What is the maximum allowable time for system restoration after a disturbance recovery period?

The maximum allowable time for system restoration after a disturbance recovery period is 90 minutes. This timeframe is established to ensure that the electric grid and associated systems can return to normal operation without compromising reliability. The importance of a defined restoration time is to mitigate the risks associated with extended outages, which can lead to more severe system failures, safety issues, or cascading outages.

During this 90-minute window, operators coordinate actions necessary to stabilize the system, restore affected services, and ensure that sufficient generation resources are online to meet demand. Staying within this timeframe is critical not only for operational efficiency but also for maintaining public trust in the reliability of the electric power system.

In summary, the focus on a maximum restoration time like 90 minutes reflects the industry's commitment to safeguarding reliability and stability during post-disturbance recovery efforts.