Carbon emission modeling and emission reduction potential assessment of electricity infrastructure

Tang Baojun; Xu Peiyun; Yu Fang; Wang Xiangyu

Abstract：As one of the important electricity infrastructures of the new energy system,the steady development of the ultra-high voltage(UHV)power grid has effectively promoted the consumption of clean energy and cross-regional electricity substitution.However,there is still a need to quantify the carbon reduction benefits and potential of the UHV grid itself,so as to promote the low-carbon development of the power industry in a more comprehensive manner.Firstly,taking the UHV alternating current(AC)project as an example,the carbon emission measurement and optimization model is constructed from the dimensions of direct and indirect carbon emission,respectively.It applies the LCA model,LEAP model,electric energy substitution theory,and energy clean substitution theory.Then,the model is applied to a specific case of UHV AC transmission and transformation project.On the basis of analyzing the supply and demand of electricity in the province where the project is located,the carbon emission accounting and emission reduction potential assessment of the real case is carried out.Finally,based on the study of the"grid"in"source-grid-load-storage",some suggestions for the low-carbon development of overall electricity infrastructure are put forward:China's electricity infrastructure construction link has a large space for emission reduction,and the synergistic pulling effect of the industrial chain and supply chain should be utilized to achieve the overall emission reduction;the power generation structure at the delivery end should be optimized;and the"source-grid-load-storage"low-carbon performance assessment system should be established to enhance the overall low-carbon performance of the power grid.