Distribution system concentrated ground protection and lightning protection device and system

A centralized grounding and lightning protection technology, applied in emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, circuit devices, etc. Difficulty and other problems, to achieve the effect of preventing the counterattack of ground potential, good protection effect, and relaxing requirements

Active Publication Date: 2013-11-06
SHENZHEN YZ TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the existence of soil resistivity, especially in areas with high soil resistivity (such as high mountains), it is very difficult to achieve a grounding device that meets a small grounding resistance, and it is not only necessary to build a large-area grounding grid , using a large amount of steel and drag-reducing agent, and also facing the problem of difficult coordination between the grounding grid construction and the local management department
[0008] (2) The existing grounding technology and lightning protection method is to use the grounding wire to connect with the local grounding device to provide a discharge channel for the lightning current. The remote end in the distribution system
Therefore, the grounding method has brought great trouble to the construction of the ne

Method used

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  • Distribution system concentrated ground protection and lightning protection device and system
  • Distribution system concentrated ground protection and lightning protection device and system
  • Distribution system concentrated ground protection and lightning protection device and system

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Example 1: Please refer to the attached figure 2 , figure 2 It is one of the principles of realizing the centralized grounding of the AC neutral line in the AC power supply system of the present invention. It is composed of a power supply protection unit and a grounding protection unit. The module is composed of the front-stage SPD module including the varistor RV1 and the gas discharge tube G1 in series, the varistor RV2 and the gas discharge tube G2 in series, and the series connected varistor RV1 and the gas discharge tube G1 are connected across the live wire and zero Between the lines, the series-connected varistor RV2 and the gas discharge tube G2 are connected between the neutral line and the grounding protection unit. The post-stage SPD module includes the varistor RV3 and the gas discharge tube G3 in series, and the lightning current suppression device inductance L1 , the inductor L2 is formed, the inductor L1 is connected in series on the live wire between ...

Embodiment 2

[0046] Example 2: Please refer to the attached image 3 , the structure of this embodiment is basically the same as that of the first embodiment, the difference is that the front-stage SPD module only includes the varistor RV1 and the gas discharge tube G1 connected in series, and the grounding protection unit includes an inductor L3.

Embodiment 3

[0047] Embodiment 3: Please refer to the attached Figure 4 , the structure of this embodiment is basically the same as that of the second embodiment, the difference is that, compared with the second embodiment, the latter-stage SPD module lacks the varistor RV2 and the gas discharge tube G2 connected in series.

[0048] The second embodiment and the third embodiment are the other two circuit diagrams of the present invention for realizing the centralized grounding of the AC neutral line in the AC power supply system, which are all within the protection scope of the present invention, but are not limited to only these three protection principles. The combination of a form of SPD with a lightning current suppression device is also within the scope of the present invention.

[0049] Method 2: Implement centralized grounding protection through the positive line of the DC power supply.

[0050] Since the source terminal (BBU) in the network distribution system has its DC positive...

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PUM

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Abstract

Disclosed is a distribution system concentrated ground protection and lightning protection device and system. The distribution system concentrated ground protection and lightning protection device comprises a power source protection unit and a ground protection unit, an external power source supplies protected devices with power through the power source protection unit, the device ground PE (protecting earthing) ends of the protected devices are connected with a concentrated ground wire through the ground protection unit for grounding, and according to the system, all RRUs (Radio Remote Units) are subjected to concentrated grounding through the concentrated ground wire by all BBUs (Building Base band Units) of more than one protected device. Due to the fact that a concentrated grounding technology is utilized in the distribution system concentrated ground protection and lightning protection device and system, grounding can be performed through alternating current null wires or direct current positive wires, and concentrated grounding can also be achieved through power cable shielded wires or by adding a protective ground wire to a power cable.

Description

technical field [0001] The invention discloses the field of grounding protection and lightning protection, and relates to a centralized grounding protection and lightning protection method and device based on a network distribution system. Background technique [0002] There are millions of lightning strikes in nature every year, and the damage caused by lightning has risen to the third place in natural disasters. In China alone, the number of casualties caused by lightning strikes reaches 3,000 to 4,000 people and property losses reach 5 billion to 10 billion yuan each year. [0003] The scope of lightning disasters covers almost all walks of life. Advanced microelectronic equipment such as measurement, monitoring, protection, communication, and computer network with large-scale integrated circuits as the core components are widely used in electric power, aviation, national defense, communication, radio and television, finance, transportation, petrochemical, medica...

Claims

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Application Information

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IPC IPC(8): H02H9/04H02H9/02H02H9/06
Inventor 张庭炎刘先绿汤文
Owner SHENZHEN YZ TECH
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