For　grid-connected　or　interconnected　microgrids,　the　transition　to　an　autonomous　and　decentralized　architecture　was　hampered　by　two　perplexing　issues:　how　to　guarantee　voltage　supporting　capacity　while　fully　and　controllably　utilizing　local　power　generation,　and　how　to　switch　between　islanded　and　grid-connected　modes　flexibly　and　efficiently.　Through　a　combination　the　benefits　of　interlinking　converter　and　switch,　flexible　transfer　converters　(FTCs),　positioned　at　the　interfaces　between　the　utility　grid　and　microgrids,　are　offered　as　a　solution　in　this　study.　This　paper　proposes　a　control　method　for　FTC　and　a　universal　control　strategy　for　distributed　generations,　which　contribute　to　proper　power　flow　and　flexible　mode　transfer　in　a　communication-free　design.　They　are　convenient　to　control,　easy　to　install　based　on　existing　assets,　and　hence　promising　in　distributed　microgrid　applications.　Also,　an　FTC　for　grid-connected　microgrid　system　is　analyzed　and　designed　through　small-signal　modeling.　Finally,　comprehensive　case　studies　in　simulations　and　experiments　are　provided　to　validate　its　effectiveness.　©　2022　IEEE.