An Evaluation Method of Diversified Load Absorptive Ability in Distribution Network Based on Hierarchical Component Theory

Abstract

With the maturity of the electric power industry and the development of the market, the load types become complex and diverse. The diversified load mentioned in this paper refers to nontraditional loads with active characteristics, such as electric vehicles charging and discharging facilities, energy storage systems, grid-connected microgrid and etc. For the effective planning of the diversified load integration into distribution network, an evaluation method of diversified load absorptive ability is presented in this paper based on the idea of hierarchical components. Firstly, a hierarchical component analysis method is proposed. Secondly, a rationality evaluation index system is presented from the perspective of safe operation, power quality and energy management to guarantee the effect integration of diversified load. Finally, the maximum absorptive ability of diversified load is evaluated by gradually increasing the capacity of the diversified load integration and adjusting the integration scheme, using "exploratory adjustment + linear interpolation" method. Rationality assessment of the absorptive capacity of distribution network for diversified load could promote the coordinated development of diversified load and power grid. This reasonable evaluation method could provide theoretical and technical support for scientific and orderly integration of diversified load to distribution network.