Many　lignite-fired　power　plant　are　built　near　the　coalfields　located　in　high　latitudes　where　the　winter　is　cold　and　long.　The　front　air　heater　is　generally　installed　to　protect　the　rotary　air　preheater　from　low-temperature　corrosion,　which　increases　the　amount　of　low　pressure　extraction　steam　reducing　the　thermal　efficiency　of　steam　cycle.　A　new　combined　power　generation　system　integrating　the　lignite　predrying　system,　the　heat　regenerative　system　and　the　front　air　heater　was　proposed　to　obtain　better　energy　matching　and　to　improve　the　system　adaptability　to　low　temperature　regions.　The　new　system　can　not　only　provide　sufficient　heat　source　for　the　lignite　dryer　and　the　front　air　heater　but　also　comprehensively　utilize　the　heat　of　the　dryer　exhaust　and　extraction　steam　under　different　ambient　temperature　conditions　and　lignite　dryness　requirements.　The　effects　of　the　lignite　drying　degree　and　the　ambient　temperature　on　power　plant　performance　were　analyzed.　The　boiler　efficiency　of　new　lignite　predrying　power　plant　is　higher　than　that　of　the　conventional　lignite-fired　power　plant　by　about　4.4%.　As　the　lignite　dryness　changes　from　low　to　high,　the　working　mode　of　new　system　is　switched　from　mode　B　to　mode　C　once　the　lignite　dryness　is　above　0.14　kg　center　dot　kg(-1)　at　an　ambient　temperature　of　-30　degrees　C.