多重缺陷交联聚乙烯电缆绝缘局部放电特性研究

I. V. Komarov, D. Polyakov, K. I. Nikitin
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引用次数: 0

摘要

本文模拟了带有一个缺陷和几个缺陷的电缆的电场强度图。模拟表明,与一个缺陷相比,几个紧密间隔缺陷的存在并不会导致电场强度的增加。在实验研究的基础上,分析了缺陷数对局部放电各参数的影响。在交联聚乙烯绝缘电缆终端区域会产生人为缺陷。测量了局部放电的以下参数:视电荷的大小、局部放电的功率(强度)、相分辨局部放电(PRPD)模式、局部放电信号的形状。分析表明,尽管缺陷分布在电缆的不同截面上,但缺陷数量的增加并不影响局部放电的特性。因此,在电缆局部放电测量期间,很难对缺陷进行量化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Partial discharges characteristics study in XLPE cable insulation with multiple defects
The paper simulates the electric field intensity picture in the cable with one and several defects. Modeling has shown that the presence of several closely spaced defects does not lead to an increase in the electric field intensity in comparison with one defect. On the basis of experimental studies, an analysis of defects' number influence on various parameters of partial discharges (PD) is performed. Artificial defects are created in the area of the XLPE-insulated cable termination. The following parameters of PD are measured: the magnitude of the apparent charge, the power (intensity) of partial discharges, the phase-resolved partial discharge (PRPD) patterns, the shape of PD signals. The analysis shows an increase in the number of defects does not affect the characteristics of partial discharges, despite the fact the defects are located in different sections of the cable with distributed parameters. Thus, it can be difficult to quantify defects during cable partial discharge measurements.
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