Short-Circuit Point Estimation Method Using Abnormal Detection Line of Distribution Line

Yasuhiro Kodama*, Yasuhiro Hayashi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Short-circuit accidents hinder the supply of electric power in distribution lines. If a short-circuit occurs, the power supply is interrupted and can be resumed only after the short-circuit point is repaired. Identifying the short-circuit point is time consuming because it is necessary to confirm whether the overcurrent passage indicator is operating and visually confirm the short-circuit point. Therefore, we propose a method of installing an abnormal detection line under the high-voltage line and identifying the short-circuit point based on the current ratio before and after the short-circuit flowing to the current-measuring devices installed at both ends of the abnormal detection line. Because the current flowing in a high-voltage distribution line at the time of the short-circuit depends on the short-circuit resistance value, the range of application of the short-circuit resistance value is also discussed. We show that the method using abnormal-detection lines can be applied to estimate the high-resistance ground faults and disconnection points, and the ability to estimate short-circuit points leads to the efficient use of the method using abnormal detection lines.

Original languageEnglish
Pages (from-to)1452-1459
Number of pages8
JournalIEEJ Transactions on Electrical and Electronic Engineering
Volume17
Issue number10
DOIs
Publication statusAccepted/In press - 2022

Keywords

  • abnormal detection line
  • distribution line
  • short-circuit point estimation
  • short-circuit resistance value

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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