Reliability Analysis of Power System Based on Generalized Stochastic Petri Nets

Hidden failures in protection schemes, the traditional N - 1 security criterion and the introduction of the electricity market are usually major causes in the recent wide area blackouts. In the present work, we address the reliability analysis of power systems using the Generalized Stochastic Petri Nets (GSPN). The proposed modeling approach considers not only the most common failures of power system elements, i.e. short-circuit, breakdown, lightning, but also the improper operations of protection schemes. In addition, the dependency on the system operating conditions has been introduced according to the GSPN formalism (marking-dependency), which allows for the propagation of harmful events. At last, well-known techniques such as reachability graph might be used to retrieve the reliability information of the system under investigation.