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A Method for Locating Leakage Points of Low-Voltage Power Network

A technology of low-voltage power grid and positioning method, applied in the field of low-voltage power grid, can solve the problems of long time for leakage point search, many branch lines, long lines, etc., and achieve the effect of improving leakage processing efficiency, narrowing the scope of investigation and shortening the scope.

Active Publication Date: 2020-02-04
JIANGMEN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID
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  • Claims
  • Application Information

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Problems solved by technology

Since the general rural low-voltage power grid has a large power supply range, long lines, and many branch lines, the above method needs to conduct a full-coverage investigation of the entire low-voltage power grid, resulting in long time-consuming and low efficiency for finding leakage points.

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  • A Method for Locating Leakage Points of Low-Voltage Power Network
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  • A Method for Locating Leakage Points of Low-Voltage Power Network

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Embodiment Construction

[0019] The accompanying drawings are for illustrative purposes only, and should not be construed as limitations on this patent; in order to better illustrate the present embodiment, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art It is understandable to the artisan that certain well-known structures and descriptions thereof may be omitted from the drawings. The positional relationships described in the drawings are only for exemplary illustration, and should not be construed as a limitation on the present patent.

[0020] like Figure 1-5 As shown, a method for locating the leakage point of the low-voltage power grid includes the following steps:

[0021] S01: Use a leakage detector to measure the leakage current value Ia at the position a of the low-voltage line. If it is the first measurement, set the position a as the power point of the low-voltage line; judge acc...

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Abstract

The invention relates to the technical field of low voltage power grids, and more particularly relates to a method for positioning leakage points of a low voltage power grid. According to the method,the leakage current of the characteristic points of the low voltage power grid is measured; the position of a next characteristic point and the troubleshoot range of the leakage points are judged according to the value of the leakage current of the characteristic points; the leakage point troubleshoot range of personnel is shortened; the troubleshoot workload is reduced; the efficiency of leakagetreatment is improved; for the positioning of a single leakage point, a traditional method is used to find the leakage point, and the entire low voltage power grid needs to be troubleshot in extreme cases; and by applying the method, the traditional leakage point troubleshoot range can be effectively shortened to within L0, and the troubleshoot range is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of low-voltage power grids, and more specifically, to a method for locating leakage points of low-voltage power grids. Background technique [0002] The low-voltage power grid in rural areas is complex, the geographical environment is quite different, and the nature of electricity consumption is diverse. Many factors affect the reliable operation of the low-voltage power grid. Leakage is a relatively common low-voltage power grid fault. Leakage refers to the phenomenon that the insulation of lines, switches or electrical equipment is damaged, so that part of the phase line current directly leaks to the earth without returning to the neutral line. The current leaking to the earth is called residual current or leakage current. Power grid leakage can easily cause personal electric shock, fire and other accidents. Therefore, when a low-voltage power grid leaks, it is necessary to find out the leakage point as s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
CPCG01R31/086G01R31/50
Inventor 冯志坚张鹏晖戴雄杰区泽超林群钊
Owner JIANGMEN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID
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