Real-time microscopic observation test system for electrical tree characteristics in solid insulation under DC voltage

A solid insulation, DC voltage technology, applied in the direction of testing dielectric strength, parts of electrical measuring instruments, measuring electricity, etc., can solve the problems of violent shaking of liquid level, clear photos, doubts about the rationality of electrical tree test results, etc. Reduce the shaking of silicone oil, easy to take and place
CN104965162AActive Publication Date: 2015-10-07XI AN JIAOTONG UNIV +1
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
XI AN JIAOTONG UNIV
Publication Date
2015-10-07

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Abstract

The invention relates to a real-time microscopic observation test system for electrical tree characteristics in solid insulation under DC voltage, which comprises an open container, a supporting base is placed in the open container, a tested sample is placed on the supporting base, a pin electrode of the sample is connected with a high-voltage lead through a high-voltage copper cylinder, a plate electrode of the sample is connected with a low-voltage lead through a low-voltage copper rod, the low-voltage copper rod, a spring and the high-voltage copper cylinder are matched in design so as to be conducive to placement and position fixing of the sample, the open container is covered by a container cover, sloshing of silicon oil in an area above the sample can be effectively weakened through a microscopic observation column inserted at a hole in the container cover, and a direct observation window on the container cover is used for carrying out position observation and adjustment on the microscopic observation column. The real-time microscopic observation test system can fix the position of the tested sample effectively, is convenient for placing and taking the sample, can be applied to solid insulation electrical tree test samples with different shapes and sizes, can carry out real-time observation and photographic recording on a pinpoint area of the sample while applying the DC voltage, and does not need to cut off the power.
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Description

technical field

[0001] The invention relates to a microscopic observation test system for the characteristics of electric dendrites, in particular to a test system for real-time microscopic observation of the initiation and growth characteristics of electric dendrites in solid insulation under an external DC voltage. Background technique

[0002] Due to the advantages of compact structure, convenient installation, easy maintenance, and environmental friendliness, solid insulated power equipment has been widely used in AC and DC transmission and distribution networks, and has replaced oil-paper and gas-insulated structures in many occasions.

[0003] The study found that for high-voltage / ultra-high-voltage solid insulation, electrical dendration is the main cause of insulation failure. The research on the characteristics of electrical dendrites of solid insulating materials under AC voltage is extensive, mainly involving the influence of temperature, voltage amplitude, boost ...

Claims

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