Abstract

Aiming at the problems of low utilization efficiency of photovoltaic power generation system, high construction cost of photovoltaic power station and defects of power station operation and maintenance technology, an energy efficiency evaluation method of photovoltaic power generation system based on analytic hierarchy process and fuzzy comprehensive evaluation is proposed. Firstly, this method analyzes the energy efficiency influencing factors of photovoltaic power generation system, and establishes the energy efficiency evaluation index system of photovoltaic power generation system, which includes three categories and 11 items, including static index, dynamic index and loss index. Secondly, analytic hierarchy process is used to determine the weight of each energy efficiency evaluation index, and the membership degree of each index is calculated by the classification standard. Finally, the energy efficiency evaluation results of photovoltaic power generation system are obtained through fuzzy evaluation calculation, and the evaluation level is determined. A distributed photovoltaic power station in northwest China is selected as an example to verify the effectiveness of the method. The results show that the method can objectively reflect the actual characteristics of photovoltaic power generation system, which is in line with the energy efficiency level of actual photovoltaic power generation system, and can provide some reference experience for energy efficiency evaluation of similar photovoltaic power generation system.

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