A new strategy of capacity configuration of energy storage system is proposed for making full use of wind power in the preliminary black start (BS). First, maximum power fluctuation which the preliminary restoration system could balance is got, which is regarded as the limitation objective of the wind power output. Then, the limitation objective is treated as the main evidence for determining the power of the energy storage station and the limitation objective and the start-up time of the typical thermal units auxiliary system are regarded as the main evidence of determining the capacity of energy storage station, which ensure that wind power output fluctuation is limited in the limitation objective during the period when the energy storage station plays a role in balancing fluctuation. At last, wind-storage model is established in PSCAD/EMTDC and it is verified that the configured energy storage power station could ensure the wind farm integrate into the preliminary BS safely and smoothly by simulation. The proposed capacity configuration strategy of energy storage system is indicated for other new energies which would be integrated into the BS. This work is supported by National Natural Science Foundation of China (No. 51677071) and Fundamental Research Funds for the Central Universities (No. 2016XS95).