Cogeneration plant and cogeneration method

The invention relates to a co-generation plant and method, comprising: a gas turbine (GT), a heat recovery steam generator (HRSG), a steam turbine (STT), a cooler/condenser (CCON), a division module (DMOD) at a division point (DIV), by means of which downstream said heat recovery steam generator (HRSG) said combustion gas (CG) is cooled and dehumidified in the cooler/condenser (CCON) and then divided into a first combustion gas flow (CB1) and a second combustion gas flow (CB2), a second condenser (CON2) receiving said second combustion gas flow (CB2) to separate contained carbon dioxide (CO2) from contained water by condensation of the water, a heater (CHEAT), a compressor (COMP), receiving said first combustion gas flow (CB1), which is heated, compressed and partly extracted to by-pass the combustor (COMB) for cooling of the gas turbine (GT) before it enter the combustor (COMB) and mix with said flow of oxygen (02) and fuel (F) to be burned in said gas turbine (GT).