Abstract: With the integration of combined heat and power（CHP）units,central air-conditioners and gas boilers,power,gas,and heating systems are becoming tightly linked to each other in the integrated community energy system（ICES）.An optimal hybrid power flow calculation method for ICES considering the electric distribution network reconfiguration is proposed to schedule the ICES effectively from the perspective of "source-grid-load ".Firstly,apower flow analysis model for the energy center（EC）is developed based on the energy hub model.Then,an optimal hybrid power flow calculation method considering the electric distribution network reconfiguration is proposed taking the constraints from unbalanced three-phase electric distribution network,the natural gas network,and the ECs into consideration.Numerical results indicate that the proposed method can integrate the reconfigurable topology of the electric distribution network into the optimal hybrid power flow as a flexible and dispatchable resource from the perspective of "source-grid-load",further reducing the operation cost of the ICES.