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On the Use of Metal Oxide Varistors as a Snubber Circuit in Solid-State Breakers
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.ORCID iD: 0000-0003-3515-3536
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.
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2013 (English)In: 2013 4th IEEE/PES Innovative Smart Grid Technologies Europe, ISGT Europe 2013, IEEE , 2013, 6695454- p.Conference paper, Published paper (Refereed)
Abstract [en]

When solid-state switches are used in DC-breaker topologies, the turn-off operation can cause transient over-voltages that might harm the semiconductor itself. The over-voltage is caused by the combination of the very rapid current decrease of a solid-state switch and an undesired stray inductance in the parallel MOV-branch. The authors have proposed a possible solution where a smaller MOV is connected close to the solid-state switch to limit the over-voltage. This way, the over-voltage protection can be separated from the energy absorption task of the MOV. A small scale test set-up has been used to show that the peak voltage across the breaker is fully determined by the inner MOV. It is also shown that the performance can be increased by changing the U-I-characteristics of the outer MOV by adding several components in parallel.

Place, publisher, year, edition, pages
IEEE , 2013. 6695454- p.
Series
IEEE PES Innovative Smart Grid Technologies Conference Europe, ISSN 2165-4816
Keyword [en]
DC-Breaker, Metal Oxide Varistor, Over-Voltage Protection, Snubber Circuit, Solid-State Circuit Breaker
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-138965DOI: 10.1109/ISGTEurope.2013.6695454ISI: 000330939800217Scopus ID: 2-s2.0-84893613799ISBN: 978-147992984-9 (print)OAI: oai:DiVA.org:kth-138965DiVA: diva2:681992
Conference
2013 4th IEEE/PES Innovative Smart Grid Technologies Europe, ISGT Europe 2013; Lyngby; Denmark; 6 October 2013 through 9 October 2013
Funder
StandUp
Note

QC 20140312

Available from: 2013-12-20 Created: 2013-12-20 Last updated: 2014-03-12Bibliographically approved

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Magnusson, Jesper

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