The fuzzy ISODATA algorithm has some disad-vantages in the transformer fault diagnosis based on DGA

such as

lack basis of dividing the mode space

and not considering the reflection to the sensitivities of various gases to fault and so on. Some aspects of revision are proposed

i.e.

a weight vector of index is introduced to describe the reflection to the sensitivities of different gases to fault; the cluster centers are split and merged after each iterative cal-culation. Three groups of transformer fault data are analyzed by using the revised algorithm

and the result shows that it has higher accuracy.