Some factors affecting the diagnosis of latent fault in XLPE cable insulation

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI:10.1109/ELINSL.2002.995890

Chunxi Zhang, Shouguo Sheng, Xiaochun Chi, Jia-xiang Yang

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Abstract

In this paper, some factors affecting the measurement of the characteristics of XLPE insulated cable are investigated. As many techniques have been developed for insulation assessment in the laboratory, it is important to understand some factors in hot-line measurement differing from those in the laboratory. Based on the purpose of using easily in hot-line condition, a model of a latent fault signal measurement system was constructed. In the experiment, the power voltage, the length of cable, and the resistance between metal shield of cable and ground are considered as important factors affecting measurement results. Through some investigations in laboratory, the influences of power voltage, length of cable, ground resistance on the fault signal are clearly shown. According to measurement results, some strategies for diagnosis and evaluation can be used to process the fault signals into standard values-and then the insulation state of cable can be predicted.

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影响交联聚乙烯电缆绝缘潜在故障诊断的几个因素

本文对影响交联聚乙烯绝缘电缆性能测量的一些因素进行了研究。由于已经开发了许多实验室绝缘评估技术，因此了解热线测量与实验室测量不同的一些因素是很重要的。基于便于在热线工况下使用的目的，建立了潜在故障信号测量系统的模型。在实验中，电源电压、电缆长度、电缆金属屏蔽层与地之间的电阻是影响测量结果的重要因素。通过实验室调查，清楚地显示了电源电压、电缆长度、接地电阻对故障信号的影响。根据测量结果，采用相应的诊断和评估策略，将故障信号转化为标准值，从而预测电缆的绝缘状态。

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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Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316)

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