Active distribution network provides an effective way for the access of distribution renewable energy with high penetration. Aiming at the power fluctuation problem caused by the inherent intermittence

fluctuation

and randomness of wind energy

ESS（Energy Storage System） is introduced into distribution network as a controllable load

and a dispatch model of distribution network with wind energy and ESS is built

which takes the ESS output as its variable. Smoothing the hybrid gross output and hybrid net output are respectively taken as the objectives to effectively avoid the impact of renewable energy access on distribution network. An improved firefly algorithm is proposed to solve the optimal dispatch problem of active distribution network. Simulation example verifies the effectiveness of the proposed model and algorithm.