Partial discharges in mineral oils take place in the form of pulse bursts within minute microcavities, which are formed at high-electric field charge injection sites. The lifetime of these transient microcavities is determined by the interval between their creation and their ultimate collapse due to dynamic instability. The vapor pressure within these microcavities has been estimated to be as high as 10 MPa and lately there has been considerable speculation as to the nature and type of gases within these microcavities. Currently, carried out experiments indicate that these gases consist principally of hydrogen, CH 4 (methane), and C2H6 (ethane) with smaller traces of other lower molecular weight hydrocarbons.
Gas Formation in Transient Cavities Undergoing PD Pulse Burst Discharges in Transformer Oils / Pompili, Massimo; R., Bartnikas. - In: IEEE TRANSACTIONS ON PLASMA SCIENCE. - ISSN 0093-3813. - STAMPA. - 42:6(2014), pp. 1697-1703. [10.1109/TPS.2014.2317847]
Gas Formation in Transient Cavities Undergoing PD Pulse Burst Discharges in Transformer Oils
POMPILI, Massimo;
2014
Abstract
Partial discharges in mineral oils take place in the form of pulse bursts within minute microcavities, which are formed at high-electric field charge injection sites. The lifetime of these transient microcavities is determined by the interval between their creation and their ultimate collapse due to dynamic instability. The vapor pressure within these microcavities has been estimated to be as high as 10 MPa and lately there has been considerable speculation as to the nature and type of gases within these microcavities. Currently, carried out experiments indicate that these gases consist principally of hydrogen, CH 4 (methane), and C2H6 (ethane) with smaller traces of other lower molecular weight hydrocarbons.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
