Abstract：To address the challenges of fuzzy carbon emission accounting boundaries and the limited diversity

in the utilization of hydrogen energy within large-scale new energy hydrogen production systems，a low-carbon

economic scheduling model for an integrated energy system encompassing electro-thermal-hydrogen energy was

proposed，considering the whole life cycle of carbon emissions. Firstly，a liquid storage carbon capture system and

a dynamic gas doping system were designed to enable flexible carbon capture operations and diversify hydrogen

energy applications. Secondly，employing life cycle theory，the life cycle energy chain method was adopted to

comprehensively account for the carbon emissions throughout the whole energy chain lifecycle. Also considered the

carbon offset effect from equipment recycling，and introduced corrected carbon emission coefficients into the ladder carbon trading mechanism，guiding the system's carbon emissions. Finally，the optimized scheduling model for the electro-thermal-hydrogen integrated energy system was constructed，with the objective of minimizing the total operating costs. The results demonstrate that the proposed low carbon economic scheduling model significantly enhances the system's low-carbon economic efficiency.

      Key words：electro-thermal-hydrogen；integrated energy system（IES）；whole life cycle；liquid storage carbon capture；dynamic hydrogen doping；ladder carbon trading