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

1 Citation (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

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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