An Intelligent Arc Protection System

A protection system and arc light technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problems of switchgear field expansion modules without display, arc light protection, and on-site debugging inconvenience, etc., to achieve high electrical anti-interference, Increased flexibility, short action time effect

Active Publication Date: 2017-09-22
NANJING INTELLIGENT APP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large number of arc channels and complicated wiring, the general arc protection system can only protect one or two sections of busbars. When the system operates on multiple busbars, multiple sets of protection systems are required, and arc protection usually does not have selective tripping function, which tends to expand the scope of failure and bring unnecessary economic losses
The general arc protection system does not have a display when it is installed in the on-site expansion module of the switch cabinet. When debugging, it is necessary to apply an arc signal on the site, and then check whether the arc is detected on the remote main control unit. Debugging brings a lot of inconvenience

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The arc protection system of the present invention is composed of a main control unit and several expansion units.

[0046] Such as figure 1 As shown, the main control unit of the arc protection system includes a power supply and a binary input board, a main board, a communication management board, a man-machine interface board, an arc main control board, and an analog board. Described main board is made up of MCU, FPGA, Flash, AD sampling circuit etc.; Described communication management board is made up of MCU, communication circuit; Described man-machine interface board is made up of LCD liquid crystal and button and interface circuit; So The above-mentioned arc main control board is composed of MCU and FPGA; the above-mentioned analog quantity board is composed of voltage and current sensors; the power supply and binary input quantity board is composed of a power supply module and a binary input quantity input module for providing unit work.

[0047] After the volta...

Embodiment 2

[0066] Typical protection schemes of the present invention, such as Figure 4 shown.

[0067] The main control unit collects the current of four lines DL1, DL2, DL5, and DL6 and the arc signals of all switch cabinets on the three-section bus on the low-voltage side of the transformer. The protection configuration settings are as follows:

[0068] Arc protection 1 is associated with all arc signals of bus section I and the current associated with DL1 and DL5, and the protection outlet matrix is ​​configured as two outlets jumping DL1 and jumping DL5;

[0069] Arc protection 2 is associated with all arc signals of the second section of the bus, associated with the current of DL5 and DL6, and the protection outlet matrix is ​​configured as jumping DL5 and jumping DL6;

[0070] Arc protection 3 is associated with all arc signals of the busbar in Section III and the current of DL2 and DL6, and the protection outlet matrix is ​​configured as two outlets jumping DL2 and jumping DL6...

Embodiment 3

[0075] The main control unit can also be directly inserted into the arc light acquisition board without using the arc light main control board, and connected to the arc light acquisition probe through a special plastic optical fiber to collect on-site arc light signals, which are directly transmitted to the main board after being processed by the MCU inside the acquisition board, thus directly forming a A complete arc protection system saves the use of expansion units and saves costs. This scheme is selected when the number of arc points on site is small and the distances are relatively close.

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PUM

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Abstract

The invention discloses an intelligent arc light protection system, which belongs to the field of power transformation, power distribution and power utilization. The invention consists of an arc main control unit and an arc extension unit. The main control unit includes a power supply and binary input board, a main board, a communication management board, a man-machine interface board, an arc main control board, and an analog board. The expansion unit includes a power supply board, a main board, a display board, an arc light collection board and an on-site arc light collection probe. The action time of the arc protection system provided by the present invention is relatively short; the extension unit can add the arc signal to the address code. The main control unit can identify the arc channel according to the address code in the arc signal, which simplifies the wiring process and improves the efficiency of on-site construction. ; The protection system can identify abnormal channels and reduce the false alarm rate; the arc and current associated with the protection can be set flexibly, and the selective tripping function of the arc protection can be realized after appropriate associated settings.

Description

technical field [0001] The invention relates to an intelligent arc protection system, which belongs to the field of power transformation, power distribution and power utilization. Background technique [0002] Arcing short circuits are the most serious faults in distribution networks, especially when they occur inside medium and low voltage switchgears. Due to the large arc resistance, the short-circuit current often does not reach the over-current and quick-break setting values, so it cannot act quickly to cut off the fault. The continuous combustion of the arc released huge energy, which caused catastrophic consequences, and the switchgear was severely burned. In addition, the arc short-circuit fault of the switchgear is often not cleared in time, and develops into a medium-voltage bus fault, which is very harmful. The best way to solve the above problems is to quickly detect the arc light generated when the accident occurs, and quickly remove the fault through the judgm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/22
Inventor 张杭陈国富
Owner NANJING INTELLIGENT APP
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