Understanding Single Resource vs. Aggregated Value in IRR Groups
Explore the discussion on allowing single HRL values in IRR groups for enhanced generation stabilization and support. Learn about ERCOT's update on Self-Limiting Facility protocols and upcoming considerations for IRR groups at the IBRWG meeting.
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HRL of a single resource vs an aggregated value of a defined IRR Group ERCOT Staff IBRWG 3/14/2025
ERCOT Update Recap of the issue: At the Feb 21,2025 IBRWG meeting Acciona Energy proposed allowing single HRL value when the IRR units are grouped instead of separate HRLs for each unit to increase the stabilization of generation injection and reactive support. IRR unit within a group receives SCED Base Points at the unit level and the compliance (GREDP, Base Point deviation) is evaluated at the IRR group level ERCOT Update: ERCOT Nodal Protocols Section 3.8.7 Self Limiting Facility (introduced recently by NPRR026) may be relevant to this scenario. This section addresses facilities consisting of one or more resources behind a single point of interconnection (POI), where the combined injection/withdrawal capability exceeds the maximum power ratings at the POI as established in the interconnection agreement. 2 PUBLIC
ERCOT Update The designated Self-Limiting Facility is required to operate in such a way that the power injection or withdrawal at the POI remains withing agreed-upon limits. The rules established in this protocol section govern how the Self- Limiting Facilities must operate to maintain compliance with their interconnection agreements. ERCOT will continue discussions and also reach out to the entity to get the site-specific details to evaluate the applicability of this protocol section to the IRR groups and bring further details at the upcoming IBRWG meeting. 3 PUBLIC
DISCUSSION 4 PUBLIC
