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Partial discharge (PD) location in power transformers using electrical methods require transformer parameters to estimate the PD location. Previous research using a lumped parameter model of a transformer consisting of inductance (L), series capacitance (K) and shunt capacitance (C) has shown an algorithm for PD location. This algorithm does not require L, K and C values for the transformer in their...
Impedance analyzers are efficient in acquiring wide range impedance measurements in a wide frequency range. However, when measuring low impedances, short circuits used for compensation process can't be considered as ideal and analogue problem appears for open circuit compensation. Fortunately, because impedance matrix of a two-port passive circuit is symmetrical, characterizing this circuit by four...
This paper has an objective to show a developed quantitative criterion, based in two mathematical variables that explicit the deviation degree of a normal situation, applying simultaneously data from terminal impedances and frequency response. Based in more than 100-measured equipment, of different applications (step-up transformer, transmission transformer, etc.,), for a period of 10 years, the work...
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