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The location of a partial discharge (PD) source inside a transformer can be determined from the time differences of arrival (TDOA) between signals that are captured by an array of UHF sensors. From these, the PD location can be found by geometric triangulation which involves solving a set of non-linear equations. This can be achieved using an efficient software realization of the maximum-likelihood...
The ultra high frequency (UHF) detection method of partial discharge (PD) is presented in this paper. The log spiral and conical sensors were developed and used with a spectrum analyzer to detect PDs. Measurements of signals produced by two artificial PD defects were carried out in both broad and narrow band frequency ranges. The effectiveness of the sensors was compared and shown in this paper. Both...
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