Research on Flexible Mutual Aid Capacity Configuration Model Between Area Power Grids

Due to the different distribution levels of power supply structure, load composition and new energy resources in different area power grids, there is a non-negligible mutual aid potential between cross-area interconnected power grids, which requires that the power flow on the cross-area power grid connection line can be controlled. The flexibility and power flow regulation characteristics of Distributed Power Flow Controller make it have great advantages in realizing flexible interconnection of cross-area power grids. This paper briefly introduces the device structure and mutual aid principle of DPFC, analyzes the potential of flexible mutual aid between area power grids, and studies the impact of flexible interconnection on the operation economy and reliability of interconnected systems. Based on these two indicators, an evaluation method of flexible mutual aid capacity between area power grids is proposed. Utilizing PSCAD/EMTDC software, we’ve developed a simulated model for a 110 kV standard system, incorporating three units of DPFC sub-modules. The outcomes of the simulation indicate that our novel assessment technique effectively harmonizes economic efficiency with operational reliability.