Research on Comprehensive Evaluation Model of Distribution System Energy Efficiency Based on a CV-Grey clustering method

Abstract

Energy efficiency evaluation of distribution systems is to estimate the efficiency of energy utilization on the premise of safe operation. With the continuous development of new technologies, such as diversified load, renewable energy and demand-side management, new requirements for energy efficiency evaluation are put forward. However, previous works mainly focus on traditional distribution networks and primarily based on subjective methods such as the analytic hierarchy process. In this paper, a comprehensive evaluation model of distribution network energy efficiency is proposed based on the coefficient of variation (CV) - Grey clustering method. Firstly, the evaluation index system of energy efficiency was established from the aspects of equipment, planning, operation and management. Secondly, a grey clustering method based on evaluation model of energy efficiency is introduced. It includes two steps: 1) the weights are determined based on the CV method, 2) the comprehensive evaluation model is established based on the grey triangular whitenization weight function. Finally, the efficiency level of an actual distribution network in eastern China is evaluated as an example. Case analysis shows that the proposed method could scientifically evaluate the energy efficiency, identify the weaknesses and provide references for planning and construction strategy of distribution networks.