Abstract
| Language | English |
|---|---|
| Title of host publication | 2011 Electrical insulation conference (EIC) |
| Place of Publication | New York |
| Publisher | IEEE |
| Pages | 201-205 |
| Number of pages | 5 |
| ISBN (Print) | 9781457702792 |
| DOIs | |
| Publication status | Published - 2011 |
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Keywords
- sensors
- partial discharge
- transformers
- condition monitoring
- fault location
- UHF
- gas-insulated substations
- detection and location
- power transformers
Cite this
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Experience with UHF partial discharge detection and location in power transformers. / Judd, M. D.
2011 Electrical insulation conference (EIC). New York : IEEE, 2011. p. 201-205.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book
TY - GEN
T1 - Experience with UHF partial discharge detection and location in power transformers
AU - Judd, M. D.
PY - 2011
Y1 - 2011
N2 - Ultra-high frequency (UHF) methods for detecting and locating partial discharges (PD) are well established for gas insulated equipment. This paper provides an overview of their application to power transformers, discussing practicalities, capabilities and challenges. In recent years, UHF PD detection has proved helpful to manufacturers as a tool for enhancing quality control. The technique can now form a valuable addition to the suite of on-line monitoring technologies available for power transformers. A key aspect discussed in this paper is the installation of sensors, which must have an electromagnetic 'view' into the Faraday cage of the tank. Locating PD sources by time-of-flight methods in transformers requires accurate spatial resolution in three dimensions in the presence of large conducting components inside the tank that often block the line of sight between PD source and sensor. For this reason, instead of an 'empty box' representation, modeling techniques are used to account for the internal structure of the transformer so that observed time differences among PD signals received at different sensors can be interpreted more realistically. The PD location procedure is illustrated by means of practical results, which indicate that PD sources can be located typically to within 0.3 m in a power transformer.
AB - Ultra-high frequency (UHF) methods for detecting and locating partial discharges (PD) are well established for gas insulated equipment. This paper provides an overview of their application to power transformers, discussing practicalities, capabilities and challenges. In recent years, UHF PD detection has proved helpful to manufacturers as a tool for enhancing quality control. The technique can now form a valuable addition to the suite of on-line monitoring technologies available for power transformers. A key aspect discussed in this paper is the installation of sensors, which must have an electromagnetic 'view' into the Faraday cage of the tank. Locating PD sources by time-of-flight methods in transformers requires accurate spatial resolution in three dimensions in the presence of large conducting components inside the tank that often block the line of sight between PD source and sensor. For this reason, instead of an 'empty box' representation, modeling techniques are used to account for the internal structure of the transformer so that observed time differences among PD signals received at different sensors can be interpreted more realistically. The PD location procedure is illustrated by means of practical results, which indicate that PD sources can be located typically to within 0.3 m in a power transformer.
KW - sensors
KW - partial discharge
KW - transformers
KW - condition monitoring
KW - fault location
KW - UHF
KW - gas-insulated substations
KW - detection and location
KW - power transformers
UR - http://www.scopus.com/inward/record.url?scp=80052724797&partnerID=8YFLogxK
U2 - 10.1109/EIC.2011.5996146
DO - 10.1109/EIC.2011.5996146
M3 - Conference contribution book
SN - 9781457702792
SP - 201
EP - 205
BT - 2011 Electrical insulation conference (EIC)
PB - IEEE
CY - New York
ER -