Reliability Calculation for Curative Congestion Management in Transmission Grids with Optical Ground Wire Dominated Communication Networks

Advancements in transmission grid control research suggest further integration of curative congestion management measures (post-fault) to either complement or potentially replace preventive measures (pre-fault) such as precautionary redispatch for both technological and economic reasons. Since curative congestion management no longer relies on a passive resilience against N-1 faults (e.g. a single line failure) in favor of increased loading, the active response mechanisms (i.e. curative measures) are crucially required to exhibit adequate reliability. A model and method for calculation of a reliability index for curative congestion management measures given a topology, a set of grid utilization cases and a plan of remedial actions per grid use case are presented. The influence of the communication network through which the required signals are transported is also taken into account. Additionally, the shared topology between energy and communication infrastructure (i.e. usage of optical ground wires) typical for a transmission system operator is utilized within the presented method. The method utilizing the model is demonstrated through a small example.