Investigating the impedance of a wooden power pole after a pole fire

Sokolowski, P, Dwivedi, A, Pathak, S, Buratto, F and Yu, X 2008, 'Investigating the impedance of a wooden power pole after a pole fire', in Faz Rahman (ed.) Porceedings of the Australasian Universities Power Engineering Conference 2008, Sydney, Australia, 14-17 December, 2008.


Document type: Conference Paper
Collection: Conference Papers

Title Investigating the impedance of a wooden power pole after a pole fire
Author(s) Sokolowski, P
Dwivedi, A
Pathak, S
Buratto, F
Yu, X
Year 2008
Conference name Australasian Universities Power Engineering conference 2008
Conference location Sydney, Australia
Conference dates 14-17 December, 2008
Proceedings title Porceedings of the Australasian Universities Power Engineering Conference 2008
Editor(s) Faz Rahman
Publisher Institute of Electrical and Electronics Engineers
Place of publication Piscataway, NJ
Abstract Wooden pole fires caused by leakage current flow are a major problem faced by various power distribution utilities in Australia and many other parts of the world. This paper investigates a fire at the bolt mounting a transformer to a 22kV wooden structure experienced by one of the electricity distribution utilities in Australia. A comparative analysis is undertaken between the damaged pole and an undamaged pole of similar ages and species. The effect of sapwood conductivity and varying moisture content on leakage current flowing through the wooden structure is studied. The impedances of each pole under different weather conditions are also examined in detail. A relatively low leakage current magnitude is observed to be enough current flow to create sufficient heat, causing smouldering. A combination of environmental factors and pole configuration created the right circumstances for the resulting pole fire.
Subjects Signal Processing
Power and Energy Systems Engineering (excl. Renewable Power)
Keyword(s) leakage current
transformer
wooden poles
distribution
high impedance fault
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