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Load shedding is the last and most expensive control action against systemcollapse and blackout. Achievement of an efficient emergency control tostabilize the power system following severe disturbances, requires two keyobjectives. First, preventing of further cascading outages, i.e. saving theavailable and determinant power system elements and second, issuing propercontrol actions to stabilize the power system inside the permissible timeframe. In this paper online contingency analysis is performed to monitor secureand reliable operation of transmission lines. Load shedding locations arecontinuously updated based on loading rate/thermal limit of lines to preventtheir outage. Simulation of severe contingencies carried out on 39 bus IEEEstandard test system in DIgSILENT power-factory validates the efficiency ofproposed method.

Centralized Load Shedding Based on Thermal Limit of Transmission Lines Against Cascading Events