Power transformer loading studies considering overexcitation

Author

Castro, Carlos R T ; Barbosa, Sérgio R. ; Ferreira, Helder L. ; Samico, Luis E. ; Lopes, Ivan J S ; Silva, Selênio R.

Author_Institution

Power Transformers Div., Toshiba Brazil, Brazil

fYear

2004

fDate

8-11 Nov. 2004

Firstpage

651

Lastpage

656

Abstract

The paper addresses the problem of transformer loading calculations considering overexcited transformer operation. General aspects of the current loading guides are presented and discussed on the light of the transformer design characteristics. Overexcitation and its impact on the loading conditions are discussed. A loading calculation method is proposed, and a database consisting of around 50 power transformers real test data is used to analyze the overexcitation problem and its impact on the insulation transformer life expectancy.

Keywords

life testing; overvoltage; power transformer insulation; power transformer testing; insulation transformer life expectancy; loading calculation method; overexcited transformer operation; performance characteristics; power transformer; real test data; transformer design characteristics; transformer loading calculation; Databases; Guidelines; Insulation life; Insulation testing; Life testing; Oil insulation; Power transformer insulation; Power transformers; Temperature; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Transmission and Distribution Conference and Exposition: Latin America, 2004 IEEE/PES

Print_ISBN

0-7803-8775-9

Type

conf

DOI

10.1109/TDC.2004.1432456

Filename

1432456