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Consumption of fossil fuels and their scarcity of resources as a global challenge has posed a major problem for the energy sector. To this end, four sub-systems including oxy-fuel production and combustion, hydrogen production, power generation and liquefaction and storage of carbon dioxide were integrated to obtain a new power generation system. The proposed system was evaluated based on techno-economic analyses and multi-objective optimization. Syngas was used as a fuel where syngas was obtained through biomass gasification. Linde-Hampson liquefaction system was used to facilitate storage and transport of carbon dioxide. Solid Oxide Electrolyzer was employed to save the extra energy of system efficiently and supercritical carbon dioxide cycle was used because it is environmentally friendly. The results showed that the obtained values of the levelized cost of electricity are 0.6019 $/kWh, 0.7117 …