Experimental and theoretical analysis of vacuum circuit breaker prestrike effect on a transformerPopov, M.; Smeets, R.P.P.; Sluis, van der, L.; Herdt, de, H.; Declercq, J.
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Citation for published version (APA):Popov, M., Smeets, R. P. P., Sluis, van der, L., Herdt, de, H., & Declercq, J. (2009). Experimental and theoretical analysis of vacuum circuit breaker prestrike effect on a transformer. IEEE Transactions on Power Delivery, 24(3), 1266-1274. DOI: 10.1109/TPWRD.2009 General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ?
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I. INTRODUCTION
IT IS well known that during switching highly inductive loads like transformers and motors, under specific conditions, multiple restrikes in the circuit breaker can occur. Multiple restrikes are fast voltage surges which proceed along the cable and reach transformer or motor terminals. Because of different surge impedances at terminals, a wave reflection and absorption takes place. Voltage oscillations which proceed toward windings are continuously superposed by new voltage waves from new upcoming surges. Hence, voltage waveforms along the transformer winding within a particular time interval can have very different amplitude and rate of rise. Their oscillations contain a broad frequency range which can be from a few kilohertz up to a few megahertz. These are unwanted phenomena [15]. This model is based on the measured frequency admittance matrix of the transformer, the elements of which are admittances measured from any provided measuring point in the transformer windings [16]. The advantage o...
