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Testing the effectiveness of an experimental acoustic bat deterrent at the Maple Ridge wind farm
June 24, 2008
by Horn, Arnett, Jensen, and Kunz
This paper documents the results of an in-field test at the Maple Ridge wind energy facility in New York to determine the effectiveness of using an experimental acoustic bat deterrent to reduce bat mortality. The executive summary excerpted below suggests the results were inconclusive. Most bat experts remain unconvinced that acoustic deterrence will be a suitable mitigation approach to reduce bat fatalities at existing turbines.
California ISO integration of renewable resources report (Draft)
August, 2007
by CA-ISO, GE Energy Consulting, Pacific Northwest National Laboratory, AWS Truewind
This report details transmission and operating issues and recommendations for integrating renewable resources on the CAISO Control Grid. The CAISO discusses the gross variations in electric production from wind energy due to the intermittent nature of the resource. During periods of highest demand, the winds drop off.
Ecological impacts of wind energy development on bats: questions, research needs, and hypotheses
August 6, 2007
by Thomas H. Kunz et al
This important peer-reviewed paper written by bat expert Dr. Thomas H. Kunz et al identifies the significant risk wind turbines pose for migratory and local bat populations in the mid-Atlantic Highlands region of the United States. The projected number of annual fatalities of bats at wind energy facilities in the Highlands in the year 2020 can reach up to 111,000 bats.
The Overlooked Environmental Cost of a Wind Generation Portfolio to Serve the Need for Power
June, 2007
by Lincoln Wolverton and Raymond Bliven
The November passage of Initiative 937 adds Washington to the states with renewable portfolio standards. Wind-powered generation is a resource of choice in meeting renewable standards, and it has been highly touted for its environmental benefits. Considered in isolation, the environmental benefits of a wind resource are undoubtedly warranted. However, it is misleading to consider wind on an isolated basis—that is, outside of the context of the full power-supply portfolio that is necessary to serve load. In the context of an integrated portfolio, much of the environmental benefit disappears and may even be non-existent as compared with other resource portfolio choices. In particular, a full assessment of the impact of wind resources on the environment necessitates a look at the energy consequences of adding wind-generation to an integrated portfolio in the context of meeting load. Accounting for energy, it is likely that there is no significant environmental difference between a resource portfolio adding wind generation and one adding high-efficiency combined-cycle gas turbines. It is also likely that the wind-based portfolio results in little reduction, if any, in the need for fossil fuels and therefore little reduction in the exposure to their price swings and environmental consequences. That is, the emissions and fossil-fuel impacts of a wind-based portfolio appear little better than a non-wind-based portfolio.
Editor's Note: This paper makes a critically important point re. wind's purported environmental benefits, i.e. "...it is misleading to consider wind on an isolated basis—that is, outside of the context of the full power-supply portfolio that is necessary to serve load. In the context of an integrated portfolio, much of the environmental benefit disappears and may even be non-existent as compared with other resource portfolio choices." In short, wind's environmental benefits (if any) will be grid-specific depending on the emissions generated (if any) of the reliable generating source(s) required to back it up.
California’s Greenhouse Gas Policies: Local Solutions to a Global Problem?
March, 2007
by James Bushnell, Carla Peterman, Catherine Wolfram
California is in the process of implementing a broad portfolio of policies and regulations
aimed at reducing greenhouse gas emissions. This paper summarizes the initiatives likely
to impact the electricity generating sector. We present calculations showing that there is
a substantial risk that two of the most prominent policies could simply result in a
reshuffling, on paper, of the electricity generating resources within the West that are
dedicated to serving California. This reshuffling is different from the conventional
leakage problem as it involves no physical changes to the way electricity is generated
across regulated and unregulated regions, but is instead driven by a contractual
reshuffling of who buys power from whom. The problem is similar to an ineffective
consumer boycott. The problem is still present but less severe if more Western states
adopt carbon limitations. We also show that some of the least market-based initiatives,
the renewable portfolio standards (RPS), are likely to have the biggest near-term impact
on the carbon-intensity of electricity generation in the West. Thus the scale of RPS
programs may be limiting the potential role of non-renewable options in reducing carbon
emissions from the electricity sector.
An indictment of the Scottish Executive and regulatory incompetence and indifference......‘One is left with a clear impression of inertia, bungling, duplicity, poor communication, procrastination, obfuscation and, quite frankly, shoddy and incorrect decision-taking both in temporal and technical terms'.
Lempster Mountain Wind Power Project: Direct Pre-filed Testimony of Lisa Linowes
February 7, 2007
by Lisa Linowes
Why did you petition to become an intervenor in this matter before the NH SEC?
With New Hampshire’s recent reinstatement of PILOT agreements and legislative efforts to a Renewable Portfolio Standard, the regulatory groundwork is being laid for more wind facilities to enter the state. Yet, New Hampshire, like many states, has no consistent regulatory process in place for reviewing these projects to ensure our environmental, societal, and economic interests are protected. The work the NH SEC has agreed to undertake in reviewing this application is precedent setting. How the committee approaches its review and the weight it places on arguments presented by all sides will impact other developments in the State as pertains to renewable energy projects.
There are a multitude of conflicting issues at play when considering any wind project. My commitment to this process is to help provide, to the best of my ability, valuable and timely information that will assist the Committee in making an informed decision on this application.
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New Hampshire]
Operational Impacts of Integrating Wind Generation into Idaho Power's Existing Resource Portfolio
January, 2007
by EnerNex Corporation for Idaho Power Company
The objective of this study is to assess the costs that could be incurred by Idaho Power in modifying its operations at the Hells Canyon Complex for “integrating” or incorporating wind energy onto its system.
The intermittent and unpredictable nature of wind generation requires a utility to have generating resources available which can increase or decrease generation on short notice in order to keep the interconnected power system balanced. While hydroelectric power plants are well suited for performing this function, there are operational impacts and costs associated with operating Idaho Power hydroelectric plants in a manner that maintains reliability and facilitates integration of energy from wind generation facilities.
The issues surrounding the integration of wind generation on interconnected power systems are numerous and complex. This study provides a first step toward understanding those issues.
The intermittent and unpredictable nature of wind generation requires a utility to have generating resources available which can increase or decrease generation on short notice in order to keep the interconnected power system balanced. While hydroelectric power plants are well suited for performing this function, there are operational impacts and costs associated with operating Idaho Power hydroelectric plants in a manner that maintains reliability and facilitates integration of energy from wind generation facilities.
The issues surrounding the integration of wind generation on interconnected power systems are numerous and complex. This study provides a first step toward understanding those issues.