Effect of Rooftop-PV on power transformer insulation and on-load tap changer operation

Martin, D., Saha, T., Krause, O., Cui, Y., McPhail, D., MacArthur, T. and Condon, D. (2015). Effect of Rooftop-PV on power transformer insulation and on-load tap changer operation. In: Proceedings of the 2015 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC). IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC), Brisbane, Australia, (). 15-18 November 2015. doi:10.1109/APPEEC.2015.7380952


Author Martin, D.
Saha, T.
Krause, O.
Cui, Y.
McPhail, D.
MacArthur, T.
Condon, D.
Title of paper Effect of Rooftop-PV on power transformer insulation and on-load tap changer operation
Conference name IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)
Conference location Brisbane, Australia
Conference dates 15-18 November 2015
Convener IEEE
Proceedings title Proceedings of the 2015 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)
Journal name Asia-Pacific Power and Energy Engineering Conference, APPEEC
Place of Publication Piscataway, NJ, United States
Publisher Institute of Electrical and Electronic Engineers (IEEE)
Publication Year 2015
Sub-type Fully published paper
DOI 10.1109/APPEEC.2015.7380952
Open Access Status Not Open Access
ISBN 9781467381321
ISSN 2157-4847
Volume 2016-January
Total pages 6
Language eng
Formatted Abstract/Summary
The uptake of Rooftop PV has been extremely rapid in Australia. An advantage is that it can reduce the load supplied by upstream power transformers. This in theory should make the transformer run cooler, and therefore extend the remaining life of its paper insulation. However, power transformers often fail on problems other than aged paper insulation, such as the on-load tap changer. This can be a problem when rooftop PV is installed because it changes the load profile throughout the day. In this article we present the findings of an analysis on the sub-transmission network of Townsville, a city of 200,000 people in northern Queensland. The load profile of eleven power transformers in six substations was investigated, with IEC thermal models applied to estimate hot-spot temperature. The relative effect of PV on the weighted hot-spot temperature was investigated, and then a determination was made on the likely loss of life. The effect of weather on the on-load tap changer was also investigated with the findings reported.
Keyword Paper insulation
Photovoltaic systems
Power transformers
Remaining life assessment
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

 
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Created: Fri, 22 Jan 2016, 19:17:42 EST by Dr Olav Krause on behalf of School of Information Technol and Elec Engineering