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Online service life monitoring system for low-voltage conductors of three-phase alternating-current submerged arc furnace

Active Publication Date: 2021-05-28
SUZHOU SURONG ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Submerged arc furnace design and equipment manufacturing are also mainly to passively reduce conductor accidents from the aspects of increasing the conductor cross section to reduce the current density, optimizing the structure design, strengthening the cooling effect, and improving the manufacturing quality, which increases the equipment cost

Method used

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  • Online service life monitoring system for low-voltage conductors of three-phase alternating-current submerged arc furnace
  • Online service life monitoring system for low-voltage conductors of three-phase alternating-current submerged arc furnace
  • Online service life monitoring system for low-voltage conductors of three-phase alternating-current submerged arc furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A three-phase AC submerged arc furnace low-voltage conductor online life monitoring system, the monitoring system includes the following monitoring steps:

[0034] Step 1) Monitor the currents of all the parallel conductors of each conductive section on the low-voltage side of the submerged arc furnace to obtain vector current signals;

[0035] Step 2) Input the vector current signal and conductor design / actual measurement parameters into the control processor;

[0036] Step 3) The control processor passes the corresponding vector correlation and space timing algorithm according to the received signal parameters, and through the inspection of the conductor material and structure expert system, judges the conductor accident and early warning, obtains the life trend and the inspection and maintenance reminder cycle.

[0037] In the step 1), first build the monitoring system low-voltage short network: such as figure 1 As shown, each electrode K is connected end-to-end in ...

Embodiment 2

[0048] Implementation of water-cooled cable conductor (current) monitoring

[0049] The implementation of water-cooled cable conductor (current) monitoring is basically the same as that of electrode conductor (current) monitoring, the difference is that the Rogowski coil is installed at the front end of the water-cooled cable, and the current does not need to be synthesized; the integral processor and control processor are also installed in the box , Man-machine interface and other independent installations, can be installed on the box or in an easy-to-observe place.

Embodiment 3

[0051] The Implementation of Monitoring the Secondary Side Coil Conductor (Current) of Furnace Transformer

[0052] The implementation of the secondary side coil conductor (current) monitoring of the furnace transformer is basically the same as that of the electrode conductor (current) monitoring, the difference is that the Rogowski coil is installed at the front end of the water-cooled cable, and the current does not need to be synthesized; Installed in the box, the human-machine interface and other independent installations can be installed on the box or in a place that is easy to observe.

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Abstract

The invention relates to an online service life monitoring system for low-voltage conductors of a three-phase alternating-current submerged arc furnace. The monitoring system comprises the following monitoring steps: 1) monitoring currents of all parallel conductors of each conductive cross section of the low-voltage side of the submerged arc furnace to obtain vector current signals; 2) inputting the vector current signals and conductor design / actual measurement parameters into a control processor; and 3) enabling the control processor to judge conductor accidents and performs early warning according to the received signal parameters through corresponding vector correlation and a space time sequence algorithm and through conductor material and structure expert system inspection, so as to obtain a life trend and an inspection and maintenance prompt period. According to the invention, conductor accidents can be accurately pre-warned, conductor maintenance can be prompted, all parallel conductor working and accident processes can be accurately recorded, the forced shutdown loss caused by the conductor accidents can be greatly reduced, the application range is wide, and the method can also be used for similar alternating current large-current load circuits.

Description

technical field [0001] The invention relates to the technical field of low-voltage and high-current load life monitoring, in particular to an online life monitoring system for low-voltage conductors of a three-phase AC submerged arc furnace. Background technique [0002] The submerged arc furnace electric furnace transformer (hereinafter referred to as "furnace transformer") outputs the low-voltage current required for production, and sends it to the electrode through the low-voltage short network, flexible cable, and electrode conductor to provide the energy required for smelting the charge. The complex electrical system of the submerged arc furnace The circuit includes the primary (high voltage) side of the electric furnace transformer, the tertiary (series voltage regulation) medium voltage side, the secondary low voltage side, the low voltage short network, the electrode, the conductive charge, the arc (in the production process), the furnace bottom and the furnace wall c...

Claims

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Application Information

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IPC IPC(8): G01R31/00
CPCG01R31/00Y02P10/25
Inventor 陶文戈杨荣李亚杰沈健
Owner SUZHOU SURONG ELECTRIC
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