Field experience with return voltage measurements for assessing insulation condition in transformers and its comparison with accelerated aged insulation samples

Saha, T. K., Darveniza, M. and Yao, Z. T. (1999). Field experience with return voltage measurements for assessing insulation condition in transformers and its comparison with accelerated aged insulation samples. In: IEE, Eleventh International Symposium on High-Voltage Engineering. ISH'99, London, (140-143). 23-27 August 1999.


Author Saha, T. K.
Darveniza, M.
Yao, Z. T.
Title of paper Field experience with return voltage measurements for assessing insulation condition in transformers and its comparison with accelerated aged insulation samples
Conference name ISH'99
Conference location London
Conference dates 23-27 August 1999
Proceedings title Eleventh International Symposium on High-Voltage Engineering   Check publisher's open access policy
Place of Publication London, UK
Publisher IEE
Publication Year 1999
Sub-type Fully published paper
ISBN 0852967195
ISSN 0537-9989
Editor IEE
Volume 5
Start page 140
End page 143
Total pages 4
Collection year 1999
Language eng
Abstract/Summary There has been growing interest in the condition assessment of transformer insulation by the return voltage (RV) method. RV measurements have been applied to a number of power and distribution transformers. The RV parameters are found to vary significantly and consistently with the ageing condition of insulation systems. Among RV parameters, a central time constant has been found to be most sensitive to ageing and is independent of rating of transformers. However, the peak maximum return voltage and initial slope are dependent on the geometry of the insulation, and hence it was difficult to compare these for different ratings of transformers. For the same rating transformer, the initial slope was found to be very sensitive to ageing as well. Peak maximum return voltage has been found to increase with rating (perhaps due to the effect of different insulation resistance). The initial slope and central time constant can therefore be used for assessing the condition of aged insulation in power transformers. A good replication of ageing condition was achieved by the ageing experiments in the presence of air.
Subjects E1
660301 Electricity transmission
290901 Electrical Engineering
Q-Index Code E1
Additional Notes Conference Publication No. 467

 
Versions
Version Filter Type
Citation counts: Google Scholar Search Google Scholar
Created: Fri, 06 Jun 2008, 15:32:32 EST