Multi-dimensional Comprehensive Dynamic Evaluation of the Hosting Capacity of Distributed Generations in New Distribution System

To comprehensively evaluate the distribution system hosting capacity with high-penetration distributed generation, this paper establishes a multi-dimensional evaluation index system comprising five major categories (line ampacity, voltage level, network losses, harmonic/three-phase unbalance, and distribution transformer available capacity) and 18 sub-categories. A quantitative calculation method for the comprehensive evaluation of the distribution system, based on the Analytic Hierarchy Process (AHP), is proposed. Furthermore, considering the impact of different operational states, such as risk and fault conditions, on the system hosting capacity, a dynamic adjustment strategy for index weights is specifically introduced, effectively enhancing the accuracy of the online evaluation of the distribution system hosting capacity. Finally, evaluation criteria for the distribution system hosting capacity are established. The effectiveness of the proposed evaluation method is verified using an IEEE 33-bus distribution system with integrated distributed photovoltaic generation.