What is the role of Dynamic Reserve in PJM Transmission?

The role of Dynamic Reserve in PJM Transmission primarily centers on its function to support system reliability during instances of frequency deviations. Dynamic Reserve refers to reserve capacity that can be called upon quickly to maintain the reliability of the electricity supply. In the event of sudden changes in demand or unexpected outages of generation resources, this reserve can be deployed to correct frequency imbalances, ensuring that the grid remains stable and operates within required frequency parameters.

Maintaining frequency is crucial for the overall health of the electricity grid; frequencies that are too high or too low can lead to equipment failures or outages. As such, Dynamic Reserve plays a key role in responding to real-time fluctuations within the grid, providing a safety net that can act promptly to mitigate instability.

When considering the other options, optimizing system costs involves more strategic planning and long-term management of resources rather than the immediate response mechanism of Dynamic Reserve. Auxiliary services are related to a broader range of functions that support reliability but do not specifically focus on direct responses to frequency deviations. Storing energy for future use pertains to energy storage solutions, which is distinct from the immediate active response required in dynamic reserve scenarios.