Özet:

Energy is an important sector with great investments and strategic importance. Wind power plants (WPPs) have the most in-demand from the capacity of renewable energy sources in Turkey, where licensing, installation and commissioning processes can be performed relatively easily. According to the Republic of Turkey’s Ministry of Energy and Natural Resources, the installed capacity of Turkey as of mid-2019 is 90.421 MW. The distribution of this installed capacity was obtained from various resources: 31.4% hydraulic energy, 29.0% natural gas, 22.4% coal, 8.0% wind, 6.0% solar, 1.5% geothermal and 1.7% from other sources. Efficiency studies on wind energy are important for directing investments correctly and evaluating national wealth. By increasing the efficiency of existing facilities, more electrical energy will be produced, and the average number of people whose energy demand are met will increase. This study aimed to determine the effectiveness of the existing 99 WPPs in Turkey, using the Data Envelopment Analysis (DEA) method. In this way, instead of investing in a new WPP, factors that contribute to ineffectiveness can be discussed by identifying inactive facilities. The efficiencies of WPPs were calculated using input-oriented CCR (Charnes, Cooper and Rhodes) and BCC (Banker, Charnes, Cooper) DEA models. The model results were compared, and the effectiveness of WPPs was investigated. The results revealed that only six plants were relatively effective according to the CCR model, while 18 plants were relatively effective according to the BCC model

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