Condition evaluation of distribution equipment based on conjoint analysis

Conjoint analysis is a new evaluation method. It has many advantages, but it has been seldom applied in the field of power equipment condition evaluation. This paper applies conjoint analysis method in the condition evaluation of distribution equipment, and proposes corresponding solutions to the specific problems appeared in implementation process: by refining the rule of consistency check in conjoint analysis, an optimization model with the goal of minimizing the adjustment to the original scores without violating the logical consistency constraint has been built; in view of the problem that too few levels to do accurate evaluation, the concept of membership degree is introduced in the transition process of index scores to levels to improve the evaluation sensitivity to the minor changes of index, making the results more accurate; under the presume of making sure that survey cards have reasonable redundancy, the linear correlation cards are removed in orthogonal experiment to reduce the cards number to improve the efficiency of investigation. The example analysis results show that those proposed solutions are correct and effective.