NERC System Operator (SOS) Reliability Practice Test

The correct choice emphasizes the responsibility of the Sending and Receiving Balancing Authorities in coordinating the Interchange Schedule for a transaction that involves a high voltage DC (HVDC) tie.

Balancing Authorities are entities that ensure the balance between supply and demand on their respective systems. When an HVDC tie is involved, these authorities execute critical tasks to maintain system reliability and integrity. They monitor the generation and load to ensure that the energy transmitted through the HVDC tie aligns with the scheduled interchange and that the flow is accounted for properly.

By coordinating the interchange schedule, the Sending and Receiving Balancing Authorities ensure that all operational parameters are properly synchronized, minimizing the risk of congestion or instability. This includes adjusting their generation resources and demand forecasts based on the scheduled interchange.

Other options involve different entities whose primary responsibilities do not extend to the direct coordination of interchange schedules specifically for high voltage DC ties. For instance, the Transmission Service Providers primarily handle arrangements related to transmission capacity and not real-time operational coordination. The Transmission Operators manage the physical movement of power but may not be directly accountable for the interchange schedule between two balancing authorities.