Elnätets klimatavtryck : Utveckling av ett klimatberäkningsverktyg för kvantifiering av växthusgasutsläpp för elnätsbolag

Sammanfattning: The electrical transmission and distribution grid play a vital role in reaching the Paris agreement by electrification of society. Although the climate impact of electricity production is well documented, the climate impact of the distribution of electricity has only been investigated in a few previous studies. Therefore, this study aims to present the carbon footprint of the distribution grid in Sweden. The study has developed a tool to map the carbon footprint by applying a case study of an electrical grid company in Sweden. The tool includes activities in the company’s value chain associated with material production, installation, usage, maintenance, transportation of the electrical grid and office activities during one year in an electrical grid company. The tool was developed in excel by implementing the theoretical framework of the Greenhouse Gas protocol and life cycle assessment. According to the guidelines of the Greenhouse Gas protocol the CO2 emissions were allocated in scope 1, scope 2 and scope 3. Scope 1 includes direct emissions controlled or owned by the company. Scope 2 are emissions from purchased heat and electricity consumed by the company, and scope 3 includes other indirect emissions from the company's activities throughout the value chain. The result shows the carbon footprint of the electrical distribution grid during 2020 was 2,02 kg CO2e per distributed MWh. The total carbon footprint of the distribution company was 54 329 ton CO2e. A majority, 97 % of the CO2e emissions originated from indirect emissions within scope 3, where capital goods stand for 76 % of the company’s total emissions followed by 12 % from fuel and energy rated activities. This result indicates the importance of including indirect emissions when analyzing the carbon footprint of a company’s value chain. Our study also indicates, in line with previous studies, that a majority of the emissions originate from the manufacturing of cables.