Identifying partial discharge (PD) phenomena in power transformers is the key to achieve proper maintenance actions. In order to tag a recorded PD pattern obtained from either on site testing or monitoring as, e.g., internal, surface or corona discharges, a diagnostic database has to be built first. This database would contain patterns and relevant statistic parameters recorded in the lab under controlled conditions. One of the limits of this approach is that several factors may influence the PD pattern or the partial discharge inception voltage and, thus, identification procedures. In this paper, focus will be on the effects of both temperature and oil flow velocity on surface PD in a pressboard layer at five different oil speeds and with static oil. Statistical analysis is presented to compare the PDIV values
The influence of oil speed and temperature on PD phenomena in transformer insulation 2012 IEEE International Symposium on Electrical Insulation / C. G. Azcarraga;A. Cavallini;G. C. Montanari. - STAMPA. - (2012), pp. 494-497. (Intervento presentato al convegno International Symposium on Electrical Insulation tenutosi a San Juan, Puerto Rico nel 10-13 June 2012) [10.1109/ELINSL.2012.6251518].
The influence of oil speed and temperature on PD phenomena in transformer insulation 2012 IEEE International Symposium on Electrical Insulation
CAVALLINI, ANDREA;MONTANARI, GIAN CARLO
2012
Abstract
Identifying partial discharge (PD) phenomena in power transformers is the key to achieve proper maintenance actions. In order to tag a recorded PD pattern obtained from either on site testing or monitoring as, e.g., internal, surface or corona discharges, a diagnostic database has to be built first. This database would contain patterns and relevant statistic parameters recorded in the lab under controlled conditions. One of the limits of this approach is that several factors may influence the PD pattern or the partial discharge inception voltage and, thus, identification procedures. In this paper, focus will be on the effects of both temperature and oil flow velocity on surface PD in a pressboard layer at five different oil speeds and with static oil. Statistical analysis is presented to compare the PDIV valuesI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
