How often should TOP verify the restoration plan through analysis?

The requirement for a Transmission Operator (TOP) to verify the restoration plan through analysis at least every 5 years reflects best practices in the industry to ensure that emergency procedures and plans are kept up-to-date and effective. A five-year interval allows for sufficient time to account for changes in the system, such as upgrades, changes in technology, operational experiences, and lessons learned from previous restoration efforts.

Regularly testing and analyzing the restoration plan within this timeframe ensures that any weaknesses or outdated assumptions can be identified and addressed proactively. Over time, circumstances can change, including shifts in load patterns, infrastructure updates, or alterations in regulatory requirements, making it critical to review and revise restoration plans periodically to maintain reliability and safety.

While annual and triannual verifications could be beneficial in maintaining current practices, the specific requirement of every five years strikes a balance between resource allocation and the necessity for ongoing reliability verification. Additionally, verifying the plan only during a major event lacks the proactive approach necessary for effective preparedness, as it does not allow for regular updates or testing of the restoration plan's effectiveness under varying conditions.