High efficient laminated graphic discharge gap device

A discharge gap and stacked technology, which is applied in the direction of circuits, spark gaps, electrical components, etc., can solve the problem of unexplained sparkover suppression, the uncertainty of the constant value or value range of the voltage equalizing capacitor, and the undetermined discharge electrode material And other problems, to achieve the effect of controlling the ignition breakdown voltage, no arc leakage, and protecting safety

Active Publication Date: 2009-08-19
SICHUAN ZHONGGUANG LIGHTNING PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of spark gap device has the following disadvantages: 1. Due to the uncertainty of CL in the above formula, it brings uncertainty in the fixed value or value range of the voltage equalizing capacitor; 2. The above formula is based on 1.2 / The reference improvement value under the impact of 50μs lightning waveform, while the situation under the impact of the other two lightning test waveforms (8 / 20μs, 10 / 350μs) is not explained; 3. The description of the device does not explain the problem of sparkover suppression, Also did not determine the discharge electrode material

Method used

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  • High efficient laminated graphic discharge gap device
  • High efficient laminated graphic discharge gap device
  • High efficient laminated graphic discharge gap device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The circuit structure of the high-efficiency graphite laminated discharge gap device in this embodiment is as follows Figure 4 As shown, it includes eight graphite discharge gaps, a π-shaped connection capacitor group 1 composed of seven capacitors with the same capacitance value, a current fuse 2 and an indicating circuit 3 . Each graphite discharge gap is connected in series, wherein, the first graphite discharge gap F 1 Connect with live wire, the last discharge gap F 8 Grounded, π-shaped connection to each capacitor C in the capacitor bank 1 、C 2 、C 3 、C 4 、C 5 、C 6 、C 7 One end is connected to the conductive part between the two graphite discharge gaps, and the other end is grounded; the end of the π-shaped connection capacitor group circuit is connected to the current fuse 2; one end of the indicating circuit is connected to the first graphite discharge gap F 1 On the connecting piece with the live wire L, the other end is grounded. The structure of indi...

Embodiment 2

[0060] The circuit structure of the high-efficiency graphite laminated discharge gap device in this embodiment is as follows figure 1 As shown, it includes nine graphite discharge gaps and a π-shaped connection capacitor group 1 composed of eight capacitors with the same capacitance value, and each graphite discharge gap is connected in series, wherein the first graphite discharge gap F 1 Connect with live wire, the last discharge gap F 9 Grounding, one end of each capacitor in the π-shaped connection capacitor group is connected to the conductive member between the two graphite discharge gaps, and the other end is grounded.

[0061] In the above circuit, the value of each capacitor of the π-shaped connection capacitor group is determined according to C=In / 2πfVK, where In=I / N=3.2 / 8A, f≈18×10 3 Hz, V=3000V, K=3, into the above formula calculation, C≈390pF.

[0062] The electronic components in the above circuit are assembled in Figure 5 In the box body 13 shown, the size of...

Embodiment 3

[0065] The circuit structure of the high-efficiency graphite laminated discharge gap device in this embodiment is as follows figure 2 As shown, it includes ten graphite discharge gaps, a π-connected capacitor group 1 composed of nine capacitors with the same capacitance value, and a current fuse 2 . Each graphite discharge gap is connected in series, wherein, the first graphite discharge gap F 1 Connect with live wire, the last discharge gap F 10 Grounding, one end of each capacitor in the π-shaped connection capacitor group is connected to the conductive member between the two graphite discharge gaps, the other end is grounded, and the end of the π-shaped connection capacitor group circuit is connected to the current fuse 2 .

[0066] In the above circuit, the value of each capacitor of the π-shaped connection capacitor group is determined according to C=In / 2πfVK, where In=I / N=4.5 / 9 A, f≈18×10 3 Hz, V=3000V, K=2, into the above formula calculation, C≈737pF.

[0067] The e...

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Abstract

High-efficiency laminated graphite discharge gap device, including N+1 discharge gaps and a π-shaped connection capacitor group composed of N capacitors with the same capacitance value, each discharge gap is connected in series, the first discharge gap F1 is connected to the live wire, the last one The discharge gap FN+1 is grounded, and one end of each capacitor in the π-shaped connection capacitor group is connected to the conductive part between the two discharge gaps, and the other end is grounded. The discharge gap is a graphite discharge gap, and an insulating ring gasket is placed between the graphite electrodes. , each graphite discharge gap is stacked and assembled, and the parameters of each capacitor in the π-shaped connection capacitor group are selected according to the formula C=In / 2πfVK, in the formula: In is the induced discharge current on the capacitor in the π-shaped connection capacitor group, In=I / N, I is the total current of the π-connected capacitor group, N is the number of capacitors in the π-connected capacitor group, f is the frequency of the lightning wave, V is the rated voltage on the capacitor in the π-connected capacitor group, and K is the safety factor ≥ 1 . The device can also be provided with a current fuse and an indicating circuit.

Description

technical field [0001] The invention relates to a discharge gap device carrying lightning current, which is mainly used for the first-level lightning protection of a power supply system, so as to prevent various communication base stations, substations, and power electronic equipment from being damaged by direct lightning or lightning induction. Background technique [0002] There are various structures of lightning protection discharge gap devices currently used. The anti-lightning discharge gap device adopting a single-pole metal (claw horn) gap is one of them. Due to the requirements of the safety distance standard, the metal gap gap of this type of discharge gap device cannot be reduced and increased at will, because there is an irreconcilable contradiction between the safety distance and the discharge voltage for lightning starting; another problem is that this type of device works When the arcing occurs, the surrounding equipment will be seriously damaged by arcing. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01T4/16
Inventor 王德言阮建中雷成勇易代献朱成杨国华
Owner SICHUAN ZHONGGUANG LIGHTNING PROTECTION TECH
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