2012 by Taylor & Francis Group, LLC. While most of the protective system designs are made around individual components, system-wide disturbances in power systems are becoming a frequent and challenging problem for the electric utilities. The occurrence of major disturbances in power systems requires coordinated protection and control actions to stop the system degradation, restore the normal state, and minimize the impact of the disturbance. Local protection systems are often not capable of protecting the overall system, which may be affected by the disturbance. Among the phenomena, which create the power system, disturbances are various types of system instability, overloads, and power system cascading [1-5].
