ONLINE MONITORING OF MOISTURE CONTENT IN TRANSFORMER OIL

Abstract

Transformer insulation is provided mainly through mineral oil and Kraft paper. The DP (degree of polymerization) value is an indicator of mechanical stability of Kraft paper insulation. The aging process depends on the transformer’s operation temperature and is accelerated by presence of moisture and acids in the insulation system. The DP value is a good indication of the aging status of transformer but it cannot be done while transformer is in service, the degradation of solid insulation can be correlate and heavily influenced by temperature and moisture which results cellulose destruction. We can monitor the moisture and temperature with the help of sensors and microcontrollers.