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Falling efficiency levels of Indian coal-fired power plants: A slacks-based analysis

机译：印度燃煤发电厂的下降效率水平：基于松弛的分析

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We use a comprehensive data set covering almost all Indian coal-fired power plants over the period 2005-14 to evaluate the technical efficiency of power plants using the Slacks-Based Measure model. We find that average technical efficiency falls from0.847 in 2005 to 0.742 in 2014, indicating substantial scope for efficiency improvement. This trend is driven primarily by declining energy efficiency rather than declining managerial (non-energy) efficiency. We use Simar and Wilson's bootstrapped truncated regression approach to analyze the determinants of technical efficiency. We find an inverted-U shaped relationship exists between efficiency and plant age, withmaximumefficiency levels observed between 22 and 23 years of age. Privately owned plants operate at higher efficiency levels than their State-owned counterparts. Large plants are more efficient than small and medium size plants. Coal quality has no significant influence on efficiency as usage of higher calorific value coal is not accompanied by a concomitant reduction in coal use. Foreign equipped plants operate at higher efficiency levels than Indian equipped plants. (C) 2020 Elsevier B.V. All rights reserved.
机译：我们使用覆盖2005 - 15年期间几乎所有印度燃煤发电厂的全面数据集，以评估电厂的技术效率，使用基于松弛的测量模型。我们发现，2014年，2005年的平均技术效率从0.847到0.742下降，表明效率改善的实质性范围。这种趋势主要是通过能效衰退而不是管理（非能源）效率下降的推动。我们使用Simar和Wilson的截断回归方法来分析技术效率的决定因素。我们发现效率和植物年龄之间存在倒置 - U形关系，在22至23岁之间观察到的影响。私营植物的效率水平高于其国有对应物。大型植物比中小型植物更有效。煤炭质量对效率没有显着影响，因为较高的热值煤没有伴随着煤炭使用的伴随。外国设备的植物在较高效率水平上，比印度装备植物更高。 （c）2020 Elsevier B.v.保留所有权利。

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