Abstract

PASTORIZA, Vicente; POZA, Francisco; MARINO, Perfecto  and  MACHADO, Fernando. Feature Extraction from Electrical Equipment based on Vibration Measurements. Inf. tecnol. [online]. 2008, vol.19, n.4, pp.71-78. ISSN 0718-0764.  http://dx.doi.org/10.4067/S0718-07642008000400010.

A portable system for the condition monitoring of on-load tap changer in on-line power transformers by non-invasive inspections was developed. The system was based on a virtual instrument for measuring signals of voltage, current and vibration that a tap change produces. The the diagnosis of the functioning condition was done using vibration analysis. Inspections on transformers of several substations were done to test the proposed portable system. From the results, it is concluded that the virtual instrument facilitates this kind of inspection. Besides, a study carried out on a sole on-load tap changer did not discard the possibility of estimating the operating condition of on-load tap changers from the measured vibration signals. However, in order to guarantee this it will be necessary to performed more tests.

Keywords : electrical equipment; vibration analysis; on-load tap changers; power transformer.

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