Dynamic Reconfiguration Strategy of Flexible Distribution Network for Dis-tributed Generation Accommodation Enhancement

High-penetration distributed generation (DG), such as photovoltaics (PV) and wind turbines (WT), integrated into distribution networks brings severe voltage violations and wind/PV curtailment issues due to their stochastic and volatile output characteristics, which significantly limits the DG accommodation capability. To improve the DG hosting capacity of distribution networks, this paper proposes an operation strategy considering the coordinated optimization of soft open point (SOP) and dynamic reconfiguration. Firstly, a multi-period unified optimization model is established to minimize the total system operation cost and DG curtailment penalty cost, where the continuous power regulation of SOP and discrete switching actions of network topology are simultaneously optimized. Secondly, the original non-convex nonlinear model is transformed into a mixed-integer second-order cone programming (MISOCP) problem by second-order cone relaxation, which can be efficiently solved by commercial solvers. Finally, the proposed strategy is verified on a modified IEEE 33-bus distribution system. Simulation results demonstrate that the proposed strategy can effectively reduce the total system operation cost, mitigate wind and PV curtailment, and lower the risk of voltage violations, which verifies the superiority of the coordinated optimization of SOP and dynamic reconfiguration.