For　a　large-scale　power　consuming　corporation,　improving　the　electric　power　management　level　of　enterprise　owned　power　plant　and　decreasing　electrical　pollutions　of　enterprise　to　regional　power　grid,　are　of　great　importance　not　only　in　decreasing　production　costs,　but　also　in　investment　and　decision-making.　In　this　paper,　the　gateway　energy　balance　between　the　corporation　and　regional　power　grid　is　chosen　as　a　new　object　of　power　scheduling,　and　a　mathematical　model　for　balance　analysis　is　built　for　power　generation　and　consumption　of　large-scale　power　consuming　corporation.　A　sufficient　and　necessary　conditions　to　satisfy　gateway　energy　balance　is　given　for　each　period　of　assessment,　and　an　improved　dynamic　programming　algorithm　is　designed　accordingly.　Using　this　algorithm,　a　mathematical　model　for　balance　analysis　which　is　large　scale　integer-planning　problem　is　converted　to　some　reduced　scale　integer-planning　problems,　thus　calculation　efficiency　increase　greatly.　Balance　analysis　problem　which　is　a　multiple　solutions　problem　can　be　solved　flexibly　by　this　algorithm,　thus,　the　algorithm　supplies　a　basement　for　large-scale　power　consuming　corporation　to　find　a　solution　with　excellent　performance.　Finally,　the　algorithms　are　tested　on　real　data,　and　prospective　results　are　obtained.　©　2009　Chin.　Soc.　for　Elec.　Eng.