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Lightning-protection trip automatic arc blow-out parallel gap system for power distribution network

A technology for preventing lightning strikes and power distribution networks, applied in circuits, spark gaps, electrical components, etc., to achieve a wide range of effects

Active Publication Date: 2017-12-15
ZHANJIANG POWER SUPPLY BUREAU OF GUANGDONG POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention overcomes the defects in the existing line lightning protection measures and provides a new lightning protection trip self-extinguishing parallel gap system for distribution network

Method used

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  • Lightning-protection trip automatic arc blow-out parallel gap system for power distribution network
  • Lightning-protection trip automatic arc blow-out parallel gap system for power distribution network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0049] Embodiment specific implementation process:

[0050] When a lightning accident occurs, the two metal electrodes 3 and the two ends of the insulator 1 are connected in parallel to form a parallel gap, and the parallel gap generates an arc flashover before the insulator. The voltage detection unit 7 arranged on the metal electrode 3 detects the arc flashover generated by the metal electrode 3, and transmits the detection signal to the single-chip microcomputer through the photoelectric isolation connection. The single-chip microcomputer controls the thyristor to determine the input time of the magnetic blowing coil. When the thyristor is closed, the magnetic blowing coil forms a complete circuit, using the energy provided by the flashover current to generate a magnetic field to elongate the arc. The arc moves away from the insulator 1 and enters the arc chute 5 . The arc is divided into segments and the arc is extinguished. The arc chute cover 4 shields the arc enterin...

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Abstract

The invention irons out the defects of conventional line lightning protection measures, and provides a new lightning-protection trip automatic arc blow-out parallel gap system for a power distribution network. The system comprises a voltage detection unit, a control unit, two metal electrodes, and an automatic arc blow-out unit. The two metal electrodes are respectively electrically connected with two ends of an insulator, and a voltage detection unit is disposed on the metal electrodes. A signal output end of the voltage detection unit is connected with a signal input end of the control unit, and a signal output end of the control unit is connected with the automatic arc blow-out unit. The system is wide in application range, can adjust the distance of parallel gaps of different power distribution lines, and can achieve the flexible adjustment of the lines with different relay protection parameters. Arc extinguishing energy comes from lightning, and there is no need to obtain additional energy from a line or in other modes. Finally, the system can flexibly adjust the switching time of a coil according to the size of different lightning overvoltages, and guarantees no tripping while releasing the lightning overvoltage.

Description

technical field [0001] The invention relates to the field of lightning protection tripping, and more specifically, to a self-extinguishing arc parallel gap system for lightning protection tripping of a distribution network. Background technique [0002] With the deepening of the national "smart grid" construction, power supply companies and power users have put forward higher requirements for the safety and reliability of power supply of distribution network. Because the distribution network is directly related to the quality of power supply and economic benefits. As a powerful natural disaster that cannot be suppressed, lightning not only threatens the safety of human life, but also causes damage to power transmission and distribution lines, electrical equipment and other equipment. Therefore, it is of great significance to take reasonable lightning protection measures. [0003] Lightning protection measures for lines, such as installation of lightning protection lines, in...

Claims

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Application Information

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IPC IPC(8): H01B17/46H01B17/48H01T1/04H01T4/08H01T4/10
CPCH01T1/04H01T4/08H01T4/10H01B17/46H01B17/48Y04S10/52
Inventor 黄观荣黄国栋王平波刘建明李知城欧英龙黄锐杰戴宇龙雄峰
Owner ZHANJIANG POWER SUPPLY BUREAU OF GUANGDONG POWER GRID CO LTD
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