What is the minimum amount of MWs that would trigger an event report to NERC if load is shed to maintain continuity of the BES?

The minimum amount of megawatts (MW) that triggers an event report to the North American Electric Reliability Corporation (NERC) when load is shed to maintain the continuity of the Bulk Electric System (BES) is indeed 100 MW. This threshold is significant because it represents a substantial disruption in power supply that could have reliability implications for the broader grid.

When a utility or transmission operator sheds load, typically during unexpected outages or system instability, it's crucial for NERC to be informed about such events, especially when they exceed this specific threshold. Reporting such incidents helps ensure that regulators and stakeholders can analyze the causes and potential broader impacts on grid reliability, allowing for preventative measures or improvements to be made in operational practices.

Maintaining a consistent and reliable energy supply is vital for the stability of the electricity system, and such reporting mechanisms are in place to monitor and manage these critical components effectively. This is why the establishment of a 100 MW threshold is not just arbitrary; rather, it's based on historical data and analysis that indicate the significance of load shedding at this level.