A generator's capability for system restoration purposes is determined by what?

The capability for system restoration of a generator is fundamentally assessed through periodic blackstart testing. Blackstart capability refers to a generator's ability to restart without the aid of an external power source after a system-wide blackout. This process is critical for ensuring that the power system can be restored effectively and efficiently following a major outage.

Periodic blackstart testing evaluates how well the generator can perform this function under various conditions. Such testing involves simulating blackout scenarios and verifying that the generator can start independently, reaching stable operational conditions and supplying power to the grid or to other auxiliary services. This testing ensures that generators are not only theoretically capable but also practically ready to participate in system restoration when needed.

While the capability curve provides vital information about the generator's operational limits and performance characteristics, it does not specifically address the practical aspects of restoring the system post-blackout. Similarly, FERC audits and NERC surveys are important for regulatory compliance and assessing various aspects of power system reliability, but they do not directly determine a generator's restoration capabilities. In this context, periodic blackstart testing is the most relevant and direct method of assessing a generator's ability to aid in system restoration.