Sökning: "HVAC transmission"

Visar resultat 1 - 5 av 10 uppsatser innehållade orden HVAC transmission.

  1. 1. Optimal collection grid and transmission line topology for the grid connection of an offshore multi-source park.

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Elektricitetslära

    Författare :Alfred Nerby; [2022]
    Nyckelord :Renewable; Wind; Solar; multi-source; park; collection grid; substation; transmission; HVAC; HVDC; converters; shunt reactors; transformer; losses; CAPEX; OPEX;

    Sammanfattning : As spacial restrictions become more and more of an issue for renewable energy parks onshore, more developers are turning offshore to develop future production. The desire for a diversity of energy sources combined with a desire to utilize space efficiently has sparked an interest in renewable energy parks where more than one energy source occupy the space. LÄS MER

  3. 2. Transmission Systems for Grid Connection of Offshore Wind Farms : HVAC vs HVDC Breaking Point

    Uppsats för yrkesexamina på avancerad nivå,

    Författare :Jesper Larsson; [2021]
    Nyckelord :Wind power; Offshore wind; Power systems; Transmission; HVAC; Reactive power; HVDC; VSC; MMC; Breaking point; LCOE; NPV;

    Sammanfattning : Offshore wind is rapidly growing and optimised grid connections are crucial for its success. Generally, costs and losses are higher for HVDC at short distances due to the converters, while HVAC costs and losses increase more rapidly with distance due to the ac cables. LÄS MER

  4. 3. Analysis of harmonic cross-modulation in HVDC line-commutated converters for practical design purposes

    Uppsats för yrkesexamina på grundnivå, Högskolan Väst/Avdelningen för Industriell ekonomi, Elektro- och Maskinteknik

    Författare :Casper Karlsson; [2018]
    Nyckelord :Power transmission; design; filters;

    Sammanfattning : The use of HVDC has many benefits over HVAC for some specific power transmission purposes. However, two major problems with HVDC links are that the converters produce harmonics and consume reactive power. Electrical filters are used to compensate for this and are a major cost driver of HVDC links. LÄS MER

  5. 4. Power Loss Evaluation of Submarine Cables in 500 MW Offshore Wind Farm

    Magister-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Lahiru Kushan Jayasinghe; [2017]
    Nyckelord :Power Loss; Offshore Windfarm; Submarine Cables; HVAC; HVDC LCC; HVDC VSC; MATLAB Simulink;

    Sammanfattning : The main objective of this thesis is to develop a new methodology to evaluate the transmission cable losses of wind-generated electricity. The research included the power loss variations of submarine cables in relation to the line length, cable capacity and the transmission technology in an offshore wind farm having a capacity of 500 MW. LÄS MER

  7. 5. Energieffektivisering av Lokverkstaden i Gamla Motala Verkstad : Uppvärmnings- och Ventilationssystem

    M1-uppsats, Mälardalens högskola/Akademin för ekonomi, samhälle och teknik

    Författare :Prosper Niyonkuru; Marc Mugisho; [2016]
    Nyckelord :Energy efficiency; ventilation; heating; air handling units; simulations program; indoor climate; heat exchanger; Energieffektivisering; ventilationssystem; uppvärmningssystem; luftbehandlingsaggregat; simuleringsprogram; inneklimat; värmeväxlare;

    Sammanfattning : Nästan alla forskningar om klimatförändringar påpekar att de accelererande klimatförändringarna vi ser till stor del orsakas av mänskliga verksamheter. Om vi inte reducerar energianvändningen kommer våra utsläpp av växthusgaser öka kraftigt och det kan leda till en katastrof i framtiden. LÄS MER