This　paper　considers　the　power　sharing　problem　of　a　grid-connected　AC　microgrid　where　the　system　parameters　of　the　dispatchable　distributed　generators　are　subject　to　arbitrarily　large　uncertainties.　The　power　sharing　problem　is　formulated　as　a　tracking　problem　of　an　interconnected　leader-follower　multiagent　system.　In　order　to　solve　this　tracking　problem,　an　internal　model　principle　based　distributed　control　framework　has　been　established.　©　2019　IEEE.