Research on Dynamic Island Partition of Distribution Network with Distributed Generation

When the distribution network fault, islanding partition can ensure the reliable supply of power loss load in non-fault areas, and the development of a reasonable and effective islanding partition scheme is a key part of realizing the self-healing of distribution systems. In this paper, a dynamic islanding partition method that takes into account the volatility of DG output and load demand is proposed for the distribution network containing DG and energy storage devices. Firstly, a mathematical model for dynamic islanding of the distribution network is established with the goal of maximum equivalent load recovery. Then, on the basis of the intermittency of DG output and load demand fluctuation, a dynamic islanding classification criterion based on energy storage constraints is designed, and a depth-first search and a breadth-first search algorithm is used to partition the dynamic islanding of the distribution network. Finally, case studies are carried out on the IEEE 33-bus distribution network to illustrate the effectiveness of the proposed method.