Sökning: "elkraftteknik"

Visar resultat 1 - 5 av 59 uppsatser innehållade ordet elkraftteknik.

  1. 1. Dynamic Control, Modeling and Sizing of Hybrid Power Plants : Investigating the optimum usage of energy storage for Fortum’s hydropower

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

    Författare :Klas Lindgren; [2023]
    Nyckelord :Hydropower Plants; Energy Storage Systems; Hybrid Units; Frequency Regulation; Modeling; XGBoost Regression; Vattenkraftverk; Energilagringsystem; Hybridkraftverk; Frekvensreglering; Modellering; XGBoost Regression;

    Sammanfattning : The rapidly evolving Nordic Power System demands enhanced flexibility and robustness in electricity production. The traditional role of hydropower plants in regulating the grid frequency has been challenged by new criteria for dynamic stability, which some units struggle to meet due to their relatively poor dynamic performance. LÄS MER

  3. 2. Pumped-Storage Hydroelectricity for a Sustainable Electricity Transition

    Master-uppsats, KTH/Numerisk analys, NA

    Författare :Teodor Elmfeldt; [2023]
    Nyckelord :Pumped-storage hydroelectricity; Electric grid; Computational Mathematics; Juktan Power Station; Applied mathematics; Power system; Sustainability; Pumpkraft; Elnät; Beräkningsmatematik; Juktan Kraftverk; Tillämpad mate- matik; Elkraftteknik; Hållbarhet;

    Sammanfattning : This master thesis explores the application of Pumped-Storage Hydroelectricity (PSH) within an electricity market characterised by a substantial share of renewable and intermittent electricity production. The purpose of PSH is to enhance the alignment of supply with demand by storing energy at electricity surplus and releasing it during shortage. LÄS MER

  4. 3. SAVINGS OF MATERIAL RESOURCES AND CARBON EMISSIONS WHEN CONVERTING FOSSIL FUEL CAR TO ELECTRIC : A CASE STUDY FOR SWEDEN

    Master-uppsats, KTH/Integrated Transport Research Lab, ITRL; KTH/Elkraftteknik

    Författare :Daniel Hiller; [2022]
    Nyckelord :LCA; carbon emissions; material resources; fossil fuel vehicles; battery electric vehicles; carculator; Sweden; LCA; Kohlenstoffemissionen; Materialressourcen; Fahrzeuge mit fossilen Brennstoffen; batterieelektrische Fahrzeuge; carculator; Schweden;

    Sammanfattning : Transportation in Sweden currently accounts for one-third of domestic GHG emissions. Thereof more than 90 % are allocated to road traffic with passenger cars being the largest contributor. Hence, the Swedish government adopted stringent climate policies to cut transport emissionsby 70 % (compared to 2010) latest until 2030. LÄS MER

  5. 4. Undersökning om likströmmars påverkan på jordfelsbrytare

    Uppsats för yrkesexamina på grundnivå, Högskolan i Halmstad/Akademin för informationsteknologi

    Författare :Alexander Axelsson; Viktor Karlsson; [2020]
    Nyckelord :Jordfelsbrytare;

    Sammanfattning : Denna rapport är ett examensarbete skrivet av studenter på Högskolan i Halmstad som läser elektroingenjörsprogrammet med inriktning elkraftteknik. Examensarbetet beskriver en undersökning av jordfelsbrytare, med fokus på jordfelsbrytare av typ A och hur deras beteende ändras vid närvaro av likströmmar. LÄS MER

  7. 5. Design and performance comparison of Two-level and Multilevel Converters for HVDC Applications

    H-uppsats,

    Författare :Carlos Castillo Bonilla; Sweta Merilyn Tigga; [2019-07-03]
    Nyckelord :Elkraftteknik; Electric power engineering;

    Sammanfattning : The purpose of this thesis is to compare a two-level and a multilevel converter for HVDC substation. For this study, both topologies were designed with different modulation strategies and compared on the basis of size, power losses and impact on power quality. LÄS MER