Based on the turbulence model, the volatility of real- time wind speed is discussed, which is composed of the average component and fluctuant component. By deriving the probability density function of fluctuant wind speed and investigating the probability density curve, we decompose the fluctuant wind power into the steady fluctuation and peak fluctuation. The steady fluctuation has the low power value and leads to great energy variation. However, the peak fluctuation whose power value is high induces the small energy fluctuation. At the end of this paper, we give a calculation example to illuminate the decomposition of wind power fluctuation. Based on the wind power decomposition, the proper suppression method and control algorithm can be developed to not only realize the real-time wind power suppression but also reduce the investment cost. Keywords-power decomposition; turbulence model; wind speed; fluctuant wind power