Ester Oil Characteristics, Hot Spot and Overloading Capacity Analysis with Temperature Rise Test on Ester Oil filled Power Transformers

Harsh Hirpara
Research Fellow, M & V Patel, Dept. of Electrical Engineering, Charotar University of Science and Technology. Changa, Gujarat, India. , IN

Prof. Mihir Bhatt
Research Fellow, M & V Patel, Dept. of Electrical Engineering, Charotar University of Science and Technology. Changa, Gujarat, India. , IN

Dr. Chirag Parekh
Research Fellow, M & V Patel, Dept. of Electrical Engineering, Charotar University of Science and Technology. Changa, Gujarat, India. , IN

Keywords: Ester oils, hot Spot, overloading, temprature Rise,design improvement

Abstract

Natural ester and Synthetic ester fluids may be used in new transformer units in order to improve their performance and reliability. Designing power transformers with natural ester and synthetic ester fluids requires, however, to account for a number of significant differences in properties, characteristics, and material parameters between natural ester fluids and mineral oil in order to obtain the desired performance. In this paper hot spot and overloading capacity of ester oil filled power transformers are discussed with the temperature rise test on power transformers. Currently mineral oil filled power transformers are used commonly but it can be replaced with ester oil filled power transformers. Ester oils (Natural ester oil and synthetic ester oil) have a high viscosity as compared to mineral oil so temperature rise test results need to be analyze because its directly affect on life of power transformer. Overloading capacity also discussed in this paper with results analysis.

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