What NERC standard focuses on the coordination of the power system?

The focus of Reliability Standard TOP-001 is on the coordination of the power system, which is crucial for ensuring the reliable operation of the electric grid. This standard establishes requirements for transmission operators to effectively monitor and assess the reliability of their transmission systems and coordinate their operations with other entities.

TOP-001 emphasizes the responsibilities of transmission operators to maintain system reliability through effective communication and coordination with other operators and control centers. This includes the sharing of operational data and ensuring that all entities involved are informed and working together towards maintaining system integrity.

The other standards listed relate to different aspects of reliability and security within the electric power industry. While some of them may encompass elements that contribute indirectly to system coordination, TOP-001 is specifically tailored to ensure that transmission operations are synchronized and that reliability protocols are adhered to, making it the correct answer.