Sökning: "System protection relay model"

Hittade 3 uppsatser innehållade orden System protection relay model.

1. 1. Modellering av Forsmarks 10 kV nät system 637 i PowerFactory : Undersökning med avseende på belastning och selektivitet

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Elektricitetslära

   Författare :Albert Nilsson; [2019]
   Nyckelord :Forsmark selektivplaner lastflödesberäkningar kortslutningsberäkningar;

   Sammanfattning : This master thesis is done within the Energy Systems Engineering program at Uppsala University and performed for Forsmarks Kraftgrupp, Vattenfall. The distribution grid for the outer area of the nuclear power plant at Forsmark is an old grid from the time during construction of the plant which later became permanent. LÄS MER

3. 2. The impacts of series compensated EHV lines on distance protection, and a proposed new mitigation solution

   Master-uppsats, KTH/Elektroteknisk teori och konstruktion

   Författare :Syed Arif Ullah Shah; [2017]
   Nyckelord :Series compensation; metal oxide varistor; voltage inversion; current inversion; sub-synchronous oscillation; quadrilateral characteristic distance relay; digital high-pass filter; Seriekompensation; metalloxidvaristor; spänningsinversion; ströminversion; subsynkron oscillation; fyrsidig karakteristiskt distansrelä; digitalt högpassfilter;

   Sammanfattning : Series compensation is extensively applied to the transmission lines to increase the power transfer capability of transmission lines, reduce transmission losses, improve voltage profiles, and improve power oscillation damping and transient stability of power systems. But it modifies the apparent impedance of the transmission lines during fault conditions and might cause the distance protection of transmission lines to encounter directional discrimination issues and reach problems. LÄS MER

4. 3. Interface Between Process Equipment And Process Bus for Light Weight Testing Of Protection Functions

   Master-uppsats, KTH/Industriella informations- och styrsystem

   Författare :Zeeshan Ali Khurram; [2012]
   Nyckelord :;

   Sammanfattning : The technological advancements in the substation automation give rise to many new challenges for the engineers. The IEC 61850 standard de nes the most advanced techniques towards the digital substation development. It describes the communication mappings for the substation automation of both conventional and digital substations. LÄS MER