Electric Power Systems Contingencies Analysis by Paraconsistent Logic Application

In this paper we present paraconsistent logic application at electric power system contingency analysis with risks identification. Para-consistent Logic is a non-classic logic whose foundations allow for the treatment of contradictions without invalidating the conclusions through algorithms named PANs - para-consistent analysis nodes. In the equations of the PANs are calculated signals representing restrictions, risks and configurations of electric power systems networks. The "pre- Fault state" represented by the resulting evidence degree from PAN is evaluated together with the "post-fault" information in a contingency evaluation. In that way the occurrence type and their parameters are classified by PANet with the purpose of offering an optimized re-establishment sequence to the power system. This method is being validated through off-line tests applied at the Eletropaulo-Eletricidade de Sao Paulo, an electric power distribution utility company of Sao Paulo state, Brazil, which has a distribution network and a model substation of medium range.