Abstract: Aiming at the problem that traditional current-limiting methods can not adapt to different types of short-circuit faults,a new current-limiting method based on proportional resonance（PR） control and filter inductance current is proposed.Firstly,the distributed generation（DG） converter in the microgrid is taken as the research object,and the PR controller is used in both voltage and current loops of the DG converter.Secondly,the relationship between the reference value of the filter inductor current and the output current and voltage of the DG converter is derived in detail,the relationship shows that the output current of the DG converter can follow the filter inductor current by adjusting the parameters of the control system and the filter capacitor.Then,the fault current can be limited by changing the reference value of the filter inductor current when the output phase current of the DG converter is larger than the threshold value（i.e.when the fault occurs）.Finally,the simulation results show that the new current limiting method can limit the fault current to about twice the rated current,and has nothing to do with the different fault resistances,fault type and fault occurrence time.Compared with PI control,PR control adopted in the new current limiting method has smaller current peak value and faster response speed.