When a feeder fails

the flexible manufacture system can quickly detect and isolate faults

and restore power supply to non-fault power supply area. In this paper

two dynamic mathematic models of fault off-grid and normal grid-connected sides of three-port flexible manufacture system in dq coordinates are built. And the optimization model taking aim at the minimum load loss

the maximum feeder load balancing factor

and the minimum network loss is established for the failure situation of the feeder. The power supply allocation scheme on the non-fault side is obtained by using GAMS and the optimal distribution network power restoration scheme is derived. According to the value obtained by the power supply restoration scheme

the reference value of active power controlled by the P–Q is determined

and the dynamic response characteristic of the three-port flexible manufacture system is obtained in MATLAB/Simulink. Moreover

the practicality of the selection of the control strategy is verified.