What is the immediate action following a SOL or IROL violation on the transmission system?

In the event of a System Operating Limit (SOL) or Interconnection Reliability Operating Limit (IROL) violation, the immediate priority is to re-dispatch generation and, if necessary, ensure that voltage support is active. This approach aims to remedy the situation quickly by adjusting generation resources to alleviate the transmission constraint that has been violated.

Re-dispatching involves modifying the generation output levels to bring the system back into compliance. This could mean increasing output from certain generators or decreasing it from others to achieve a more balanced load-flow condition. It may also involve securing voltage support through reactive power resources, which is crucial for maintaining system reliability and overall grid stability.

This immediate action is essential to restore system reliability and prevent further operational issues, such as cascading outages or additional violations. Monitoring the situation, reporting to regulatory bodies, or reducing generator output broadly are important steps but typically follow the urgent need to address the core issue of violating operational limits directly.