Residual Magnetic Flux of Transformer at Power System Accident

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Paper number
110
Working Group Number
Conference name
CIRED 2019
Conference date
3-6 June 2019
Conference location
Madrid, Spain
Peer-reviewed
Yes
Short title
Convener
Authors
Himata, Yukihiko, Tokyo Denki University, Japan
Nakajima, Takashi, Tokyo Denki University, Japan
Koshizuka, Tadashi, Tokyo Denki University, Japan
Maruyama, Shiro, Toshiba Energy Systems & Solution Corporation, Japan
Saito, Minoru, Toshiba Energy Systems & Solution Corporation, Japan
Maejima, Hiroyuki, Toshiba Energy Systems & Solution Corporation, Japan
Abstract
When a transformer is being energized, a large magnetizing inrush current flows depending upon the closing phase of circuit breakers and the residual magnetic flux in the iron core. One of the suppressing the magnetizing inrush current method is controlling closing phase of the circuit breaker. For the controlled switching, to grasp condition of residual magnetic flux in the iron core is essential. Ample studies demonstrate that residual magnetic flux for no-load transformers. The residual magnetic flux for three-phase three-leg transformer had been investigated. However, little is known about residual magnetic flux after fault current interruption.In this paper, the residual magnetic fluxes after interruption at one line ground (1LG) and two lines short-circuited (2LS) faults in isolated neutral system were investigated with experiments and calculations.
Table of content
Keywords
Publisher
AIM
Date
2019-06-03
Permanent link to this record
https://cired-repository.org/handle/20.500.12455/382
http://dx.doi.org/10.34890/606
ISSN
2032-9644
ISBN
978-2-9602415-0-1