1. College of Information Science and Engineering, Northeastern University, Shenyang 110819, China;2. State Grid Huludao Power Supply Company, Huludao 125000, China;3. State Grid Fuxin Power Supply Company, Fuxin 123000, China

The multi-energy system with electricity-gas-heat interconnection with renewable energy can realize multi-energy network interconnection, multi-energy optimization and utilization, which can effectively solve the problem of resource scarcity and energy waste. Energy hub is the key to the coupling of multi-energy system, but the existing energy hub optimization configuration does not consider the impact of system reliability. The optimal allocation of energy hub for reliability in multi-energy system has been concerned. Firstly, a new multi-energy system capacity co-optimal configuration is established for the energy hub composed of wind turbines, combined heat and power units, gas boiler, storage devices, heat storage devices and other equipment, and a hybrid integer linear programming model is proposed. The two-layer optimization model takes into account the reliability of the energy hub, and the loss of load expectation and other reliability indicators. Finally, in order to determine the planning program, the overall planning is combined with the optimization strategy and the proposed method is applied in a region simulation analysis. The obtained results show that the proposed method can improve the reliability of load supply.