SGRE  Vol.3 No.4 , November 2012
Cost and Emissions Implications of Coupling Wind and Solar Power
We assess the implications on long-run average energy production costs and emissions of CO2 and some criteria pollutants from coupling wind, solar and natural gas generation sources. We utilize five-minute meteorological data from a US location that has been estimated to have both high-quality wind and solar resources, to simulate production of a coupled generation system that produces a constant amount of electric energy. The natural gas turbine is utilized to provide fill-in energy for the coupled wind/solar system, and is compared to a base case where the gas turbine produces a constant power output. We assess the impacts on variability of coupled wind and solar over multiple time scales, and compare this variability with regional demand in a nearby load center, and find that coupling wind and solar does decrease variability of output. The cost analysis found that wind energy with gas back-up has a lower levelized cost of energy than using gas energy alone, resulting in production savings. Adding solar energy to the coupled system increases levelized cost of energy production; this cost is not made up by any reductions in emissions costs.

Cite this paper
S. Blumsack and K. Richardson, "Cost and Emissions Implications of Coupling Wind and Solar Power," Smart Grid and Renewable Energy, Vol. 3 No. 4, 2012, pp. 308-315. doi: 10.4236/sgre.2012.34041.
[1]   NREL, “Wind Technologies Market Report,” 2010.

[2]   US DOE, “20% Wind Energy by 2030: Transmission and Integration into the US Electric System,” 2008.

[3]   A. Fernandez, S. Blumsack and P. Reed, “Evaluating Wind-Following and Ecosystem Services for Hydroelectric Dams,” Center for Research in Regulated Industries Eastern Conference, Skytop, May 2011.

[4]   E. Fertig and J. Apt, “Economics of Compressed Air Energy Storage to Integrate Wind Power: A Case Study in ERCOT,” Energy Policy, Vol. 39, No. 5, 2011. pp. 23302342. doi:10.1016/j.enpol.2011.01.049

[5]   E. Hittinger, J. Whitacre and J. Apt, “Compensating for Wind Variability Using Co-Located Natural Gas Generation and Energy Storage,” Energy Systems, Vol. 1, No. 4, 2010, pp. 417-439. doi:10.1007/s12667-010-0017-2

[6]   NREL, “Wind Energy Resource Atlas of the United States,” Renewable Resource Data Center (RReDC) Home Page, 2002.

[7]   University of Oklahoma, Environmental Verification and Analysis Center.

[8]   Idaho National Laboratory, “Wind Turbine Power Curve Data,” 2012.

[9]   J. Apt, “The Spectrum of Power from Wind Turbines,” Journal of Power Sources, Vol. 18, No. 2, 2007, pp. 369-374. doi:10.1016/j.jpowsour.2007.02.077

[10]   FERC, “Form 714-Pre-Electronic Filing Data: 1993-2004,” Federal Energy Regulatory Commission, 2011.

[11]   Carnegie Mellon Electricity Industry Center, “The Smart Grid: Sorting the Reality from the Hype,” 2009.

[12]   Price data from US Energy Information Administration, 2012.

[13]   W. Katzenstein and J. Apt, “Air Emissions Due to Wind and Solar Power,” Environmental Science & Technology, Vol. 43, No. 2, 2009, pp. 253-258. doi:10.1021/es801437t

[14]   A. Mills, R. Wiser, M. Milligan and M. O’Malley, “Comment on ‘Air Emissions Due to Wind and Solar Power’,” Environmental Science and Technology, Vol. 43, No. 15, 2009, pp. 6106-6107. doi:10.1021/es900831b

[15]   S. Stoft, “Power System Economics: Designing Markets for Electricity,” Piscataway, IEEE, 2002.

[16]   Energy Information Administration, “Updated Capital Cost Estimates for Electricity Generation Plants,” 2011.