Advantages in using Kalman phasor estimation in numerical differential protective relaying compared to the Fourier estimation method

Bjarne Søndergaard Bukh, Unnur Stella Gudmundsdottir, Per Balle Holst, Kim Boe Jensen, Louise Carina Jensen, Claus Leth Bak

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    Abstrakt

    This paper demonstrates the results obtained from detailed studies of Kalman phasor estimation used in numerical
    differential protective relaying of a power transformer. The accuracy and expeditiousness of a current estimate in the
    numerical differential protection is critical for correct and not unnecessary activation of the breakers by the protecting relay, and the objective of the study was to utilize the capability of Kalman phasor estimation in a signal model representing the expected current signal from the current transformers of the power transformer. The used signal model included the fundamental frequency, an exponentially decaying current, the 2nd and the 5th harmonic to the fundamental frequency.
    OriginalsprogEngelsk
    TitelProceedings of International Conference on Power System Transients
    Antal sider6
    ForlagIPST
    Publikationsdato2007
    StatusUdgivet - 2007
    BegivenhedInternational Conference on Power System Transients (IPST) 2007 - Lyon, Frankrig
    Varighed: 4 jun. 20077 jun. 2007

    Konference

    KonferenceInternational Conference on Power System Transients (IPST) 2007
    Land/OmrådeFrankrig
    ByLyon
    Periode04/06/200707/06/2007

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