Understanding and evaluating systemwide impacts of uncertain parameters in the dynamic load model on short-term voltage stability

Jae Kyeong Kim, Byongjun Lee, Jin Ma, Gregor Verbic, Suchul Nam, Kyeon Hur Nam

    Research output: Contribution to journalArticlepeer-review

    12 Citations (Scopus)

    Abstract

    This paper investigates systemwide short-term voltage stability concerns of power systems due to the multiple parametric uncertainties in the dynamic load model. The impact of regional load model uncertainty can be widespread and may mislead the whole system analysis and subsequent measures, if not properly addressed. This research discloses that the systemwide impact is related to the voltage weak areas through voltage stability modal analysis, and suggests that the impact of uncertain parameters needs to be assessed from a systems perspective, which has rarely been done in the existing practices. We thus present a three-step methodology for evaluating the systemwide uncertainty impacts: Firstly, it screens possible trajectories of all buses. The second step verifies whether the screened trajectories comply with the defined criteria, and determines the necessity of the final step. The final detailed analysis is conducted for those selected scenarios. Comprehensive studies for both the IEEE test and real Korea power systems consistently confirm the observations and demonstrate the efficacy and validity of the proposed method.

    Original languageEnglish
    Article number9209134
    Pages (from-to)2093-2102
    Number of pages10
    JournalIEEE Transactions on Power Systems
    Volume36
    Issue number3
    DOIs
    Publication statusPublished - 2021 May

    Bibliographical note

    Funding Information:
    Manuscript received March 21, 2020; revised August 8, 2020; accepted September 19, 2020. Date of publication September 29, 2020; date of current version April 19, 2021. This work was supported in part by Korea Electric Power Corporation under Grant R17XA05-4, and in part by “Human Resources Program in Energy Technology” of the Korea Institute of Energy Technology Evaluation, and Planning (KETEP) granted financial resource from the Ministry of Trade, Industry, and Energy, Republic of Korea under Grant 20194030202420. Paper no. TPWRS-00442-2020. (Corresponding author: Kyeon Hur.) Jae-Kyeong Kim is with the Advanced Power Grid Research Center, Korea Electrotechnology Research Institute, Uiwang 16029, Korea (e-mail: [email protected],).

    Funding Information:
    This work was supported in part by Korea Electric Power Corporation under Grant R17XA05-4, and in part by "Human Resources Program in Energy Technology" of the Korea Institute of Energy Technology Evaluation, and Planning (KETEP) granted financial resource from the Ministry of Trade, Industry, andEnergy, Republic ofKorea underGrant 20194030202420. Paper no. TPWRS-00442-2020.

    Publisher Copyright:
    © 1969-2012 IEEE.

    Keywords

    • Dynamic load model
    • Modal analysis
    • Parametric uncertainty
    • Short-term voltage stability
    • Trajectory sensitivity

    ASJC Scopus subject areas

    • Energy Engineering and Power Technology
    • Electrical and Electronic Engineering

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