A power distribution network fast protection partition reconstruction method and device based on a dynamic relay topology

CN122393876APending Publication Date: 2026-07-14NANJING GUODIAN NANZI POWER GRID AUTOMATION CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner: NANJING GUODIAN NANZI POWER GRID AUTOMATION CO LTD
Filing Date: 2026-04-27
Publication Date: 2026-07-14

AI Technical Summary

Technical Problem

Existing methods for reconfiguring distribution network protection zones rely on manual intervention, resulting in slow response times and complex operations. These methods fail to meet the demands for rapid protection and efficient operation and maintenance, and also carry the risk of human error.

Method used

A bidirectional tracing method based on dynamic relay topology is adopted. By identifying the sub-graph of the topology to be transferred, and using the tie switch as the relay communication channel, automatic and rapid protection partition reconstruction is achieved, node numbering conflicts are avoided, and communication link reconstruction and adaptive adjustment of protection partitions are completed.

Benefits of technology

It enables rapid and accurate protection zone reconfiguration of the distribution network under various operating modes, reduces maintenance workload, lowers equipment costs, and improves the adaptability and response speed of the distribution network.

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Abstract

The application discloses a power distribution network fast protection partition reconstruction method and device based on a dynamic relay topology, and relates to the technical field of relay protection. The power distribution network fast protection partition reconstruction method based on the dynamic relay topology comprises the following steps: initializing modeling according to a power distribution network physical topology to obtain a topology structure diagram; identifying initial tie switches in the topology structure diagram; monitoring the state of the initial tie switches in real time; when a new tie switch appears: taking the initial tie switch and the new tie switch as boundaries, identifying a topological subgraph to be transferred through a bidirectional tracing method; taking the initial tie switch as a relay communication channel, transmitting topological subgraph information to be transferred and a power distribution terminal communication address to a target side protection device connected with the new tie switch; and the target side protection device completes topological fusion of the topological subgraph to be transferred, re-encoding of node number uniqueness and reconstruction of a communication link. The application does not need to add new communication hardware, realizes adaptive reconstruction of protection partition, and improves the operation reliability of the power distribution network.

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