Abstract:

To effectively evaluate transformer insulation aging, the evaluation model based on fuzzy mathematics and D-S evidence theory was indicated. By the method of no power failure detecting transformer insulation status, four parameters were measured. These four parameters were fuzzed through membership function into four independent evidence bodies. And diagnostic result was calculated by the powerful uncertain information process ability of D-S evidence theory. Multiple allocations proved the effectiveness of this model.

Key words:

power transformer, D-S evidence theory, fuzzy mathematics, insulation aging