The most commonly used criteria for PDIV (partial-discharge inception voltage) determination are examined using three synthetic transformer oils as test fluids. It is shown that the PD amplitude distribution changes both with increasing applied voltage and with test duration. The use of a multichannel analyzer was shown to be most helpful in rendering the PDIV statistically more meaningful. It is noted that both the number and amplitude of PDs are random phenomena the occurrence of which is hard to predict. Close to the breakdown voltage the PD activity increases and its amplitude spectrum approaches a quasi-exponential shape.
Partial discharge amplitude distribution of power transformer oils / Pompili, Massimo; MAZZETTI DI PIETRALATA, Carlo; R., Schifani. - STAMPA. - 1:(1990), pp. 133-136. (Intervento presentato al convegno Conference Record of the 1990 IEEE International Symposium on Electrical Insulation tenutosi a Toronto, Ca nel 3 June 1990 through 6 June 1990) [10.1109/elinsl.1990.109724].
Partial discharge amplitude distribution of power transformer oils
POMPILI, Massimo;MAZZETTI DI PIETRALATA, Carlo;
1990
Abstract
The most commonly used criteria for PDIV (partial-discharge inception voltage) determination are examined using three synthetic transformer oils as test fluids. It is shown that the PD amplitude distribution changes both with increasing applied voltage and with test duration. The use of a multichannel analyzer was shown to be most helpful in rendering the PDIV statistically more meaningful. It is noted that both the number and amplitude of PDs are random phenomena the occurrence of which is hard to predict. Close to the breakdown voltage the PD activity increases and its amplitude spectrum approaches a quasi-exponential shape.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
