Sökning: "Voltage stability indicators"

Hittade 3 uppsatser innehållade orden Voltage stability indicators.

  1. 1. Control methods against voltage collapse based on real-time calculation of voltage stability indicators

    H-uppsats, Chalmers tekniska högskola/Institutionen för elektroteknik

    Författare :Ahmad Sultan Esreb; [2017]
    Nyckelord :Monitoring; Voltage stability; Voltage collapse; Impedance Stability Index;

    Sammanfattning : Power systems always face disturbances, which could lead to voltage collapse or blackout, and weaken with the increase of power demand or load, which is an everyday challenge to Transmission System Operators (TSOs). Nowadays, there aren’tspecific methods to prevent voltage instability or collapse if a disturbance occurs in a system. LÄS MER

  2. 2. Development of a system protection model against voltage collapse in PSS/E

    H-uppsats, Chalmers tekniska högskola/Institutionen för energi och miljö

    Författare :David Stenberg; Joakim Åkesson; [2016]
    Nyckelord :Voltage stability; Voltage stability indicators; Impedance stability index ISI ; Transmission path stability index TPSI ; PSS E; System protection relay model; Automatic voltage regulator AVR ; Load shedding;

    Sammanfattning : This thesis investigates voltage instability leading to voltage collapse in PSS/E andhow such scenario can be prevented by the use of a system protection model whichhas been proposed and developed in this thesis. The model sees the system as awhole and can initiate a system protection response based on a voltage stabilityindicator in parallel with signals from over excitation limiters (OELs). LÄS MER

  3. 3. Undersökning av exponeringsindex för bildplattesystem inför optimeringsarbete

    Uppsats för yrkesexamina på grundnivå, Linköpings universitet/Institutionen för medicinsk teknik

    Författare :Magnus Lömäng; [2004]
    Nyckelord :Biotechnology; computed radiography; dose optimization; exposure index; Bioteknik;

    Sammanfattning : The county hospital of Dalarna has for the last couple of years carried through a process of digitalization. The result is that within the county it exists image plate systems from two different manufacturers. LÄS MER