ELECTROMECHANICAL DISTANCES FOR IDENTIFYING CONTINGENCY PROPAGATION IN TRANSIENT STABILITY STUDIES

A method is proposed for devising measures able to assess the “propagation” of severe disturbances. It is based on the definition of candidate electromechanical distances, expressed in terms of essentially static parameters of the system, on their assessment by means of evaluation criteria, finally on the selection and combination of the more appropriate among them. The present paper attempts to open the way of this new method, with the ultimate objective to apply it to the broader problem of system size reduction. Note that this as well as the question of power system modelling are beyond the scope of the paper; care is however taken to preserve the method's generality to cope with any model, and its ability to adjust the resulting measures so as to encompass the predominant parameters.