A computationally efficient method for bounding impacts of multiple uncertain parameters in dynamic load models

Jae Kyeong Kim, Jin Ma, Kai Sun, Jaegul Lee, Jeonghoon Shin, Yonghak Kim, Kyeon Hur

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Abstract

This paper develops a computationally efficient method to bound the impact of multiple uncertain parameters in a dynamic load model. Load model trajectory sensitivity is first conducted on regional dynamics only (e.g., a large industrial load bus and its model for adequately representing the bus voltage dynamics) to identify critical and correlated load parameters. Systemwide trajectory sensitivity on the entire power system model is then evaluated for this reduced set of parameters, and finally, the impact of multiple uncertain parameters on the representation of power system dynamics is bounded. To reinforce this reasoning, we elaborate on the conceptual meaning of the load model trajectory sensitivity, its implication, and its applicability to the entire power grid analysis. This research also develops a fluctuation index of trajectory sensitivity to effectively rank and select the model parameters based on the impact of their perturbations on the system's dynamic performance. Case studies for the Korean power system demonstrate the validity and efficacy of the developed methods for adequately bounding the uncertainty impacts with reference to the comprehensive time-domain dynamic simulation approach.

Original languageEnglish
Article number8519330
Pages (from-to)897-907
Number of pages11
JournalIEEE Transactions on Power Systems
Volume34
Issue number2
DOIs
Publication statusPublished - 2019 Mar

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All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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