Sökning: "symmetrical components"

Visar resultat 1 - 5 av 14 uppsatser innehållade orden symmetrical components.

  1. 1. Modelling Large Protein Complexes

    Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Ho Yeung Chim; [2023]
    Nyckelord :Protein Modeling; Monte Carlo Tree Search; Protein Complex;

    Sammanfattning : AlphaFold [Jumper et al., 2021, Evans et al., 2022] is a deep learning-based method that can accurately predict the structure of single- and multiple-chain proteins. However, its accuracy decreases with an increasing number of chains, and GPU memory limits the size of protein complexes that can be predicted. 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. Real-time detection of stator resistance unbalances in three phase drives

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

    Författare :Bhanu Pratap Singh; [2020]
    Nyckelord :DC voltage injection; Fault detection; Field-Oriented Control; Induction machine; Inter-Turn Short Circuit; Short circuit; Sequence; Stator resistance unbalance; Symmetrical components; likspänningsinjektion; feldetektering; fält orienterad reglering; induktionsmaskin; InterTurn Short Circuit; kortslut; sekvenser; statormotstånd obalans; symmetriska komponenter;

    Sammanfattning : An estimated 30% of the faults in Induction Machine (IM) are related to its stator. These faults are mostly in the form of an Inter-Turn Short Circuit (ITSC) fault i.e., when two winding inside the stator of IM are shorted due to insulation failure. LÄS MER

  7. 5. Lasersvetsning : En genomförbarhetsstudie av stora rotationssymmetriska komponenter med varierande materialsorter

    Master-uppsats, KTH/Industriell produktion

    Författare :Johan Nilsson; [2018]
    Nyckelord :;

    Sammanfattning : A big problem with welding is that it is hard to predict how a high heat canaffect different materials. The effects that can appear is shape changes in thematerial and brittle structures. The brittle structures will affect the strengthof the material and if the shape changes are big, the fatigue strength of thecomponents will be limited. LÄS MER