Now showing items 1-7 of 7

  • 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 ...
  • 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 ...
  • Evaluation of different solutions of faulted phase earthing technique for an earth fault current limitation 

    Topolánek, David; Toman, Petr; Ptáček, Michal; Dvořák, Jaromír (IET, 2017-06-12)
    The study is focused on evaluation of different types of prototypes of automatics for additional faulted phase earthing (FPE), which are used for earth fault (EF) current reduction in resonant earthed distribution network. ...
  • Evaluation of Filtered Spark Gap on the Lightning Protection of Distribution Transformers: Experimental and Simulation Study 

    Pourakbari Kasmaei, Mahdi; Mahmood, Farhan; Krbal, Michal; Pelikán, Luděk; Orságová, Jaroslava; Toman, Petr; Lehtonen, Matti (MDPI, 2020-07-24)
    Protection of transformers, as one of the most expensive equipment in the power system, against lightning overvoltage impulses is a vital task. This paper, for the first time so far, investigates the effects of a filtered ...
  • 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 ...
  • 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 ...
  • 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 ...