<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The air gap monitoring and fault diagnosis is exemplified for a slow-speed salient-pole generator of hydropower unit. Three types of measurements, namely, with contacting probes, non-contacting sensors and non-invasive sensors are discussed. For the case study non-contacting sensors were applied, with the results demonstrated. In the paper, different methods for evaluation of the results (e.g. using delta value and air gap variation criteria, graphical and spectrum analysis) are described and compared. It has been shown that the spectrum analysis describes changes in the eccentricity better than the criterion method, and is expected to supplement the graphical analysis in the future. Finally, the limitations of the spectrum analysis are formulated, and criteria for this type analysis are proposed.</p></abstract>

The air gap monitoring and fault diagnosis is exemplified for a slow-speed salient-pole generator of hydropower unit. Three types of measurements, namely, with contacting probes, non-contacting sensors and non-invasive sensors are discussed. For the case study non-contacting sensors were applied, with the results demonstrated. In the paper, different methods for evaluation of the results (e.g. using delta value and air gap variation criteria, graphical and spectrum analysis) are described and compared. It has been shown that the spectrum analysis describes changes in the eccentricity better than the criterion method, and is expected to supplement the graphical analysis in the future. Finally, the limitations of the spectrum analysis are formulated, and criteria for this type analysis are proposed.

Eccentricity Of Slow-Speed Salient-Pole Generator: Analysis Based On Air Gap Spectrum

Riga Technical University, 1 Kalku Str., Riga LV-1658, LATVIA

Latvian Journal of Physics and Technical Sciences

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

HIDROĢENERATORA EKSCENTRICITĀTES ANALĪZE, IZMANTOJOT GAISA SPRAUGAS SPEKTRA REZULTĀTUS

The air gap monitoring and fault diagnosis is exemplified for a slow-speed salient-pole generator of hydropower unit. Three types of measurements, namely, with...

Eccentricity Of Slow-Speed Salient-Pole Generator: Analysis Based On Air Gap Spectrum

Published Online: Mar 25, 2015

Page range: 26 - 37

DOI: https://doi.org/10.1515/lpts-2015-0003

Keywords
air gap, slow-speed generator, air gap spectrum

© M. Griscenko et al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Eccentricity Of Slow-Speed Salient-Pole Generator: Analysis Based On Air Gap Spectrum

Published Online: Mar 25, 2015

Page range: 26 - 37

DOI: https://doi.org/10.1515/lpts-2015-0003

Keywordsair gap, slow-speed generator, air gap spectrum

© M. Griscenko et al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
air gap, slow-speed generator, air gap spectrum