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Structure of ceramic electronic voltage transformer and application method of structure

A technology of voltage transformers and ceramics, applied in the direction of voltage/current isolation, etc., can solve the problems of unfavorable environmental protection of SF6 insulating gas, changes in transformer parameters, and increased partial discharge levels

Inactive Publication Date: 2014-12-10
林纪秋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has a complex structure, large volume, heavy weight, high requirements on product technology, and high cost. It is easy to form ferromagnetic resonance with the capacitive equipment in the line, which will bring harm to the power system. Therefore, electromagnetic voltage transformers have gradually become popular. Other forms of voltage transformers are replaced by
The existing electronic transformers are difficult to meet the design standard due to the inherent characteristics of the material or the technical requirements, and are not satisfactory in actual use.
Potential transformers will also have inherent defects due to the inherent physical and chemical properties of the insulating medium, such as insulating oil is flammable, SF6 insulating gas is not conducive to environmental protection, resin insulation will age due to processing methods and long use time, resulting in partial discharge levels Increase
The temperature change of the working environment will also cause changes in the parameters of the transformer, resulting in an increase in the error of the transformer

Method used

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  • Structure of ceramic electronic voltage transformer and application method of structure
  • Structure of ceramic electronic voltage transformer and application method of structure
  • Structure of ceramic electronic voltage transformer and application method of structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Such as figure 2 , 4 Or as shown in 5, a voltage transformer includes the following components:

[0052] A cylindrical ceramic body 1, one end of the cylindrical ceramic body 1 is provided with a blind hole 11 coaxial with it, the inner wall of the blind hole 11 is coated with a conductive glaze layer 12, and the height of the conductive glaze layer 12 is smaller than that of the blind hole. The depth of the hole 11, the outer wall of the ceramic body 1 corresponding to the conductive glaze layer 12 on the inner wall of the blind hole 11 is also coated with a conductive glaze layer 13, and the middle part of the conductive glaze layer 13 on the outer wall leaves a non-conductive glaze with a concave depth of b Blank area 14, the area of ​​the blank area 14 is about 1.5*1.5cm 2, the center of the blank area 14 is coated with a little conductive glaze as the test point 15, the diameter of the conductive glaze at the test point 15 is less than 5 mm, and one end of the i...

Embodiment 2

[0056] Such as image 3 , 4 Or as shown in 5, a voltage measurement device includes the following components:

[0057] Cylindrical ceramic body 1, the upper part of the cylindrical ceramic body 1 is a double shed structure 16, the center of the shed structure 16 is provided with a coaxial blind hole 11, the depth of the blind hole 11 is greater than the height of the shed structure 16, The inner wall of the lower part of the blind hole 11 is coated with a conductive glaze layer 12, the height of the conductive glaze layer 12 coated on the inner wall of the blind hole 11 is smaller than the distance from the bottom of the blind hole 11 to the shed structure 16, and the outer wall of the ceramic body 1 corresponds to the blind hole 11 The conductive glaze layer 12 on the inner wall is also coated with a conductive glaze layer 13, and a blank area 14 without conductive glaze with a concave depth of b is left in the middle of the conductive glaze layer 13 on the outer wall. The a...

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Abstract

The invention discloses a structure of a ceramic electronic voltage transformer. The structure comprises a cylindrical ceramic main body with a blind hole, a conductive metal round bar and a signal cable, wherein a conductive glaze layer is coated into the blind hole, the conductive glaze layer and a conductive paint layer are arranged on the external wall of the ceramic main body in sequence, a blank area without conductive glaze is reserved at the middle part of the conductive glaze layer on the external wall, a conductive glaze point is coated in the center of the blank area as a test point, the conductive metal round bar is fixedly arranged inside the blind hole of the cylindrical ceramic main body, and electrically connected with an internal cylindrical electrode on the internal wall of the blind hole, one end of the signal cable is connected with the test point, the other end of the signal cable is used as the voltage output end of the test point, and a high-voltage insulating tape is sleeved outside the conductive paint layer. The structure of the ceramic electronic voltage transformer has the advantages of high withstand voltage strength, high measurement accuracy and low cost.

Description

technical field [0001] The present invention relates to a structure of a transformer in a 6-40KV power frequency AC power system and its application method, in particular to a structure of a ceramic electronic voltage transformer in a 6-40KV power frequency AC power system and the device Applied manufacturing method. Background technique [0002] Potential transformers are important electrical equipment commonly used in power systems. Its main function is to safely isolate the high voltage on the primary side from the low voltage on the secondary side and convert the high voltage on the primary side into a proportional low voltage on the secondary side, providing measurement, metering and relay protection for subsequent instruments and meters. application. At present, traditional electromagnetic transformers are still commonly used in 6-40KV power frequency AC circuits. It has a complex structure, large volume, heavy weight, high requirements on product technology, and hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R15/18
Inventor 林纪秋林琳
Owner 林纪秋