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DC poleHodnotaJazyk
dc.contributor.authorMayer, Daniel
dc.date.accessioned2021-11-01T11:00:36Z-
dc.date.available2021-11-01T11:00:36Z-
dc.date.issued2021
dc.identifier.citationMAYER, D. Protection of power transformers against the effect of magnetic storms. Journal of ELECTRICAL ENGINEERING, 2021, roč. 72, č. 4, s. 249-255. ISSN: 1335-3632cs
dc.identifier.issn1335-3632
dc.identifier.urihttp://hdl.handle.net/11025/45631
dc.format7 s.cs
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherDe Gruyter Polanden
dc.relation.ispartofseriesJournal of ELECTRICAL ENGINEERINGen
dc.rights© Creative Commons Attribution-NonCommercial-NoDerivs Licenseen
dc.titleProtection of power transformers against the effect of magnetic stormsen
dc.typečlánekcs
dc.typearticleen
dc.rights.accessopenAccessen
dc.type.versionpublishedVersionen
dc.description.abstract-translatedIn the operation of large-scale power systems for the long-distance transmission of large amounts of electricity, a number of cases have been reported in which anomalies in the Earth’s magnetosphere, referred to as geomagnetic storms, have caused a severe system collapse. Changes in the geomagnetic field cause a semi-saturating phenomenon, in which the high-voltage lines and especially the high-voltage windings of the power transformers of the system are overloaded with current and subsequently also thermally. The present article briefly explains the physical nature of magnetic storms and then describes a new device that either eliminates the possibility of a step-down power transformer accident or significantly reduces its effects on the system. The essence of this device are frequency filters, which are connected in parallel to the high-voltage windings of power transformers. At the beginning of a geomagnetic storm, the frequency filter is automatically connected to the system and is automatically disconnected when it subsides. The operation of frequency filters does not require human intervention, acquisition and operating costs are low and their integration into existing power systems is easy.en
dc.subject.translatedgeomagnetic fielden
dc.subject.translatedcoronal mass ejectionen
dc.subject.translatedgeomagnetically induced currentsen
dc.subject.translatedmagnetic semi-saturationen
dc.subject.translatedfrequency filteren
dc.identifier.doi10.2478/jee-2021-0034
dc.type.statusPeer-revieweden
dc.identifier.document-number696957400004
dc.identifier.obd43933342
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