• Login
    View Item 
    •   SMARTech Home
    • Georgia Tech Theses and Dissertations
    • Georgia Tech Theses and Dissertations
    • View Item
    •   SMARTech Home
    • Georgia Tech Theses and Dissertations
    • Georgia Tech Theses and Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    INSTRUMENTATION CHANNEL ERROR CORRECTION AND ITS EFFECTS ON PROTECTIVE RELAYS

    Thumbnail
    View/Open
    KONG-DISSERTATION-2019.pdf (5.087Mb)
    Date
    2019-08-26
    Author
    Kong, Yuan
    Metadata
    Show full item record
    Abstract
    The objective of this research is to propose an on-line instrumentation channel error correction method within merging unit (MU) and to investigate its effects on protective relays. The physically-based high fidelity models of entire instrumentation channel are developed, which consist of the instrument transformer, the instrumentation cable and the burden resistor. A dynamic state estimation algorithm is constructed to estimate the primary values on a sample by sample basis. The introduction of MU enables that each instrumentation channel of a MU can be designed to provide corrected primary values. Therefore, the proposed error correction method can be an integral part of MU so hat MU reports directly primary values that have been corrected, which is applicable in real-time protective relays. An alternative method to validate the estimated samples is presented via substation level dynamic state estimation using legacy or estimated measurement samples, respectively. To evaluate the effects of errors on protection relay actions, the performance of three typical protection schemes are presented using estimated measurement samples and legacy measurement samples, respectively. The results show that when large instrumentation channel errors introduced by current transformer (CT) saturation, using the legacy measurement samples may lead to dependability problem for distance relay and security problem for current differential relay and setting-less relay. However, the relay performance (dependability and security) can be greatly improved and the mis-operations can be avoided using the estimated measurement samples.
    URI
    http://hdl.handle.net/1853/64025
    Collections
    • Georgia Tech Theses and Dissertations [23877]
    • School of Electrical and Computer Engineering Theses and Dissertations [3381]

    Browse

    All of SMARTechCommunities & CollectionsDatesAuthorsTitlesSubjectsTypesThis CollectionDatesAuthorsTitlesSubjectsTypes

    My SMARTech

    Login

    Statistics

    View Usage StatisticsView Google Analytics Statistics
    facebook instagram twitter youtube
    • My Account
    • Contact us
    • Directory
    • Campus Map
    • Support/Give
    • Library Accessibility
      • About SMARTech
      • SMARTech Terms of Use
    Georgia Tech Library266 4th Street NW, Atlanta, GA 30332
    404.894.4500
    • Emergency Information
    • Legal and Privacy Information
    • Human Trafficking Notice
    • Accessibility
    • Accountability
    • Accreditation
    • Employment
    © 2020 Georgia Institute of Technology