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December 5, 2025

transmission planning

ISO-NE
ISO-NE Provides More Detail on Responses to LTTP Procurement
ISO-NE published a summary of proposals submitted for its first longer-term transmission planning procurement, which is aimed at reducing transmission constraints.
AdminMonitor
Texas PUC Releases Rulemakings for Large Loads
Texas regulators proposed new rules on large load forecasting criteria and net metering following the state’s recent biennial legislative session and opened them up to public comment.
SPP
FERC Approves SPP’s Separate Winter, Summer PRMs
FERC has approved SPP’s tariff revision that establishes separate planning reserve margins for the summer and winter seasons, saying it will provide “more granularity” by recognizing the reliability differences between the two seasons.
Admin Monitor
ERCOT, PUC Refining Future Load Projections
Texas regulators have declined ERCOT’s request for an exemption from including certain loads without interconnection agreements in its forecasts until the grid operator fine tunes its methodology.
© RTO Insider 
New ERAS for SPP: Stakeholders Approve RA Studies
SPP stakeholders approved a tariff revision that creates a one-time study outside the grid operator’s normal planning process, helping load-responsible entities meet their resource adequacy requirement.
ERCOT
765-kV Lines in West Texas Inch Closer to Reality
The drive to build 765-kV lines in Texas continues to inch forward, with ERCOT and stakeholders working to provide enough information for regulators to reach a decision by May 1 on which voltage level would best meet demand.
ISO-NE
ISO-NE Details Evaluation Models for Transmission Solicitation
ISO-NE has outlined the transmission and economic models it plans to use to evaluate proposals submitted for the longer-term transmission planning process.
ERCOT
ERCOT Technical Advisory Committee Briefs: Nov. 20, 2024
ERCOT stakeholders have approved a pair of protocol changes related to transmission planning as the Texas grid operator continues to grapple with connecting incoming load to its system.
© RTO Insider LLC 
SPP Board Approves $7.65B ITP, Delays Contentious Issue
SPP’s Board of Directors approved the grid operator’s “historic” $7.65 billion package of transmission projects, but delayed a decision on a need date for two of the projects after stakeholders pushed back on staff’s staging recommendations.
The Brattle Group
Report Explores State Options for Short-term Transmission Planning
FERC Order 1920 eventually may provide a structure for long-term, interregional transmission planning, but its anticipated yearslong implementation could mean states will have to lead in planning nearer-term transmission needs, according to a report from the American Council on Renewable Energy and The Brattle Group.

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