energy Act. In ad-dition, MARKAL model of RES support mechanism was presented, taking into account technology-specific multiplication factors. Two model runs with emission trading system in place and two additional runs without emission trade...
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Issues Related to Power Supply Reliability in Integrated Electronic Security Systems Operated in Buildings and Vast Areas
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The Reliability and Exploitation Analysis Method of the ICT System Power Supply with the Use of Modelling Based on Rough Sets
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The Maximum Power Point Tracking (MPPT) of a Partially Shaded PV Array for Optimization Using the Antlion Algorithm
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Enabling a Stable High-Power Lithium-Bromine Flow Battery Using Task-Specific Ionic Liquids
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Fatigue Damage Development in 14MoV6-3 Steel for Power Plant Pipes Monitored by Digital Image Correlation
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Effect of high temperature exposure on the fatigue damage development of X10CrMoVNb9-1 steel for power plant pipes
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Analysis of the selection of low-temperature medium for a turbine power plant using ocean thermal energy (OTEC)
PublicationThe paper presents the results and conclusions of numerical calculations modelled in the EES program of a closed OTEC cycle. The following mediums were analysed: ammonia, R32, R41, R404a, R407c, R410a, R423a, R500, R502, R507a and R114, R152a, R234fa, R600, R1234yf, R1234ze. Analogous assumptions were adopted as in the ORC cycle with heat regeneration for dry refrigerants without regeneration for wet refrigerants. Each of them...
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Predicting the Purchase of Electricity Prices for Renewable Energy Sources Based on Polish Power Grids Data Using Deep Learning Models for Controlling Small Hybrid PV Microinstallations
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Optimisation of cooperation of hybrid renewable energy sources with hydrogen energy storage toward the lowest net present cost
PublicationThe paper presents the results of a technical and economic analysis of the power supply for a model industrial facility based on intermittent renewable energy sources in the form of wind turbines and photovoltaic modules, supplemented with hydrogen energy storage. The adopted power supply strategy assumed the maximisation of self-consumption of self-produced electricity. Six variants were considered, including two with an energy...
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Multi-Transformer Flyback Converter for Supplying Isolated IGBT and MOSFET Drivers
PublicationA multi transformer flyback converter topology for supplying transistor drivers is presented. The topology presents some advantages over typical multi output single transformer, as reduction of effective leakage inductance, equal magnetic coupling between primary and secondary circuits and better isolation between outputs. Simulation study carried out in the LTSpice IV program and preliminary experimental results indicate high...
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Szkolenie w ramach POWER 3.4
EventsMetodologia prowadzenia badań
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Szkolenie w ramach POWER 3.4
EventsWykorzystanie zasobów Open Access w pracy dydaktycznej (Cz.I)
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Szkolenie w ramach POWER 3.4
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Szkolenie w ramach POWER 3.4
EventsSztuka autoprezentacji dla dydaktyków i prelegentów.
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Szkolenie w ramach POWER 3.4
EventsWyszukiwanie, przetwarzanie i analiza informacji naukowej w specjalistycznych bazach danych i ich wykorzystanie w procesie dydaktycznym (cz.II)
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Szkolenie w ramach POWER 3.4
EventsWykorzystanie zasobów Open Access w pracy dydaktycznej (Cz.I)
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Szkolenie w ramach POWER 3.4
EventsSztuka autoprezentacji dla dydaktyków i prelegentów
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Szkolenie w ramach POWER 3.4
EventsWyszukiwanie, przetwarzanie i analiza informacji naukowej w specjalistycznych bazach danych i ich wykorzystanie w procesie dydaktycznym (cz.I)
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Szkolenie w ramach POWER 3.4
EventsMetodologia prowadzenia badań
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Szkolenie w ramach POWER 3.4
EventsSztuka autoprezentacji dla dydaktyków i prelegentów
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Szkolenie w ramach POWER 3.4
EventsMetodologia prowadzenia badań
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Szkolenie w ramach POWER 3.4
EventsMetodologia prowadzenia badań
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Szkolenie w ramach POWER 3.4
EventsSztuka autoprezentacji dla dydaktyków i prelegentów
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Szkolenie w ramach POWER 3.4
EventsMetodologia prowadzenia badań
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Szkolenie w ramach POWER 3.4
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Szkolenie w ramach POWER 3.4
EventsSzkolenie w ramach POWER 3.4: Wykorzystanie menadżera bibliografii Mendeley w pracy dydaktycznej
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Szkolenie w ramach POWER 3.4
EventsSztuka autoprezentacji dla dydaktyków i prelegentów.
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Szkolenie w ramach POWER 3.4
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