Effect of Ambient Conditions on Performance of Power Transformers

Volume 10 Issue 2 October - December 2016

Research Paper

Effect of Ambient Conditions on Performance of Power Transformers

Chilaka Ranga*, Ashwani Kumar Chandel**, Rajeevan Chandel***

* Research Scholar, Department of Electrical Engineering, National Institute of Technology, Hamirpur, Himachal Pradesh, India.

** Professor, Department of Electrical Engineering, National Institute of Technology, Hamirpur, Himachal Pradesh, India.

*** Professor, Department of Electronics and Communication Engineering, National Institute of Technology, Hamirpur, Himachal Pradesh, India.

Ranga, C., Chandel, A.K., and Chandel, R. (2016). Effect of Ambient Conditions on Performance of Power Transformers. i-manager’s Journal on Electrical Engineering, 10(2), 1-8. https://doi.org/10.26634/jee.10.2.8321

Abstract

Effect of ambient conditions on oil impregnated paper insulation is detrimental for an extensive performance of power transformers. In this paper, effect of load, moisture and ambient temperature on the dielectric properties of transformers have been investigated using a multi-regression technique. The proposed technique incorporates the data obtained from several diagnostic tests of transformers. Oil samples collected from different transformers owned by Himachal Pradesh State Electricity Board, India have been tested and analyzed using the proposed method. It has been observed from the analysis that the effect of moisture content on the transformers’ performance is much higher than the effect of load and ambient conditions. The present analysis estimates the oil temperature as per the expected load and ambient temperatures. It facilitates the operating schedule for transformers to improve their service life time.