Recent Submissions

  • Evaluation of Harmonics Impact on Digital Relays 

    Wannous, Kinan Hasan Wafaa; 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 ...
  • 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. ...
  • Analysis of Dense-Mesh Distribution Network Operation Using Long-Term Monitoring Data 

    Ptáček, Michal; Vyčítal, Václav; Toman, Petr; Vaculík, Jan (MDPI, 2019-11-14)
    The technical and economic aspects and the possibility of the mesh network topology offering many radial configurations lead to the fact that large municipal networks are generally under radial operation. However, it is ...
  • 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 ...
  • Analysis of IEC 61850-9-2LE Measured Values Using a Neural Network 

    Wannous, Kinan Hasan Wafaa; Toman, Petr; Jurák, Viktor; Wasserbauer, Vojtěch (MDPI, 2019-04-28)
    Process bus communication has an important role to digitalize substations. The IEC 61850-9-2 standard specifies the requirements to transmit digital data over Ethernet networks. The paper analyses the impact of IEC 61850-9-2LE ...
  • 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 ...
  • The definition of input parameters for modelling of energetic subsystems 

    Ptáček, Michal (EDP Sciences, 2013-06-26)
    This paper is a short review and a basic description of mathematical models of renewable energy sources which present individual investigated subsystems of a system created in Matlab/Simulink. It solves the physical and ...