Sökning: "PSCAD EMTDC"

Visar resultat 1 - 5 av 11 uppsatser innehållade orden PSCAD EMTDC.

  1. 1. Damping of sub-synchronous control interactions with a STATCOM : Wind farms & series compensated power lines

    Master-uppsats, Uppsala universitet/Institutionen för elektroteknik

    Författare :Leonardo Alvarez Urrutia; [2022]
    Nyckelord :Sub-Synchronous Control Interactions; Power Systems; STATCOM; Network Stability; Doubly-Fed Induction Generator; Impedance-Based Stability Analysis;

    Sammanfattning : The power converter is one of the key components in power system applications such as high voltage direct current (HVDC) systems and the grid connection of intermittent sources such as wind and solar power. However, the increased penetration of converter-based generation introduces challenges, such as sub-synchronous interaction between the converter control system and the grid. LÄS MER

  3. 2. Evaluation of DC Fault Current in Grid Connected Converters in HVDC Stations

    Master-uppsats, Uppsala universitet/Institutionen för elektroteknik

    Författare :Soham SinhaRoy; [2022]
    Nyckelord :Symmetrical monopole; HVDC LCC and VSC; CTL; MMC; Converter reactor; DC smoothing reactor; DC pole-to-pole fault; Peak factor; SCC; SCR; PSCAD EMTDC;

    Sammanfattning : The main circuit equipment in an HVDC station must be rated for continuous operation as well as for stresses during ground faults and other short circuits. The component impedances are thus selected for proper operation during both continuous operation and short circuit events. LÄS MER

  4. 3. Evaluation of Symmetrical Components Theory in Power Systems with Renewable Sources

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Daniil Danylov; [2021]
    Nyckelord :Symmetrical components theory; fault analysis; renewable sources; power electronics; PSCAD EMTDC; two bus system; inverter-based resources; line protection; nonlinear source.; Teori om symmetriska komponenter; felanalys; förnybara källor; kraftelektronik; PSCAD EMTDC; tvåbussystem; inverterbaserade resurser; linjeskydd; icke- linjär källa.;

    Sammanfattning : Rapidly growing Inverter- Based Resources (IBR) have different fault properties compared to Synchronous Generators (SG). Therefore, it is necessary to study the fault behavior of systems that contain different types of IBR and compare it to the conventional system responses in order to understand what steps should be taken to adapt conventional protection settings for new types of sources. LÄS MER

  5. 4. Evaluation of critical fault scenarios for operation with inherent overload in HVDC stations

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Elektricitetslära

    Författare :Lisa Sander; [2018]
    Nyckelord :HVDC; Modular multilevel converter; VSC; transient currents; transient voltages; inherent overload; converter bus fault; pole to pole fault;

    Sammanfattning : The HVDC, High Voltage Direct Current, is important when it comes to upgrading the energy system to a renewable, sustainable and efficient system. This master thesis is investigating what is happening during the most decisive fault cases when the HVDC station is operating with inherent overload. LÄS MER

  7. 5. 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