In order to improve accommodation of wind power, a new analysis method is proposed considering wind power output limited during light load. In the presented method, the output of wind power is restricted and curtailment of wind power is permitted when peak regulation is difficult. Comparing with the conventional analysis method, the proposed method is more practical and is able to improve greatly the accommodated capacity of wind power. In addition, the method can be applied flexibly to calculate the accommodation of wind power under kinds of economic operated indexes. Finally, by means of the calculated results of case study, the accuracy of the presented method and accommodated capacity for wind power are confirmed. The method is significant for improving accommodated capacity of wind power and instructing power planning.