The　current　paper　proposes　a　new　methodology　to　improve　the　power　quality　of　a　1200　W　PEM　fuel　cell　connected　to　the　grid.　For　this　purpose,　after　using　a　buck　converter　for　reducing　the　voltage,　an　inverter　has　been　utilized.　To　optimal　firing　of　the　controllers,　a　new　technique,　which　is　the　Amended　Penguin　Optimization　algorithm　(APOA)　is　used.　The　results　of　the　controller　based　on　the　suggested　APOA　are　put　in　comparison　with　several　other　latest　techniques.　Simulations　show　that　the　highest　efficiency　in　the　PEM　fuel　cell　is　53%　and　at　7　A　and　the　highest　power　is　1200　W　at　26　A　and　46　V.　The　results　of　simulation　validated　by　comparing　with　some　other　methodologies　and　the　results　show　that　the　proposed　APOA　with　0.01445　Steady-state　error　provides　the　minimum　error　which　indicates　that　using　the　optimized　controllers　based　on　the　proposed　APOA　provides　higher　efficiency　toward　the　others　t　under　sagging　and　swelling　conditions　in　all　terms　of　maximum　overshoot,　minimum　error,　and　the　steady-state　error　among　the　reference　voltages　and　the　point　of　common　coupling.