A comparative study has been carried out on the partial discharge pulse epoch distribution characteristics of a dielectric liquid and of a bushing having a paper insulation impregnated with the same liquid. At the partial discharge inception voltage, the discharge pulse epochs in the dielectric liquid were found to be concentrated at and close to the applied voltage peaks; in contrast, the discharge epochs in the impregnated papers appeared at and in the vicinity of the voltage zeros thereby implying a normal discharge process within cavity type occlusions. The dielectric liquid-impregnated-paper insulation in the bushing did not evince any liquid phase like discharge pulses even at applied voltages substantially above its operating value.
Partial discharge pulse epoch distribution in dielectric liquids and impregnated papers under AC conditions / Pompili, Massimo; MAZZETTI DI PIETRALATA, Carlo; R., Bartnikas. - STAMPA. - (1999), pp. 215-218. (Intervento presentato al convegno Proceedings of the 1999 13th IEEE International Conference on Dielectric Liquids (ICDL '99) tenutosi a Nara, Jpn nel 20 July 1999 through 25 July 1999) [10.1109/icdl.1999.798909].
Partial discharge pulse epoch distribution in dielectric liquids and impregnated papers under AC conditions
POMPILI, Massimo;MAZZETTI DI PIETRALATA, Carlo;
1999
Abstract
A comparative study has been carried out on the partial discharge pulse epoch distribution characteristics of a dielectric liquid and of a bushing having a paper insulation impregnated with the same liquid. At the partial discharge inception voltage, the discharge pulse epochs in the dielectric liquid were found to be concentrated at and close to the applied voltage peaks; in contrast, the discharge epochs in the impregnated papers appeared at and in the vicinity of the voltage zeros thereby implying a normal discharge process within cavity type occlusions. The dielectric liquid-impregnated-paper insulation in the bushing did not evince any liquid phase like discharge pulses even at applied voltages substantially above its operating value.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
