Network-Layer Protection Schemes Against Stealth Attacks on State Estimators in Power Systems
The power system state estimator is an important application used to calculate optimal power flows, to maintain the system in a secure state, and to detect faulty equipment. Its importance in the operation of the smart grid is expected to increase, and therefore its security is an important concern. Based on a realistic model of the communication infrastructure used to deliver measurement data from the substations to the state estimator, in this paper the authors investigate the vulnerability of the power system state estimator to attacks performed against the communication infrastructure. They define security metrics that quantify the importance of individual substations and the cost of attacking individual measurements.