During an unplanned outage or a Fault Clearance. The Power system will move into the stable point after transient oscillations as per Theory. Now, how the T&D Companies manage the reliability of the downstream load depends on the criticality of the Faulted Line or Transformer and Redundant path availability. In case a very critical feeder tripped thereby reducing the total power availability on the Load Side, then T&D Companies will resort to have a Load Shedding Scheme to maintain the Stability of the System.
Several Load management schemes are available in the Market from various OEMS like Siemens, Honeywell, ABB etc.
Computerised load dispatch centers are providing, reliable, efficient and economical operation of power system, using online load frequency control and load for casting offline software's....