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Interconnectivity is an important development trend of future energy revolution. A more precise planning model is needed to enhance the interaction of multiple energy sources. In this paper, a joint planning model of active distribution network and transportation network including electricity, gas, heat, and traffic loads is proposed. The main highlights of this model are summarized below. Firstly, this issue puts forward a novel mixed user equilibrium mathematical model nesting fast charging station user equilibrium considering the charging fee, charging time, and queuing time of various charging facilities. Secondly, this work constructs a new generation of suburban integrated energy system (SIES) model considering electricity, biogas, gas, and heat energy, and fully explores the significant role of biogas digestors in a SIES. Thirdly, because the proposed model is a mixed integer nonlinear problem, the piecewise linear method, big-M method, and second-order cone relaxation are used to deal with the nonlinear constraints. Finally, a SIES based on the IEEE 33-node distribution network and a 12-node traffic network is designed for case studies. The results revealed that the new equilibrium will decrease vehicle charging cost strongly up to 19.58%. Moreover, biogas digesters are conducive to new energy consumption, resulting in the proportion of power supply from the upper-level grid falling to 30.87%.

Coupled Planning of Suburban Integrated Energy System With Electric-Biogas-Traffic Considering Fast Charging Station Equalization