Power distribution network single-phase earth fault section positioning method and device and terminal equipment

Abstract

The invention provides a power distribution network single-phase earth fault section positioning method and device and terminal equipment, and the method belongs to the technical field of fault positioning, and comprises the steps: obtaining a first attribute parameter of a target power distribution network, and determining a fault section positioning model corresponding to the target power distribution network based on the first attribute parameter and a preset mapping table; and acquiring a second attribute parameter of the target power distribution network, and inputting the second attribute parameter into a fault section positioning model corresponding to the target power distribution network to obtain a single-phase earth fault section of the target power distribution network. According to the power distribution network single-phase earth fault section positioning method and device and the terminal equipment provided by the invention, the attribute characteristics of the power distribution network are considered, so that higher positioning precision is achieved.

Description

technical field [0001] The invention belongs to the technical field of fault location, and more specifically relates to a method, device and terminal equipment for locating a single-phase ground fault section of a power distribution network. Background technique [0002] The most prone fault in the distribution network is single-phase ground fault. After a single-phase ground fault occurs, the line voltage is still symmetrical and the fault current is small. Although it does not affect the continuous power supply to the load temporarily, long-term operation may cause the fault to expand or Damage to electrical equipment, so quickly and accurately finding the fault location is of great significance to the safe and stable operation of the distribution network. [0003] In the existing technology, the location of the fault section relies on manual line inspection, and the grid operators patrol along the line to find the fault location. This method not only consumes a lot of man...

AI Technical Summary

Problems solved by technology

[0002] The most prone fault in the distribution network is single-phase ground fault. After a single-phase ground fault occurs, the line voltage is still symmetrical and the fault current is small. Although it does not affect the continuous power supply to the load temporarily, long-term operation may cause the fault to expand or Damage to electrical equipment, so quickly and accurately finding the fault location is of great significance to the safe and stable operation of the distribution network

[0003] In the existing technology, the location of the fault section relies on manual line inspection, and the grid operators patrol along the line to find the fault location. This method not only consumes a lot of manpower and material resources, but also is not efficient, prolonging the user's time Power outage time has a great impact on power supply reliability

Later, a method of locating the fault section by the traveling wave method appeared. Although the positioning efficiency has been improved, the positioning accuracy of the traveling wave method needs to be improved because the traveling wave method is easily affected by the transition resistance and the operation mode of the power grid.

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