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Main electrode structure and preparation method for flexible direct current transmission

A flexible DC power transmission, main electrode technology, applied in circuits, electrical components, spark plugs, etc., can solve the problems of high-power pulse triggering gap conduction current, low trigger gap reliability, etc., to achieve high strength, high mechanical strength, low temperature effect

Active Publication Date: 2020-12-25
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the large conduction current of the high-power pulse trigger gap, the temperature of the main plate rises rapidly, and the temperature can rise to thousands of degrees Celsius. The current insulating support structure is difficult to meet its requirements, making the reliability of the existing trigger gap low.

Method used

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  • Main electrode structure and preparation method for flexible direct current transmission
  • Main electrode structure and preparation method for flexible direct current transmission

Examples

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preparation example Construction

[0047] like figure 2As shown, a method for preparing the main electrode structure 1 for flexible DC power transmission includes the following steps:

[0048] In the first step, the ceramic support structure 2 is processed into a cylindrical body, and the inner wall of the cylinder is processed with a first internal thread matched with the first external thread;

[0049] In the second step, at least one heat conduction channel 4 is etched inside the cylinder;

[0050] In the third step, the first internal thread connects the first external thread to assemble the ceramic support structure 2 and the main electrode 1 , and the second internal thread connects the first external thread to assemble the mounting seat 3 and the main electrode 1 .

[0051] In one embodiment, the method includes,

[0052] The machinable ceramic is used as the support material, which has high resistivity, which can ensure low leakage current and low heat generation; in addition, high mechanical strengt...

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Abstract

The invention discloses a main electrode for flexible direct-current power transmission and a preparation method. According to the main electrode for the flexible direct-current power transmission, the main electrode comprises a first external thread; a ceramic support structure which sleeves on the main electrode and comprises a first internal thread in threaded connection with the first externalthread and at least one heat conduction channel for a cooling medium to pass through, wherein the heat conduction channel is arranged in the ceramic support structure; and a mounting base which is connected with the main electrode in a sleeved mode and comprises a second internal thread connected with the first external thread in a threaded mode, wherein the bottom surface of the mounting base abuts against the top surface of the ceramic support structure.

Description

technical field [0001] The invention relates to the technical field of flexible direct current transmission, in particular to a main electrode structure and preparation method for flexible direct current transmission. Background technique [0002] In the flexible DC transmission project, when a short-circuit fault occurs on the AC side, the short-circuit current rises very rapidly, and the DC switch is required to be disconnected quickly to reduce the expected fault current value; in addition, the current forced zero-crossing type DC switch is also expected to have a switch that can Discharge the capacitor quickly after a fault to create a current zero. [0003] In the above occasions, the traditional switchgear can no longer fully meet the needs of use, and it is necessary to use high-power pulses to trigger the gap. Its trigger on-time can be shortened to tens of ns, the flow current can reach several 10kA, the capacity can reach thousands of coulombs, and it has a high w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01T1/00H01T14/00H01T21/00
CPCH01T1/00H01T14/00H01T21/00
Inventor 刘轩东李晓昂张乔根
Owner XI AN JIAOTONG UNIV