Distribution Grid Reliability Assessment Considering Multiple Scenarios of Distributed Power Supplies

With the increasing proportion of distributed renewable energy sources connected to the grid, the control of distribution network security operation has become more complex, bringing new challenges to power supply reliability analysis. In this paper, a method for analyzing power supply reliability of distribution network considering the uncertainty of renewable energy output in the next time of multi-scenario is proposed. Firstly, a multistate model of distribution network is established, and the state reduction of distribution network stochastic output scenarios is performed based on the backward scenario reduction algorithm; secondly, the feeder partitioning method is used to divide the scope of islanding operation, and the impact of distribution network output on power supply reliability in islanding operation is analyzed in multiple scenarios; finally, the distribution network power supply reliability analysis method is established based on the analytical method. Finally, the analytical method is used to establish the distribution network power supply reliability analysis method. The IEEE RBTS test system is utilized for simulation to verify the accuracy of the proposed method.