Statistical analysis of lightning surges on distribution lines based on the observation

Teru Miyazaki, Shigemitsu Okabe, Kiyoshi Aiba, Takao Hirai

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Probability distribution of surge discharging current of arresters provided a basis for conventional theory of grounding systems. In order to rationalize the grounding systems, it is necessary to grasp the statistical data of lightning surges on distribution lines caused by direct lightning strokes and indirect lightning strokes. Lightning phenomena on TEPCO's distribution lines had been continuously observed for the rationalization of lightning protection design of distribution lines. The observation had been carried out with still cameras and monitoring sensors of lightning surges. This makes it possible to discover new interesting facts that can be useful for rationalization of lightning protection design of distribution lines. Cumulative frequency distribution of conventional data is close to that of ZnO discharging current in the case of direct strokes and indirect strokes through TEPCO's observation. Moreover, to verify the cumulative current distribution in concrete poles, the authors have compared the cumulative distribution of current through ground lines with that of current through ground lines and concrete poles. The results show that the distribution of current through ground lines and concrete poles is larger than that of current through only ground lines for high currents exceeding 1 kA. This fact suggests that lightning surge current flows not only in ground lines but also in concrete poles.

Original languageEnglish
Pages (from-to)36-44
Number of pages9
JournalElectrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)
Volume165
Issue number2
DOIs
Publication statusPublished - 2008 Nov 15

Keywords

  • Arrester
  • Cumulative frequency
  • Direct stroke
  • Distribution line
  • Indirect stroke
  • Lightning
  • Surge

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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