Title :
Influence of temperature on frequency response analysis of transformer winding
Author :
Bagheri, Mehdi ; Phung, B.T. ; Blackburn, Trevor ; Naderian, Ali
Author_Institution :
Univ. of New South Wales, Sydney, NSW, Australia
Abstract :
Frequency Response Analysis (FRA) has been operated since last decade as a sensitive method in transformer internal defect recognition. This study has concentrated on influence of temperature variation of the transformer winding on FRA trace. An oil-free single phase model transformer involving concentric LV and HV windings is taken as a test object. The test object temperature is changed widely from low to high temperatures and the frequency response traces of the windings are recorded. In addition, a pair of winding discs including oil filled metal container is taken as another test object and its frequency response traces are recoded for various temperatures. FRA traces deviations as well as total capacitance variation due to the temperature changes in transformer windings are elaborated and discussed.
Keywords :
frequency response; transformer windings; capacitance variation; concentric HV windings; concentric LV windings; frequency response analysis; oil filled metal container; oil-free single phase model transformer; transformer internal defect recognition; transformer winding; Capacitance; Frequency response; Moisture; Oil insulation; Power transformer insulation; Resonant frequency; Windings; Frequency response analysis; Moisture content; Temperature; Transformer diagnosis;
Conference_Titel :
Electrical Insulation Conference (EIC), 2013 IEEE
Conference_Location :
Ottawa, ON
Print_ISBN :
978-1-4673-4738-9
Electronic_ISBN :
978-1-4673-4739-6
DOI :
10.1109/EIC.2013.6554198
