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Catalog Publications

Year 2018
  • Stabilność systemu elektroenergetycznego
    Publication

    - Year 2018

    Książka na 900 stronach prezentuje w sposób dogłębny zagadnienia związane ze stabilnością systemów elektroenergetycznych.

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  • THE INFLUENCE OF PHASE SHIFTERS ON THE VOLTAGE STABILITY OF CONNECTED POWER SYSTEMS
    Publication

    The paper presents the results of simulation tests of connected power systems in which phase shifters were installed on cross-border links. The analysis was carried out in terms of assessing the impact of shifters on node voltage stability. Individual systems were characterized by different balance of active power: deficit or excess. The evaluation of voltage stability was based on the dU/dQ and dU/dP criteria.

  • Uniwersalna metoda obliczania wartości prądów w przewodach odgromowych linii napowietrznych
    Publication

    - elektro.info - Year 2018

    W artykule przedstawiono nowatorską metodę obliczania wartości prądów płynących w przewodach odgromowych linii elektroenergetycznych w czasie zwarć. Metoda może być stosowana dla złożonych układów sieciowych, składających się z kilku stacji oraz różnych typów linii. Analizowane mogą być linie jedno- i dwutorowe z jednym bądź dwoma przewodami odgromowymi. Metoda pozwala na dobór przewodów odgromowych pod względem wytrzymałości cieplnej...

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Year 2011
Year 2007
Year 2008
Year 2016
Year 2013
Year 2012
Year 2003
Year 2022
Year 2015
Year 2002
Year 2009
Year 2014
Year 2020
  • Testing sensitivity of A-type residual current devices to earth fault currents with harmonics
    Publication

    - SENSORS - Year 2020

    In many applications, modern current-using equipment utilizes power electronic converters to control the consumed power and to adjust the motor speed. Such equipment is used both in industrial and domestic installations. A characteristic feature of the converters is producing distorted earth fault currents, which contain a wide spectrum of harmonics, including high-order harmonics. Nowadays, protection against electric shock in...

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  • The Impact of Micro-Sources on Voltage Distortions in a Power Grid
    Publication

    The increase in the number of photovoltaic (PV) systems integrated with low voltage (LV) grids has led to a great need to analyse the impact of these systems on the quality of electricity and the reliability of its supply. This paper presents and compares the energy quality requirements imposed by various countries on photovoltaic plants. Then, based on real object tests and simulation in DIgSILENT PowerFactory, the impact has...

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  • Underfrequency Load Shedding: An Innovative Algorithm Based on Fuzzy Logic
    Publication

    In contemporary power systems, the load shedding schemes are typically based on disconnecting a pre-specified amount of load after the frequency drops below a predetermined value. The actual conditions at the time of disturbance may largely dier from the assumptions, which can lead to non-optimal or ineective operation of the load shedding scheme. For many years, increasing the eectiveness of the underfrequency load shedding (UFLS)...

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  • Virtual inertia in Electric Power System

    The article presents the idea of introducing virtual inertia system to the electric power systems. The virtual inertia aim is to reduce or eliminate the effect of reducing the inertia of the power system as a result of replacing classic electricity generating units with renewable renergy sources (RES). The considerations are ilustrated by a computational example.

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Year 2017
Year 2010
Year 2023
Year 2021
  • Time-current tripping characteristics of RCDs for sinusoidal testing current
    Publication

    - Year 2021

    Low-voltage electrical installations are verified initially – before being put into operation, as well as periodically – during their utilization. According to the IEC standards, the scope of the verification includes measurements of both the tripping current and the disconnection time of residual current devices (RCDs). Experiences in RCDs testing show that disconnection times of two or more similar RCDs can be quite different....

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  • Tripping of F-type RCDs for high-frequency residual currents
    Publication

    - Year 2021

    Residual current devices (RCDs) are apparatus commonly used for protection against electric shock in low-voltage electrical installations. They protect people in the case of an earth fault or even in the case of direct contact with the live parts. However, to be effective protective devices, RCDs have to detect residual currents of various waveform shapes which appear in modern electrical installations. For this purpose, RCDs are...

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  • Tripping of F-type RCDs for High-Frequency Residual Currents
    Publication

    - Year 2021

    Residual current devices (RCDs) are apparatus commonly used for protection against electric shock in low-voltage electrical installations. They protect people in the case of an earth fault or even in the case of direct contact with the live parts. However, to be effective protective devices, RCDs have to detect residual currents of various waveform shapes which appear in modern electrical installations. For this purpose, RCDs...

Year 2019
Year 2006
  • Uwarunkowania ekonomicznej efektywności pomp ciepła
    Publication

    - Year 2006

    Wzrastające zainteresowanie wykorzystaniem pomp ciepła w gospodarce komunalno-bytowej wymaga dokładnego rozeznania różnego rodzaju uwarunkowań technicznych i ekonomicznych. w książce podjęto próbę usystematyzowania tej tematyki. Omówiono sposób obliczania bilansu energetycznego ogrzewanych budynków, źródeł ciepła - wśród nich bilans energetyczny pompy ciepła. Zaproponowano możliwie najprostsze metody obliczania - dostępne dla...

  • Uwarunkowania rozwoju lokalnego rynku energii - analiza przypadku
    Publication

    - Year 2006

    Omówiono przypadek lokalnego rynku energii na którym pojawił się nowy, duży odbiorca ciepła i energii elektrycznej. Przeanalizowano uwarunkowania funkcjonowania przedsiębiorstw energetycznych na takim rynku i ich uwarunkowania rozwojowe.

  • Uwarunkowania rozwoju lokalnego rynku energii - analiza przypadku
    Publication

    - Rynek Energii - Year 2006

    W artykule omówiono przypadek lokalnego rynku energii, na którym pojawił się nowy, duży odbiorca ciepła i energii elektrycznej. Znacząco zmieniło to uwarunkowania rozwojowe dla przedsiębiorstw energetycznych. Charakterystykę nowego odbiorcy przedstawiono we wcześniejszym artykule (Rynek energii nr 3/2006). Niniejsza publikacja przedstawia wyniki analiz uzupełniających opłacalności zastosowania układu skojarzonego do zasilania w...