State-of-Art Review on Chemical Indicators for Monitoring the Aging Status of Oil-Immersed Transformer Paper Insulation

Chemical compounds dissolved in insulating oil, as indicators can excellently monitor the paper aging condition, which has attracted increasing interest areas of transformer condition monitoring and fault diagnosis. Because their outstanding features, such good correlation with degree polymerization cellulose aid non-destructive online monitoring, chemical have been effectively used for assessment. In this study, a comprehensive, in-depth insight into from characteristics, physico-chemical shortcomings various compounds, generation pathways mechanisms, technologies are provided. It is expected that these provide better guidance evaluation insulation performance aging. addition, latest research progress, well current challenges future prospects also outlined. This study provides theoretical basis reference fields microscopic formation mechanism, diffusion equilibrium phenomenon, state