A comprehensive weight‐based severity evaluation method of voltage sag in distribution networks

Xiaohan Guo, Yong Li*, Shaoyang Wang, Yijia Cao, Mingmin Zhang, Yicheng Zhou, Nakanishi Yosuke

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

With the increasing use of sensitive loads in frequency converters and in relays in distribution networks, voltage sag has become a major power quality issue that urgently needs to be solved. For the purpose of improving the understanding of voltage sag severity in distribution net-works, a comprehensive weight‐based severity evaluation method of voltage sag is presented in this paper. First, a multi‐side index system that takes into account the combined influence of the source, network, and the load is established. A comprehensive weight method, which combines the improved analytic hierarchy process (IAHP) and the entropy method, is then adopted to determine the index weight. The weight of each index and the degree of superiority are linearly weighted to obtain the severity of voltage sag at different observation points. Finally, the effectiveness of the proposed method is verified using a distribution network model established in DIgSILENT Power‐ Factory (15.1.7, German).

Original languageEnglish
Article number6434
JournalEnergies
Volume14
Issue number19
DOIs
Publication statusPublished - 2021 Oct 1

Keywords

  • Analytic hierarchy process
  • Entropy method
  • Index evaluation
  • Severity evaluation
  • Voltage sag

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Energy (miscellaneous)
  • Control and Optimization
  • Electrical and Electronic Engineering

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