Sweep Frequency Response Analysis test as tool for distribution transformers management

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CIRED 2019 - 697.pdf (893.29 KB)

Paper number

697

Working Group Number

Conference name

CIRED 2019

Conference date

3-6 June 2019

Conference location

Madrid, Spain

Peer-reviewed

Yes

Short title

Convener

Authors

Mayora, Hernan, IITREE - LAT, Argentina
Alvarez, Raúl Emilio, IITREE - LAT, Argentina
Calo, Emilio, IITREE - LAT, Argentina
Catalano, Leonardo, IITREE - LAT, Argentina
Morcelle del Valle, Pablo, IITREE - LAT, Argentina

Abstract

Distribution transformers used in secondary substations are strongly affected during faults in low voltage grids. Transformers are expected to survive a number of short circuits without failure but, once any significant winding deformation or core damage is produced, the service life and the likelihood of surviving further short circuits is greatly reduced because of locally increased electromagnetic stresses.Given the need for diagnosing failures and quickly putting the unit back into service it is evident that a complete set of tests, as done in power transformers’ condition assessment, is not an option.The main objective of this paper is to present Sweep Frequency Response Analysis (SFRA) test as an alternative to assess the mechanical condition of distribution transformers. For this purpose, a special design of a distribution transformer was used to simulate some failure modes and improve interpretation criteria.

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Publisher

AIM

Date

2019-06-03

Published in

CIRED 2019 Conference

Permanent link to this record

https://cired-repository.org/handle/20.500.12455/121
http://dx.doi.org/10.34890/241

ISSN

2032-9644

ISBN

978-2-9602415-0-1