中文摘要：

低碳经济实现的重点在于能源结构的优化。本文通过文献回顾的方式提炼了一次能源消费结构的主要影响因素,并通过路径分析测算各影响因素对能源消费结构的总影响、直接影响和间接影响,明确了影响机理。其中,能耗量约束和GDP增长对能源消费结构的优化起直接推动作用;但在碳强度和能耗强度保持不变的条件下,碳排放约束和能耗量约束总影响上对能源消费结构的优化起抑制作用。在此基础上,通过岭回归方法消除各因素的多重共线性,构建了一次能源消费结构的预测模型,并据此得出,为实现2020年低碳经济目标,煤炭消费比重应降至65.99%~66.72%,在增加GDP的同时,降低能源消耗和碳排放。

英文摘要：

In contrast to high-carbon economy, low-carbon economy is characterized by low consumption, low emissions and low pollution, so it is the most sustainable economic development model, the essence of which is changing energy use, improving energy efficiency and optimizing the energy structure through technological progress and institutional innovation. Optimization of energy structure is the key to low-carbon economy. In this paper, we summarized the main influence factors of primary energy consumption structure by reviewing the document records. The factors include energy consumption constraint, carbon emissions constraint, total population, industrial structure and GDP. At the same time, we calculated the total, direct as well as indirect impacts of each influence factor on the energy consumption structure by path analysis and then got the influence mechanism. The results indicate that energy consumption constraint and GDP growth are the main driving factors for the optimization of energy structure. However, with the extensive economic growth, low-level production technology, strong dependence on energy consumption, the carbon emissions constraint and GDP growth have inhibition effect on the optimization of energy consumption structure when the carbon intensity and energy consumption intensity remain unchanged. Based on this, the paper has constructed a predictive model of primary energy consumption structure by eliminating the multicollinearity of each factor with ridge regression method. By analyzing the government’s expectation of energy consumption constraint （3.498~5.246 billion tce）, total population （1.45 billion） and GDP （19230 billion yuan） in 2020, we got the conclusion that energy consumption and carbon emission should be reduced with the growth of GDP and the proportion of coal consumption should be reduced to 65.99%~66.72% to achieve the goal of low-carbon economy in 2020. Therefore, improvement of energy efficiency is of great necessarity. On the one hand, we need to accelerate the tra