Proceedings ArticleDOI
Evaluation of the applicability of FRA for inter-turn fault detection in stator windings
Francisco R. Blanquez,Carlos A. Platero,E. Rebollo,F. R. Blanquez +3 more
- pp 177-182
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TLDR
In this paper, the applicability of the FRA technique is discussed as a method for detecting inter-turn faults in stator windings, and the results of the application of this technique to the detection of interturn faults justify further research in optimizing this technique for preventive maintenance.Abstract:
In this paper, the applicability of the FRA technique is discussed as a method for detecting inter-turn faults in stator windings. Firstly, this method is tested in an individual medium-voltage stator coil with satisfactory results. Secondly, the tests are extended to a medium-voltage induction motor stator winding, in which inter-turn faults are performed in every coil end of one phase. Results of the frequency response in case of inter-turn faults are evaluated in both cases for different fault resistance values. The experimental setup is also described for each experiment. The results of the application of this technique to the detection of inter-turn faults justify further research in optimizing this technique for preventive maintenance.read more
Citations
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Journal ArticleDOI
Early detection of insulation failures on electric generators through online Frequency Response Analysis
Wilson Cesar Sant’Ana,Camila Paes Salomon,Germano Lambert-Torres,Luiz Eduardo Borges da Silva,Erik Leandro Bonaldi,Levy Ely de Lacerda de Oliveira,Jonas Guedes Borges da Silva +6 more
TL;DR: In this article, an equipment for FRA of electric machines has been developed and its online connection to an induction generator through a C-L-C T-type coupling is presented, which implies in a design trade-off between the attenuation of the power signal at fundamental frequency (which may damage the electronics of the analyzer) and the useful area obtained in the FRA spectra.
Proceedings ArticleDOI
Effects of transmission belt looseness on electrical and mechanical measurements of an induction motor
Etienne Fournier,Antoine Picot,Jeremi Regnier,Christian Andrieux,Jacques Saint-Michel,Pascal Maussion +5 more
TL;DR: In this paper, the impact of belt looseness on electrical and mechanical quantities of a system driven by an induction motor and a belt-pulley transmission is investigated under steady state operation.
Journal ArticleDOI
Statistic-Based Method to Monitor Belt Transmission Looseness Through Motor Phase Currents
Antoine Picot,Etienne Fournier,Jeremi Regnier,Mathias Tientcheu-Yamdeu,Jean-Marie Andrejak,Pascal Maussion +5 more
TL;DR: This analysis enlightens the advantage of the transient state to detect belt looseness because it exacerbates belt slip and demonstrates that higher load conditions are more accurate for the monitoring of belt loosening.
Proceedings ArticleDOI
Reliable Diagnostics on Rotating Machines using FRA
TL;DR: The frequency response analysis (FRA) is a known highly sensitive method to detect mechanical and electrical defects in power transformers, such as broken rods of damping windings in synchronous machines or in a squirrel cage of induction motors.
Journal ArticleDOI
Validity of Frequency Response Analysis (FRA) for Diagnosing Large Salient Poles of Synchronouos Machines
TL;DR: It is demonstrated that the stator core has a significant influence on poles FRA results, and FRA can be considered a suitable technique for the ground and interturn faults detection in poles of large synchronous machines.
References
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Journal ArticleDOI
Exploring possibilities for characterization of power transformer insulation by frequency response analysis (FRA)
TL;DR: In this article, the authors explored the possibility of using frequency response analysis (FRA) technique to characterize the quality of transformer insulation and developed a single-phase and a three-phase lumped parameter circuit models.
Journal ArticleDOI
A New Method for AC Machine Turn Insulation Diagnostic Based on High Frequency Resonances
TL;DR: In this article, the authors present a monitoring system able to detect slight variations of high frequency resonances in the winding of a working machine fed by an industrial inverter, which works in association with statistical data on accelerated aging of the magnet wire used to build the machine.
Journal ArticleDOI
Interpretation of Transformer FRA Responses— Part I: Influence of Winding Structure
TL;DR: In this paper, the authors address one of the major factors that affect the FRA responses: the winding structure itself, which can be categorized into windings with either high- or low-series capacitance in proportion to the shunt capacitance.
Journal ArticleDOI
Improved detection of power transformer winding movement by extending the FRA high frequency range
TL;DR: In this article, the effects of the conventional test circuits mask the changes at the higher frequencies, and a new test method is proposed that is effective up to at least 10 MHz.
Journal ArticleDOI
Winding movement in power transformers: a comparison of FRA measurement connection methods
TL;DR: In this article, a comparison of three FRA measurement connections, namely, end-to-end voltage ratio, input admittance and transfer voltage ratio measurements, was performed on a 132/11 kV, 30 MVA transformer.
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