What is the default ramp rate for interchange schedules in the Eastern Interconnection?

The default ramp rate for interchange schedules in the Eastern Interconnection is set to 10 minutes. This ramp rate is crucial because it provides a standardized period over which generation resources can adjust their output in response to changes in interchange schedules. By establishing a 10-minute ramp rate, system operators can ensure that they have sufficient time to respond to variations in demand and generation while maintaining grid reliability.

This duration allows for operational flexibility and helps manage the power system's stability, particularly under varying conditions. The significance of having a default ramp rate is rooted in the need for coordinated and predictable responses from generators, which ultimately contributes to overall system reliability. This standard facilitates smoother transitions and helps prevent potential disturbances in the power system.

Therefore, the correct answer reflects established practices in the Eastern Interconnection that aid in maintaining reliability through well-defined operational protocols.