The traditional dispatch mode of the power system cannot meet the requirement of multi-energy system dispatch in the background of development of Energy Internet and deep coupling among multi-energy networks. The high penetration of electric vehicles(EVs)is both opportunity and challenge for the multi-energy system to make flexible dispatch strategy. Based on the background

this paper develops a coordinated optimal dispatch model for electricity-gas-heat multi-energy system considering high penetration of EVs. The fuzzy optimization theory is adopted to deal with the total charge demand of EVs and the uncertainty of the wind power output. The model is proposed to minimize the total energy supply cost and the pollutant emission when the constraints of power flow

natural gas system

energy demand of energy hub and EV charge demand can be satisfied. The interior point method is chosen to solve the model. Finally

the typical 11-node multi-energy system is taken as an example

and the dispatch strategies and benefits under different EV charge/discharge modes and energy center structures are analyzed. The dispatch results under different EV numbers and confidence levels are compared

which shows that the proposed coordinated dispatch can improve the economic efficiency of the power system.