Aiming at the problem of the conventional vibration fault diagnosis technology with inconsistent result of a
hydroelectric generating unit, an information fusion method was proposed based on the improved evidence theory. In this
algorithm, the original evidence was amended by the credibility factor, and then the synthesis rule of standard evidence
theory was utilized to carry out information fusion. The results show that the proposed method can obtain any definitive
conclusion even if there is high conflict evidence in the synthesis evidence process, and may avoid the divergent
phenomenon when the consistent evidence is fused, and is suitable for the fault classification of hydroelectric generating
unit.
