Study on the Partial Discharge Characteristics of Internal Void Defects under Special-shaped Wave Voltage

2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2022-10-30 DOI:10.1109/CEIDP55452.2022.9985265

Min Tian, W. Shen, Wen Cao, Changjiang Chen, Ted F. Yang, Yan Du

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Abstract

During the production, manufacture and transportation of cross-linked polyethylene (XLPE) cable, internal void defects may generate inside the insulation, which will cause partial discharge (PD) affecting the safe and stable operation of XLPE cable. Special-shaped wave voltage has some superiorities in PD detection. The PD characteristics of XLPE insulation samples with internal void defects are investigated under the special-shaped wave voltage in this paper. Firstly, XLPE insulation samples with internal void defects were prepared. Secondly, special-shaped wave voltage was designed and output stably. Thirdly, PD test platform was built, and the tests were performed under both power frequency AC voltage and the special-shaped wave voltage. Finally, the PD characteristics of internal void defects under the above two types of voltages were analyzed. From the comparative analysis of the characteristic parameters of PD under the two voltages, it can be seen that the special-shaped wave voltage has more advantages in PD detection. At the same time, experiments shyow that the special distribution law of the discharge characteristic parameter under the decreasing special-shaped wave voltage is closely related to the accumulation of free electrons and the formation of electron collapses.

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异型波电压下内部空穴缺陷局部放电特性的研究

交联聚乙烯(XLPE)电缆在生产、制造和运输过程中，绝缘内部会产生内部空隙缺陷，从而产生局部放电，影响交联聚乙烯电缆的安全稳定运行。异形波电压在局部放电检测中具有一定的优势。本文研究了异形波电压作用下带有内部空洞缺陷的XLPE绝缘试样的局部放电特性。首先，制备了含有内部空洞缺陷的交联聚乙烯绝缘材料。其次，设计异形波电压并稳定输出;第三，搭建了PD测试平台，在工频交流电压和异形波电压下进行了PD测试。最后，分析了两种电压下内部空穴缺陷的局部放电特性。从两种电压下局部放电特征参数的对比分析可以看出，异形波电压在局部放电检测中更具优势。同时，实验表明，异形波电压减小时放电特性参数的特殊分布规律与自由电子的积累和电子坍塌的形成密切相关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

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