Improvements in or relating to power systems

Abstract

In the field of power system stability there is provided a method of predicting the presence of an out-of-step condition in a power system that includes a plurality of generators, the method including the steps of: (a) obtaining a differential value (δCOIk) between a rotor angle (δk) of an individual one of the plurality of generators and an equivalent rotor angle (δCOIk) of the centre of inertia of the remainder of the plurality of generators; (b) processing the differential value (δCOIk) to determine whether the differential value (δCOIk) is predicted to reach a predefined reference threshold (δthreshold); and (c) predicting the presence of the out-of-step condition in the power system if the differential value (δCOIk) is predicted to reach the predefined reference threshold (δthreshold).

Dependencies are inferred from the claim text.