Wind energy opponents sometimes claim that using wind energy harms electric grid reliability, or costs too much to integrate into our current grid, or does not provide valuable power. The following documents from utilities and others tackle these issues in detail.

• Colorado Public Utility Commission's Xcel Wind Decision National Renewable Energy Laboratory (Jun 2001)
  http://www.eere.energy.gov/windandhydro/windpoweringamerica/pdfs/xcel_wind_decision.pdf
  
• The Effects of Integrating Wind Power on Transmission System Planning, Reliability and Operations, GE Power Systems Engineering Consulting (Mar 2004)
  http://www.nyserda.org/publications/wind_integration_report.pdf
  
• The Impacts of Increased Levels of Wind Penetration on the Electric System of the Republic of Ireland and Northern Ireland: Final Report, Garrad Hassan (Feb 2003)
  http://www.ucc.ie/ucc/depts/civil/staff/brian/CER03024.pdf
• Integrated Resource Plan 2004 Pacificorp (Jan 2005)
  http://www.pacificorp.com/File/File47422.pdf
  
• Wind Power Impacts on Electric Power System Operating Costs: Summary and Perspective on Work to Date, Utility Wind Interest Group (Mar 2004)
  http://www.uwig.org/windpower2004.pdf
• Some Common Misconceptions about Wind Power National Renewable Energy Laboratory (May 2003)
  http://www.eere.energy.gov/windandhydro/windpoweringamerica/pdfs/wpa/34600_misconceptions.pdf
  
• Wind Integration Study Minnesota Department of Commerce and Xcel Energy. (Sep 2004)
  http://www.uwig.org/operatingimpacts.html