The power generation and transmission systems (as well as other complex systems) can be represented from a graph. It is necessary to optimize resources regarded to the protection systems of such networks, as well as, the minimization of happened losses of great accidents. The so called probabilistic risk assessment indicates fragilities in the system in terms of installed protection and inherent factors to the components. This paper presents a model of analysis of the risks of the power system, attributing distributions of imperfections to each component or set of components, beyond considering the model of propagation of such imperfections.
risk assessment; equipment failures; electric networks
