A power distribution area intelligent distributed protection and fault self-healing method

By establishing a distributed protection topology in the distribution transformer area, adopting interlocked protection logic and intelligent setting coordination, and combining intelligent hierarchical reclosing, the problem of fault location and isolation in the distribution transformer area was solved, achieving rapid and accurate fault isolation and reduction of power outage range, and reducing construction costs and communication dependence.

CN116896054BActive Publication Date: 2026-06-26STATE GRID HUBEI ELECTRIC POWER RES INST +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
STATE GRID HUBEI ELECTRIC POWER RES INST
Filing Date
2023-06-19
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Fault location and isolation in distribution transformer substations are difficult to achieve accurately and automatically. Existing communication methods have communication delays and instability issues in distribution transformer substation applications, leading to cascading trips and expanding the scope of power outages.

Method used

A distributed protection topology is established, employing interlocking protection logic and intelligent setting coordination logic, combined with intelligent hierarchical reclosing, to achieve rapid fault isolation and accurate fault location.

Benefits of technology

It enables rapid and accurate location and isolation of distribution transformer area faults, reduces the scope of power outages, lowers construction costs and communication dependence, and improves system reliability and economy.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides a power distribution area intelligent distributed protection and fault self-healing method, which comprises the following steps: (1) establishing a distributed protection topology structure, dividing the power distribution area into four levels of a total opening of the area, a feeder switch of the area, a T-connection / branch switch and a household switch, and installing distributed protection devices at the corresponding levels; (2) when the communication of the distributed protection topology structure is reliable, adopting a blocking protection logic; (3) when the communication of the distributed protection topology structure is unreliable or the next level switch fails, realizing protection tripping through a preset intelligent setting value cooperation logic; and (4) after executing the protection action, automatically isolating the fault area through intelligent hierarchical reclosing to reduce the power outage range. The application forms a perfect power distribution area protection and fault self-healing scheme by establishing a distributed protection topology structure, a blocking protection logic, intelligent setting value cooperation and intelligent hierarchical reclosing, and takes into account the reliability and economy.
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