Cascading-failure-resilient interconnection for interdependent power grid - Optical network

The interdependence between communication networks, e.g., an optical backbone network, and power grids is a critical issue to take into account when designing operating both systems. In fact, failures in one network may cause further the other vice versa. This because nodes (i.e., generators, loads or interchange nodes) are controlled managed by telecommunication equipment, which, turn, rely on electricity grid for their supply. Therefore, occurring limited portion of can cascade multiple times these two robust “interdependency network” consisting interconnections networks) needed. paper investigates problem resilient interconnection against interdependent cascading-failures - networks. We formalize, using Integer Linear Program, new Power Grid Optical Network Interconnection (PGON-I), which consists that cascading failures, i.e., avoids/reduces cascade. For this problem, we derive analytically upper lower bounds number links ensure resilience initiated from single node-failure. Starting analytical model, develop heuristic algorithm solve large instances problem. Our results show higher difference more needed