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Breakdown failure positioning method of GIS on-site voltage withstand test based on vibration test

A technology of fault location and withstand voltage test, which is applied in the direction of testing the dielectric strength, etc., can solve the problems of affecting the construction progress of the site, the scope is large, and the location of the fault cannot be determined intuitively, so as to avoid the trouble of large-scale disintegration inspection and improve On-site construction progress and the effect of eliminating quality hazards

Active Publication Date: 2014-05-07
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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Problems solved by technology

Once a breakdown fault occurs in the withstand voltage, since the GIS is fully enclosed, it is impossible to visually determine the location of the fault by human eyes
The AC UHV 1100kV GIS has the characteristics of large range, long busbar, and many gas chambers. If there is no reliable breakdown fault location method, it is necessary to conduct a large-scale disintegration inspection. On the one hand, it will affect the construction progress on the site. Restoration of multiple air chambers after dismantling and inspection will also bring certain quality hidden dangers

Method used

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  • Breakdown failure positioning method of GIS on-site voltage withstand test based on vibration test

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Embodiment

[0020] A breakdown fault location method based on vibration test of GIS field withstand voltage test. Multiple vibration sensors are arranged on the GIS shell within the tested range for monitoring, and vibration signals when GIS breakdown faults occur are collected, and analyzed by comparison. The amplitude difference and time difference between the signals of the measuring points are used to locate the fault. The position vibration sensors described above can cover the tested GIS.

[0021] Such as figure 2 Shown, the present invention specifically comprises the following steps:

[0022] 1) Number n for each position vibration sensor, where n=1, 2...k;

[0023] 2) Find the test point m with the largest vibration signal peak value, and its vibration signal peak value is A mMAX ;

[0024] 3) Obtain the test point O where the vibration response occurs earliest, and define the peak position of the test point as A o , and define the moment corresponding to the peak position ...

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Abstract

The invention relates to a breakdown failure positioning method of a GIS on-site voltage withstand test based on a vibration test. A plurality of vibration sensors are distributed on a GIS outer shell within a test range to carry out monitoring, the vibration signals generated when a GIS breakdown failure occurs are collected, and failure positioning is carried out by comparing the amplitude difference and time difference between monitoring point signals. Compared with the prior art, the breakdown failure positioning method of the GIS on-site voltage withstand test based on the vibration test has the advantages of being high in test accuracy and saving the trouble of large-area detachment examination by achieving failure positioning through the vibration test, thereby effectively improving the on-site construction progress, and meanwhile eliminating quality hidden risks caused by large-area detachment.

Description

technical field [0001] The invention relates to a breakdown fault location method of a GIS field withstand voltage test, in particular to a breakdown fault location method of a GIS field withstand voltage test based on a vibration test. Background technique [0002] GIS (Gas Insulated Metal Enclosed Switchgear) is a fully enclosed electrical equipment, including multiple components and busbar air chambers. According to the requirements of relevant standards, after the GIS is installed on site, a withstand voltage test should be carried out to check the equipment manufacturing, Shipping and installation quality. Once a breakdown fault occurs in the withstand voltage, since the GIS is fully enclosed, it is impossible to visually determine the location of the fault by human eyes. The AC UHV 1100kV GIS has the characteristics of large range, long busbar, and many gas chambers. If there is no reliable breakdown fault location method, it is necessary to conduct a large-scale disi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
Inventor 徐鹏苏勇令高凯贺林倪浩
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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