Power Generation Efficiency Evaluation of Hydropower Plants Based on the DEA

The power generation efficiency of hydropower plants is an important factor affecting business performance and fulfilling corporate social responsibility. Scientific evaluation of power generation efficiency is an important basic work for power generation enterprises to improve the energy efficiency. Therefore, this paper proposes a DEA-based hydropower plants efficiency evaluation method. Based on the main factors affecting power generation, the average water consumption rate, average inflow rate, and monthly water consumption are input as the DEA, and monthly power generation is used as the output to establish a power generation efficiency evaluation model, and then energy efficiency of the hydropower plant is analyzed and evaluated. The results show that the power generation efficiency of hydropower plants is lower between April and September each year. At the same time, the power generation in the non-effective month of the hydropower plant can achieve effective after reasonable allocation of the slack variables of input and output based on the DEA.