What triggers a Primary Reserve Alert?

A Primary Reserve Alert is triggered when the forecasted reserve is lower than the requirements. This situation indicates that the available reserves to respond to unexpected events, such as sudden demand increases or generator outages, are inadequate to maintain system reliability.

In power systems, reserves are crucial for ensuring that supply can meet demand and for addressing contingencies. When the forecast indicates that these reserves will fall below the necessary threshold, it signals operators to take actions to either reduce the demand, increase generation output, or deploy demand response strategies to align with the required reserve levels. The timely recognition of this condition is vital for maintaining the stability of the grid and preventing potential outages or reliability issues.

The other options, while related to system conditions, pertain to specific operational states rather than the conditions directly associated with triggering the Primary Reserve Alert.