Analysis of UHF PD monitoring data by means of normalized cross-correlation

Author

Beltle, M. ; Muller, A. ; Tenbohlen, Stefan

Author_Institution

Inst. of Power Transm. & High Voltage Technol., Univ. of Stuttgart, Stuttgart, Germany

fYear

2012

fDate

23-27 Sept. 2012

Firstpage

103

Lastpage

106

Abstract

The paper presents a long-term monitoring example of an aged generator step-up transformer with several PD sources showing different activity. Monitoring data is recorded by the use of the electromagnetic PD measurement method, also known as the UHF-method. The phase resolved PD patterns of collected UHF measuring data are analyzed using cross-correlation. The method searches for characteristics of a typical pattern called template. PRPD patterns of the entire dataset are evaluated. The result is the time dependent occurrence of a specific pattern, respectively a specific PD source.

Keywords

partial discharges; power transformers; PD sources; PRPD patterns; UHF PD monitoring data analysis; UHF measuring data; UHF-method; aged generator step-up transformer; cross-correlation; data monitoring; electromagnetic PD measurement method; long-term monitoring example; normalized cross-correlation; Correlation; Correlation coefficient; Monitoring; Oil insulation; Partial discharges; Power transformers; UHF measurements; cross-correlation; long-term UHF measurement; monitoring; partical discharge; phase resolved patterns;

fLanguage

English

Publisher

ieee

Conference_Titel

Condition Monitoring and Diagnosis (CMD), 2012 International Conference on

Conference_Location

Bali

Print_ISBN

978-1-4673-1019-2

Type

conf

DOI

10.1109/CMD.2012.6416321

Filename

6416321