考虑LCA能源链与碳交易机制的综合能源系统低碳经济运行及能效分析

Low Carbon Economy Operation and Energy Efficiency Analysis of Integrated Energy Systems Considering LCA Energy Chain and Carbon Trading Mechanism

随着新能源利用技术的不断推进,为充分发挥综合能源系统(integrated energy systems,IES)的经济–环境效益,低碳发展理念可以引导IES由高排放能源消耗转向低排放能源消耗。但是由于IES具有能源多样性和不同能源链迁移转化过程的复杂性,无法准确分析IES的总碳排放,进而难以使IES参与碳交易市场。研究针对含气电热负荷需求的IES,运用生命周期分析(lifecycleassessment,LCA)方法,分析IES中不同能源链(energy chain,EC)迁移转化过程产生的碳排放,求得归一计量后的碳排放系数。将其与碳交易机制模型联合引入IES经济运行的决策指标中。在保证系统负荷需求的同时,将IES分为离网型与并网型2种场景,对比讨论不同碳交易价格对系统运行状态、运行成本、碳排放量的影响,并通过改进能效分析方法对2种场景下IES的节能情况和综合能源利用率进行定量分析。结果表明,合理的规划碳市场可以有效促进IES低碳化发展。该文也为IES低碳化建模以及碳排放计量提供了分析方法。

With the continuous advancement of new energy utilization technologies,in order to give full play to the economic-environmental benefits of integrated energy systems(IES),the low-carbon development concept can lead IES to lower-emission energy consumption.However,due to the complexity of IES’s energy diversity and different energy chain migration and transformation processes,it is impossible to accurately analyze the total carbon emissions of IES,which makes it difficult for IES to participate in the carbon trading market.In this study,the IES of gas-containing electric heating load demand was analyzed by life cycle assessment(LCA)method to analyze the carbon emissions generated by the energy conversion process of different energy chains(EC)in IES,and the carbon emission coefficients after normalized measurement were obtained for IES with gas-electric-heat loads.It is combined with the carbon trading mechanism model into the decision indicators of the IES economic operation.While ensuring the system load demand,the IES is divided into two scenarios:off-grid type and grid-connected type.The effects of different carbon transaction prices on system operation status,operating cost and carbon emission were discussed,and the energy efficiency analysis method was improved.Quantitative analysis of IES energy efficiency and comprehensive energy utilization in two scenarios were examined.The results show that a reasonable planning of the carbon market can effectively promote the development of IES low carbonization.This thesis also provides an analytical method for IES low carbonization modeling and carbon emission measurement.