What kind of resources are included in Part G of the SSR?

Part G of the System Support Resources (SSR) in the context of PJM refers specifically to resources that are not currently fully operational but may still offer essential support under specific conditions. In this case, the correct answer relates to units that are unable to run at maximum capacity for an extended period, specifically over 72 hours. This classification is crucial as it acknowledges the operational limitations of these units while still recognizing their potential role in maintaining system reliability and providing energy during critical periods, even if their output is constrained.

These resources are often necessary for grid stability, especially during times of high demand or when other resources may be offline. By including units that have limitations on their capacity to operate continuously at full strength, the SSR ensures a more flexible approach to managing energy supply, allowing for a diversity of support mechanisms during critical operating times. This helps in planning and operational strategies to maintain the balance between supply and demand within the grid.