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Communication Dans Un Congrès Année : 2023

Identification of sensitive feature in the stray magnetic field to detect rotor short-circuit fault in synchronous generators

Thierry Jacq
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Résumé

This paper presents an application of the external magnetic field measured in the vicinity of a synchronous generator in a hydroelectric powerplant for the detection of a rotor short circuit fault. The measurement of the external magnetic field was performed using a flux sensor and the analysis of the signal is done in a quantitative and qualitative way by considering the spectral evolution of the signal but also its temporal variation. The presented results are obtained analyzing several operating conditions of a 55 MW generator in healthy and fault case. We notice the interest of using the reduced values in percentage to better compare the different state of the machines. A vibration study is also presented at the end of the paper to complete the analysis.
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Dates et versions

hal-04296988 , version 1 (21-11-2023)

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Raphael Romary, Remus Pusca, Thierry Jacq. Identification of sensitive feature in the stray magnetic field to detect rotor short-circuit fault in synchronous generators. 2023 IEEE 14th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives (SDEMPED), Aug 2023, Chania, Greece. pp.123-128, ⟨10.1109/SDEMPED54949.2023.10271496⟩. ⟨hal-04296988⟩

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