If your ACE in your control area is -1500, what is the appropriate action to take?

In the context of managing the Area Control Error (ACE), a reading of -1500 indicates that the control area is experiencing an excess of generation relative to its load and scheduled interchange. To correct this imbalance, it's important to ensure there are sufficient spinning reserves, which are the capacity available for immediate use if needed. By implementing 100% spinning reserves, you prepare your system to handle any sudden fluctuations or increases in demand while also addressing the existing surplus.

Spinning reserves provide the flexibility to quickly adjust generation to match load requirements. In this case, rather than immediately increasing generation output or reducing it from non-synchronized resources, ensuring your spinning reserves are at full capacity positions your system to respond to the negative ACE condition effectively, thereby stabilizing the situation and preventing further deviations. This action is crucial for maintaining system reliability and avoiding overgeneration scenarios which could lead to other issues in system operation.