The excitation of UHF signals by partial discharges in GIS

被引：274
作者：
Judd, MD
Farish, O
Hampton, BF
机构：
[1] Center for Electrical Power Engineering, University of Strathclyde, Glasgow
来源：
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION | 1996年 / 3卷 / 02期
基金：
英国工程与自然科学研究理事会;
关键词：
D O I：
10.1109/94.486773
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：
The fundamental theory of the UHF method for detecting partial discharge (PD) in gas insulated substations (GIS) is presented. The effects of position, size, current amplitude and pulse shape of the PD source on the UHF signal tan be predicted using this theory. Excitation of propagating electromagnetic waves by a PD current pulse within the coaxial waveguides formed by GIS components is explained by making use of dyadic Green's functions for the electric fields of propagating modes. Experiments with a coaxial test chamber are used to verify the theoretical predictions, and comparisons are made between measured and simulated UHF signals. Some implications for the UHF measurement of PD are discussed, together with positioning and sensitivity requirements for UHF couplers. A scheme is proposed for standardizing PD measurements made using the UHF technique.
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页码：213 / 228
页数：16
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