Now showing items 3-6 of 6

  • Evaluation of Harmonics Impact on Digital Relays 

    Wannous, Kinan; Toman, Petr (MDPI, 2018-04-11)
    This paper presents the concept of the impact of harmonic distortion on a digital protection relay. The aim is to verify and determine the reasons of a mal-trip or failure to trip the protection relays; the suggested ...
  • On Minimisation of Earthing System Touch Voltages 

    Vyčítal, Václav; Ptáček, Michal; Topolánek, David; Toman, Petr (MDPI, 2019-10-11)
    Finding cost efficient earthing system design with acceptable level of safety might be quite tedious work. Thus, many earthing system engineers try to find the most suitable design either by employing only their best ...
  • A Physical Calibrator for Partial Discharge Meters 

    Krbal, Michal; Pelikán, Luděk; Štěpánek, Jaroslav; Orságová, Jaroslava; Kolcunová, Iraida (MDPI, 2019-05-29)
    This article offers an alternative method of calibrating partial discharge meters for research and teaching purposes. Most current modern calibrators are implemented as precise voltage pulse sources with a coupling capacitor. ...
  • Two-Terminal Algorithm Analysis for Unsymmetrical Fault Location on 110 kV Lines 

    Bukvišová, Zuzana; Orságová, Jaroslava; Topolánek, David; Toman, Petr (MDPI, 2019-03-27)
    This work analyses a two-terminal algorithm designed to locate unsymmetrical faults on 110 kV power transmission lines. The algorithm processes synchronized voltage and current data obtained from both ends of the protected ...