Neural networks in prediction of accelerated thermal ageing effect on oil/paper insulation tensile strength

The ageing process of insulation can be monitored by several properties measurements, which need long test period to have a complete database to predict the dielectric behaviour of the HV insulation. The main purpose of insulation monitoring is to limit stoppage of electric service by giving the information on dielectric deterioration leading to a failure of HV equipment. Prediction of transformer oil/paper thermal ageing may help considerably to improve its maintenance. When the oil is in contact with paper, the BDV of oil shows increasing trend for short period.