Details
| Original language | English |
|---|---|
| Article number | 4591233 |
| Pages (from-to) | 1100-1111 |
| Number of pages | 12 |
| Journal | IEEE Transactions on Dielectrics and Electrical Insulation |
| Volume | 15 |
| Issue number | 4 |
| Publication status | Published - Aug 2008 |
Abstract
For reliable operation of power transformers, the condition of the insulation system is essential. This paper reports on a detailed study of the effect of ageing, temperature and moisture on frequency and time domain spectroscopic measurements carried out on oil-impregnated pressboard samples as well as on a distribution transformer under controlled laboratory conditions. Because field measurements are generally performed after de-energizing the transformer, extreme care is required in interpreting the results due to inherent temperature instabilities. To avoid large thermal variations that may affect the results, a customized adiabatic room was built around the transformer for measurements above the ambient. Capacitance ratio and direct current conductivity deduced from the spectroscopic measurements, helped to interpret the data. Because, low frequency measurements techniques are time consuming, alternative to a transfer of time domain data into frequency domain data was investigated.
Keywords
- Aging, Conductivity, Dielectric spectroscopy, Frequency domain, Moisture, Oil-paper insulation, Temperature, Time domain
ASJC Scopus subject areas
- Engineering(all)
- Electrical and Electronic Engineering
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In: IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 15, No. 4, 4591233, 08.2008, p. 1100-1111.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Dielectric spectroscopic measurements on transformer oil-paper insulation under controlled laboratory conditions
AU - Setayeshmehr, A.
AU - Fofana, I.
AU - Eichler, C.
AU - Akbari, A.
AU - Borsi, H.
AU - Gockenbach, E.
N1 - Funding information: The authors would like to thank Programma Electronic AB for letting them to use the IDA 200 Insulation Diagnostic System for the frequency domain measurements. Their thanks are also extended to the Alexander von Humboldt foundation for providing financial support to Prof. Fofana during his research stay in Germany (June 15th to August 15th 2006).
PY - 2008/8
Y1 - 2008/8
N2 - For reliable operation of power transformers, the condition of the insulation system is essential. This paper reports on a detailed study of the effect of ageing, temperature and moisture on frequency and time domain spectroscopic measurements carried out on oil-impregnated pressboard samples as well as on a distribution transformer under controlled laboratory conditions. Because field measurements are generally performed after de-energizing the transformer, extreme care is required in interpreting the results due to inherent temperature instabilities. To avoid large thermal variations that may affect the results, a customized adiabatic room was built around the transformer for measurements above the ambient. Capacitance ratio and direct current conductivity deduced from the spectroscopic measurements, helped to interpret the data. Because, low frequency measurements techniques are time consuming, alternative to a transfer of time domain data into frequency domain data was investigated.
AB - For reliable operation of power transformers, the condition of the insulation system is essential. This paper reports on a detailed study of the effect of ageing, temperature and moisture on frequency and time domain spectroscopic measurements carried out on oil-impregnated pressboard samples as well as on a distribution transformer under controlled laboratory conditions. Because field measurements are generally performed after de-energizing the transformer, extreme care is required in interpreting the results due to inherent temperature instabilities. To avoid large thermal variations that may affect the results, a customized adiabatic room was built around the transformer for measurements above the ambient. Capacitance ratio and direct current conductivity deduced from the spectroscopic measurements, helped to interpret the data. Because, low frequency measurements techniques are time consuming, alternative to a transfer of time domain data into frequency domain data was investigated.
KW - Aging
KW - Conductivity
KW - Dielectric spectroscopy
KW - Frequency domain
KW - Moisture
KW - Oil-paper insulation
KW - Temperature
KW - Time domain
UR - http://www.scopus.com/inward/record.url?scp=49449107140&partnerID=8YFLogxK
U2 - 10.1109/TDEI.2008.4591233
DO - 10.1109/TDEI.2008.4591233
M3 - Article
AN - SCOPUS:49449107140
VL - 15
SP - 1100
EP - 1111
JO - IEEE Transactions on Dielectrics and Electrical Insulation
JF - IEEE Transactions on Dielectrics and Electrical Insulation
SN - 1070-9878
IS - 4
M1 - 4591233
ER -