Aiming at solving the problem of energy waste and poor economic benefits caused by mismatch of energy supply and demand in distributed energy system(DES)

an optimization model of the DES installation capacity and operation strategy is built for multi-form buildings in this paper

where the optimal comprehensive performance parameter is taken as the objective function and the hourly energy balance is chosen as constraint.Furthermore

the model and algorithm are applied to an actual case study of the DES in one financial center

where the optimal installation capacity is 15.22 MW when satisfying the energy demand of terminal users.Compared with the conventional energy system

the annual total cost of the DES can be reduced by 17.4 % and the primary energy ratio can be increased by 21.1 %. The established model of installation capacity and operation strategy can provide theoretical basis for design and operation of the DES.