Sökning: "francis turbine"

Visar resultat 1 - 5 av 8 uppsatser innehållade orden francis turbine.

  1. 1. Impact from flexible operation on High Head Francis turbines

    Master-uppsats, KTH/Hållfasthetslära (Avd.)

    Författare :Andreas Skorpen; [2018]
    Nyckelord :;

    Sammanfattning : Today the European energy grid contains more renewable energy sources than ever before, yet there is little to no research on how the increased amount affects the cost structure of the remaining energy sources of the grid. A consequence of phasing more renewable energy sources into the power grid, is a reduction of the overall balancing capacity of the grid. LÄS MER

  3. 2. Testbänk för turbinregulator

    Master-uppsats, Uppsala universitet/Elektricitetslära

    Författare :Anders Vårdenius Lindqvist; [2016]
    Nyckelord :hardware in the loop; turbinregulator; PLC; vattenkraft; LabView;

    Sammanfattning : The function of a turbine governor is to maintain the grid frequency close to the nominal value, which in the Nordic grid is 50 Hz. This thesis uses a standard turbine governor from Vattenfall AB, which is implemented with a PLC. LÄS MER

  4. 3. Förluster av nedströmsvandrande fisk vid turbinpassage : En fallstudie för att främja den småskaliga, såsom storskaliga vattenkraften

    Master-uppsats, KTH/Kraft- och värmeteknologi

    Författare :Johanna Stålered; [2014]
    Nyckelord :Fiskdödlighet; nedströmsvandrande fisk; vattenkraft; turbin;

    Sammanfattning : The expansion of the Swedish hydro power has contributed positively to the reduction of the environmental impacts from the fossil fueled power production. In the same time the extensive expansion has been proved to cause negative ecological and local environment impacts of a stream. LÄS MER

  5. 4. Expanding operation ranges using active flow control in Francis turbines

    M1-uppsats, Umeå universitet/Institutionen för tillämpad fysik och elektronik

    Författare :Sebastian Adolfsson; [2014]
    Nyckelord :Hydropower; flow control; rheingans; vortex rope; air injection; water injection; draft tube; pressure surge;

    Sammanfattning : This report contains an investigation of fluid injection techniques used in the purpose of reducing deleterious flow effects occurring in the draft tube of Francis turbines when operating outside nominal load. There is a focus on implement ability at Jämtkrafts hydroelectric power plants and two power plants were investigated, located in series with each other named Lövhöjden and Ålviken. LÄS MER

  7. 5. Validering av vattenkraftmodeller i ARISTO

    Uppsats för yrkesexamina på avancerad nivå, Elektricitetslära

    Författare :Maja Lundbäck; [2013]
    Nyckelord :;

    Sammanfattning : This master thesis was made to validate hydropower models of a turbine governor, Kaplan turbine and a Francis turbine in the power system simulator ARISTO at Svenska Kraftnät. The validation was made in three steps. The first step was to make sure the models was implement correctly in the simulator. LÄS MER