Interval Based Network Operation Respecting N-1 Security Criterion

Abstract — Rising penetration of renewable energy sources in present day transmission systems requires increased attention to network security. Existing computation tools in power system operations evaluate individual scenarios for power injection and network configuration but do not fully consider nearby regions in the operating space. Such tools may lead to market transactions, preventive actions, or corrective actions that are nominally efficient but poor in general. In this paper, the interval based ISI method is reformulated to a security oriented form potentially applicable in energy management systems. The presented results include an algorithm defined within a tractable optimization framework that computes maximal power injection sets containing power injection profiles that are necessarily secure in terms of physical constraints and the N-1 security criterion. The method is tested on the IEEE 14 bus test system. I