An important but often overlooked aspect of power system operations is the restoration of the system following a large blackout. During restoration the operating condition of the power system is usually quite different from that seen during normal operation.

The following article presents an overview of some of the unique issues that need to be considered during system restoration.

Questions:-

1. What is meant by generator black-start capability, why is it needed, and what types of generators are best at providing black-start capability?
2. Why are overvoltages a concern during the restoration of the transmission system?
3. Research a recent large power system outage, describing some of the unique aspects associated with the restoration of the power system.