Time delay estimation for UHF signals in PD location of transformers

被引：0
|
作者：
Yang, L [1 ]
Judd, MD [1 ]
Bennoch, CJ [1 ]
机构：
[1] Univ Strathclyde, Inst Energy & Environm, Glasgow, Lanark, Scotland
来源：
2004 ANNUAL REPORT CONFERENCE ON ELECTRICAL INSULATION AND DIELECTRIC PHENOMENA | 2004年
关键词：
D O I：
暂无
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：
Time delay estimation (TDE) is essential for PD location using the UHF technique. However, noise and effects of multi-path propagation are two main problems affecting the accuracy of the estimate. Comparing two methods, which are based on cumulative energy curve and power curve respectively, a cross correlation based method is employed to achieve the estimation. A high-pass filter is applied to the UHF signal to eliminate operating noises. The phase characteristic of the filter is designed to be linear for making the time delay a constant in terms of frequency. A window in the time domain is selected to reduce the effect of multi-path propagation.
引用
收藏
页码：414 / 417
页数：4
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