Resource Adequacy 

MISO’s Resource Adequacy construct provides forward transparent capacity pricing signals, recognizes congestion that limits aggregate deliverability, and complements state resource planning processes. This construct creates opportunities for all resources to supply energy based on aligned regulations and provides for efficient market outcomes across MISO’s seams. 

Resource Adequacy guiding principles help to achieve our Resource Adequacy goals.

Our resource adequacy construct follows a regular annual cycle:
Resource Adequacy Timeline (pdf)
Resource Adequacy Calendar

Learn more about the studies we conduct to facilitate resource adequacy.

Planning Resource Auction (PRA)

This voluntary annual capacity auction allows Market Participants to achieve resource adequacy more economically and its enhanced market-based design allows for greater transparency. The location-specific approach used in the PRA provides efficient price signals to encourage the appropriate resources to participate in the locations where they provide the most benefit.  This methodology creates a variety of options for Load Serving Entities (“LSEs”) to obtain the resources required to meet their Planning Reserve Margin Requirement, including Fixed Resource Adequacy Plans, bilateral transactions, self-scheduling, capacity deficiency payments, and auction purchases.

Auction Results and Summaries
EFORd Class Averages
Peak Dates and Times

Loss of Load Expectation Study

Annually we perform a Loss of Load Expectation (LOLE) study to determine the resources necessary to reliably operate the transmission system. Through the LOLE study, we determine the following parameters, which become inputs in the annual Planning Resource Auction (PRA):

  • Planning Reserve Margin on a Unforced Capacity basis (PRMR)
  • Zonal per-unit Local Reliability Requirements (LRR)
  • Capacity Import Limits (CIL)
  • Capacity Export Limits (CEL)

2015 LOLE Study
Past LOLE Studies

Module E Capacity Tracking Tool (MECT)

Market Participants submit demand forecast information, qualify resources, and transact and designate capacity to meet their Planning Reserve Margin Requirements using the MECT.  

Module E Capacity Tracking Tool
Module E Capacity Tracking Tool User’s Guide

Generator Availability and Test Data (GADs)

MISO collects generator performance data through the PowerGADS web application. It is then used to calculate the forced outage rates used in LOLE Studies and to determine each generator’s Unforced Capacity (UCAP) value and resource pooled class averages.

Access PowerGADs
PowerGADS Documentation

Seasonal and Long Term Resource Assessments

Through our Seasonal Assessments, we review projected demand and resources for the MISO footprint and assess adequacies and risks for upcoming seasons. These projections are compared to the minimum Planning Reserve Margin requirements established in Module E of MISO's Tariff.  Additionally, we actively participate in the development of the NERC assessments at the NERC Reliability Assessments Subcommittee (RAS).

We preform three resource assessments each year: Summer, Winter and Long Term (10-year) and two post-seasonal assessments, one for summer and one for winter. Post-seasonal assessments compare forecasted demand and resources with what actually occurred in that season. We also preform seasonal Coordinated Seasonal Transmission Assessments.