In　order　to　eliminate　the　impact　of　harmonic　and　unbalanced　faults　on　the　point　of　common　coupling　(PCC)　and　improve　the　fault　ride-Through　(FRT)　capability　of　microgrid.　In　this　paper,　the　cascaded　H-bridge　flexible　fault　current　limiter　(CHB-FFCL)　is　used　to　compensate　the　PCC　voltage　and　realize　the　functions　of　voltage　regulation,　current　limiting　and　active　power　filtering　(APF).　Under　the　multi　synchronous　reference　coordinate　system,　the　dq-Axis　DC　components　of　electrical　quantities　can　be　extracted　without　phase-locked　loop　(PLL)　by　giving　the　rotation　angular　frequency　of　the　coordinate　system,　which　overcomes　the　frequency　oscillation　problem　of　the　traditional　PLL.　An　improved　harmonic　voltage　frequency　dividing　control　strategy　of　CHB-FFCL　based　on　amplitude　feedback　is　proposed,　which　reduces　the　number　of　control　loops　of　the　traditional　double　loop　control　strategy　and　is　beneficial　to　the　parameter　tuning　and　design　of　the　controller.　The　simulation　on　MATLAB/Simulink　verifies　the　effectiveness　of　the　proposed　scheme　and　its　ability　to　improve　FRT　of　microgrid　under　complex　grid　conditions.　©　2022　IEEE.