NDLI: UHF PD Online Monitoring of Huge-Size Transformers and Data Analysis

Content Provider	IEEE Xplore Digital Library
Author	Wan Yuan Gong Chuangli Wei Zhipeng Deng Pengcheng
Copyright Year	2011
Abstract	It is widely accepted that failures due to insulation defects are often preceded by some form of PD activities in HV equipments. This paper describes practical application of the UHF PD detection on a new oil-immersed power transformer. An internal UHF sensor was designed and installed to the transformer for insulation condition assessment. As the frequency band of this UHF sensor was 300~1500MHz, envelope detection technique was used to extract UHF signals excited from PD sources inside the transformer. The results of MATLAB simulation and experimental measurements have shown that UHF PD signals can be effectively extracted by this method. Using the monitoring system established in this paper, typical UHF PD patterns were recorded during PD acceptance test, which reveal that UHF PD measurements can detect small level of discharges with good sensitivity. Finally, online monitoring data including strong external disturbances such as lightning strikes, switching operation pulses was studied.
Starting Page	2375
Ending Page	2378
File Size	527018
Page Count	4
File Format	PDF
ISBN	9781612842783
DOI	10.1109/CDCIEM.2011.338
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-02-19
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Partial discharges UHF antenna Envelope detection Partial discharge Discharges Switches Oil insulation Online monitoring Monitoring Power transformer insulation Rtransformer
Content Type	Text
Resource Type	Article

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