LAPSE:2023.20554v1
Published Article
LAPSE:2023.20554v1
Algorithm for Fast Detection of Stator Turn Faultsin Variable-Speed Synchronous Generators
March 20, 2023
Faults between stator winding turns of synchronous generators have led to specific changes in the harmonic content of currents. In this paper, these changes are used to detect faults in variable-speed synchronous generators connected to three-level converters during their operation. Currents typically measured for control purposes are used to avoid installation of additional sensors. The neutral point current of the three-level converter is also evaluated under faults in the generator. Encoder-tuned dynamic filters based on Park transformation and Fourier coefficients together with low-pass filters are used to detect the selected harmonics under variable speeds. The geometric loci of these components are proposed as a method to distinguish between healthy and faulty conditions. Simulation and experimental data are used to test sensitivity, selectivity and detection time of the proposed technique for different fault types. Generalization for a different generator is also presented and tested. Most fault cases were detected using the harmonics.
Record ID
Keywords
Fault Detection, protection, stator faults, synchronous generator, three-level converter, turn faults, variable speed, voltage-source converters
Subject
Suggested Citation
Rocha RV, Monaro RM. Algorithm for Fast Detection of Stator Turn Faultsin Variable-Speed Synchronous Generators. (2023). LAPSE:2023.20554v1
Author Affiliations
Journal Name
Energies
Volume
16
Issue
5
First Page
2491
Year
2023
Publication Date
2023-03-06
Published Version
ISSN
1996-1073
Version Comments
Original Submission
Other Meta
PII: en16052491, Publication Type: Journal Article
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LAPSE:2023.20554v1
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doi:10.3390/en16052491
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Mar 20, 2023
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