面向并网灵活性提升的微电网网络重构方法OA

With the massive integration of distributed energy resources,microgrids have become a critical platform for supporting the coordinated operation of source-grid-load-storage systems.The regulation flexibility provided by microgrids at the point of common coupling(PCC)serves as an important adjustable resource for power systems.However,due to constraints such as internal voltage stability and branch capacity limitations,the flexibility of distributed resources cannot be fully manifested at the PCC,and the available flexibility varies significantly under various network reconfiguration strategies.To address this challenge,this paper proposes a network reconfiguration based method for grid-connected flexibility enhancement.First,a characterization model for grid-connection flexibility based on microgrid aggregation is established,and a two-stage robust optimization framework is developed,in which the first stage maximizes the aggregated flexibility at the PCC through topology optimization,while the second stage verifies the feasibility of disaggregation.The strong duality theory and the column and constraint generation algorithm are employed to efficiently solve the model.Case studies demonstrate that the proposed method can fully tap into the flexibility of distributed energy resources through network reconfiguration,significantly improving the grid-connected flexibility of microgrids.