Patent ID: 8762081
Filing Date: 2014-06-24
Classification: G01R

Abstract:
1. A method for locating partial discharges occurring at a discharge site ( 2 ) in an electric apparatus ( 3 ) with elongate geometry and generating corresponding electric pulses ( 4 ) propagating in opposite directions along the apparatus ( 3 ) from the discharge site ( 2 ), the method comprising the following steps: detecting ( selecting ( deriving, for the signals of the selected pair of homologous pulses ( calculating ( wherein said processing comprises the calculation of an algorithm which links the attenuation parameter value of one of the signals of the pair of homologous pulses to the attenuation parameter value of the other one of the signals of the pair of homologous pulses, as a function of the difference between the distances of the first and a second detecting station ( 6 , 8 ) with respect to the discharge site ( 2 ), whereby said algorithm expresses the attenuation of the pulses ( 4 ) due to their propagation through the electric apparatus ( 3 ) from the discharge site ( 2 ) to the detecting stations ( 6 , 8 ), wherein the amplitude attenuation of one of the signals of said pair of homologous pulses previously selected is compared to the amplitude attenuation of the other one of the signals of the same pair of homologous pulses, for calculating the distances of the discharge site ( 2 ) from the detecting stations.