Adaptive underfrequency load shedding based on the magnitude of the disturbance estimation

Vladimir V. Terzija

    Research output: Contribution to journalArticlepeer-review

    Abstract

    In this paper, a new approach to adaptive underfrequency load shedding (UFLS), a procedure for protecting electric power systems from dynamic instability and frequency collapse, is presented. It consists of two main stages. In the first stage, the frequency and the rate of frequency change are estimated by the nonrecursive Newton-type algorithm. By using the simplest expression of the generator swing equation, in the second algorithm stage, the magnitude of the disturbance is determined. The UFLS plan is adapted to the magnitude estimated, obtaining in this way a more efficient system operation during emergency conditions. Results of procedure testing are demonstrated through the dynamic simulations by using: 1) a simple three-machine test system and 2) a ten-machine New England system. © 2006 IEEE.
    Original languageEnglish
    Pages (from-to)1260-1266
    Number of pages6
    JournalIEEE Transactions on Power Systems
    Volume21
    Issue number3
    DOIs
    Publication statusPublished - Aug 2006

    Keywords

    • Adaptive control
    • Dynamic simulation
    • Nonlinear estimation
    • Underfrequency load shedding (UFLS)

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