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Computerised evaluation of the magnetising inrush current in transformers

✍ Scribed by Mohibullah Basu; K.P. Basu

Publisher
Elsevier Science
Year
1979
Tongue
English
Weight
238 KB
Volume
2
Category
Article
ISSN
0378-7796

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✦ Synopsis

Design of protective systems in large power transformers necessitates a detailed knowledge of the magnitude and shape of the magnetising inrush current during the switching operation. It is very difficult to evaluate the inrush current analytically owing to nonlinearity in the magnetisation (B-H) curve. This paper suggests a method for the computerised evaluation of the magnetising inrush current in transformers without any drastic linearising assumption for the B-H curve.

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## Abstract This paper proposes a new inrush current suppressor using a series‐connected small‐rated PWM converter for a transformer. The PWM converter is directly connected in series between the source and transformer without a matching transformer. The inrush phenomena of the matching transformer