Transmission Studies and Reports 

Previous MTEP Cycles

Effective planning for transmission and generation needs balances system reliability, market efficiency, and state and federal energy policies. The MISO Transmission Expansion Plan (MTEP) documents transmission scenarios and reveals related opportunities or weaknesses. 



Forecasted LMPs by MTEP Future

MISO generates detailed Locational Marginal Pricing (LMP) forecasts through PROMOD IV® for a set of MTEP futures on an annual basis.  LMP represents the marginal cost of supplying the next increment of electric demand at a specific location (node) on the transmission grid, considering the physical and operational limitations of generation and transmission facilities.  It reflects how the marginal price may vary at different times and locations based on transmission congestion and losses on the system and consists of a Marginal energy component, Marginal congestion component and Marginal Loss Component.

 MTEP Futures

Capacity for Intermittent Wind Resources

To calculate the unforced capacity rating – an input to the LOLE study, we collect historical settlement data for wind CPnodes to calculate the Effective Load Carrying Capability (ELCC) for each node. Prior to 2013, the wind capacity report was included in each year's LOLE Study. 

2015 Wind Capacity Report
2014 Wind Capacity Report
2013 Wind Capacity Report

Candidate MVP Portfolio Analysis

The goal of the Candidate MVP Portfolio Analysis is to define a consolidated transmission plan to address regional needs, public policy goals and increase stakeholder value across the MISO footprint.  A robust, regional transmission system will expand competition within our markets and increase access to least cost generation, regardless of fuel type

Learn more about the Candidate MVP Portfolio Analysis
Learn more about Expansion Planning

 Energy Storage Study

The Energy Storage Study facilitates the exploration of the reliability, market and planning benefits energy storage products may offer. By testing several hypotheses around compressed air, battery and pumped energy storage, we seek to determine the economic potential and determined when energy storage would provide benefits to MISO markets.

Energy Storage Study Materials

Regional Generation Outlet Study (RGOS)

Wind shows significant promise for filling energy supply gaps and meeting state renewable energy mandates for the Midwest. The Regional Generation Outlet Study (RGOS) evaluates economic, environmental, policy and other implication of long-term, renewable energy transmission.

Regional Generation Outlet Study (RGOS)

Joint Coordinated System Plan (JCSP)

The Joint Coordinated System Plan 2008 (JCSP’08) analysis offers a conceptual regional transmission and generation system plan for a large portion of the Eastern Interconnection in the United States. Most of the major transmission operators in the Eastern Interconnection contributed to the development of the JCSP.

JCSP Report Volume 1
JCSP Report Volume 2

Loss of Load Expectation (LOLE) Study

LOLE study is performed annually to set the minimum Planning Reserve Margin (PRM) for the upcoming planning year and provide a nine (9) year PRM forecast. LOLE studies consider multiple risk factors including planned maintenance outages, unplanned or forced outages, load forecast uncertainty and transmission congestion.

2017 LOLE Study
2016 LOLE Study
2015 LOLE Study
2014 LOLE Study
2013 LOLE Study
2012 LOLE Study
2011 LOLE Study
2010 LOLE Study
2009 LOLE Study

Wind Movies

For the Eastern Wind Integration Study, the National Renewable Energy Laboratory contracted with AWS-Truewind to create a dataset for the 10-minute simulated wind output values for more than 1,300 sites across the Eastern Interconnect based on historic weather information for 2004, 2005 and 2006.  MISO took this information to produce the Wind Movies which present an hourly representation of the wind outputs across the Eastern Interconnect on a per unit basis.

To manage the file size, the movies are in monthly increments and are available in two resolution sizes.


North Carolina, PJM and MISO Joint Interregional Study

Together with North Carolina Transmission Planning Collaborative (NCTPC) and PJM, we performed a joint inter-regional study to address a request from the North Carolina Utilities Commission (NCUC).

The NCUC requested a study to learn whether or not the external generation resources which cleared in the PJM 2016/2017 base residual capacity auction (BRA) are expected to exacerbate loop flows on the transmission grid in North Carolina due to the  unprecedented amount of generation resources (7,663 MW) located outside the PJM transmission system.  Specifically, the NCUC requested the study to determine whether the planned imports could cause Duke Energy Carolinas (DEC) and Duke Energy Progress (DEP) to alter their joint generation dispatch in a manner that increases costs and whether the planned imports would reduce the reliability of the North Carolina transmission grid.

Two separate and distinct analyses comprise this joint interregional study: a reliability analysis to address the NCUC’s grid reliability question and an economic analysis to address the NCUC’s joint generation dispatch question.

The North Carolina Transmission Planning Collaborative (NCTPC) consists of the major electric load-serving entities of North Carolina, including Duke Energy Carolinas, Duke Energy Progress, ElectriCities of NC (municipals), and the North Carolina Electric Membership Corporation (cooperatives).

View the Report
Access the MISO-PJM Joint and Common Market Website