Study of PD detection and location by means of acoustic measurements transformer

This paper applies a pattern recognition method for localisation of the PD site in the oil-filled transformer by acoustic measurements. By dividing the transformer into N numbers of 20/spl times/20/spl times/20 mm/sup 3/ sub-modules, the PD site is localised by comparing the spatial distances of each sub-module to the acoustic sensors. The numerical cases indicate that the proposed method is general and practical while avoiding some drawbacks in current algorithms. Moreover, the method improves the accuracy of localisation substantially when compared with the conventional localization method.