Improved Voltage Stability Boundary Monitoring by Accounting for Variations in Thevenin Voltage Magnitude.

Bahtiyar Can Karatas, Hjörtur Jóhannsson, Arne Hejde Nielsen

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    Abstract

    This paper identifies weakness of existing method for voltage stability assessment and proposes new approach for determining point of maximum deliverable power to a given load that accounts for the variations in the Thevenin voltage magnitude. The approach uses Thevenin equivalents seen from nodes of constant voltage magnitude and load nodes in order to determine a distance to instability. A simple five-bus system together with IEEE 14 bus system were used in order to perform dynamic simulation in PSS/E. The simulation data were used to create synthetic Phasor Measurement Unit (PMU) snapshots, which served as input to the proposed approach. The new approach is demonstrated on the two test systems, where improved accuracy in determining the point of maximum deliverable power is demonstrated. The results show that the point of maximum deliverable power to the load occurs well before the Thevenin impedance matching criteria.
    Original languageEnglish
    Title of host publicationProceedings of 8th IEEE PES Innovative Smart Grid Technologies Conference
    Number of pages6
    PublisherIEEE
    Publication date2018
    ISBN (Print)978-1-5386-4505-5
    DOIs
    Publication statusPublished - 2018
    Event2018 IEEE PES Innovative Smart Grid Technologies Conference Europe - Sarajevo, Bosnia and Herzegovina
    Duration: 21 Oct 201825 Oct 2018
    Conference number: 8
    https://ieeexplore.ieee.org/xpl/conhome/8540978/proceeding

    Conference

    Conference2018 IEEE PES Innovative Smart Grid Technologies Conference Europe
    Number8
    Country/TerritoryBosnia and Herzegovina
    CitySarajevo
    Period21/10/201825/10/2018
    Internet address

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