Title :
A Transformer Thermal Model for use in an on-line Monitoring and Diagnostic System
Author :
Elmoudi, Asaad ; Palola, Jussi ; Lehtonen, Matti
Author_Institution :
Helsinki Univ. of Technol., Espoo
fDate :
Oct. 29 2006-Nov. 1 2006
Abstract :
In this paper a transformer thermal dynamic model for use in an on-line monitoring and diagnostic system is examined. The model is established to calculate the real time top oil and hot spot temperatures in the form of simple equivalent circuit, based on the fundamental heat transfer theory. A substation transformer was chosen and equipped with sensors to gather data. A non-linear least squares algorithm is used to determine the top oil model parameters that best fit the measurements for different cooling modes. The hot spot temperature is simulated. The model showed good results
Keywords :
condition monitoring; equivalent circuits; heat transfer; least squares approximations; power transformer insulation; substation insulation; temperature measurement; temperature sensors; thermal analysis; transformer oil; transformer substations; cooling modes; equivalent circuit; heat transfer theory; hot spot temperature calculation; nonlinear least squares algorithm; on-line diagnostic system; on-line monitoring; real time top oil calculation; sensors; substation transformer; transformer thermal dynamic model; Circuit simulation; Cooling; Equivalent circuits; Heat transfer; Least squares methods; Monitoring; Oil insulation; Petroleum; Substations; Temperature sensors;
Conference_Titel :
Power Systems Conference and Exposition, 2006. PSCE '06. 2006 IEEE PES
Conference_Location :
Atlanta, GA
Print_ISBN :
1-4244-0177-1
Electronic_ISBN :
1-4244-0178-X
DOI :
10.1109/PSCE.2006.296462
