Research on the carbon reduction scheme of green buildings based on DC power supply technology

In response to the lack of systematic analysis methods for complex power flow, system losses and carbon emissions in green building direct current (DC) power supply systems including photovoltaics, energy storages and charging piles, which has led to limited promotion of DC system applications, this paper conducts an analysis on energy consumption, carbon emissions and economy for green buildings as well as the research on carbon reduction scheme. It proposes a method for calculating system energy consumption and carbon emission coefficients and establishes the energy consumption minimum optimization model and economic optimal model. The influence of voltage level, new energy access ratio and other factors on energy efficiency and carbon emissions are analyzed. The price of carbon emissions, electric energy and green electricity are considered in economic analysis. The study conducted a comprehensive analysis of energy efficiency, carbon emissions, and economic factors in an office building located in Zhuhai, China.