Reliability Assessment
SERC’s Reliability Assessment and Performance Analysis (RAPA) program provides Bulk Power System (BPS) data gathering, analysis, and investigation of events to identify BPS reliability risks in the SERC footprint per the Delegation Agreement and NERC’s
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The mission of this program
Enhance the reliability and security of the Bulk Power System by identifying and communicating emerging risks and supporting industry action through technical committee leadership, education, training, and collaboration across SERC, the Eastern Interconnection, and regional entities—aligned with NERC’s strategic goals.
How It Works
SERC staff collect and independently validate data submitted by registered entities. They conduct performance studies and collaborate with stakeholders through structured reviews. SERC also conducts independent assessments (summer, winter and long-term) of the overall reliability, performance, and adequacy of the SERC Region and reports the results in support of the NERC obligation, as well as publishing separate reports that focus on risks to the SERC footprint.
The SERC seasonal and long-term reliability assessments provide valuable information to industry leaders, planners, operators, policymakers, and regulatory bodies across the SERC Region to support the decision-making necessary to ensure the reliability of the BPS during the planning horizon.
RARR Team
The Reliability Assessment and Regional Risk (RARR) team works with subject matter experts to conduct both regional and NERC-level assessments. The RARR team works with the SERC and Engineering Committee Working Groups:
Together We:
Create Seasonal (summer and winter) and Long Term Reliability Assessments
Gain insights on resource adequacy and transmission performance
Identify of emerging risks and trends
Prepare other reports or work products on an ad hoc basis.
SERC Reports and Publications
SERC reports and publications provide insights, assessments, and guidance on bulk power system reliability, regional risks, and emerging industry trends.
Long-Term Reliability Outlook (2024–2034)
The 2024-2034 SERC Annual Long Term Reliability Assessment Report of the reliability of the SERC Bulk Power System, while identifying trends, emerging issues, and potential risks for the next ten years.
Regional Risk Analysis (2024–2026)
The 2024-2026 SERC Regional Risk Report is SERC’s independent assessment of the risks to the BES across SERC’s footprint. The report highlights the essential themes and emerging risk trends in the SERC region.
Information Summary Brochure
The Information Summary Brochure presents historical and projected seasonal peak-hour demand, annual net energy for load, capacity resource and other information for the SERC Region in summary form.
SERC Summer Reliability Assessments
The SERC Summer Assessment evaluates & reports on the expected state of reliability of all the subregions within the footprint:
SERC Winter Reliability Assessment (2024–2025)
The 2024- 2025 SERC Regional Winter Assessment evaluates and reports on the expected state of reliability of all the subregions within the SERC footprint for the upcoming winter season.
Future System Performance & Transfer Capability Studies
SERC group conduct studies to evaluate the future performance of the interconnected electric transmission systems within the SERC footprint. These studies incorporate projected loads, base transfers and generation facilities as well as the interconnected transmission network configuration that is projected for the study period. As a measure of system performance these studies assess the strength of the SERC interconnected network by determining its ability to support power transfers that are incremental to the base system transfers determined by the study groups. In some instances, SERC special studies will be performed to assess the potential reliability implications and operating concerns that require additional analysis and/ or coordination.
SERC defines its subregions based on ISO/RTO footprints or Planning Coordinator groupings.
The SERC subregions, including member companies, are as follows:
- SERC MISO-Centra –and , Midcontinent Independent System Operator (MISO).
- SERC MISO-South –, Midcontinent Independent System Operator (MISO)
- SERC PJM – Dominion Virginia Power (DVP), East Kentucky Power Cooperative (EKPC), and PJM Interconnection LLC (PJM).
- SERC Southeast –Georgia Transmission Corporation (GTC), Municipal Electric Authority of Georgia (MEAG Power), PowerSouth Energy Cooperative (PS), and Southern Company (SOCO)
- SERC Centra – Associated Electric Cooperative, Inc. (AECI), Louisville Gas & Electric and Kentucky Utilities (LG&E/KU), , Owensboro Municipal Utilities (OMUA), and Tennessee Valley Authority (TVA)
- SERC East – Cube Hydro Carolinas-Yadkin Division (YAD), Duke Energy Carolinas (DUK), Duke Energy Progress- (DEP), Dominion Energy South Carolina (DESC, SCEG), and South Carolina Public Service Authority/Santee Cooper (SCPSA) .
- SERC FL-Peninsula – City of Homestead (HST), City of Tallahassee (TAL), Duke Energy Florida (DEF), Florida Municipal Power Agency (FMPA), Florida Power & Light (FPL), Florida Reliability Coordinating Council, Inc. (FRCC), Gainesville Regional Utilities (GRU), JEA, Lakeland Electric (LAK), Orlando Utilities Commission (OUC), Seminole EleThese include:ctric Cooperative (SEC), and Tampa Electric Company (TEC)
Annual FERC 715 Data Submittal
Each transmitting utility that operates integrated transmission system facilities that are rated at or above 100 kilovolts (kV), must annually submit the Form No. 715
Annual Transmission Planning and Evaluation Report – to the Federal Energy Regulatory Commission. As a FERC-approved Regional Entity, SERC files the most current information for Parts 2, 5, and 6 of the Commission’s annual FERC Form 715 request on behalf of its members and Registered Entities.
The cover letter for this annual submittal is posted on the SERC Member Portal under the Planning Coordination Subcommittee (PLCS), Long-Term Working Group (LTWG), and the Near-Term Working Group (NTWG) folders. Registered users can access the cover letter from the committee’s documents on the SERC Member Portal.
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