This is being answered as part of Matlab Answers cleanup effort:
A static curve cannot easiy be modified to apply to different wind speeds as the relationship between windspeed and power is not proportional and will depend on many details of your specific wind generator and other aspects just as altitude. You could either estimate roughtly (very rough!), by looking at theoretical max power extracted by wind speeds, or do a much deeper analysis based on your specific wind turbine. This would require creating a detailed model or contacting the manufacturer of the wind turbine you are analyzing as they should have a lot of insight into this issue.
Regards,
Joel
