• Libraries
    • Log in to:
    View Item 
    •   MSpace Home
    • Faculty of Graduate Studies (Electronic Theses and Practica)
    • FGS - Electronic Theses and Practica
    • View Item
    •   MSpace Home
    • Faculty of Graduate Studies (Electronic Theses and Practica)
    • FGS - Electronic Theses and Practica
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Investigation of protection problems due to geomagnetically induced currents

    Thumbnail
    View/Open
    nq23614.pdf (6.658Mb)
    Date
    1996-10-01
    Author
    Jayasinghe, Rohitha Prashad
    Metadata
    Show full item record
    Abstract
    Geomagnetically Induced Currents (GIC), flowing in power systems during Solar Magnetic Disturbances (SMD), can cause severe offset saturation of power system transformers. Continuous saturation of transformers can result in transformer overheating, and cause harmon c currents to be injected into the system. Relay and protection systems are affected by harmonic currents passing through the system. A considerable amount of study has been done using analog and/or digital simulations of transformer half-cycle saturation to predict the transformer response to DC excitation. These methods used simplified transformer core models to represent the excitation-flux relationships. This thesis includes the development of an accurate transformer core model. The accuracy of the model is validated by comparing the recorded waveforms during GIC events with the simulated waveforms using the model. Then the model is used to investigate the other system quantities at different GIC conditions. As well, the performance of several protection schemes under GIC are evaluated. The study is performed using an electromagnetic transients simulation program.
    URI
    http://hdl.handle.net/1993/749
    Collections
    • FGS - Electronic Theses and Practica [25535]

    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
    Theme by 
    Atmire NV
     

     

    Browse

    All of MSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    Login

    Statistics

    View Usage Statistics

    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
    Theme by 
    Atmire NV