Calculation method and case study of carbon emissions in multiple zones of converter station buildings

As key energy consumers in the power system, converter station buildings house substantial electrical equipment. The carbon emissions in different areas of a converter station differ significantly from those of conventional civilian buildings. Moreover, converter stations located in high-altitude, cold environments are subject to unique climatic, topographical, and other regional factors, resulting in distinct carbon emission characteristics. To address these differences, this paper develops a multi-zone carbon emission calculation model tailored to the specific building characteristics of converter stations. Using the Changdu Converter Station in Tibet as a case study, we calculate its carbon emissions across the entire lifecycle. The results indicate that the operational phase is the primary source of carbon emissions, contributing 74.52% of the total lifecycle emissions. These emissions are primarily due to the substation system, lighting, HVAC energy consumption, and sulfur hexafluoride emissions.