MULTI-CONTINGENCY PREPROCESSING FOR SECURITY ASSESSMENT USING PHYSICAL CONCEPTS AND CQR WITH CLASSIFICATIONS

A new method for preprocessing the outage lists for an Expert System f or Security Assessment of power systems is presented in this paper. Th is method uses disturbing capability, structure & location classificat ions and CQR with Classifications (CQRC). Because this method avoids t he traditional enumerative methods such as Automatic Contingency Selec tion, the number of contingencies can be reduced very sharply with heu ristic common sense and rules of CQRC before numerical computing. So t he double contingency problem or extremely heavy cost of computing can be tackled successfully. The proposed method along with an Automatic Contingency Analysis and Classification technique can assess the class ified contingencies with basic physical concepts and without network s implification, minimize the number of missing harmful contingencies ef ficiently and give a clear accurate output.