IMPROVING PERSONAL SAFETY IN MV-NETWORKS THROUGH NOVEL EARTH-FAULT CURRENT BASED FEEDER PROTECTION

dc.contributor.affiliationABB Oy
dc.contributor.affiliationABB Oy
dc.contributor.affiliation-
dc.contributor.affiliationJE-Siirto Oy Jyväskylän Energiayhtiöt
dc.contributor.authorWahlroos, Ari
dc.contributor.authorAltonen, Janne
dc.contributor.authorPitkänen, Risto
dc.contributor.authorKauppinen, Sakari
dc.contributor.countryFinland
dc.contributor.countryFinland
dc.contributor.countryFinland
dc.contributor.countryFinland
dc.contributor.detailedauthorWahlroos, Ari, ABB Oy, Finland
dc.contributor.detailedauthorAltonen, Janne, ABB Oy, Finland
dc.contributor.detailedauthorPitkänen, Risto, -, Finland
dc.contributor.detailedauthorKauppinen, Sakari, JE-Siirto Oy Jyväskylän Energiayhtiöt, Finland
dc.date.accessioned2019-07-24T12:37:23Z
dc.date.available2019-07-24T12:37:23Z
dc.date.conferencedate3-6 June 2019
dc.date.issued2019-06-03
dc.description.abstractIn this paper a novel method for earth-fault (EF) protection applicable in high-impedance earthed networks, especially in resonant earthed networks, is described. The innovative method is not based on traditional zero-sequence quantities (Uo, Io), but on accurate estimation of EF-current (IF) flowing at the fault location. Estimation of EF-current is done utilizing changes in phase currents measured at the beginning of the feeder due to an earth fault. Thanks to its novel operation principle, the method has several advantages over the traditional state-of-art EF-protection methods such as the wattmetric method. The method enables automatic adaptation of protection operation speed according to the estimated EF-current magnitude, including the harmonic content, which further enhances the accuracy and practicality of the novel protection method. The estimated EF-current magnitude can be converted into corresponding touch voltage magnitude, which enables direct compliance of protection operation to the electrical safety codes, such as EN50522. In this paper, first the theory and operation principle of the new method is described. Then the performance of the suggested protection algorithm is validated using data from a field test in practical 20kV resonant earthed network. The results show that the novel method enables significant improvement on safety and overall dependability of the protection schemes used today.
dc.description.conferencelocationMadrid, Spain
dc.description.conferencenameCIRED 2019
dc.description.openaccessYes
dc.description.peerreviewedYes
dc.description.sessionOperation, control and protection
dc.description.sessionidSession 3
dc.identifier.isbn978-2-9602415-0-1
dc.identifier.issn2032-9644
dc.identifier.urihttps://cired-repository.org/handle/20.500.12455/120
dc.identifier.urihttp://dx.doi.org/10.34890/245
dc.language.isoen
dc.publisherAIM
dc.relation.ispartProc. of the 25th International Conference on Electricity Distribution (CIRED 2019)
dc.relation.ispartofseriesCIRED Conference Proceedings
dc.titleIMPROVING PERSONAL SAFETY IN MV-NETWORKS THROUGH NOVEL EARTH-FAULT CURRENT BASED FEEDER PROTECTION
dc.title.number695
dc.typeConference Proceedings
Files
Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
CIRED 2019 - 695.pdf
Size:
1.12 MB
Format:
Adobe Portable Document Format