Input-output efficiency evaluation of power supply station based on hybrid DEA method

Based on the characteristics of multiple inputs and multiple outputs of power grid enterprises, a hybrid data envelopment analysis method is proposed to evaluate the input-output efficiency of power grid enterprises. The method sequentially adopts CCR, BBC and SE-DEA methods to analyze the input-output efficiency of power supply companies, which can improve the differentiation of effective units and enhance the comparison effect. In the instance verification, net asset value, annual input personnel, annual input cost and distribution line length are selected as input indicators, and electricity sales, number of customers and line loss rate are selected as output indicators, and data of twenty-one power supply stations are used as verification data in this paper. Through the instance verification, a scientific and reasonable analysis of the input-output efficiency of power supply stations is realized, and the problems and improvement directions of power supply station inputs are pointed out.