How often shall each Reliability Coordinator (RC) perform a real-time assessment of IROLs?

Reliability Coordinators (RCs) are tasked with ensuring the reliable operation of the bulk electric system, which includes monitoring and assessing the Interconnection Reliability Operating Limits (IROLs). Performing a real-time assessment of IROLs every 30 minutes is crucial because it allows RCs to capture any changes in system conditions that may affect the reliability of the grid.

This frequency helps in promptly identifying and addressing potential issues that could arise from changing load patterns, generation availability, or unexpected outages. By assessing IROLs every 30 minutes, RCs can make informed decisions and take timely actions to maintain system reliability, thereby minimizing the risk of cascading failures or blackouts.

The other frequencies provided do not align with the NERC standards for IROL assessments; hourly and daily assessments would not provide the level of situational awareness required to respond effectively to dynamic changes in the electrical grid. Continuous monitoring is impractical, as it implies constant human intervention or real-time assessment tools, which is not mandated. Therefore, every 30 minutes is the appropriate and effective interval for these assessments.