Ammonia　is　a　more　stable　energy　carrier　than　hydrogen.　The　power-to-hydrogen　ammonia　synthesis　technology　route　is　important　in　realizing　the　effective　utilization　and　safe　storage　of　electric　energy.　Because　of　the　complexity　of　the　ammonia　synthesis　process　and　the　significant　differences　in　energy　characteristics　among　electricity,　hydrogen,　and　ammonia,　a　multi-agent　hybrid　time-scale　scheduling　method　for　an　electricity-hydrogen-ammonia　coupled　system　considering　energy　distribution　is　proposed.　Firstly,　an　electricity-hydrogen-ammonia　closed-loop　coupling　model　for　electrolytic　hydrogen　production　and　ammonia　synthesis　is　constructed,　and　energy　distribution　is　carried　out　for　hydrogen　production,　air　separation　for　nitrogen　production,　and　the　Haber-Bosch　ammonia　synthesis　reaction　in　the　ammonia　synthesis　process.　Secondly,　considering　the　differences　in　the　response　characteristics　of　electricity,　hydrogen,　and　ammonia　energy　flows　to　scheduling　instructions,　a　hybrid　time-scale　optimal　scheduling　framework　is　established.　A　multi-agent　collaborative　optimization　model　of　the　power　grid,　hydrogen　network,　and　ammonia　plant　is　proposed　in　the　day-ahead　stage.　The　KKT　condition　is　used　to　transform　it　into　a　single-layer　problem　for　solution.　In　the　intraday　stage,　fast-layer,　medium-speed　layer,　and　slow-layer　correction　models　for　different　agents　are　established,　respectively,　according　to　the　differences　of　energy　flow　characteristics,　and　the　above　models　are　solved　from　slow　to　fast　layer.　Finally,　simulation　analysis　is　carried　out　through　an　example　to　verify　the　effectiveness　of　the　proposed　scheduling　method.　©　2025　Power　System　Technology　Press.　All　rights　reserved.