Abstract: In order to guarantee the wind energy consumption, it’s necessary to analyze the relationship between the installed wind power capacity and the wind curtailment rate, the proportion of wind energy consumption to the total electricity consumption, during the wind power planning phase. This paper proposed a concept of maximum annual wind energy curtailment. Based on the output of the wind power and the load duration curves, a method for computing the maximum annual wind energy curtailment was proposed. With the maximum annual wind energy curtailment, an estimation formula was derived to obtain the indices like the maximum wind energy curtailment rate and the guaranteed wind energy consumption rate. And this can be seen as the reference for wind power planning and design.Finally, the effectiveness of the proposed method was verified in the case study.