At present, it is difficult for conventional units to obtain reasonable peak-regulation compensation for large-scale wind power integration, thus affecting their peaking positivity. In response to this situation, a peak-regulation compensation allocation method aiming to promote the supply-side to better participate in wind power utilization is proposed based on K-means cluster method. Firstly, in the light of the problem of extremely large calculation when the number of units increases, K-means cluster method is introduced to classify the units, so that the peak compensations are apportioned hierarchically. Secondly, considering that Shapley value ignores the peaking motivation difference between each unit, the proposed method is modified with the realization coefficient of the peaking capacity (α) of each thermal unit, so that the compensation is allocated in accordance with it, and of both fairness and incentive. Finally, a numerical example proves the feasibility and validity of the proposed method to promote more units to participate in peak-regulation. This work is supported by National Natural Science Foundation of China (No. 51507117).