205 / 2018-09-14 15:10:39

Test and Estimate Method for Moisture Content of Oil-immersed Transformer

oil-paper insulation,moisture equilibrium,aging effects,optimized model

Moisture is one of the most important factors that affect the insulation status of oil-paper insulation in transformers. In engineering, the moisture content of insulation paper is mainly obtained indirectly by using the moisture equilibrium curves and moisture calculating models of oil-paper insulation. The aging status of insulation paper has obvious effects on its moisture absorption property. In this paper, Fessler model, the widely used moisture calculating model in engineering and related studies, was optimized by considering the effects of aging status. Moreover, the optimized model was verified by comparing the calculated results of optimized model with experimental results. The optimized model is the basis of further studies and usage in engineering.