Abstract: In the case of renewable energy with high-permeability access to the distribution network,with the gradual opening of the energy market,the integrated energy suppliers have become a new type of interest subject in the integrated energy market.Thus,a bi-level programming model is proposed,which takes the maximization of net income of regional energy suppliers and the minimization of the total cost of integrated energy management center into account.The upper level of the bi-level programming model is to plan the capacity for each equipment in the integrated energy management center,while the lower level is to determine the electricity and gas buying strategies in the center.The model also takes the renewable energy output control,reactive power compensation switching,on-load transformer regulation of the three active management measures and the timing of renewable energy output into account.The cat swarm optimization algorithm and improved genetic algorithm are used to solve the proposed model,and the rationality of the proposed model is verified by the IEEE 33-node distribution system.