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 language | English |
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| Pages | 932-935 |
| Number of pages | 4 |
| Publication status | Published - 2003 |
| Event | Proceedings of the 7th International Conference on Properties and Applications of Dielectric Materials - Nagoya, Japan Duration: 2003 Jun 1 → 2003 Jun 5 |
Conference
| Conference | Proceedings of the 7th International Conference on Properties and Applications of Dielectric Materials |
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| Country/Territory | Japan |
| City | Nagoya |
| Period | 03/6/1 → 03/6/5 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Materials Chemistry