Eastern Wind Integration and Transmission Study

David Corbus - Project ManagerMatt Schuerger (Consultant)National Wind Technology CenterNRELGolden, Colorado USA303-384-6900David_Corbus@nrel.govMattSchuerger@earthlink.net

Objectives of Eastern Wind Integration and Transmission Study (EWITS)

• Evaluate the power system impacts (operating due to variability and uncertainty of wind; transmission; reliability) associated with increasing wind capacity to 20% and 30% of retail electric energy sales in the Joint Coordinated System Plan region (MISO/PJM/SPP/TVA) by 2024;

• Build upon prior wind integration studies and related technical work;

• Coordinate with Joint Coordinated System Plan (JCSP) and current regional power system study work;

• Produce meaningful, broadly supported results through a technically rigorous, inclusive study process.

Key Issues & Questions include

• What are the benefits from long distance transmission that accesses multiple wind resources that are geographically diverse?

• What are the benefits from long distance transmission that move large quantities of remote wind energy to urban markets?

• What are the cost/benefits of remote wind resources that require transmission versus lower wind speed local wind resources?

• How much does geographical diversity help reduce system variability and uncertainty?

Key Issues & Questions include

• What additional system operational impacts and costs are imposed by wind generation variability and uncertainty?

• What is the role and value of wind forecasting?

• What benefit does balancing area cooperation or consolidation bring to wind variability and uncertainty management?

• How does wind generation capacity value affect reliability?

Wind Integration Methods & Best Practices

• Capture system characteristics and response through operational simulations and modeling;

• Capture wind deployment geographic diversity through synchronized weather simulation;

• Match wind output with actual historic utility load and load forecasts;

• Use actual large wind plant power statistical data for short-term regulation and ramping;

• Examine wind variation in combination with load variations.

Wind Integration Methods & Best Practices Cont.

• Utilize wind forecasting best practices and combine wind forecast error with load forecast error;

• Examine impacts of Balancing Area consolidation and fast markets.

Key Tasks- Eastern Wind Integration & Transmission Study

• Three main tasks1) Mesoscale wind resource modeling and development of wind power plant outputs

2) Transmission Analysis (with JCSP)

3) Wind integration study

Key Tasks- Mesoscale wind resource modeling

• Develop high quality wind resource data sets for the wind integration study area (mesoscale modeling, 3 years)

Key Tasks- Eastern Wind Integration & Transmission Study

• Identify wind power generation sites for 20% & 30% wind energy scenarios– More than 300 GWs of

total wind power data generated in time series for 3 years!

– 135 GWs for 20% energy and 200 GWs for 30% energy scenario

Key Tasks- Transmission Analysis

• Develop transmission plan (coordinated with JCSP)– Run hourly

dispatch/market models

Joint Coordinated System Plan (JCSP)

• The 2007/2008 Joint Coordinated System plan will include MISO, PJM, SPP, and TVA

• The JCSP will perform a long term planning study incorporating both economic (2024) and reliability (2018) analysis of system performance for the combined four JCSP areas

• Collaboration with the parallel DOE Eastern Wind Integration & Transmission Study will provide underlying assumptions for generation scenarios

• Scheduled to be completed December 2008

Key Tasks- Eastern Wind Integration & Transmission Study

• Evaluate operating impacts and associated costs– Regulation– Load Following– Unit Commitment

• Evaluate reliability impacts (ELCC/LOLP)

Tim e (hour of day)0 4 8 12 16 20 24

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Technical Review Committee (TRC)

• A TRC will be formed with regional and national technical experts on wind generation and power systems analysis to help guide and review the study

• The TRC will review and provide feedback on key assumptions, methods, and preliminary results

• It is anticipated that the TRC will meet quarterly throughout the study

Preliminary Schedule

• Nov 07 – Feb 08 Study Development and Stakeholder input

• January 2008 Award Wind Mesoscale Modeling Contract

• February 2008 Award Wind Integration Contract

• Jan – Oct 2008 Develop Wind Data Sets

• April – Dec 2008 Develop Transmission Plan in Coordination with JCSP

• Sept 08 – May 2009 Evaluate Operating & Reliability Impacts

• June 2009 Complete Study

Your Input is Important!

• Suggestions on questions to address in study or other comments/input– Study methodology, scope, scenarios,

transmission analysis, operating impacts, • Data for study (e.g., load and wind

resource tall tower data)• Contact Dave Corbus at

David_corbus@nrel.gov (303-384-6966) or Matt Schuerger at MattSchuerger@earthlink.net (651-699-4971)