A Mathematical Model for Predicting the Residual Resource of Isulation Based on the Operating Parameters

The article is devoted to the study of mathematical models that allow evaluating and predicting the residual life of already operated or newly constructed cable structures. The considered method was based on the Kuchinsky model for estimating the residual resource of cable line insulation by the level of partial discharges. A refined mathematical model that allows determining the residual life of the insulation only on the basis of 3 measurements of the power of partial discharges and the operating conditions of the insulation between experiments was proposed. The accuracy of determining the residual insulation resource for conditions close to the operation of cable lines and conditions close to laboratory studies of insulating materials was evaluated.