考虑负荷侧电能替代的区域配电网碳溯源方法

Carbon Tracing Method for Regional Distribution Networks Considering Load Side Electricity Substitution

电能替代是能源转型的主要形式之一,通过电能取代传统化石燃料的燃烧,对实现“双碳”目标具有重要意义。然而,电能替代负荷在电力系统中仍会产生碳排放。为理清电能替代前后的减碳效益,提出考虑负荷侧电能替代的区域配电网碳溯源方法。首先,基于碳排放流的迭代特性,建立负荷侧精准碳排放溯源模型。其次,结合电能替代负荷的碳排转换机理,修正碳排放因子,以解决碳排放流法将电能替代负荷碳排放分摊到各个节点的不公平问题,从而构建负荷侧电能替代模型。最后,以华东地区某区域配电网为例,验证所提方法的有效性。结果表明:该方法在计量电能替代负荷碳排放层面更具公平性,可为区域配电网减碳指标考核、节能技术的有效性评价提供科学准确的量化结果。

Electricity substitution is one of the main forms of energy transformation,which is significant for achieving the“dual carbon”goals by replacing the combustion of traditional fossil fuels with electricity.However,electricity substitution also generates carbon emissions in the power system.To clarify the carbon reduction benefits before and after electricity substitution,this paper proposes a regional carbon tracing method for load side electricity substitution in the distribution networks.Firstly,a precise carbon emission tracing model is established based on the iterative characteristic of carbon emission flow.Secondly,considering the carbon emission conversion mechanism of electricity substitution loads,carbon emission factors are adjusted to address the unfairness issue of carbon emission flow method allocating carbon emissions of electricity substitution loads to various nodes,thus constructing a load side electricity substitution model.Finally,the paper verifies the effectiveness of the method using a distribution network in the East China region as an example.The results indicate that this method provides a fairer assessment of carbon emissions from electricity substitution loads and offers scientifically accurate quantitative results for assessing carbon reduction indicators and the effectiveness of energy-saving technologies in regional distribution networks.