4[1] T．E．Dy Iiacco and T．J．Kraynad．Processing by logic programming of circuit breaker and protective relaying in-formation．IEEE PASV01．88 NO．2．1969pp 171－175．
5[2] C．FVKUI and J．Kawakami An expert system for fault section estimations using information from protection re-lays and circuit breaks．IEEE PWRDV01．1 No 41986p83－90．
6[3] T．Oyama．Fault section estimation in power system using Boltzmann machine．proc ．of Second Forum on Artirficial Network Applications to power systems．Japan．1993．pp．3－8．
7[6] K．L．LoHSNg．power systems fault diangosis using petri nets．IEEE Pro Gener,Transm,Distrib No.3 pp231-236.1997.
8Janneck J W, Naedele M. Introducing Design Patterns for Petri Nets. TIK-Report No. 39, 1998.
9Ferscha A. Tutorial on Parallel and Distributed Simulation of Petri Nets. Performance Tolls' 95, Heidelberg (Germany)1995.
10Cho H J, Park J K. An Expert System for Fault Section Diagnosis of Power Systems Using Fuzzy Relations. IEEE Trans on Power Systems, 1997, 12(1):342-348.
