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Magnetizing switching inrush: Estimation and a novel circuitry for inrush elimination
S. Das, , T.K. Bhattacharya, S. SenGupta
Published in
Volume: 10
Issue: 1
A power transformer, when energized at no-load, may have transient currents up to 100 times that of the steady state magnetizing current. This inrush current has several detrimental effects on power quality and may damage sensitive equipment connected to the system. In this paper, a power electronic based control circuit is developed, which estimates the last remnant and, utilizing this data, it controls the next re-energization instant to achieve inrush free switching. An equivalent circuit model of a transformer is also presented to simulate the transient dynamic performance of a transformer for any arbitrary switching operation. © 2009 The Berkeley Electronic Press. All rights reserved.
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