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http://dx.doi.org/10.5370/KIEEP.2015.64.4.236

Characteristic Analysis of Hot Spot Temperature according to Cooling Performance Variation of Natural Ester Transformer  

Kim, Ji-Ho (School of Electrical Engineering, Soongsil University)
Lee, Hyang-Beom (School of Electrical Engineering, Soongsil University)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers P / v.64, no.4, 2015 , pp. 236-240 More about this Journal
Abstract
Natural ester has a higher biodegradability, flash and fire points, and a greater permittivity compared to conventional mineral oils. However, natural ester also has a higher pour point, viscosity, and water content. These characteristics hamper circulation and the electrical properties of oil-filled transformer. Thus, this paper applied electromagnetic-thermal-flow coupled analysis method to predict temperature distribution inside 154kV single phase power transformer using natural ester. It modeled in the actual appearance for the tank and winding of the power transformer to improve the accuracy of analysis and applied heat flow analysis that considered hydromechanics and heat transfer at the same time. It calculated the power loss, the main cause of temperature rise, from winding and core with electromagnetic analysis then used for the heat source for the heat flow analysis. It then compared the reasonability of result of measurement analysis based on the result acquired from temperature rise test using FBG sensor on the power transformer.
Keywords
CFD analysis; Cooling performance; Natural ester; Power transformer; Temperature rise test;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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