The large-scale distributed new energy integration poses a risk of insufficient flexibility in the "node-network" dual aspect of the new distribution system

making the planning and configuration of soft open point integrated with a hybrid energy storage system (HESS-SOP)

achieving coordinated control of heterogeneous and flexible resources between node and network types

an important technical means to improve node flexibility regulation support and network transmission security margin. To address this

establish a new collaborative planning and operation model for the distribution system that integrates the dual flexibility of "node-network" into HESS-SOP. Firstly

study the topology and joint regulation characteristics of introducing HESS into SOP to form HESS-SOP. Then

a transfer distribution factor is introduced to establish a new flexible supply-demand balance model for distribution systems containing HESS-SOP from the perspective of transmission lines. The "node-network" flexible supply-demand balance mechanism is analyzed

and a "node-network" dual dimensional flexibility evaluation is established to form a balance criterion. Secondly

the active power flow sensitivity method and Hilbert Huang transform method are used to select the site and configure the initial parameters of HESS-SOP

respectively. A planning operation joint optimization framework considering the dual flexibility regulation potential of HESS-SOP's "node-network" is established

and a hybrid algorithm is used for solution; Finally

a case study was conducted based on the improved IEEE33 node system. The results show that the proposed flexibility index can accurately quantify the dual the dimensional flexibility of the "node-network” system and the planning operation joint optimization framework model considering the flexibility regulation potential of HESS-SOP can effectively improve the economic and flexibility of distribution system operation.