Which of the following is NOT a NERC disturbance reporting requirement for a 1000 MW system?

The indication that voltage excursion of 5% is not a NERC disturbance reporting requirement for a 1000 MW system highlights a specific aspect of NERC's regulatory framework. While NERC does emphasize the importance of voltage levels and stability in the power system, a 5% voltage deviation doesn't directly trigger a mandatory report under the same protocols as load shedding, UnderFrequency Load Shedding (UFLS), or violations of Interconnection Requirements Operating Limits (IROLs).

In essence, NERC disturbance reporting focuses on significant events that could compromise the reliability of the grid, such as substantial load shedding measures (100 MW or more), UFLS actions necessary to protect system integrity, and serious operational violations like IROL violations, which indicate severe operational challenges. Although voltage deviations are monitored and managed for system health, they do not constitute a mandatory reporting event unless they become part of a larger disturbance affecting system reliability or performance. Thus, the choice pertaining to the 5% voltage excursion correctly identifies it as outside the specific reporting requirements established by NERC for a system of this capacity.