西电东送北通道碳转移特征研究

Study on carbon transfer characteristics of the North channel of China’s West-East Power Transmission

以西电东送北通道为研究对象,基于拓展的隐含碳转移分解模型,探讨西电隐含碳向东部转移的典型特征,识别关键地区、部门及其关键转移路径.结果显示:内蒙和山西是西电隐含碳转出的关键地区(占比达到85.8%),北京、河北和山东则是转入的关键地区(占比达到91.8%);隐含碳转移以间接路径为主(山西和内蒙向北京、河北、山东的间接转移量占比高达85%~98%);4个东部省市均有多个行业被识别为关键部门,其中既包含一些传统意义上的高碳行业,如化学产品、电力、热力的生产和供应、建筑等,也包含直接碳排放较低的行业,如各类设备制造业、食品和烟草等;以北京和河北的建筑业、食品和烟草业为例发现,C2、C4和C5是其承接西电隐含碳的关键路径,表明该两部门对西电的直接(C2)和间接(C4和C5)依赖度均较高.

The research object of this study was the north channel of West-to-East power transmission.Based on the extended embodied carbon transfer decomposition model,the typical characteristics of carbon transfer embodied in electricity trade from the West to the East were explored,and key regions,sectors,and critical transfer paths were identified.The results indicated that Inner Mongolia and Shanxi were identified as the key regions for the roll-out of embodied carbon in western electricity(accounting for 85.8%),while Beijing,Hebei,and Shandong were identified as the key regions for the roll-in(accounting for 91.8%).The embodied carbon primarily transferred through indirect routes(with the indirect transfer from Shanxi and Inner Mongolia to Beijing,Hebei,and Shandong accounting for a high proportion of 85%~98%).Multiple industries in the four eastern provinces and municipalities were recognized as key sectors,including both traditional high-carbon industries such as chemical products,production and supply of electricity and heat,and construction,as well as industries with low direct carbon emissions such as various equipment manufacturing and food and tobacco.Taking the construction industry and food and tobacco industry in Beijing and Hebei as examples,it was found that C2,C4,and C5were the key paths for absorbing the embodied carbon of western electricity,indicating a high level of direct(C2)and indirect(C4and C5)dependence of these two sectors on western electricity.Based on the above findings,recommendations for collaborative carbon reduction in the east and west regions were proposed.