Resource adequacy is the process of ensuring there are enough electricity resources available to meet customer demand when electricity is needed most.
Electric systems must balance supply and demand every second of every day. Resource adequacy helps ensure utilities, regulators, and grid operators have sufficient generation, energy storage, demand response resources, and other capacity available to maintain reliable electric service during both normal operations and periods of system stress.
As electricity demand continues to evolve, resource adequacy has become a critical component of long-term electric grid planning and energy reliability.
Maintaining resource adequacy helps support a reliable electric grid and reduces the risk of electricity shortages during periods of high demand.
Several factors can affect the availability of electricity resources:
Resource adequacy planning helps stakeholders identify future risks and develop solutions before reliability challenges occur.
Without adequate resources, electric systems may face increased operational risks during periods of peak electricity demand.
Resource adequacy and electric reliability are closely connected.
Electric Reliability
Electric reliability focuses on operating the grid safely and securely in real time while maintaining the continuous flow of electricity to homes and businesses.
Resource Adequacy
Resource adequacy focuses on whether enough electricity resources will be available in the future to meet projected customer demand.
Together, these efforts help ensure the electric grid remains reliable today while preparing for future energy needs.
Resource adequacy is a shared responsibility across the electric industry.
State regulators, utilities, load-serving entities, generation owners, market participants, and regional grid operators all play important roles in planning for future electricity needs.
Within the MISO region, states and load-serving entities maintain responsibility for resource planning and investment decisions. MISO supports those decisions by providing regional assessments, market mechanisms, planning information, and reliability analysis
MISO supports resource adequacy by helping stakeholders understand future reliability risks and resource needs across the region.
Key responsibilities include:
MISO's resource adequacy framework helps provide visibility into future system conditions while supporting regional reliability.
Planning Resource Auction (PRA)
The Planning Resource Auction helps demonstrate whether sufficient resources are available across the MISO region and provides a mechanism for market participants to buy and sell capacity. The auction supports regional planning and provides information about future resource availability.
Regional Resource Assessment (RRA)
The Regional Resource Assessment provides a forward-looking view of expected changes in the region's resource mix. These assessments help utilities, regulators, and stakeholders better understand future capacity trends and potential reliability risks.
Seasonal Resource Assessments
MISO performs seasonal assessments to evaluate resource adequacy conditions before upcoming operating seasons. These assessments help identify potential risks and support preparedness efforts throughout the year.
Resource Accreditation
Resource accreditation measures how much capacity a resource can reasonably be expected to contribute during periods of greatest system need. This process helps ensure planning assumptions reflect actual resource performance and availability.
What does resource adequacy mean?
Resource adequacy means having enough available electricity resources to meet customer demand, including during periods of peak usage and system stress.
Why is resource adequacy important?
Resource adequacy helps support electric reliability by ensuring sufficient resources are available to serve customers during changing system conditions.
Is resource adequacy the same as electric reliability?
No. Reliability focuses on operating the electric grid safely in real time. Resource adequacy focuses on ensuring enough resources will be available to meet future electricity demand.
What role does MISO play in resource adequacy?
MISO supports resource adequacy through assessments, market administration, planning activities, reliability analysis, and stakeholder coordination.
What is the Planning Resource Auction?
The Planning Resource Auction is a regional capacity auction administered by MISO that helps demonstrate whether sufficient resources are available to meet expected demand.
The electric industry continues to experience significant change.
Growing electricity demand, evolving resource portfolios, increasing electrification, changing weather patterns, and the integration of new technologies all influence how resource adequacy is evaluated.
Meeting these challenges requires ongoing coordination among utilities, regulators, policymakers, market participants, and regional transmission organizations. MISO works closely with stakeholders to provide data, risk assessments, and planning information that support these efforts.