The time scale study of wind speed probability distribution

Across different time scales, probability distributions of wind speed are not exactly the same. Annually statistical cycle of wind speed probability distribution can not reflect wind variations in different time scales. Based on the fact that wind speed fluctuates with weather patterns, the statistical cycle of probability distribution is determined and optimal probability distribution model according to the specific time scale are selected by applying power spectrum. The example have illustrated that there are time-scale characteristics in wind speed probability distribution; wind speed probability distribution in any consecutive sub-period is similar to that in total time period; the validity of power spectrum analysis identifying the simulating time scale is confirmed.