DocumentCode :
2318360
Title :
The effect of thermal ageing on the electrical characteristics of insulating oil for pole transformers
Author :
Jung, Jong-Wook ; Jung, Jin-Soo
Author_Institution :
Electr. Safety Res. Inst., Korea Electr. Safety Corp., Seoul
fYear :
2008
fDate :
21-24 April 2008
Firstpage :
303
Lastpage :
306
Abstract :
This paper describes the electrical characteristics of insulating oil employed in pole transformers. In the experiment, temperature and frequency were selected as variables, and dielectric characteristic values such as the relative permittivity, the tandelta and the specific resistance of the insulating oil were measured by a WinDETA system. As a result, the dielectric characteristics of the testing objects were temperature and frequency-dependent, and especially, the relative permittivities of each object showed considerable difference. In addition, the specific resistance acted as a key factor determining the insulating performance, and it was rather frequency dependent than temperature dependent. And, the dielectric values measured before ageing was slightly different from those after ageing. Dielectric dispersion due to the space charge polarization was observed in all testing objects.
Keywords :
ageing; permittivity; power transformers; thermal analysis; transformer oil; WinDETA system; dielectric characteristic values; frequency-dependent; insulating oil; pole transformers; relative permittivity; thermal ageing effect; Aging; Dielectric measurements; Dielectrics and electrical insulation; Electric variables; Frequency; Oil insulation; Permittivity; Petroleum; Power transformer insulation; Temperature; ageing; dielectric dispersion; electrical characteristic; frequency; insulating oil; relative permittivity; space charge polarization; specific resistance; tanδ; temperature; variable;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Condition Monitoring and Diagnosis, 2008. CMD 2008. International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-1621-9
Electronic_ISBN :
978-1-4244-1622-6
Type :
conf
DOI :
10.1109/CMD.2008.4580287
Filename :
4580287
Link To Document :
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