This paper revisits models of cascading failures in the transmission system of the power grid.
It has been recently shownthat since power flows are governed by the laws of physics, these
models significantly differ from epidemic/percolationbased models. Yet, while some
numerical results have been recently obtained based on these models, there is a need to
investigate the sensitivity of the results to various parameters and to evaluate the models'
accuracy. In this paper, through numerical experiments with real grid data, we study the …