Title :
Temperature rises in an OFAF transformer at OFAN cooling mode in service
Author :
Susa, Dejan ; Palola, Jussi ; Lehtonen, Matti ; Hyvärinen, Markku
Author_Institution :
Helsinki Univ. of Technol., Espoo, Finland
Abstract :
In order to properly assess operating conditions of a 40 MVA, oil-forced air-forced (OFAF) transformer unit in service the permanent online monitoring system has been upgraded. Dissolved gas analysis laboratory measurements are also applied. The hot-spot temperature and the top-oil temperature responses predicted by two different thermal methods are compared to measured values.
Keywords :
computerised monitoring; power engineering computing; power transformers; temperature measurement; cooling; dissolved gas analysis; hot-spot temperature; oil-forced air-forced transformer; permanent online monitoring system; thermal methods; top-oil temperature; Cooling; Dissolved gas analysis; Oil insulation; Petroleum; Power transformer insulation; Power transformers; Temperature; Testing; Thermal loading; Thermal resistance; Dissolved gas analysis (DGA); hot-spot temperature; power transformer; top-oil temperature;
Journal_Title :
Power Delivery, IEEE Transactions on
DOI :
10.1109/TPWRD.2005.852284
