Wind Power Integration and Transmission: Addressing Some Common Misconceptions Governors Wind Energy Coalition Transmission Briefing November 3, 2011 Washington, DC Ed DeMeo Renewable Energy Consulting Services, Inc. Technical Advisor: Governors Wind Energy Coalition (EPRI Renewable Energy Programs, 1976-1998) [email protected]650 327 3090
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Wind Power Integration and Transmission: Addressing Some Common Misconceptions Governors Wind Energy Coalition Transmission Briefing November 3, 2011 Washington,
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Wind Power Integration and Transmission:Addressing Some Common Misconceptions
Governors Wind Energy Coalition Transmission BriefingNovember 3, 2011 Washington, DC
Ed DeMeoRenewable Energy Consulting Services, Inc.
Technical Advisor: Governors Wind Energy Coalition(EPRI Renewable Energy Programs, 1976-1998)
Plant efficiency reduced slightly when power deviates 10 MW from rated level
Careful studies to date indicate actual emissions reductions will be 90-to-95% of ideal reductions
More thorough evaluations are underway
Does Wind Power Really Reduce Emissions?
“The study implies that small, short-term emission increases associated with ramping result in significant increases in the total emissions. This is simply wrong. Since 2007, we have added hundreds of megawatts of wind generation, and our overall emissions have declined. In 2009, wind produced 10 percent of the energy delivered to our customers. Without wind, that electricity would have been generated by gas or coal, creating greater total emissions.” Frank Prager, VP Environmental Policy, Xcel EnergyDenver Post, May 28, 2010
Does Wind Power Really Reduce Emissions?
20% Wind Evaluation estimates flat-lined CO2 emissions from the electric sector
Substantial wedge of needed reduction
Climate-change deniers doubt the earth is warming; Berkeley Earth Surface Temperature study – carried out
by skeptics – has crushed this myth
Significant Water Use Savings
Cumulatively, the 20% Wind Scenario would avoid the consumption of 4 trillion gallons of water through 2030.
The 20% Wind Scenario cuts electric sector water consumption by 17% in 2030.
Extraction of shale gas and tar-sands oil requires large amounts of water
Xcel Energy Today: Minnesota and Colorado
Wind now exceeds 10% of retail energy generation
Revising previously approved system expansion plans – with PUC approval
Replacing planned coal plants with wind and gas plants; emissions and costs are key factors driving this strategy
Learning how to deal with wind’s natural characteristics
Actual utility experience is the strongest response to those who perpetuate the myths!
Summary
Wind energy is affordable now
Integration costs are minor; increased power-system flexibility and wind forecasting will reduce them
Wind tax incentives help to compensate for existing subsidies for conventional energy
Transmission is affordable and provides broad benefits
Wind reduces emissions of pollutants and greenhouse gases and saves water
Utilities are relying on wind for substantial and growing portions of their generation portfolio
www.uwig.org
Wind Integration State of the Art:IEEE Power & Energy Magazines
November-December 2005, 2007, 2009, 2011
References
U.S. Department of Energy. 2008. 20% Wind Energy by 2030. DOE/GO-102008-2567. Washington, DC. Available at http://www.20percentwind.org
Pfund and Healey. 2011. What Would Jefferson Do? The Historical Role of Federal Subsidies in Shaping America’s Energy Future. DBL Investors. Available at http://www.dblinvestors.com/documents/What-Would-Jefferson-Do-_Final_September2011.pdf
Hand et al. 2008. Power System Modeling of 20% Wind-Generated Electricity by 2030. National Renewable Energy Laboratory. Conference Paper NREL/CP-500-42794. Golden, CO. Available at http://www.nrel.gov/docs/fy08osti/42794.pdf National Renewable Energy Laboratory. 2010. Eastern Wind Integration and Transmission Study. NREL/SR-550-47078. Golden, Colorado. Available at http://www.nrel.gov/wind/systemsintegration/ewits.html
Berkeley Earth Temperature Study. Available at http://berkeleyearth.org/