Motivations to Assess Resource Adequacy
Resource adequacy studies explore risks at a point in the future. They are conducted by system planners and other stakeholders to inform decisions that influence supply resource availability and demand and in response to changes in the forecasted conditions that affect both. Given the impact these risks have on the reliability of the power system, resource adequacy is sometimes described as a pillar of reliability. They have also been used in traditional utility planning for decades to ensure investment in new resources, including transmission, would result in sufficient generation and transmission to serve demand over some defined future period. Utility planners continue to incorporate resource adequacy assessments to obtain planning reserve margins as a key input into long-range planning models and to assess resultant portfolios to ensure future reliability.
Decisions that influence supply resource available and demand can occur at a range of lead times. This impacts the logical constraints and inputs into studies, the types of studies, and the decisions made because of resource adequacy studies. Examples of studies include:
The purpose of this site is to bring together information to help those trying to assess resource adequacy. It draws on a wide range of work that EPRI and the industry has conducted in response to the challenges arising as power systems evolve. We welcome your feedback and suggestions to make this website increasingly useful to support you and your decisions.