A fast method for islanding analysis in power system grids

In this paper, a new fast method for identification of islanding in power system grids is proposed. This method identifies all the possible cases of island formation, due to the loss of a single equipment (criteria N-1), by means of a single factorization of the bus-branch incidence matrix. The main features of this new method include: (i) simple implementation, (ii) high speed, (iii) absolute identification of all islanding cases of the power system under analysis and (iv) simple identification of buses that compose each island in case of island formation. The method was successfully tested on large-scale systems such as the south-southeast Brazilian system, with 810 buses / 1340 branches.