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Low-current fault positioning method based on fault characteristic value

A fault feature and fault location technology, applied in fault location, fault detection according to conductor type, measurement of electricity, etc., can solve problems such as large amount of data transmission, difficulty in coordination, and complex positioning algorithm of the master station, and achieve a small amount of data transmission. Effect

Pending Publication Date: 2021-03-09
SHENZHEN POWER SUPPLY BUREAU
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are some deficiencies. Specifically, in the project, it is difficult to accurately and synchronously record transient current signals between monitoring points on the line. Each line monitoring point needs to upload fault recording data to the main station. high pressure
The positioning algorithm of the master station is complex, and it is difficult to cooperate with products from different manufacturers

Method used

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  • Low-current fault positioning method based on fault characteristic value
  • Low-current fault positioning method based on fault characteristic value
  • Low-current fault positioning method based on fault characteristic value

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Embodiment Construction

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0050] In order to make those skilled in the art more clearly understand the purpose, technical solutions and advantages of the invention, the invention will be further elaborated below in conjunction with the accompanying drawings and embodiments.

[0051] Such as figure 1 As shown, it shows a schematic structural diagram of an embodiment of a method for locating small current faults based on fault characteristic values ​​provided by the present invention, combined with Figure 2 to Figure 5 As shown, in this embodiment, the method includes the following steps:

[0052] Step S10, each line terminal in the distribution network periodically collects three-phase and z...

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Abstract

The invention discloses a low-current fault positioning method based on a fault characteristic value. The method comprises the steps that: S10, line terminals in a power distribution network periodically collect three-phase and zero-mode voltage signals, and detect whether a line has a single-phase grounding fault or not; S11, the line terminals obtain fault waveforms, and fault characteristic values corresponding to the line terminals are calculated; S12, the line terminals uniformly upload the fault characteristic values carrying address information and time labels to a main control terminal; and S13, the main control terminal positions a line fault according to all the fault characteristic values, a topology identification matrix corresponding to the lines and a predetermined fault unified judgment strategy. By implementing the invention, the fault positioning process and the data transmission quantity between the terminals can be simplified, and the positioning efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of fault location, in particular to a small current fault location method based on fault characteristic values. Background technique [0002] The neutral point of my country's distribution network is widely operated without grounding or grounding through the arc suppression coil. When a single-phase (small current) ground fault occurs in the line, the fault signal is weak and difficult to detect, and the ground fault accounts for a high proportion of distribution network faults; In addition, the randomness of distribution network side load distribution, topology complexity and data processing scale continue to expand, which intensifies the difficulty of fault handling. Therefore, improving the single-phase ground fault location speed and reducing the fault occurrence time have become the key points of distribution network fault processing Research hotspots. As an effective means of section location, the fault...

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Application Information

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IPC IPC(8): G01R31/08G01R31/52
CPCG01R31/086G01R31/088G01R31/52
Inventor 王廷凰
Owner SHENZHEN POWER SUPPLY BUREAU