What is the maximum time for a Transmission Operator to return the system within limits after an IROL violation?

A Transmission Operator must return the system within limits after an IROL (Interconnection Reliability Operating Limit) violation within 30 minutes. This time frame is critical because IROLs are defined as operating limits that, if violated, could lead to cascading failures or significant reliability concerns across the electrical grid. The 30-minute requirement is driven by the need to maintain the reliability of the transmission system and to prevent potential adverse impacts on the broader interconnected system.

Meeting this timeline is essential so that operators can quickly mitigate issues and restore normal operations, thereby ensuring the continued stability and reliability of the electric grid. The regulations and guidelines set forth by NERC emphasize the importance of prompt action in response to any IROL violations, illustrating the critical nature of this timeframe in the context of electric grid management and reliability.