For the complexity and uncertainty of the assessment indicators in insulation condition assessment of power transformer bushing

the set pair analysis is employed. First

indexes for bushing condition assessment are selected

assessment result is graded

and response strategies are worked out. Then

the weights of the assessment indexes aredetermined by using the comprehensive weighting method with combination of AHP and entropy method

mathematicalexpressions are established to describe the degree of association between evaluation criteria and state level

and acondition assessment model is built using set pair analysis. Example shows that the assessment model based on the setpair analysis and comprehensive weight can effectively reflect the insulation condition of transformer bushing

and the assessment results can be taken as a reference for transformer state-based maintenance.