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dc.contributor.authorEhya, Hossein
dc.contributor.authorNysveen, Arne
dc.contributor.authorGroth, I. L.
dc.contributor.authorMork, Bruce A.
dc.date.accessioned2021-09-22T11:55:30Z
dc.date.available2021-09-22T11:55:30Z
dc.date.created2021-02-09T10:27:31Z
dc.date.issued2020
dc.identifier.isbn978-1-7281-9945-0
dc.identifier.urihttps://hdl.handle.net/11250/2780317
dc.description.abstractThe excitation windings of the synchronous generators are generally reliable. However, electrical, mechanical, and thermal stresses that the machine is exposed to during its operation leads to the inter-turn and ground insulation faults. On-line condition monitoring could provide a valuable real-time assessment of the synchronous generator. It could discriminate gradual aggravating defects at an incipient stage before it leads to irreversible and costly damages. On-line monitoring of the air gap magnetic field has been used in different types of electrical machines. However, some concerns should be considered when applying this method to the salient pole synchronous generators (SPSG), especially in the SPSG, with a large number of turns per poles that show less or lack of sensitivity to a fault. This difficulty could be solved by wise locating of the Hall effect sensor, choosing precise sampling rate, re-sampling the data and signal processing approach. In this paper, detailed online monitoring of the air gap magnetic field under the excitation winding defect is proposed. A procedure that could detect the severity and location of the fault-based on different analyzing methods of flux density in no-load and full load is proposed. The nominated approach is examined by using numerical modeling and a experimental test rig with a 100 kVA SPSG. It is proven that the air gap magnetic field spectrum could provide a reliable assessment of the machine under the short circuit fault of the rotor field winding.en_US
dc.language.isoengen_US
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en_US
dc.relation.ispartofProc. 2020 International Conference on Electrical Machines (ICEM)
dc.titleDetailed Magnetic Field Monitoring of Short Circuit Defects of Excitation Winding in Hydro-generatoren_US
dc.typeChapteren_US
dc.description.versionacceptedVersionen_US
dc.rights.holder© IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.en_US
dc.identifier.doihttp://dx.doi.org/10.1109/ICEM49940.2020.9270942
dc.identifier.cristin1887976
dc.relation.projectNorges forskningsråd: 257588en_US
cristin.ispublishedtrue
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