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Proceedings Paper

Studies on the propagation of an impulse breakdown across the surface of artificial acid rainwater by high-speed Schlieren method
Author(s): Yoshitaka Nakao; Kouamenan Aska Juste; Satoshi Takeda; Hidenori Itoh; Takeshi Sakaguchi; Yosuke Sakai; Hiroaki Tagashira
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Paper Abstract

Rain water polluted with natural and industrial contaminants, more commonly known as acid rain, has been used as an electrolyte to account for its effect on the flashover phenomenon across high voltage outdoor insulators. Optical and electrical techniques using high speed Schlieren photography and current measurement with LED were employed. The propagation of an impulse breakdown was then studied by varying the voltage waveforms. Experiments were also conducted with artificial acid rainwater of low pH value to determine the factor of safety over the actual rainwater characteristics. It was found in the present conditions, that given the same conductivity (sigma) neither the dissolved components nor the pH value of the rainwater influence significantly the discharge growth, while a substantial decrease of the propagation speed was measured with the increase of the front duration of the applied voltage.

Paper Details

Date Published: 30 May 1995
PDF: 12 pages
Proc. SPIE 2513, 21st International Congress on: High-Speed Photography and Photonics, (30 May 1995); doi: 10.1117/12.209622
Show Author Affiliations
Yoshitaka Nakao, Muroran Institute of Technology (Japan)
Kouamenan Aska Juste, Muroran Institute of Technology (Japan)
Satoshi Takeda, Muroran Institute of Technology (Japan)
Hidenori Itoh, Muroran Institute of Technology (Japan)
Takeshi Sakaguchi, Muroran Institute of Technology (Japan)
Yosuke Sakai, Hokkaido Univ. (Japan)
Hiroaki Tagashira, Hokkaido Univ. (Japan)


Published in SPIE Proceedings Vol. 2513:
21st International Congress on: High-Speed Photography and Photonics
Ung Kim; Joon-Sung Chang; Seung-Han Park, Editor(s)

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