Sökning: "voltage sag"

Visar resultat 1 - 5 av 10 avhandlingar innehållade orden voltage sag.

  1. 1. Voltage sags characterisation and estimation

    Författare :Roberto Chouhy Leborgne; Chalmers University of Technology; []
    Nyckelord :sag estimation.; Power quality; voltage sags dips ; sag characterisation;

    Sammanfattning : .... LÄS MER

  2. 2. On impacts and ride-through of voltage sags exposing line-operated AC-machines and metal processes

    Författare :Fredrik Carlsson; KTH; []
    Nyckelord :Rolling mill; Blast furnace; Power Quality; Synchronous machine; Asynchronous machine; Voltage sag; Voltage interruption; Ride-through; Process disturbances; Simulation; Modelling;

    Sammanfattning : During the last decade, power quality has been recognised asa global problem. Among different types of power qualityproblems, voltage sags have been identified to be one of themost severe problems for different process industries. The mostcommon reason to voltage sags is lightning strikes in powerlines. LÄS MER

  3. 3. Voltage Dip (Sag) Estimation in Power Systems based on Stochastic Assessment and Optimal Monitoring

    Författare :Gabriel Olguin; Chalmers University of Technology; []
    Nyckelord :power quality; symmetr?cal components; stochastic methods; impedance matrix; voltage dips; integer optimisation; power systems; short-circuit faults; voltage sags;

    Sammanfattning : This dissertation deals with the statistical characterization of the performance of power systems in terms of voltage dips (sags). It presents a method named voltage dip estimation that extends monitoring results to buses not being monitored. LÄS MER

  4. 4. Control of Voltage Source Converters for Voltage Dip Mitigation in Shunt and Series Configurations

    Författare :Massimo Bongiorno; Chalmers University of Technology; []
    Nyckelord :Power Quality; Current Controller; Voltage Source Converter VSC .; Power Electronics; Voltage Dip Sag ;

    Sammanfattning : Custom Power is the application of power electronics to improve the quality of power distribution for sensitive industrial plants. Industries reporting production stops due to voltage disturbances, like short interruptions and voltage dips, include paper mills, semiconductors facilities and other industries with fully automated production. LÄS MER

  5. 5. On Control of Grid-connected Voltage Source Converters - Mitigation of Voltage Dips and Subsynchronous Resonances

    Författare :Massimo Bongiorno; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Power Electronics; Voltage Source Converter VSC ; Power Quality; Current Controller; Voltage Dip Sag ; Subsynchronous Resonance SSR .;

    Sammanfattning : Custom Power and Flexible AC Transmission Systems (FACTS) denote the application of power electronics in distribution and transmission networks, respectively. Custom Power is the application of power electronics to improve the quality of power distribution for sensitive industrial plants. LÄS MER