The mesh partitioning method based on voltage level in modern power system

With the large-scale integration of renewable energy, traditional power-mesh dispatching modes can no longer cope with the complexity of collaborative source-network-load-storage operation. This paper proposes a novel partitioning and operation method that treats "mesh balance" as the primary objective. Based on 220 kV main-transformer nodes, the network is divided into supply meshes, and a three-level balance mechanism—self-balance, mutual support, and upper level coordination—is established. Resources inside each mesh are scheduled for local balancing first, faults are isolated rapidly, and renewable energy is accommodated efficiently. Tests on real data from Jiangsu, Inner Mongolia and Hunan show that the standard deviation of mesh-load profiles falls by 68%, average fault-recovery time is shortened by80%, and renewable-energy utilization increases by 17%. The results demonstrate that the method significantly improves mesh-operation efficiency and renewable-energy hosting capability, and is suitable for next-generation regional dispatch systems.