The Degree of Polymerization in a Prediction Model of Insulating Paper and the Remaining Life of Power Transformers

The aging of power transformers causes several defects and damages in the insulating system, especially paper. degradation paper generates dissolved gases oil, which are measured by gas chromatography used as an indicator insulation status. state can be identified based on degree polymerization (DP) measurement. In some cases, when measurement DP is difficult, estimating accomplished through gathering information about testing parameters, such (DGA), breakdown voltage (BDV), oil interfacial tension (IF), acidity (ACI), moisture content (MC), color (OC), dielectric loss (Tan δ), furans concentration specifically (2-furfuraldhyde (FA)). statistical tools (correlation multiple linear regression), 131 transformer samples, to build a relation linking one or more previous parameters identify status percentage remaining life transformer. results indicated that it difficult mathematical model relate between variables, except with FA, where trend FA obvious than other variables. empirical formula compute was developed gave promising transformers.