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Fault diagnosis method, device and system for nitrogen leakage

A technology of fault diagnosis and nitrogen, which is applied in the application of electric devices to test fluid tightness, etc., can solve the problems of long maintenance cycle and low efficiency, and achieve the effects of rapid determination, improvement of maintenance efficiency and shortening maintenance cycle

Active Publication Date: 2020-01-07
STATE GRID CORP OF CHINA +1
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  • Claims
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Problems solved by technology

[0003] In view of this, the embodiment of the present invention provides a nitrogen leakage fault diagnosis method, device and system to solve the problems in the prior art that manual maintenance is used to determine the type of nitrogen leakage fault of the circuit breaker, and the maintenance cycle is long and the efficiency is low.

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  • Fault diagnosis method, device and system for nitrogen leakage
  • Fault diagnosis method, device and system for nitrogen leakage
  • Fault diagnosis method, device and system for nitrogen leakage

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Embodiment Construction

[0045] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0046] In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.

[0047] refer to figure 1 , the first aspect of the embodiment of the present invention provides a nitrogen leakage fault diagnosis method, including:

[0048]S101, if the level of one of the preset test points in the circuit breaker control circuit changes, then obtai...

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Abstract

The invention is applicable to the technical field of power equipment maintenance, and provides a nitrogen leakage fault diagnosis method, device and system. The method comprises the steps: acquiringlevel change information for each preset test point, wherein the level change information comprises a level change time and a high level duration; when a circuit breaker gives out a nitrogen leakage fault alarm, acquiring the state of each preset test point at the alarm time; determining the sequence of the level changes and the time interval of the level change of each preset test point accordingto the level change time and the high level duration of each preset test point; determining the type of a nitrogen leakage fault of the circuit breaker according to the sequence of level changes of each preset test point, the time interval of level changes of each preset test point, and the level state at the alarm time of each preset test point, and preset fault type characteristic information.According to the invention, the type of fault can be quickly determined, the fault location can be quickly located, the maintenance period is shortened, and the maintenance efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of power equipment maintenance, and in particular relates to a nitrogen leakage fault diagnosis method, device and system. Background technique [0002] High-voltage circuit breakers are the most important electrical components in the power grid, which play a role in control and protection in the power grid. Taking the Siemens 3AQ1EG circuit breaker as an example, this type of circuit breaker uses SF6 gas as the insulating and arc-extinguishing medium, and is equipped with a hydraulic nitrogen operating mechanism. It has the advantages of convenient installation, simple operation, stable operation and less maintenance workload. Advantages, it is widely used in switching of reactive power compensation devices such as reactors and capacitors in the power grid. However, the statistical data used in the field shows that nitrogen leakage is a frequent failure of this type of circuit breaker. When a nitrogen leak...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/40
CPCG01M3/40
Inventor 池威威高淼林江凯王春月刘洋高天宇胡伟涛
Owner STATE GRID CORP OF CHINA
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