Abstract
This paper proposes a scheme to isolate cascading outages in a local region by breaking inter-regional linkages of component failures. The scheme employs a data-driven inter-regional Interaction Graph on key linkages of component failures respectively from two different operating regions, which are indicators of the propagation of outages from a local region to the rest of the system. When the triggering of a key linkage is predicted to have a high risk, a remedial action that sheds an amount of load determined by sensitivity analysis is taken to mitigate the outages and stop their propagation. The proposed scheme is validated both on the IEEE 118-bus test system and an actual power grid model.
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