Comprehensive evaluation of power quality energy consumption in low voltage distribution network based on subjective and objective combination weighting method
The deterioration of power quality leads to a significant increase in energy consumption of low voltage distribution network, but most of the current research is limited to the impact of single power quality index on the energy consumption of single equipment and lacking of overall analysis. In view of this, a comprehensive evaluation method for power quality energy consumption of low voltage distribution network based on subjective and objective combination weight is proposed. Firstly, the typical power quality indicators and energy-consuming equipment in the current low voltage distribution network are considered, and a comprehensive evaluation index system of power quality energy consumption is constructed. Besides, the improved analytic hierarchy process is used to determine the subjective weight, and the coefficient of variation method is used to determine the objective weight. The subjective weight and objective weight are considered comprehensively to calculate the combination weight of each index. Finally, a model for comprehensive evaluation of power quality energy consumption is established based on the combination weight. The validity of the proposed method is verified by the analysis of practical examples, and the evaluation results are more accurate and reasonable.