Home Stakeholder Engagement Issue Tracking Resource Availability and Need (RAN) - Load Modifying Resource (LMR) Accreditation & Loss of Load Expectation (LOLE) Modeling Improvements

Issue Tracking Details

Resource Availability and Need (RAN) - Load Modifying Resource (LMR) Accreditation & Loss of Load Expectation (LOLE) Modeling Improvements RASC009

Last Modified - 10/18/2021
2020 2021 2022
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4

Determine appropriate capacity credits for Load-Modifying Resources (LMRs) that more closely align with their actual availability and accounts for specific characteristics. Additionally, improve LOLE modeling assumptions to align with actual operations more closely. Align assumptions of resource adequacy processes and provide sufficient granularity for energy needs to facilitate efficient conversion of committed capacity to energy to serve near term load. 

Specific items being addressed through this issue:

- IR067 "Establish PRA Capacity Credits for Emergency-Only Resources that Better Reflect their Expected Availability and Deployment Performance" (issue has been added to RASC009)

- IMM 2017-7 (Credit Emergency Resources)

- IMM 2018-6-B (Improving Planning Assumptions)

 This issue was identified in 2018 as a Phase 2 issue of Resource Availability and Need (IR025)



Next Update







Integrated Roadmap


Advisory Committee Priority

Design & implement best practices planning
Preserve & enhance reliability
Improve market efficiency
Assure resource adequacy



MISO presented a revised LMR MCS "gap" problem statement and discussed use of MCS for LMR availability reporting.


Transitioned phase from FERC to Build with FERC accepting MISO's tariff filing effective 8/14/2020.


MISO shared stakeholder feedback and MISO's proposal for this years LOLE study which better reflects actual availability and variability of wind resources, an improvement over current wind modeling as flat annual capacity. Off-peak wind values will be incorporated into the PY2021 LOLE study and run model. The PY2021 LOLE study report is scheduled to publish in November 2020.


At the June LOLEWG meeting, MISO further discussed its updated proposal for determining the reliability value of Demand Resources call limits based on stakeholder feedback received to better capture the reliability value of DR relative to the evolving DR mix. Also MISO provided a step-by-step example of the proposed interim convolution approach and shared results from the analysis for modeling monthly wind capacities in this year’s LOLE model. Stakeholder expressed continued support on miso proposed approaches for DR reliability value review process and off-peak wind LOLE modeling improvement. Going forward, MISO plans to implement the monthly wind ELCC values derived from the proposed interim convolution analysis for this years LOLE modeling in July, and draft BPM language of DR reliability value review process in September 2020.


Updated issue timeline to reflect the 5/28/20 FERC filing and anticipated implementation schedule. The filing requests implementation for the 2022/2023 planning year. The FERC filing (Docket No. ER20-1846-000) is linked in the "Related FERC Filings" section.


Continued discussions at the May LOLEWG meeting on the review process to determine the reliability value of Demand Resources call limits and off-peak intermittent resource LOLE modeling improvement. Overall stakeholders supported MISO proposed review process using LOLE analysis to determine the reliability value of DR call limits and the development of an interim off-peak wind modeling improvement using convolution methodology to derive monthly Effective Load Carrying Capability (ELCC) values of wind for this year’s LOLE study. MISO requested feedback on both presented topics for additional refinements.


RASC presented with final LMR accreditation proposal, highlighting how it furthers the RAN objectives and priorities. MISO intends to file the proposal at FERC in mid-May along with companion proposals reviewed in the RASC meeting with an effective date for the 2021-22 Planning Year. A feedback request was opened through April 22 to take final comments on the proposal and draft Tariff language. Two related motions were opened for email vote with responses also due April 22.


RASC presented with updated proposal for LMR accreditation and LOLE modeling improvements. Additional LOLE technical modeling discussions to occur at the LOLEWG beginning in April 2020. Feedback requested on draft tariff language by March 18.


RASC presented with updated proposal for LMR accreditation and LOLE modeling improvements. Feedback requested by February 19.


The title of this issue has been changed from, "Resource Availability and Need (RAN) Improved Planning Resource Auction (PRA) inputs, include Resource Accreditation (Phase 2)" to "Resource Availability and Need (RAN) - LMR Accreditation & LOLE Modeling Improvements" as part of separating RAN into its component parts ahead of the 2021 IR Work Plan prioritization cycle.


MISO shared the final scope for RAN Phase 2. The Phase 2 scope included utilizing information gained from the Phase 1 Load Modifying Resources (LMRs) registration filing to model LMRs in the LOLE study. MISO will also begin collecting and utilizing outage data to inform future process changes. Phase 2 will not impact to 2020 Planning Resource Auction (PRA) and allows impacts of RAN Phase I outage coordination filing to be captured before changing processes. The impact of collected data will be determined as part of Phase 3 discussions with stakeholders.


MISO summarized the substantial stakeholder feedback from the February RASC meeting. MISO shared the capabilities of Strategic Energy Risk Valuation Model (SERVM) as well as the potential impacts of changes to how planned outages are modeled in LOLE studies. MISO also discussed current must offer exceptions and provided an updated draft work plan. Feedback was requested on planned outage modeling and must offer exceptions.


MISO summarized stakeholder feedback form the January RASC meeting related to RAN Phases 2. MISO shared an initial Phase 2 Proposal which included: 1) Utilizing information gained from the Phase 1 LMR registration to model LMRs in the LOLE study and 2) Investigating modifications to capacity accreditation based on the ability to resolve resource risk. MISO requested feedback on the initial Phase 2 Proposal.


MISO summarized stakeholder feedback on specific Phase 2/3 questions and solution prioritization. MISO provided stakeholders with initial set of Phase 2 solution prioritization and provided draft work plan. MISO will continue discussion on solution prioritization at the February 2019 RASC meeting. (Phase 2)


The Steering Committee (SC) formerly assigned Resource Availability and Need (RAN) Improved Planning Resource Auction (PRA) inputs, include Resource Accreditation as an issue to the RASC on November 15, 2018. MISO will continue discussion with stakeholders and provide a draft work plan at the January 2019 RASC meeting. (Phase 2)