Sources of inefficient power generation by coal-fired thermal power plants in China: A metafrontier DEA decomposition approach
Sources of inefficient power generation by coal-fired thermal power plants in China: A metafrontier DEA decomposition approach
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DOI：
10.1016/j.rser.2020.110562
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发表时间：
2021-01-18
影响因子：
15.9
通讯作者：
Lin, Chen
中科院分区：
文献类型：
--
作者：
Eguchi, Shogo;Takayabu, Hirotaka;Lin, Chen
中国是世界上最大的二氧化碳排放国，2015年燃煤火力发电占中国总发电量的50%以上。本研究报告了2009 - 2011年中国燃煤火电厂发电效率的变化情况，阐明了火电厂生产规模差异和区域异质性对发电效率的影响。我们提出了一个元前沿数据包络分析（DEA）的分解框架，调查发电效率低下的来源。结果表明，平均而言，大型发电厂的发电效率比小型发电厂高13%。虽然运营效率低下是中国东部和中部地区效率低下的主要原因，但技术差距-发电所用煤炭质量和发电厂设备的地区差异-是中国西部地区效率低下的主要原因。本研究利用该框架的结果对我国燃煤火电厂的报废政策进行了探讨。对于中国西部的大型电厂，低效率的组成部分各不相同，因此，政策制定者不仅要考虑低效率的水平，还要考虑其组成部分，以考虑废弃火电厂。
China is the world's largest CO2 emitting country, and coal-fired thermal power generation accounted for over 50% of the total electricity generation in China in 2015. This study reports the changes in the power generation efficiency of coal-fired thermal power plants in China from 2009 to 2011 and elucidates how the differences in the production scale of the power plants and regional heterogeneity affect the power generation efficiency. We propose a metafrontier data envelopment analysis (DEA) decomposition framework to investigate the sources of inefficiency in power generation. The results suggest that, on average, the power generation efficiency of largescale power plants is 13% higher than that of small-scale power plants. Although operational inefficiency is the main source of inefficiency in eastern and central China, the technology gap the differences in the quality of coal consumed for electricity production and in the equipment of the power plants among regions is the main source of inefficiency in western China. This study uses the results of the framework to discuss the scrapping policies for coal-fired thermal power plants in China. For large-scale power plants in western China, the components of inefficiency vary and, thus, policymakers should consider scrapping thermal power plants based not only on the level of inefficiency but also on their components.