PD detection in extruded power cables: An approximate propagation model

被引：37
|
作者：
Tozzi, M. [1 ]
Cavallini, A. [1 ]
Montanari, G. C. [1 ]
Burbui, G. L. Giuliattini [1 ]
机构：
[1] Univ Bologna, DIE LIMAT, I-40136 Bologna, Italy
来源：
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION | 2008年 / 15卷 / 03期
关键词：
power cables; PD detection; PD location; ultra wide bandwidth; cable length; phase velocity;
D O I：
10.1109/TDEI.2008.4543121
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In order to improve partial discharge (PD) detection and location in extruded power cables, Ultra-Wide Bandwidth detectors (UWB) can be preferred to wide- and narrow-band systems. As UWB systems aim to get the broadest frequency content in PD pulses, it is important to evaluate the frequency attenuation as a function of distance propagated of the cable under test, trying to achieve optimum signal-to-noise ratio (SNR) and large detection sensitivity. Some conventional techniques able to calculate attenuation and dispersion of PD pulses are considered and a fast approximate model is developed in this paper, trying to provide a simple tool to estimate the maximum PD detection length in polymeric cable, in relation to bandwidth measurement system and required sensitivity.
引用
收藏
页码：832 / 840
页数：9
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