Sökning: "Partial discharge"

Visar resultat 1 - 5 av 24 uppsatser innehållade orden Partial discharge.

  1. 1. CFD-modeling of labyrinth weir flood discharge with ice cover

    Master-uppsats, KTH/Betongbyggnad

    Författare :Erik Isberg; [2023]
    Nyckelord :;

    Sammanfattning : A labyrinth weir is a hydraulic structure built with a purpose to increase the discharge capacity compared to linear weirs, while maintaining the same water level upstream. Construction of labyrinth weirs is vital in a future with more unpredictable flows. LÄS MER

  3. 2. Performance Evaluation of a bench-scale Thermochemical Storage System

    Master-uppsats, KTH/Energiteknik

    Författare :Harish Balaji Seetharaman; [2022]
    Nyckelord :Thermal energy storage TES ; Thermochemical heat storage TCS ; SrCl2-NH3; Absorption; Desorption; Monoammine; Octaammine; Performance evaluation.; Termisk energilagring TES ; Termokemisk energilagring TCS ; SrCl2-NH3; Absorption; Desorption; Monoammin; Oktaammin; Utvärdering av prestanda.;

    Sammanfattning : This thesis is part of a joint thermochemical heat storage (TCS) research project named Neutrons for Heat Storage (NHS), involving three Nordic research institutes. The project isfunded by Nordforsk and KTH Royal Institute of Technology for the project partner KTH. LÄS MER

  4. 3. Insulation diagnostics of stator bars

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

    Författare :Alexandra Garðarsdóttir; [2022]
    Nyckelord :Electrical insulation system; Stator bars; Insulation testing; Rotating machines; Partial discharges; Acoustic detection; Dielectric response analysis; Break-down test; Tap test; Elektriskt isoleringssystem; Statorstavar; Isolationsprovning; Roterande maskiner; Partiell urladdning; Akustisk detektering; Dielektrisk responsanalys; Nedbrytningstest; Taptest;

    Sammanfattning : Insulation in rotating machines is a common cause for failure. Therefore, research in the area is large and is important to further increase the knowledge of the phenomena related to insulation degradation. LÄS MER

  5. 4. Dielectric Response and Partial Discharge Characteristics of Stator Winding Insulation System with SiC Stress Grading

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

    Författare :Amar Abideen; [2020]
    Nyckelord :Stator Insulation; Dielectric Frequency Response; Polarization Depolarization Current; Insulation Modelling; FEM simulation;

    Sammanfattning : The typical construction of a stator coil includes the use of end corona protection (ECP)coating, which is made of semi-conductive materials like silicon carbide (SiC). Thepurpose of ECP is to smooth the electric stress distribution near the slot exit, limitingthe electric field and partial discharge (PD) activity within the insulation system. LÄS MER

  7. 5. Measurements of partial discharge in insulators

    Kandidat-uppsats,

    Författare :Elias Johansson; Didrik Olofsson; Philip Lind; Erik Victorin; [2019]
    Nyckelord :Partial discharge; Substations; PDS100;

    Sammanfattning : Causes and effects of partial discharges (PD) inside electrical high-voltage insulation was studied prior to taking measurements with a PDS100 spectralanalyser during excursions to a number of substations in the Swedish electrical grid.This to develop a working-method and manual for workers to use periodically whileon site to be able to identify components on which maintenance is needed. LÄS MER