Wyniki wyszukiwania dla: UPS , SHORT-CIRCUIT , FAULT LOOP IMPEDANCE MEASUREMENT , POWER QUALITY , ELECTRICAL SAFETY

• Transient States during Short-circuit in a Line Powered by UPS and its Impact on Earth Fault Loop Impedance Measurement and Power Quality

  Publikacja

  • J. Katarzyński
  • M. Olesz

  - Rok 2020

  The short-circuit in a line powered by Uninterruptible Power Supply (UPS) during different UPS operation modes is presented in the article. The transient state condition related to the short-circuit in a line fed from double conversion On-line UPS is discussed in detail. The results of the measurements of earth fault loop impedance (FLI) in circuits powered by UPS with the instruments of various manufacturers are presented. The...

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• Fault Loop Impedance Measurement in Circuits Fed by UPS and Principle of Safety Protection

  Publikacja

  • J. Katarzyński
  • M. Olesz

  - Sustainability - Rok 2020

  This paper indicates a significant problem of uncertainty of fault loop impedance (FLI) measurement in circuits powered from uninterruptible power supply (UPS) (double-conversion AC-DC-AC). The correctly determined value of this impedance, related to the short-circuit current disconnection time and to the reference value, is one of the most important elements that determines the approval of an electrical installation and its receivers...

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• STANY NIEUSTALONE TOWARZYSZĄCE POMIAROWI IMPEDANCJI PĘTLI ZWARCIA W OBWODACH WYJŚCIOWYCH ZASILACZY BEZPRZERWOWYCH UPS

  Publikacja

  • M. Olesz
  • J. Katarzyński

  - Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej - Rok 2018

  W pracy przedstawiono metodykę i wyniki pomiarów stanów nieustalonych w zasilaczu bezprzerwowym (UPS) typu on - line. Do rejestracji zdarzeń po stronie zasilania i na wyjściu UPS wykorzystano dwa przyrządy do pomiaru jakości energii elektrycznej zsynchronizowane czasowo. Rejestratory kompresują uzyskane dane pomiarowe, co może wprowadzać dodatkowe błędy pomiaru wielkości mierzonych – napięć i prądów. Dodatkowe rejestracje oscyloskopem...

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• Selected problems of earth fault loop impedance testing in circuits fed from UPS

  Publikacja

  • S. Czapp

  - Automatyka Elektryka Zakłócenia - Rok 2017

  In the paper a principle of earth fault loop impedance testing in low voltage systems has been presented. Selected factors, influencing accuracy of the testing, are indicated. A structure of UPS of VFI-type and the problem of impedance testing in circuits with such type of UPS are discussed.

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• Method of earth fault loop impedance measurement without nuisance tripping of RCDs in 3-phase low-voltage circuits

  Publikacja

  • S. Czapp

  - Metrology and Measurement Systems - Rok 2019

  Verification of electrical safety in low-voltage power systems includes the measurement of earth fault loop impedance. This measurement is performed to verify the effectiveness of protection against indirect contact. The widespread classic methods and meters use a relatively high value of the measuring current (5–20) A, so that they are a source of nuisance tripping of residual current devices (RCDs). The meters dedicated to circuits...

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• Effect of the let-through energy of overcurrent protective devices on the temperature of conductors during short-circuits

  Publikacja

  • S. Czapp
  • D. Kowalak

  - Przegląd Elektrotechniczny - Rok 2021

  The scope of the verification of low-voltage systems covers the earth fault loop impedance measurement. This measurement is usually performed with the use of low-value current meters, which force a current many times lower than the one occurring during a real short-circuit. Therefore, the international standard recommends consideration of the increase of resistance of conductors with the increase of temperature, which may occur...

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• The voltage on bus bars of the main switchboard of the ro-ro ship electrical power system during maneuvering

  Dane Badawcze

  open access

  • B. Pałczyńska
  • T. Tarasiuk

  The dataset is part of the research results on the quality of supply voltage on bus bars of the main switchboard of the ship's electrical power system in different states of ship exploitation. The attached dataset contains the measurement results carried out onboard a ro-ro ship during maneuvering.

• The voltage on bus bars of the main switchboard of the ro-ro ship electrical power system during a sea voyage

  Dane Badawcze

  open access

  • B. Pałczyńska
  • T. Tarasiuk

  The dataset is part of the research results on the quality of supply voltage on bus bars of the main switchboard of the ship's electrical power system in different states of ship exploitation. The attached dataset contains the measurement results carried out onboard a ro-ro ship during a sea voyage.

• Broken rotor bar impact on sensorless control of induction machine

  Publikacja

  • P. Kołodziejek
  • E. Bogalecka

  - COMPEL-THE INTERNATIONAL JOURNAL FOR COMPUTATION AND MATHEMATICS IN ELECTRICAL AND ELECTRONIC ENGINEERING - Rok 2009

  The aim of the research is analysis of the sensorless control system of induction machine with broken rotor for diagnostic purposes. Increasing popularity of sensorless controlled variable speed drives requires research in area of reliability, range of stable operation, fault symptoms and application of diagnosis methods. T transformation (Cunha et al.,2003) used for conversion of instantaneous rotor currents electrical circuit...

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• Evaluation of applicability of classic methods of a fault loop impedance measurement to circuits with residual current devices

  Publikacja

  • S. Czapp
  • K. Borowski

  - Acta Energetica - Rok 2016

  Measurement of fault loop impedance in low voltage grids and systems is in most cases performed to verify the effectiveness of protection against electric shock by automatic disconnection of supply. For the sake of measurement accuracy, it is advisable to perform it using large current. Unfortunately, in circuits with residual current devices which are very widely used nowadays, a large measurement current may trigger those devices...

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• Trends in Locally Balanced Energy Systems without the Use of Fossil Fuels: A Review

  Publikacja

  • Ł. Mazur
  • S. Cieślik
  • S. Czapp

  - ENERGIES - Rok 2023

  In recent years, the idea of the operation of energy systems (power systems, heating systems) has changed significantly. This paper is an overview of locally balanced energy systems without the use of fossil fuels. The paper justifies the concept of local energy balancing in a new energy system that does not use fossil fuels (coal, natural gas, and crude oil), based on European Union guidelines and formal documents as well as the...

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• A method of earth fault loop impedance measurement without unwanted tripping of RCDs

  Publikacja

  • R. Roskosz
  • E. Musiał
  • S. Czapp

  - Rok 2018

  In low-voltage networks, earth fault loop impedance (EFLI) measurement is the basis for assessing the effectiveness of automatic disconnection of supply. Such a measurement is performed during initial and periodical verification, especially in a TN low-voltage network. Nowadays, due to widespread application of residual current devices (RCDs), such test is difficult in many circuits because RCDs operate during the test. In this...

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• Modelling and analysis of a synchronous generator in more electric aircraft power system using Synopsys/Saber simulator = Modelowanie i analiza generatora synchronicznego w systemie elektroenergetycznym nowoczesnego samolotu. Zastosowanie symulatora Synopsys/Saber

  Publikacja

  • M. Michna
  • F. Kutt
  • P. Chrzan
  • M. Ronkowski

  - Prace Instytutu Elektrotechniki - Rok 2009

  Streszczenie angielskie: A model for studying synchronous machine (SM) dynamic behaviour in more electric aircraft (MEA) power system is developed and implemented in the Synopys/Saber simulation environment. The modelling language MAST has been used to elaborate the SM model. The elaborated model exhibit a network with the same number of external terminals/ports as the real SM, and represents its behaviour in terms of the electrical...

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• The loop impedance measurement

  Dane Badawcze

  open access

  • A. Golijanek-Jędrzejczyk

  The loop impedance measurement

• Uncertainty estimation of loop impedance measurement determined by the vector method

  Publikacja

  • A. Golijanek-Jędrzejczyk

  - Measurement Automation Monitoring - Rok 2012

  This article presents a detailed analysis of uncertainty estimation of loop impedance measurement determined by the vector method. The analysis includes the following estimates: resistance variance, voltage variance and time measurement variance. This paper presents a methodology for estimating the combined standard uncertainty of loop impedance by the vector method. The vector method allows to determine loop impedance based on...

• A new method of fault loop resistance measurement in low voltage systems with residual current devices

  Publikacja

  • S. Czapp
  • K. Borowski
  • J. Klucznik
  • Z. Lubośny
  • K. Dobrzyński

  - Rok 2015

  This paper presents a new method of fault loop resistance measurement in low voltage systems with residual current devices. The method enables measuring fault loop resistance without nuisance tripping of residual current devices, by application an unconventional waveform of measurement current. It is important for proper verification of the effectiveness of protection against electric shock.

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• Magnetic Field Generated by Short Circuit Current in the 110 kV Power System

  Publikacja

  • T. Lisewski
  • J. Łuszcz

  - Rok 2014

  Electric fields within tissues induced by magnetic fields including transients or short-term peaks should not be time averaged and be regarded as instantaneous values as established in the ICNIRP (International Commission on Non - Ionizing Radiation Protection) guidelines. Measurements of power lines magnetic fields with regard to human beings exposure are carried out typically with maximum current load at current balance condition...

• Measurements of no-load and short-circuit parameters of power transformers with taps

  Dane Badawcze

  open access

  • A. Augusiak
  • Z. Myśliwiec
  • F. Panczocha
  • G. Nosinski
  • K. Pela
  • K. Plichta
  • K. Reclaw

  1)    The Laboratory LINTE^2 is a large research infrastructure operated by the Faculty of Electrical and Control Engineering at Gdańsk University of Technology, to be found in Gdańsk, Poland (54.3690 N, 18.6130 E).

• Measurement of the earth fault loop impedance in a low voltage network with operating loads

  Publikacja

  • S. Czapp

  - Rok 2009

  W artykule przedstawiono problematykę dokładności pomiaru impedancji pętli zwarciowej w sieciach z obciążeniami roboczymi. Klasyczne metody pomiarowe i mierniki mogą powodować błędy pomiaru przekraczające dopuszczalną wartość. Z tego powodu może wystąpić ryzyko porażenia prądem elektrycznym, ponieważ przy doziemieniu nie będzie spełniony warunek samoczynnego wyłączenia zasilania. Błędy pomiaru w sieci z obciążeniami roboczymi można...

• Fault loop impedance measurement in low voltage network with residual current devices

  Publikacja

  • S. Czapp

  - Elektronika Ir Elektrotechnika - Rok 2012

  W sieciach i instalacjach niskiego napięcia z wyłącznikami różnicowoprądowymi pomiar impedancji pętli zwarciowej jest kłopotliwy. Prąd pomiarowy powoduje ich zbędne zadziałanie, co uniemożliwia prawidłowe wykonanie pomiaru. W artykule omówiono przyczyny zbędnego zadziałania wyłączników różnicowoprądowych podczas pomiaru impedancji pętli zwarciowej oraz warunki, w jakich ten pomiar można wykonać poprawnie.

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• Influence of the method of the control of the hybrid contactless short-circuit limiter on power quality

  Publikacja

  • P. Leśniewski

  - Measurement Automation Monitoring - Rok 2007

  W artykule przedstawiono wpływ sterowania bezstykowego ogranicznika prądów zwarciowych na ograniczanie zapadów napięcia. Scharakteryzowano podstawowe własności ogranicznika oraz układu sterowania jego pracą. Ponieważ prąd zwarciowy jest detekowany przez dedykowany superkrótki bezpiecznik sterowanie musi być dostosowane do czasu przedrukowego i łukowego topika, które zależą od aktualnej wartości prądu i aktualnej konfiguracji obwodu....

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• Paweł Burdziakowski dr inż.

  Osoby

  Katedra Geodezji

  dr inż. Paweł Burdziakowski jest specjalista w zakresie fotogrametrii i teledetekcji lotniczej niskiego pułapu, nawigacji morskiej i lotniczej. Jest również licencjonowanym instruktorem lotniczym oraz programistą. Głównymi obszarami zainteresowania jest fotogrametria cyfrowa, nawigacja platform bezzałogowych oraz systemy bezzałogowe, w tym lotnicze, nawodne, podwodne. Prowadzi badania  w zakresie algorytmów i metod poprawiających...

• Impedance Measurement and Selection of Electrochemical Equivalent Circuit of a Working PEM Fuel Cell Cathode

  Publikacja

  • K. Darowicki
  • Ł. Gaweł

  - Electrocatalysis - Rok 2017

  The dynamic impedance analysis of direct methanolfuel cell (DMFC) cathode supplied with pure oxygen is pre-sented. Presented results were obtained during dynamic chang-es of the current density in working fuel cell. Investigation ofthe occurring processes at cathode was carried with dynamicelectrochemical impedance spectroscopy (DEIS). A discussionwas conducted based on the determined correlation parameterχ2. It was shown that...

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• The influence of dynamic load changes on temporary impedance in hydrogen fuel cells, selection and validation of the electrical equivalent circuit

  Publikacja

  • K. Darowicki
  • E. Janicka
  • M. Mielniczek
  • A. Zieliński
  • Ł. Gaweł
  • J. Mitzel
  • J. Hunger

  - APPLIED ENERGY - Rok 2019

  To achieve optimal performance of a fuel cell, a reliable monitoring and diagnostic method is required. The currently utilized methods give limited information or they are impossible to use under dynamic working conditions. To obtain comprehensive information about the fuel cell operation we utilized novel dynamic electrochemical impedance spectroscopy. Impedance measurements in dynamic mode were performed on a hydrogen fuel cell,...

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• Michał Michna dr hab. inż.

  Osoby

  Katedra Energoelektroniki i Maszyn Elektrycznych

  Jest absolwentem Wydziału Elektrycznego Politechniki Gdańskiej (1998). W 2004 r. uzyskał stopień doktora. Od 2004 r. zatrudniony w Katedrze Energoelektroniki i Maszyn Elektrycznych Politechniki Gdańskiej (asystent, adiunkt, starszy wykładowca). W latach 2010-2015 zastępca kierownik katedry. Jego zainteresowania naukowe i dydaktyczne obejmują szerokie spektrum zagadnień związanych z projektowanie, modelowanie i diagnostyką maszyn...

• MEASUREMENT

  Czasopisma

  ISSN: 0263-2241 , eISSN: 1873-412X

• Magnetic and capacitive couplings influence on power and energy measurement in double circuit high voltage overhead transmission line

  Publikacja

  • Z. Lubośny
  • J. Klucznik
  • K. Dobrzyński
  • S. Czapp
  • R. Kowalak
  • S. Pokora
  • R. Trębski

  - Rok 2016

  The paper discusses influence of magnetic and capacitive couplings on power and energy measurement in case of double circuit high voltage overhead transmission line. There are presented and discussed various factors influencing the power flow among the line‟s circuits. Mathematical model based calculations results are compared to the real transmission line measurements.

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• Verification of safety in low-voltage power systems without nuisance tripping of residual current devices

  Publikacja

  • S. Czapp
  • K. Borowski

  - ELECTRIC POWER SYSTEMS RESEARCH - Rok 2019

  Low-voltage power systems require initial and periodical verification to check the effectiveness of protection against electric shock. As a protection in case of fault, automatic disconnection of supply is most often used. To verify such a protection measure, the earth fault loop impedance or resistance is measured. This measurement is easy to perform in circuits without residual current devices. When residual current devices are...

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• Piotr Grudowski dr hab. inż.

  Osoby

  Katedra Inżynierii Zarządzania i Jakości

  Dr hab. inż. Piotr Grudowski, profesor w Politechnice Gdańskiej karierę naukową rozpoczynał na Wydziale Mechanicznym Technologicznym Politechniki Gdańskiej w zespole „Inżynierii Jakości i Metrologii”. Stopień doktora nauk technicznych w dyscyplinie budowa i eksploatacja maszyn uzyskał w roku 1993 na Wydziale Mechanicznym PG a stopień doktora habilitowanego nauk ekonomicznych, w dyscyplinie nauk o zarządzaniu, w 2008 roku na Wydziale...

• Measurement Automation Monitoring

  Czasopisma

  ISSN: 2450-2855

• Power Hardware-in-the-Loop Approach In Power System Development

  Publikacja

  • F. Kutt
  • Ł. Sienkiewicz
  • A. Melchert
  • W. Pawlicki

  - Rok 2018

  The main objective of the research is the verification of the Power Hardware-In-The-Loop (PHIL) approach in power system analysis and design. The premise of the article is that using PHIL approach the performance of the power system in steady and transient state conditions can be analysed in real power system conditions. Models of induction machine were developed and real time simulations were performed. Simulation variables were...

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• Jarosław Guziński prof. dr hab. inż.

  Osoby

  Wydział Elektrotechniki i Automatyki, Katedra Automatyki Napędu Elektrycznego i Konwersji Energii

  STOPNIE NAUKOWE 2021 Tytuł profesora nauk inżynieryjno-technicznych. 2012  Stopień doktora habilitowanego nauk technicznych – Wydział Elektrotechniki i Automatyki PG. Rozprawa habilitacyjna „Układy napędowe z silnikami indukcyjnymi i filtrami wyjściowymi falowników. Zagadnienia wybrane”. Kolokwium i nadanie stopnia doktora habilitowanego 29 maja 2012 r. Monografia uzyskała nagrodę naukową Wydziału IV Nauk Technicznych Polskiej...

• Using A Particular Sampling Method for Impedance Measurement

  Publikacja

  • G. Lentka

  - Metrology and Measurement Systems - Rok 2014

  The paper presents an impedance measurement method using a particular sampling method which is an alternative to DFT calculation. The method uses a sine excitation signal and sampling response signals proportional to current flowing through and voltage across the measured impedance. The object impedance is calculated without using Fourier transform. The method was first evaluated in MATLAB by means of simulation. The method was...

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• Investigation on accelerated impedance spectrum measurement method with multisine signal stimulation

  Publikacja

  • M. Niedostatkiewicz
  • R. Zielonko

  - Metrology and Measurement Systems - Rok 2009

  The paper presents an investigation on the accelerated impedance spectrum measurement method, oriented at parameter identification of technical objects modelled by a linear equivalent circuit, e.g. anticorrosion coatings.The method is based on multisine signal stimulation of an object and response analysis by triangle window filterbanks.It has several advantages, as compared with conventional point-by-point spectrum measurement....

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• Power Hardware-In-the-Loop Approach for Autonomous Power Generation System Analysis

  Publikacja

  • S. Racewicz
  • F. Kutt
  • Ł. Sienkiewicz

  - ENERGIES - Rok 2022

  The article presents the Power Hardware-In-the-Loop (PHIL) dynamic model of a synchronous generator of 125 kVA for autonomous power generation system analysis. This type of system is typically composed of electrical energy sources in the form of several diesel generator units with synchronous machines, the main distribution switchboard and different loads. In modern power distribution systems, the proposed power management strategies...

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• Multispectral impedance quality testing of coil-coating system using principal component analysis

  Publikacja

  • A. Miszczyk
  • K. Darowicki

  - PROGRESS IN ORGANIC COATINGS - Rok 2010

  The task of quality checking of the coil-coated system was undertaken using impedance spectroscopy. In order to properly characterize the system the new impedance spectrum was calculated as an averaged result of 12 experimental spectra obtained from 12 different places of the sample at the same time of immersion in 3% of NaCl. The experimental spectra were recorded for a 24-h period at 1 h intervals between starting points of each...

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• Calculations of Short-Circuit Current Flows in Earth Wires of HV Lines

  Publikacja

  • J. Klucznik
  • Z. Lubośny
  • K. Dobrzyński

  - Acta Energetica - Rok 2016

  This paper presents a method which enables calculating flows of short-circuit currents in earth wires of high voltage transmission lines, and its implementation in the form of a computer programme. The algorithm enables performing calculations for a double-fed line and starconnected lines (three terminal lines). The developed programme enables verifying dimensioning of earth wires in the context of their short-circuit thermal withstand...

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• Models of Brushless Synchronous Generator for Studying Autonomous Electrical Power System

  Publikacja

  • F. Kutt

  - Rok 2020

  This is a PhD dissertation. The work presented in this monograph was carried out at the Department of Power Electronics and Electrical Machines, Faculty of Electrical and Control Engineering at the Gdansk University of Technology. Developed during the research models of brushless synchronous generator ware verified using FEM based simulations and measurements conducted on the prototype generator. The main focus of the research...

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• Effect of hybrid contactless short-cicruit limiters on power quality

  Publikacja

  • P. Leśniewski
  • Ł. Tłustochowicz

  - Rok 2005

  Przedstawiono działanie bezstykowego ogranicznika prądów zwarciowych w oparciu o symulację komputerową. Szczególną uwagę zwrócono na problem jakości dostarczanej energii elektrycznej poprzez ograniczanie zapadów napięcia za pomocą bezstykowego ogranicznika prądów zwarciowych. W modelowaniu elementów systemu elektroenergetycznego i zapadów napięcia, będących skutkiem zwarć wykorzystano program MATLAB z biblioteką Power System Blockset....

• Magnetic and capacitive couplings influence on power losses in double circuit high voltage overhead transmission line

  Publikacja

  • J. Klucznik
  • Z. Lubośny
  • K. Dobrzyński
  • S. Czapp
  • R. Kowalak
  • R. Trębski
  • S. Pokora

  - COMPEL-THE INTERNATIONAL JOURNAL FOR COMPUTATION AND MATHEMATICS IN ELECTRICAL AND ELECTRONIC ENGINEERING - Rok 2017

  Purpose – The paper aims to discuss problems of power and energy losses in a double-circuit overhead transmission line. It was observed from energymeters’ readings, that in such a line, active power losses can be measured as “negative”. The “negative” active power losses appear when the active power injected to the circuit is lower than the active power received at the circuit end. The purpose of this paper is to explain this phenomenon. Theoretical...

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• The measurement of input power of power supply in network disturbed by low frequency distortions

  Publikacja

  • S. Galla
  • A. Szewczyk

  - Przegląd Elektrotechniczny - Rok 2016

  In the paper authors present results of observation of input power changes versus harmonics amplitude in supply voltage of low-power power supply device. In the study, the electrical measurements supported with thermal imaging were used. The input circuit elements of studied device responsible for input power increase are pointed

  Pełny tekst do pobrania w portalu

• Metrology and Measurement Systems

  Czasopisma

  ISSN: 0860-8229 , eISSN: 2300-1941

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

  Publikacja

  • A. Bielecka
  • D. Wojciechowski

  - ENERGIES - Rok 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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• Novel Fault Identification for Electromechanical Systems via Spectral Technique and Electrical Data Processing

  Publikacja

  • T. Ciszewski
  • L. Gelman
  • A. Ball

  - Electronics - Rok 2020

  It is proposed, developed, investigated, and validated by experiments and modelling for the first time in worldwide terms new data processing technologies, higher order spectral multiple correlation technologies for fault identification for electromechanical systems via electrical data processing. Investigation of the higher order spectral triple correlation technology via modelling has shown that the proposed data processing technology...

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• Automatic tuning of a resonant circuit in wireless power supply systems for biomedical sensors

  Publikacja

  • G. Blakiewicz
  • J. Jakusz
  • W. Jendernalik
  • S. Szczepański

  - Bulletin of the Polish Academy of Sciences-Technical Sciences - Rok 2016

  In this paper, a tuning method of a resonant circuit suited for wireless powering of miniature endoscopic capsules is presented and discussed. The method allows for an automatic tuning of the resonant frequency and matching impedance of a full wave rectifier loading the resonant circuit. Thereby, the receiver tunes so as to obtain the highest power efficiency under given conditions of transmission. A prototype receiver for wireless...

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• Grzegorz Lentka dr hab. inż.

  Osoby

  Wydział Elektroniki, Telekomunikacji i Informatyki, Katedra Metrologii i Optoelektroniki

  Grzegorz Lentka uzyskał tytuł magistra inżyniera w roku 1996 na Wydziale Elektroniki, Telekomunikacji i Informatyki Politechniki Gdańskiej w zakresie systemów pomiarowych. Stopień doktora nauk technicznych uzyskał w roku 2003, a doktora habilitowanego w 2014. Obecnie zatrudniony jest w Katedrze Metrologii i Optoelektroniki na stanowisku profesora PG. W ramach prowadzonej dydaktyki zajmuje się zagadnieniami związanymi z interfejsami...

• A measurement method for lossy capacitive relative humidity sensors based on a direct sensor-to-microcontroller interface circuit

  Publikacja

  • Z. Czaja

  - MEASUREMENT - Rok 2021

  A new time-domain measurement method for determining the capacitance and resistance values of lossy relative humidity capacitive sensors is presented. The method is based on a direct sensor-to-microcontroller interface for microcontrollers with internal analog comparators and timers. The interface circuit consists only of four reference resistors (two reference resistors if a microcontroller includes a voltage reference source),...

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• Scalable Measurement System for Multiple Impedance Gas Sensors

  Publikacja

  • G. Lentka

  - MAPAN-Journal of Metrology Society of India - Rok 2017

  Author proposes scalable architecture of the measurement system for gas sensor with impedance dependance of the gas concentration. The main part of the system is a single-board impedance analyser. The number of analysers working in parallel can be configured according to specific application. The system is controlled by a single computer which organises the measurement cycle and store the acquired measurement data. The system is...

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• Fault Diagnostics in PEMFC Stacks by Evaluation of Local Performance and Cell Impedance Analysis

  Publikacja

  • J. Mitzel
  • J. Sanchez‐Monreal
  • D. Garcia‐Sanchez
  • P. Gazdzicki
  • M. Schulze
  • F. Häußler
  • J. Hunger
  • G. Schlumberger
  • E. Janicka
  • M. Mielniczek
  • Ł. Gaweł

  - FUEL CELLS - Rok 2020

  Starvation, flooding, and dry‐out phenomena occur in polymer electrolyte membrane fuel cells (PEMFCs), due to heterogeneous local conditions, material inhomogeneity, and uneven flow distribution across the single cell active area and in between the individual cells. The impact of the load level and air feed conditions on the performance was identified for individual single cells within a 10‐cell stack. Analysis of the current density...

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• Modern power-electronics installations in the Polish electrical power network

  Publikacja

  • G. Benysek
  • R. Strzelecki

  - RENEWABLE & SUSTAINABLE ENERGY REVIEWS - Rok 2011

  The paper discusses the most important areas of application of power electronics arrangements in the Polish electrical power system; especially in the distribution system. The examples presented demonstrate both the need for and the purpose of further research and its applications in these fields, as well as indicating the direction of future research, with special consideration given to the research required in Poland. The proposed...

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