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Recently, smart grids have been introduced to improve the operation of the power systems. In modern structures of power systems, different reasons such as penetration of distributed generations in power systems have prompted researchers to suggest integrated analysis of multi carrier energy systems. Considering potential advantages of the couplings between different energy carriers and utilizing intelligent technologies for monitoring and controlling of energy flow, may change energy system management in the future. In this paper, an approach for management of energy flow in distribution networks considering multiple energy carriers is presented. The proposed model is based on the new concept of energy hubs that makes possible the integrated analysis in multi carrier energy systems. Energy hub agents are employed by distribution companies to develop a reliable and optimal day-ahead dispatch in distribution system. Finally, the proposed model is implemented on a case study. Results show that the usage of potentials of energy hubs can improve the efficiency of a distribution company (Disco) to develop an optimal dispatch for day-ahead operation in distribution networks.