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Showing result 1 - 5 of 6 essays matching the above criteria.

  1. 1. Line Distance Protection in Power Grids with Variable Renewable Energy Sources : An Investigation on Time Domain Distance Protection via Parameter Estimation

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Ludvig Ringaby; [2023]
    Keywords : Distance protection; Power system protection; Time domain distance protection; Differential Equation Algorithm; Variable renewable energy; IBR; Distansskydd; Skyddssystem i elkraftsystem; Tidsdomän distansskydd; Differentialekvationsalgoritm; Variabel förnybar energi;

    Abstract : Variable renewable energy sources typically connect to the power grid through power electronic interfaces. Increased use of such sources can cause issues for conventional distance protection. READ MORE

  3. 2. Wide-Angle Radome Design for Low-Cost Additive Manufacturing

    University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

    Author : Martin Fajerberg; Mattias Nylander; [2022]
    Keywords : Radar; Radome; A-Sandwich; B-Sandwich; Multilayer; Polarization; Angle of Incidence; Finite Element Method; Differential Evolution Optimization; Transmission Line Theory; Honeycomb; Additive Manufacturing; Electromagnetic Theory; Technology and Engineering;

    Abstract : The radome, a portmanteau of the words radar and dome, is a protective dielectric cover to protect a radar from its surrounding environment. The surrounding environment can be rain, wind, sand, dust and whatever else that might harm the radar. READ MORE

  4. 3. Transmission line protection performance in presence of power electronic-interfaced devices : Impact and needed countermeasures in the Swedish transmission system

    University essay from Uppsala universitet/Elektricitetslära

    Author : Hanna Olofsson; [2021]
    Keywords : ;

    Abstract : The penetration level of power electronic-interfaced devices (PEID:s) in power systems isincreasing, including wind- and solar power, HVDC and FACTS devices. Fault current injectedby PEID:s is lower in magnitude, may lack or contain a reduced negative sequence componentand can have a wide range of phase angles, as opposed to fault current supplied bysynchronous generators (SG:s). READ MORE

  5. 4. Time Synchronization for Ethernet Communication based Line Differential Protection

    University essay from KTH/Elkraftteknik

    Author : Surya Seetharaman; [2017]
    Keywords : ;

    Abstract : Most of the industrial manufactures and designers of Power Substation Automation ProtectionControl products are under pressure regarding the existing communication architecture ofthe Line Dierential Protection Application. Currently the widely used technologies includeSONET/SDH which are circuit switched networks, that are no longer predominant. READ MORE

  6. 5. The Impacts of UHV AC Transmission Lines on Traditional Line Differential Protection Functions

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : MD Zakaria Habib; [2016]
    Keywords : UHV lines phenomenon; Line differential protection; Capacitive charging current compensation;

    Abstract : UHV transmission lines have several advantages when it comes to transferring of bulk amount ofpower in long distances. Although the technology is available from 1980’s, the number of UHVtransmission lines around the world has been increased in the beginning of this century in orderto supply the high demand of electricity. READ MORE