Power System Steady State Security Analysis Using Vector Processing Computers

Power system steady state security analysis is one of many power system computation problems that requires very high speed to be of use. Whether used in system reliability calculations or in on line security analysis, users wish to know what overloads and voltage limit violations will result for a very large list of possible equipment outages. The length of the list of outages is in fact the major problem in security analysis since it usually includes at least each individual piece of equipment taken one at a time and a large number of cases with multiple outages. The use of contingency selection and screening has opened the way to reducing this burden, but the fact still remains that a very large number of individual cases must be run to satisfy the need to be sure that no cases have gone unchecked. The efforts described in this paper have extended the computational speed with which this can be accomplished and opens the way for the implementation of very high performance security analysis codes.