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Published byGrant Roland Chambers Modified over 8 years ago
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Large-Scale Renewable Energy: The Top Challenges Dick Kelly Chairman, President and CEO EPRI 2008 Summer Session August 4, 2008 Dick Kelly Chairman, President and CEO EPRI 2008 Summer Session August 4, 2008
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Northern States Power Company- Minnesota Public Service Company of Colorado Southwestern Public Service Northern States Power Company- Wisconsin Xcel Energy Electric Customers 3.3 million Gas Customers 1.8 million Xcel Energy Electric Customers 3.3 million Gas Customers 1.8 million
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Xcel Energy Wind and Solar Resources Xcel Energy States Served Wind Density High Low Source: National Renewable Energy Laboratory Source: NREL, 2004
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Xcel Energy Renewable Energy Portfolio No. 1 wind provider in the nation No. 5 for solar energy No. 1 wind provider in the nation No. 5 for solar energy 7,400 MW 20202007 2,700 MW
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Challenges of Wind Energy Forecasting Intermittency Integration Cost Forecasting Intermittency Integration Cost
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Challenge No. 1: Wind Forecasting Critical information not available Site wind characteristics Turbine availability Site topography Site wind characteristics Turbine availability Site topography
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Challenge No. 2: Intermittency Total PSCo Wind Generation MW Time of Day
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Intermittency Solutions More transmission Large-scale storage A smarter grid More transmission Large-scale storage A smarter grid
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Challenge No. 3: Impact on Conventional Supply Base-load plants cycle faster and more often Higher maintenance costs Base-load plants cycle faster and more often Higher maintenance costs
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Challenge No. 4: Cost Production tax credit for wind Solar investment tax credit More certainty Production tax credit for wind Solar investment tax credit More certainty
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