| Pattern Analysis on DC Breakdown Phenomenon of Polyethylene Films |
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| 作者姓名： | 杜伯学 刘勇 刘弘景 |
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| 作者单位： | School of Electrical Engineering and Automation Tianjin University，School of Electrical Engineering and Automation Tianjin University，School of Electrical Engineering and Automation Tianjin University，Tianjin 300072 China Tianjin 300072 China Tianjin 300072 China |
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| 基金项目： | Supported by the Doctoral Foundation from Education Ministry of China (No. 20040056037). |
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| 摘 要： | Low-density polyethylene ( LDPE) film andhigh-density polyethylene (HDPE) film are two typi-cal polyethylene films and widely used in electricaland electronic equipment, such as covering and corein ultra-high frequency cables1—3]. It is well knownthat the unexpected defects in insulating polyethylenefilms under a high voltage will lead to the occurrenceof insulation degradation and act as the beginning ofinsulation breakdown. The insulation degradation ad-vances not only with the accumula…
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| 关 键 词： | 聚乙烯 薄膜 绝缘击穿 图样分析 LDPE |
| 收稿时间： | 2006-04-14 |
Pattern Analysis on DC Breakdown Phenomenon of Polyethylene Films |
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| DU Boxue,LIU Yong,LIU Hongjing.Pattern Analysis on DC Breakdown Phenomenon of Polyethylene Films[J].Transactions of Tianjin University,2006,12(5):325-329. |
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| Authors: | DU Boxue LIU Yong LIU Hongjing |
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| Abstract: | Pattern analysis method was used to study DC breakdown characteristics of low-density polyethylene (LDPE) film and high-density polyethylene (HDPE) film, with particular attention paid to the breakdown phenomenon identification. The breakdown pattern (BP) was recorded by a monocular-video-zoom microscope. The records showed that the effective area of BP was almost identical to the types of electrodes. The effective area was calculated by a mathematical integral method. The diameter was obtained by a mathematical statistic method. The study revealed that the DC breakdown voltage of LDPE was lower than that of HDPE. The diameter and effective area of LDPE were smaller than those of HDPE, but it is opposite for the condition of the needle-plane electrode with plane electrode grounded. As for the needle-plane electrode, the diameter and effective area with the films near the needle electrode were smaller than those near the plane electrode, and those in the middle of air gap were between them. As for the sphere-plane electrode, the diameter and effective area with the films near the plane electrode were smaller than those near the sphere electrode, and those in the middle of air gap were between them. |
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| Keywords: | polyethylene thin films insulation breakdown pattern analysis |
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