Performance score of operational, generation and environmental effect of thermal power plants

In this study, efficiency analyses of the 11 lignite-fired, 1 hard coal-fired and 3 natural gas-fired state owned thermal power plants used for electricity generation were conducted with Data Envelopment Analysis (DEA). Two efficiency indexes, operational and environmental performance, were defined and pursued. In the calculation of the operational performance, main production indicators were used as input, and fuel cost per actual production (Y) was used as output (Model 1). On the other hand, in the calculation of the environmental performance, gases emitted to the environment were used as output (Model 2). Data Envelopment Analysis (DEA) is the main instrument for the measurement of the relative performances of the decision units with multiple inputs and outputs. Constant returns to scale (CRS) and variable returns to scale (VRS) type DEA models were used in the analyses. The relationships between efficiency scores and input/output factors were investigated. Upon the obtained results, the power plants were evaluated with respect to both the cost of electricity generation and the environmental effects.Key Words :Thermal power plant, data envelopment analysis, environmental effect