Introduction  This paper presents an optimal expansion planning model for an energy hub with multiple energy systems.

  Method  Energy hub represented a coupling among various energy infrastructures for supplying electricity, natural gas and heating loads. Combined heat and power (CHP) and natural gas furnaces were considered within the energy hub to convert energy into other forms. The multiple energy system planning problem would optimally determine appropriate investment candidates for generating units, transmission lines, natural gas furnaces, and CHPs that satisfy electricity and heating load forecasts and hub system constraints.

  Result  The system performances associated with reliability, energy efficiency, and emission matrices is evaluated for the identified planning schedules.

  Conclusion  Numerical simulations demonstrate the effectiveness of the proposed multiple energy system expansion planning approach based on energy hub.