Study on Life Management of Power Transformer

This paper presents the general knowledge, theory and methodology of life management that used in electric power transformer. The paper also discusses the basic failure theory and method to establish failure model of power transformer. Insulation ageing is a problem due to dielectric, chemical, thermal and electro-mechanic stresses, which is highly depending on operational conditions. Life management of power transformer should include research of fault diagnostic, monitor methods and insulation reclamation to extend life, and establish life model of power transformer. Life management of power transformer should not only consider the fault model, quantitative assessment of the relevant remnant withstands strengths of transformers and operational stresses, but also establish the maintenance standard for power transformer. Key Word: Life Management; Power Transformer; Rough Set Theory; Fuzzy Logic; Neural Networks; Reliability