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Diagnosis method for insulation defect of switchgear

A technology for insulation defects and switchgear, applied in the field of switchgear, can solve the problems of different energy and frequency of partial discharge, difference of air decomposition products, etc.

Active Publication Date: 2016-05-04
HAINAN POWER GRID CO LTD ELECTRIC POWER RES INST
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AI Technical Summary

Problems solved by technology

Due to the difference in energy and frequency of partial discharge caused by insulation defects, there are differences in the air decomposition products reflected in the switchgear

Method used

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  • Diagnosis method for insulation defect of switchgear

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Embodiment Construction

[0017] Such as figure 1 As shown, the method of the embodiment of the present invention uses the air discharge to decompose components to diagnose the insulation defect of the switchgear, which may specifically include the following steps:

[0018] Step 101: Establish a detection mode for air discharge decomposition products in the switchgear.

[0019] Here, the detection mode includes collecting gas and detecting gas components. Among them, collecting gas includes collecting the gas inside the switch cabinet to the detection device by using the preset gas sampling hole from the rear or under the handcart of the switch cabinet. The detection of gas components is to use a detection device integrated with a variety of gas electrochemical sensors to complete the discharge decomposition product NO in the switch cabinet. 2 , NO, O 3 , CO detection and detection data.

[0020] Step 102, establishing correlation characteristics between air discharge decomposition products and def...

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Abstract

The invention discloses a diagnosis method for the insulation defect of a switchgear. The method comprises that a mode of an air discharge decomposition product in the switchgear is established; the association feature between the air discharge decomposition product and the insulation defect in the switchgear is established; and according to the association feature, the type of the insulation defect in the switchgear is determined. According to the method provided by the invention, the type, content and change trend of gas component in the switchgear are detected to determine the insulation defect in the switchgear, so that defects in the switchgear can be discovered timely, effective measures can be taken to avoid further development of the defect, and operation accidents of the switchgear can be reduced.

Description

technical field [0001] The invention relates to the technical field of switch cabinets, in particular to a method for diagnosing insulation defects of a switch cabinet. Background technique [0002] The switchgear is a whole that assembles various equipment, busbars, supporting insulators and other components in its shell, which makes its related experiments must be carried out after the on-site assembly is completed, but the high-voltage withstand voltage and PD tests on the site require Much more difficult than doing it in a factory. Once an accident occurs in a closed switchgear, the damage is usually more serious than that of the separated open equipment in the past, and the repair work is much more complicated than that of the separated open equipment, and the repair time is longer. Moreover, the structure of current switchgear products is becoming more and more compact, and its internal insulation margin is reduced accordingly, and early insulation faults are difficul...

Claims

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/12
Inventor 陈林聪陈晓琳裘吟君张薇李欣然张奇伟张晓星
Owner HAINAN POWER GRID CO LTD ELECTRIC POWER RES INST
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