The purpose of this study is to review the performance of wind power in Ontario, with particular attention to the period since the beginning of wind farm operations greater than 20 MW in the spring of 2006. This study comments on the GE Wind Power Integration Study released October 24, 2006 and hereafter referred to as the GE Study. Energy Probe’s study also provides recommendations arising from the observations of the performance results.

State Wind Activities

The U.S. map below [available via provided link] summarizes Wind Powering America's State activities, which include validated wind maps, anemometer loan programs, small wind guides, legislative briefings, and wind working groups. Click on a state to read more state-specific news. You can also use the drop down list to get to state Web pages.

Editor's Note:The US DOE's Office of Energy Efficiency and Renewable Energy (DOE-EERE) and its National Renewable Energy Laboratory (NREL) are funding (at taxpayer expense) "wind working groups" in many states. While not all "wind working groups" identify their members, many of those that do appear to be comprised of wind 'advocates' only. You can find out more about these "wind working groups" by visiting the DOE site via the link below.

The California Wind Energy Collaborative was tasked to look at barriers to new wind energy development in the state. Planning commissions in the state have developed setback standards to reduce the risk of damage or injury from fragments resulting from wind turbine rotor failures. These standards are usually based on overall turbine height. With the trend toward larger capacity, taller towers and longer blades, modern wind turbines can be "squeezed out" of parcels thus reducing the economic viability of new wind developments.

Current setback standards and their development are reviewed. The rotor failure probability is discussed and public domain statistics are reviewed. The available documentation shows rotor failure probability in the 1-in-1000 per turbine per year range. The analysis of the rotor fragment throw event is discussed in simplified terms. The range of the throw is highly dependent on the release velocity, which is a function of the turbine tip speed. The tip speed of wind turbines does not tend to increase with turbine size, thus offering possible relief to setback standards. Six analyses of rotor fragment risks were reviewed. The analyses do not particularly provide guidance for setbacks. Recommendations are made to use models from previous analyses for developing setbacks with an acceptable hazard probability.

This report (6.68 MB) is available via the link below

This indepth 142-page report looks at many dimensions of wind power including its contribution to sustainable energy; New Zealand developments to date; international trends; impacts on landscapes and communities; legal and policy frameworks; and case studies from Auckland, Wellington, and Manawatu.

Rick Webb's presentation on October 17 at the Energy Virginia conference provides a thought provoking analysis of the costs and benefits of industrial wind energy.

Industrial wind turbine farms are proposed for the towns of Perry, Covington and Warsaw, NY that will permanently alter the towns. Large turbines create strong noise levels not only from wind through the blades but largely by the turbine mechanisms themselves. To capture the wind these turbines are to be installed on hill tops around the town and thus have significant potential to create a noise nuisance. Wind turbine noise added to the prevailing ambient background sound is an important environmental consideration when siting wind turbines since they are a permanent installation and may significantly impair resident’s enjoyment of neighboring lands or even personal health. Also, relevant consideration of noise impacts and mitigation measures are a specific requirement of a NY State Environmental Quality Review procedure, required before approval of permits.

AN ORDINANCE OF THE TOWNSHIP OF TYRONE REGULATING WINDMILLS BY REQUIRING: NON-ASSIGNABLE PERMITS FOR CONSTRUCTION; INSPECTIONS; COMPLIANCE WITH ALL APPLICABLE LAWS; MAINTENANCE, REPAIR, REPLACEMENT AND REMOVAL GUIDELINES; THE POSTING OF FINANCIAL SECURITY FOR REMOVAL; SETBACKS BE ESTABLISHED OF AT LEAST 3,000 FEET FROM OCCUPIED STRUCTURES AND SETBACKS IN CERTAIN HERITAGE, HISTORICAL, WETLAND AND IMPORTANT MAMMAL AREAS; REMEDIES; PENALTIES FOR VIOLATION; AND AN EFFECTIVE DATE.

This is the report submitted by the Planning Inspector appointed by the National Assembly for Wales that dismisses the appeal by the Awe Amman Tawe quango for a wind farm on Mynydd-y-Gwrhyd.

Of particular interest are the Inspector's remarks on Landscape and Visual Impact (paragraphs 16-20 on pages 5-6) with respect to how 'developers photomontages' do not give the true visual impact of actual wind farm sites.

This report focuses on the effects of wind farms on air defense and missile warning radars and the resulting potential impact on military readiness. Its scope is limited to these specific subjects and is based on the current level of understanding regarding interactions between such defense systems and state-of-the-art wind turbines.........
The results from those flight trials documented that state-of-the-art utility-class wind turbines can have a significant impact on the operational capabilities of military air defense radar systems. The results demonstrated that the large radar cross section of a wind turbine combined with the Doppler frequency shift produced by its rotating blades can impact the ability of a radar to discriminate the wind turbine from an aircraft. Those tests also demonstrated that the wind farms have the potential to degrade target tracking capabilities as a result of shadowing and clutter effects.