Sökning: "High Voltage Direct Current HVDC"

Visar resultat 11 - 15 av 39 uppsatser innehållade orden High Voltage Direct Current HVDC.

  1. 11. The role of location of low inertia in power systems

    Master-uppsats, Uppsala universitet/Institutionen för elektroteknik

    Författare :Bashar Alahmad; [2021]
    Nyckelord :Low inertia; Frequency stability; Rotor-angle stability; Nordic 32; Kundur; PowerFactory; Small-signal stability; Inter-area oscillation; Rate of Change of Frequency.;

    Sammanfattning : The plans to reduce the energy-related greenhouse gas emissions stimulate the deployment of electronically interfaced renewable resources. The increased penetration of such intermittent sources together with phasing conventional power plants out and the installation of High Voltage Direct Current (HVDC) links for long-distance more efficient transmission, reduces the stored inertia in any electrical grid. LÄS MER

  3. 12. HVDC transformer core resonance calculation

    Master-uppsats, KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

    Författare :Axel Thorstrand; [2021]
    Nyckelord :HVDC; High Voltage Direct Current; Transformer core; Natural frequencies; Energy method-based equation; HVDC; Högspänning likström; Transformatorkärna; Naturliga frekvenser; Energimetod;

    Sammanfattning : Transformers emit a characteristic humming noise due to magnetostriction which is the continuous change in dimensions during magnetization. The noise is amplified if the induced frequencies match the core’s natural frequencies, consequently avoiding geometries that create resonance is critical in order to fulfill customer sound level requirements. LÄS MER

  4. 13. 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

  5. 14. 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

  7. 15. Dynamic Virtual Admittance Control Hardware-In-The-Loop Real-Time Simulation

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

    Författare :Damien Gadou-Sanyal; [2020]
    Nyckelord :;

    Sammanfattning : To enhance the transient stability and the power oscillation damping of the powergrid, supplementary controllers can be applied to the embedded point-to-point High-Voltage Direct Current (HVDC) links. The work presented in this report aimed tovalidate the Dynamic Virtual Admittance Control (DVAC) designed in SuperGridInstitute, in Software- and Hardware-In-The-Loop (SIL and HIL) simulations. LÄS MER