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Assessing Wind Power Cost Estimates 

Author:  | Economics, U.S.

Executive Summary

This study examines estimates of the cost of wind power capacity produced by the U.S. government and provides additional context in order to better guide policy decisions concerning wind power. The federal government has devoted substantial resources to estimate the costs of wind power capacity and the associated costs of integrating wind power into transmission grids, but the complexity of the power grid and the technical nature of most research studies make it difficult for policymakers and non-specialist interested citizens to understand just what these studies mean. Numerous reports produced by the National Renewable Energy Laboratory and the Lawrence Berkeley National Laboratory reveal a great deal about wind power costs. However, the most frequently cited numbers, concerning estimated Levelized Cost of Energy (LCOE) of wind power, do not capture all of the costs of wind power.

The federal government devotes substantially more financial resources to subsidize the production of wind power than it does to study wind power. The GAO counted over 80 separate federal programs offering economic support to wind power producers, though the largest program by a wide margin is the Production Tax Credit. State and local governments offer additional support. Government subsidies for wind power naturally raise questions concerning costs and benefits associated with the policy. Indeed, a complete policy analysis would assess both costs and benefits in a complete and consistent manner. Perhaps surprisingly given the extent of federal policy support for wind power, no systematic effort has been made to calculate the overall net benefit (or cost) of public policies supporting wind power. Given the importance of understanding the costs associated with wind power policies, this paper examines and assesses the most significant of the wind power cost estimates produced by the federal government.

In brief, the primary focus of the National Renewable Energy Laboratory report, the 2011 Cost of Wind Energy Review, is to provide an estimate of the cost to the developer of installing wind power capacity. The Lawrence Berkeley Laboratory’s Wind Technologies Market Report series seeks to provide an overview and details on trends affecting the wind power industry, including cost and performance trends. The Berkeley Lab report, like the NREL report, focuses primarily on the cost of wind power to the wind project developer. While expenses faced by wind project developers are an important element of the overall cost of wind power, addition of wind power to the power grid involves a number of other costs. If a more reasonable estimate of the installed cost of capital is $88 per MWh and operating costs are $21 per MWh, we can estimate a reasonable LCOE for wind power near $109 per MWh rather than NREL’s estimate of $72 – a more than 50 percent increase.

Such costs include the expense of transmission expansions needed to develop wind power, other grid integration expenses, and added grid reliability expenses. Both the costs to the developer and the other costs are examined in this study.

Download original document: “Assessing Wind Power Cost Estimates

This material is the work of the author(s) indicated. Any opinions expressed in it are not necessarily those of National Wind Watch.

The copyright of this material resides with the author(s). As part of its noncommercial educational effort to present the environmental, social, scientific, and economic issues of large-scale wind power development to a global audience seeking such information, National Wind Watch endeavors to observe “fair use” as provided for in section 107 of U.S. Copyright Law and similar “fair dealing” provisions of the copyright laws of other nations. Queries e-mail.

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