What part of the ACE equation will contribute to Inadvertent Interchange if the Balancing Authority enters the wrong power schedule?

The correct answer highlights that both the Interchange portion and the frequency portion can contribute to Inadvertent Interchange when a Balancing Authority enters an incorrect power schedule.

When a Balancing Authority submits an erroneous power schedule, it can create discrepancies in both the expected interchange between Balancing Authorities and the actual system frequency. The ACE (Area Control Error) equation connects these elements, as it is defined as the difference between scheduled and actual interchange, adjusted for frequency bias.

If the power schedule is incorrect, the interchange portion of the ACE will reflect an inaccurate expected flow of power. Consequently, this can lead to unintentional exchanges of energy, categorized as Inadvertent Interchange. Moreover, any associated changes in frequency due to this mismanagement can exacerbate the issue, as frequency deviations are also factored into the ACE calculation.

Thus, both aspects of the ACE equation—interchange and frequency—are essential in understanding how incorrect power schedules can lead to complications within the electricity grid, specifically through Inadvertent Interchange.