Method and device for detecting power insulating material under irradiation of X rays

A technology of insulating materials and detection methods, applied in the direction of testing dielectric strength, etc., can solve problems such as performance impact, and achieve the effects of good detection effect, easy implementation, and simple device structure

Inactive Publication Date: 2012-06-20
YUN NAN ELECTRIC TEST & RES INST GRP CO LTD ELECTRIC INST
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Problems solved by technology

[0003] Compared with the ultrasonic partial discharge detection method, the X-ray digital imaging detection technology has more advantages, but the pot insulator in the GIS equipment is a solid insulating material-epoxy resin, and the insulating material itself Whether the performance will be affected, so far, there are few reports at home and abroad

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  • Method and device for detecting power insulating material under irradiation of X rays
  • Method and device for detecting power insulating material under irradiation of X rays
  • Method and device for detecting power insulating material under irradiation of X rays

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Embodiment Construction

[0023] The detection method of electrical insulation materials under X-ray irradiation, the method includes:

[0024] 1) Set up insulation scratch defects: first, take out the basin insulator inside the GIS test section without electrification, and then set insulation scratch defects on the basin insulator;

[0025] 2) Measure the insulation scratch defect using an electron microscope: use an electron microscope to observe the size and size of the defect at 50-500 times, and record it in the form of a picture;

[0026] 3) Establish a partial discharge detection platform: reinstall the pot insulator in the GIS test section, and connect the high-voltage lead wire of the bushing in the GIS test section to the test transformer; use an ultrasonic sensor to cling to the shell at the scratch defect position of the pot insulator in the GIS test section On; pressurize; use a portable ultrasonic industrial computer to monitor the partial discharge inception voltage and breakdown voltage...

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Abstract

The invention discloses a method and a device for detecting a power insulating material under irradiation of X rays. The method comprises the following steps: 1), setting an insulating scratch defect; 2) measuring the insulating scratch defect by using an electronic microscope; 3), establishing a local discharge detection platform; 4), after local discharge detection stops, measuring the insulating scratch defect again, and comparing with a preceding measurement result; and 5), judging the change of the defect of a solid insulating material of power equipment according to a comparison result. The method and the device have the advantages as follows: by the method, the application range of an X-ray digital imaging detection technology in performing visual detection on the power equipment can be accurately determined; and the device is simple in structure, easy to implement and good in detection effect, and can acquire a visual defect and further determine the type of the defect.

Description

technical field [0001] The invention relates to a partial discharge detection device and method for power equipment, and is particularly suitable for the technical field of a partial discharge detection device and method for defects in solid insulating materials of power equipment under X-ray irradiation. Background technique [0002] GIS (Gas Insulated Combined Electrical Appliance) equipment has the advantages of small footprint, convenient installation and high reliability, and is more and more widely used in the power grid. Because it is a fully enclosed composite structure equipment, once a failure occurs, it will take a long time to repair. The main cause of the internal failure of GIS equipment is the deterioration of insulation performance, and its precursor and main manifestation is partial discharge. At the same time, when the partial discharge signal occurs inside the GIS, shock vibration and sound will be generated, so the ultrasonic sensor installed on the oute...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
Inventor 王达达于虹赵现平蔡晓兰吴章勤魏杰况华张少泉薛飞张微谭向宇
Owner YUN NAN ELECTRIC TEST & RES INST GRP CO LTD ELECTRIC INST
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