Fractal analysis of discharge current on polybutylene terephthalate

Proceedings Electrical Insulation Conference and Electrical Manufacturing Expo, 2005. Pub Date : 1900-01-01 DOI:10.1109/EEIC.2005.1566278

B. Du, Gu Liang

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Abstract

In this paper, an artificial atmospheric chamber was set up to investigate the fractal characteristic of discharge currents on polybutylene terephthalate under a reduced pressure. The decompression chamber was made from a glass cylinder with two sheets of acrylic board for the cover and the bottom. The test equipment was placed in the chamber, and the pressure was reduced from 100 kPa to 1 kPa by using a rotary pump. The experiment was carried out on the sample surface by a DC pulse voltage applied between a plate electrode and a needle electrode. The distance between the two electrodes was 6 mm. The frequency of applied pulse voltage ranged from 100 Hz to 250 Hz. The effects of atmospheric pressure and the frequency of applied voltage on the discharge currents have been studied. The fractal theory is used to analyze the discharge characteristics. The fractal dimension of discharge currents increases inversely with decreasing the atmospheric pressure and decreases with increasing the frequency of applied voltage. It is suggested that the fractal dimension can be used to analyze the insulation degradation of polybutylene terephthalate

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聚对苯二甲酸丁二酯放电电流的分形分析

本文建立了一个人工常压室，研究了减压条件下聚对苯二甲酸丁二酯放电电流的分形特征。减压室是由一个玻璃圆筒制成的，盖子和底部是两块亚克力板。试验设备放置在试验室内，利用旋转泵将压力从100kpa降至1kpa。实验是通过在板电极和针电极之间施加直流脉冲电压在样品表面进行的。两个电极之间的距离为6mm。施加脉冲电压的频率范围从100赫兹到250赫兹。研究了大气压和外加电压频率对放电电流的影响。利用分形理论对放电特性进行了分析。放电电流的分形维数随大气压的减小而增大，随外加电压频率的增大而减小。建议分形维数可以用于分析聚对苯二甲酸丁二酯的绝缘降解

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Proceedings Electrical Insulation Conference and Electrical Manufacturing Expo, 2005.

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