Search for dissertations about: "voltage sag"

Showing result 1 - 5 of 10 swedish dissertations containing the words voltage sag.

  1. 1. Voltage sags characterisation and estimation

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

    Abstract : .... READ MORE

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

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

    Abstract : 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. READ MORE

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

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

    Abstract : 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. READ MORE

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

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

    Abstract : 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. READ MORE

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

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

    Abstract : 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. READ MORE