Investigation of ageing process in paper-oil insulation with visible range

Abstract

The aging of paper-oil insulation is determined by changing the value of its degree of polymerization. Used today ways to assess the degree of polymerization of paper-oil insulation of high voltage equipment has the following disadvantages: labor input and long-time produce a result, the high cost analysis, environmental pressures, the complexity and high cost of automation. We propose a method of estimating the degree of polymerization of the paper insulation implemented by measuring the reflectance of paper in the visible wavelength range, taking into account the effect of transformer oil.