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Western Wind and Solar Integration Study

Western Wind and Solar Integration Study. Debbie Lew National Renewable Energy Laboratory SWAT/CCPG Meeting Aug 22, 2007. Overview. To support multi-state interests in understanding the operating and cost impacts due to the variability and uncertainty of wind and solar power on the grid.

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Western Wind and Solar Integration Study

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  1. Western Wind and Solar Integration Study Debbie Lew National Renewable Energy Laboratory SWAT/CCPG Meeting Aug 22, 2007

  2. Overview To support multi-state interests in understanding the operating and cost impacts due to the variability and uncertainty of wind and solar power on the grid • How can utilities manage the incremental variability and uncertainty of wind and solar? • Do geographically diverse wind/solar resources reduce variability and increase transmission utilization? • How do local wind/solar resources compare to out-of-state resources in terms of load correlation or cost? • How can hydro help with wind/solar integration? • The role and value of wind forecasting • Can balancing area cooperation help manage the variability? • How do wind and solar contribute to reliability and capacity value?

  3. Tasks • Data Collection • Wind and solar mesoscale modeling • Utility load, generator, transmission data • Preliminary Analysis • Extensive statistical analysis with various options for wind/solar sites and transmission • Scenario Development • In-state vs out-of-state resources • Geographically diverse resources • Mega projects • Best correlated with load • Run Scenarios • Examine costs due to regulation, load following, unit commitment • “Dives” to investigate issues such as Hoover • Examine mitigation strategies/options • Determine contributions to reliability and capacity value • Draft and Final Report

  4. Current Status • Held Stakeholder Meeting • Utilities working on data collection • Subcontracts for wind meso-scale modeling and utility simulation and analysis being processed. Solar will be next. • Updates and information posted on WestConnect website • Next stakeholder meeting mid-2008

  5. Kick-off Stakeholder Meeting • Held at NREL 5/23/07 with 56 participants • Revisions to study scope • Study footprint to include most of WestConnect • Statistical analysis for 10, 20, 30% wind penetration (by energy), with results determining what levels to conduct simulations • Timing doesn’t allow this to feed into Virtual Control Area project • Intra-hour variability will be analyzed with a validated spreadsheet approach instead of PSLF runs • Costs of renewables or benefits from renewables - will separate out variability/uncertainty costs from market competition effects • Transmission scenarios will be rough (crayon level) • Establish hydro task force • Study completion to be pushed back to accommodate revisions

  6. Revised Study Footprint Control areas: APS El Paso Nevada Power PNM Sierra Pacific SRP Tristate Tucson Xcel WAPA

  7. Wind and Solar Mesoscale Modeling • Model wind power output for 300 GW of wind farms in Western Interconnection • 10 min averages, 2 km grid, 80-100m hub height • Solar data - 2006 needs to be modeled • Hourly averages, 10 km grid • Mesomodeling data will be made publicly available when completed • We are requesting measurements of wind and solar data to validate our mesomodeling

  8. Schedule

  9. For more information • Debbie Lew • NREL • 303-384-7037 • debra_lew@nrel.gov • http://westconnect.com/init_wwis.php

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