Power Recovery Strategy of Distribution Network with Distributed Power

With the increasing proportion of distributed generator (DG) in the distribution network, the method of applying DG to the fault recovery of the distribution network can not only maximize the use of DG, but also improve the stability of the system. This paper first established a mathematical model for power recovery with the goal of reducing the number of switching operations, the amount of power loss, and the loss after recovery. Then, a hierarchical islanding method was proposed to solve the problem that the main network cannot restore power supply completely. This method effectively combines the restoration of power from the main network and the operation of DG islands. The method not only makes full use of distributed power's resources, but also significantly improves the speed and performance of power restoration. Finally, the IEEE 33-node power distribution system was used for simulation experiments.