19-05-2010, 07:24 PM
Presented By:
Muhammad Azizi Abdul Rahman; Halimatun Hashim; P.S. Ghosh
Electrical Engineering Department
Abstract
Monitoring the health of power transformer is important for the reliability of electrical power supply. Conventional tests carried out on power transformers can only detect damage of permanent nature. Frequency Response Analysis (FRA) is found to be a useful tool for reliable detection of incipient mechanical fault in a transformer. There are various methods of evaluating the frequency spectrum to confirm the presence of an incipient fault. This paper aims to detect and identify the type of faults existing in the windings and core of 132/33kV, 90MVA power transformer based on FRA data using signal processing techniques, taking into consideration the recommended frequency range specified by Doble Engineering Company. Thus, it is found that the proposed technique is very efficient and effective in analyzing and detecting accurately the type of mechanical fault existing in a power transformer.
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http://www.itee.uq.edu.au/~aupec/aupec03...0paper.pdf