Effects Of Moisture Content And Temperature On The Dielectric Strength Of Transformer Insulating Oil

Ab Ghani, Sharin and Sutan Chairul, Imran and Ab Aziz, Nur Hakimah and Abu Bakar, Norazhar and Ahmad Khiar, Mohd Shahril (2019) Effects Of Moisture Content And Temperature On The Dielectric Strength Of Transformer Insulating Oil. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 63 (1). pp. 107-116. ISSN 2289-7879

Text ARFMTSV63_N1_P107_116.PDF Download (1MB)

Abstract

The primary function of insulating oils is to dissipate heat and provide electrical insulation for turn-to-turn windings in power transformers. These oils also serve as a means to monitor the health status of power transformers. At present, most transformer failures are due to the presence of moisture as well as heat, oxidation, and electrical stresses. The main objective of this research was to study the effects of moisture content and temperature on the dielectric strength of transformer insulating oil, which is known be the factors that lead to transformer failures. The effect of moisture content was investigated by varying the amount of distilled water added into the insulating oil samples from 1 mL to 5 mL with 1-mL increments. The effect of temperature was investigated by increasing the oil temperature from 40°C to 120°C with 20°C increments. The dielectric strength of each insulating oil sample was assessed by performing AC breakdown voltage tests according to the MS IEC 60156:2012 standard. With the assistance of FTIR spectra revealed that the chemical compounds of transformer insulating oil were also affected (based on absorption band) due to the presence of moisture and temperature. Based on the results, it can be concluded that moisture and temperature have a significant effect on the dielectric strength and chemical compounds of transformer insulating oil.

Item Type:	Article
Uncontrolled Keywords:	Dielectric strength, Insulating oil, Moisture, Temperature, Transformer
Divisions:	Faculty of Electrical Engineering
Depositing User:	Sabariah Ismail
Date Deposited:	03 Dec 2020 16:14
Last Modified:	03 Dec 2020 16:14
URI:	http://eprints.utem.edu.my/id/eprint/24461
Statistic Details:	View Download Statistic

Actions (login required)

View Item