PD detection in extruded power cables: An approximate propagation model

被引：40

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

页码：832 / 840

页数：9

共 20 条

[1] Semiconducting layer impedance and its effect on cable wave-propagation and transient characteristics [J].