In the ACE equation, what does the term 10B (FA-FS) specifically represent?

In the ACE (Area Control Error) equation, the term (10B (FA - FS)) specifically represents the frequency error contribution. Here, (FA) refers to the actual frequency of the area, while (FS) denotes the scheduled frequency. The term (B) is a constant that reflects the relationship between system frequency and the interchange of power, often associated with the system's sensitivity to frequency changes.

When there is a difference between the actual frequency and the scheduled frequency, it indicates how much the system deviates from its intended operation. This deviation affects the balance of generation and load, thus influencing the Area Control Error. The multiplication by (10B) serves to appropriately scale the frequency error contribution to ensure it is correctly incorporated into the overall ACE calculation, allowing for more effective frequency control and stability within the power system.

Understanding this term is crucial for operators, as it highlights the role of frequency in ensuring that generation and load are balanced, which is essential for maintaining system reliability.