Abstract
Because electrical power affects the people's livelihood greatly, the Taiwan Power Company (TPC) is a state-owned enterprise in Taiwan. Nevertheless, due to the influence of the global economic trend, electrical power market in Taiwan has been moving toward liberalization and TPC is under privatization. Allowing the (private) independent power providers (IPP) is the key to reach the liberalization of electric power market. Also, as the increasing environmental consciousness and the difficulty in getting new land to build new plants, Taiwan government issued licenses to IPPs. Thus, it is critical for the TPC to increase the relative efficiency of operation performance and productivity of the power plants. This research applies different DEA (Data Envelopment Analysis) models to evaluative efficiencies of thermal power plants in Taiwan. These DEA models provide CCR efficiency, BCC efficiency, A&P efficiency, cross efficiency, and multi-objective efficiency. In addition to the comparison of these efficiencies and the discussion about related content, the present study also performs scale analysis, multiplier analysis, slack analysis, and sensitivity analysis. Comparing state-owned plants with private ones, we found the factors influencing the performance of various power plants. Based on the results, specific directions are provided for the inefficient power plants to adapt and improve their performance.