What type of flows must be reported if there is a change of ≥ 25 MW?

In the context of PJM Transmission practices, a change of ≥ 25 MW indicates significant alterations in electricity movement which could impact system reliability and operational decisions. Therefore, both generation MW flows and tie line flows must be reported for the following reasons.

Generation MW flows pertain to the amount of electricity being produced by generation resources within the PJM system. Significant changes in generation output can influence supply adequacy and affect how electricity is distributed across the grid.

Tie line flows represent the interchange of power between different control areas or utilities. Reporting these flows is vital as they help ensure that necessary coordination occurs between neighboring systems, maintain interconnection reliability, and facilitate accurate market operations.

Thus, any noteworthy change in either generation or tie line flows, quantified as ≥ 25 MW, is essential information for the PJM market and operational frameworks to maintain stability and efficiency in electricity transmission.