Role of the number of consecutive voltage zero-crossings on the water tree growth in polyethylene

D. Kaneko, T. Maeda, T. Ito, Y. Ohki, T. Konishi, Y. Nakamichi, M. Okashita

Research output: Contribution to conferencePaperpeer-review

1 Citation (Scopus)

Abstract

With the progress in power electronics, ac voltages with various harmonic components are often applied to insulating materials of power apparatus. Water treeing is the most-observed degradation pattern in polyethylene-insulated power cables, and much work has been done. Nevertheless little is known about their dielectric properties under above-mentioned particular ac voltages. In this paper, the authors examine the influence of superposition of a low-frequency ac voltage (0.1 to 5 Hz) and a high-frequency 2-kHz ac voltage on the growth of water trees in polyethylene. It has become clear that the number of consecutive voltage zero-crossings in the instant of the polarity reversal of the low-frequency voltage plays an important role in the length and shape of water trees.

Original languageEnglish
Pages932-935
Number of pages4
Publication statusPublished - 2003
EventProceedings of the 7th International Conference on Properties and Applications of Dielectric Materials - Nagoya, Japan
Duration: 2003 Jun 12003 Jun 5

Conference

ConferenceProceedings of the 7th International Conference on Properties and Applications of Dielectric Materials
CountryJapan
CityNagoya
Period03/6/103/6/5

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Materials Chemistry

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