Cost and Emissions Implications of Coupling Wind and Solar Power

Seth Blumsack, Kelsey Richardson
2012 Smart Grid and Renewable Energy  
We assess the implications on long-run average energy production costs and emissions of CO 2 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
more » ... upled 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.
doi:10.4236/sgre.2012.34041 fatcat:v7wwmb5denepvpws27vxddawfy