Sökning: "Multi-terminal grid"

Hittade 5 uppsatser innehållade orden Multi-terminal grid.

  1. 1. Protection of HVDC Grids Against Blackouts (Simulation)

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

    Författare :Amal Al-Ammari; Dinah Atchan; [2021]
    Nyckelord :High Voltage Direct Current HVDC ; Voltage derivative dv=dt algorithm; Traveling wave algorithm; PSCAD simulation; Multi-terminal grid; Fault detection; Threshold value; Offshore HVDC; DC breaker; Voltage collapse;

    Sammanfattning : In the search for green energy to combat climatechange, a shift from conventional energy sources such as coal,oil, and nuclear towards Renewable Energy Sources (RES) isneeded. This shift poses a threat to the stability of the powergrids as RES do not contribute with rotating mass in the system. LÄS MER

  3. 2. Operation and Control of HVDC Grids

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

    Författare :Henrik Johansson; Lucas Tunelid; [2020]
    Nyckelord :Droop control; HIL; Modular multilevelconverter MMC ; Multi-terminal HVDC MTDC grid; Powersystems; Voltage source converter VSC modeling;

    Sammanfattning : In order to meet the increasing demand ofenergy in today’s society while at the same time minimizing theenvironmental impact, renewable energy sources will be requiredto be integrated into the existing energy mix. Technologicaladvances in high voltage direct current (HVDC) grids playa crucial role in making this possible. LÄS MER

  4. 3. Testing and analysis of an intelligent electronic device (IED) prototype for MTDC overhead line application

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

    Författare :Ashen Gomes; [2020]
    Nyckelord :;

    Sammanfattning : A key problem faced with the implementation of a multi-terminal direct current (MTDC) grid is fault mitigation. One method extensively researched in mitigating a fault in MTDC is to use protection intelligent electronic devices (IEDs) and fast direct current circuit breakers (DCCBs). LÄS MER

  5. 4. Study of an Isolated and a Non-Isolated Modular DC/DC Converter : In Multi-Terminal HVDC/MVDC grid systems

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

    Författare :Ranjithh Raj Ram Prakash; [2019]
    Nyckelord :High power high voltage DC-DC converter; Isolated non-isolated DC-DC converter; HVDC MVDC interconnection; HVDC HVDC point-to-point link; Modular multilevel converter; Transformer driven MMC; Steady state transient DC fault analysis; High Power DC DC-omvandlare med hög spänning; Isolerad och icke-isolerad DC-DC-omvandlare; HVDC MVDC-anslutning; HVDC HVDC-punkt-till-punkt-länk; Modulär multilevelomvandlare; Transformatorstyrd MMC; Stabilitet DC felanalys;

    Sammanfattning : För sammankoppling av multi-terminala HVDC-system med punkt-till-punkt kopplingar ärDC-DC-omvandlaren den enda möjliga sammankopplingen. Därför genomgår problemenmed spänningsmatchning och likspänningsströmbegränsning i högspännings DC-systemomfattande forskning samt ligger i fokus för denna avhandling. LÄS MER

  7. 5. Integration of regulation in Multi-Terminal Direct Current grids design

    Master-uppsats, KTH/Elkraftteknik

    Författare :Léo Dalmar; [2017]
    Nyckelord :;

    Sammanfattning : The supergrid denotes a transmission grid development option at European scalebased on large power corridors enabling to transport electricity from large productioncenters (such as large oshore wind farms) to large consumption centers.Technico-economic studies show that the development of supergrids could provideoverall benefits in terms of : economic welfare, security of supply and integrationof renewables at European scale. LÄS MER