Monitoring the progression of dibenzyl disulphide presence in transformer insulating oil at different ageing temperature via thin film sacrificial copper strips sensor

Mat Zin Boestami, Ahmad Zamani (2021) Monitoring the progression of dibenzyl disulphide presence in transformer insulating oil at different ageing temperature via thin film sacrificial copper strips sensor. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

	Text (24 Pages) Monitoring the progression of dibenzyl disulphide presence in transformer insulating oil at different ageing temperature via thin.pdf - Submitted Version Download (663kB)
	Text (Full Text) Monitoring the progression of dibenzyl disulphide presence in transformer insulating oil at different ageing temperature via thin.pdf - Submitted Version Restricted to Repository staff only Download (1MB)

Abstract

The presence of dibenzyl disulfide (DBDS) in the mineral oil is commonly used as an antioxidant to prevent the formation of oxygen in the insulating oils. However, if the operating temperature of the transformer exceed 100 °C, the chemical bond of DBDS may be breaks and caused a formation of corrosive by-product (i.e., mercaptans). The presence of corrosive by-products in transformer insulating oils may result in the production of semi-conductive copper sulphide, which may be found in both the insulating oils and on the surface of the insulating paper, depending on the circumstances. A low resistance route between the paper-wrapped copper windings is created as a result of this occurrence, which results in a short circuit defect between the turns of the winding. Previous research revealed that thin film sacrificial coppers sensors is an excellent technique to overcome the aforementioned issue. However, the capability of this sensor in detecting the presence of corrosive by-products due to the breakdown of DBDS at various temperature conditions is still vague. In order to solve this problem, an alternate technique is presented in this research, which makes use of the interpolation and extrapolation methods implemented via the MATLAB programme. The findings of this study showed that this method is capable of predicting the existence of corrosive by-products resulting from the breakdown of DBDS at a certain temperature throughout the course of its operation

Actions (login required)

View Item