The union decomposition is an effective approach to resolve the important problem of Petri net ＂station explosion＂ which bars the development of Petri net in application . But it is still difficult to decompose a net . This paper analyses the charactor of the fault diagnosis Petri net, and puts forward a decomposition method for a no-ring, multi-place Petri net which is used for the power fault diagnosis. Meanwhile, the diagnosis algocithm based on the union decomposition Petri net is also proposed. The proposed method is proved to be effective ,feasible a...
