High-sensitivity insulation inspection system and method for electrolytic aluminum direct-current power supply system

Abstract

The invention relates to the technical field of aluminum electrolysis, in particular to a high-sensitivity insulation inspection system and method for an electrolytic aluminum direct-current power supply system, the direct-current power supply system is arranged in an electrolytic workshop, the electrolytic workshop is provided with a plurality of electrolytic sections, each electrolytic section is provided with a plurality of electrolytic cells, and the direct-current power supply system comprises a bus. The bus is connected with each electrolytic cell, the insulation inspection system comprises a plurality of voltage monitoring devices, each electrolysis workshop section is provided with one voltage monitoring device, and the voltage monitoring devices are connected with the bus and used for monitoring the voltage to ground of the positive bus and the negative bus of the electrolysis workshop where the voltage monitoring devices are located. And one voltage monitoring device is arranged in each electrolysis section, so that rapid troubleshooting of insulation damage points is realized, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum electrolysis, and in particular to a high-sensitivity insulation inspection system and method for an aluminum electrolysis DC power supply system. Background Art

[0002] In the electrolytic aluminum production process, insulation technology is crucial to ensure equipment and personal safety, reduce power loss, and maintain the stability of the production process. The insulation problems of electrolytic cells and electrolytic series need to be solved through standardized management and scientific monitoring methods. Through real-time monitoring, fault warning, fault location and data analysis, the incidence of electrical accidents can be effectively reduced, production efficiency can be improved, and production costs can be reduced. With the rapid development of the electrolytic aluminum industry, the voltage and current levels of electrolytic cells and rectifier equipment are constantly increasing. In this high voltage, high current, and strong magnetic field environment, higher requirements are placed on insulation and monitoring technology. For the DC production system of the electrolytic aluminum workshop, it is very necessary to do a good job of online insulation monitoring as the voltage increases. It is also one of the indispensable tasks when designing a large-scale electrolytic aluminum power supply rectifier, which is of great significance to ensure the safety and stable operation of the workshop.

[0003] At present, the insulation inspection device of DC system at home and abroad only has one total voltmeter, which monitors the voltage between the positive and negative busbars of the DC system and the ground. When the insulation is normal, the voltage values ​​of the positive and negative poles are close to equal. When the insulation is damaged, the voltage will drop. Therefore, the insulation damage can be known through the value change of the total voltmeter. However, due to the large area of ​​the electrolysis workshop, which currently has a length of 1 kilometer and has more than 300 electrolytic cells, it takes a lot of manpower and time to find the specific location of the insulation damage after the insulation damage is found. Not only is the labor intensity of the workers high, but it also seriously slows down the production progress. Summary of the invention

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a high-sensitivity insulation inspection system and method for an electrolytic aluminum DC power supply system. By arranging a voltage monitoring device in each electrolysis section, rapid inspection of insulation damage points is achieved, thereby improving work efficiency.

[0005] In order to achieve the above object, the main technical solutions adopted by the present invention include: A high-sensitivity insulation inspection system for a DC power supply system for aluminum electrolysis, wherein the DC power supply system is arranged in an electrolysis workshop, wherein the electrolysis workshop has a plurality of electrolysis sections, each of which has a plurality of electrolysis cells, and the DC power supply system comprises a bus bar, wherein the bus bar is connected to each electrolysis cell, and the insulation inspection system comprises a plurality of voltage monitoring devices, wherein each electrolysis section is provided with a voltage monitoring device, wherein the voltage monitoring device is connected to the bus bar and is used for monitoring the voltage to ground of the positive bus bar and the negative bus bar of the electrolysis workshop.

[0006] By installing a voltage monitoring device in each electrolysis section, the insulation damage points can be quickly checked and the work efficiency is improved.

[0007] Furthermore, a voltage monitoring device is provided on the DC power supply inlet side of the electrolysis workshop.

[0008] By setting a voltage monitoring device on the DC power supply incoming line side, series voltage monitoring of the electrolysis workshop is achieved.

[0009] Furthermore, the voltage monitoring device arranged in the electrolysis section is arranged in the corridor.

[0010] Furthermore, the voltage monitoring device is a voltmeter.

[0011] Furthermore, the voltage signal collected by the voltage monitoring device is connected to the integrated automatic protection system of the rectifier station, and the integrated automatic protection system is used to collect signals and compare voltage values.

[0012] By connecting to the integrated automatic protection system of the rectifier station, computer monitoring is realized, which improves work efficiency compared with manual reading one by one.

[0013] A high-sensitivity insulation inspection method for an electrolytic aluminum DC power supply system adopts a high-sensitivity insulation inspection system for an electrolytic aluminum DC power supply system, comprising the following steps: S1. Compare the positive busbar-to-ground voltage and the negative busbar-to-ground voltage values ​​collected by the voltage monitoring device. When the two values ​​are equal, it is recorded as good insulation. When the two values ​​decrease, the voltage monitoring device alarms; S2. The staff obtains the electrolysis section where the insulation damage point is located based on the voltage value changes measured by each voltage monitoring device; S3. In the electrolysis section where the insulation damage point is located, check the installation of the electrolytic cell and the supporting facilities one by one to see if they are grounded, so as to obtain the accurate insulation damage point and shorten the troubleshooting time; shorten the troubleshooting time.

[0014] The beneficial effects of the present invention are: The invention discloses a high-sensitivity insulation inspection system and method for an electrolytic aluminum DC power supply system. By setting a voltage monitoring device in each electrolysis section, the rapid inspection of insulation damage points is realized, the work efficiency is improved, and a solution is provided for the current problem of zero-point drift of the DC power supply system in the electrolysis workshop. In addition, the segmented monitoring has high sensitivity, and hidden dangers can be discovered and handled in time, effectively avoiding the occurrence of vicious accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram of a high-sensitivity insulation inspection system for a DC power supply system for electrolytic aluminum according to the present invention. DETAILED DESCRIPTION

[0016] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below in conjunction with the accompanying drawings through specific embodiments. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a clearer and more thorough understanding of the present invention and to be able to fully convey the scope of the present invention to those skilled in the art.

[0017] like Figure 1 As shown, a high-sensitivity insulation inspection system for a DC power supply system for electrolytic aluminum is provided, wherein the DC power supply system is arranged in an electrolysis workshop, wherein the electrolysis workshop has a plurality of electrolysis sections, each electrolysis section has a plurality of electrolysis cells, the DC power supply system comprises a bus bar, wherein the bus bar is connected to each electrolysis cell, and the insulation inspection system comprises a plurality of voltage monitoring devices, wherein each electrolysis section is provided with a voltage monitoring device, wherein the voltage monitoring device is connected to the bus bar, and is used for monitoring the voltage to ground of the positive bus bar and the negative bus bar of the electrolysis workshop.

[0018] By installing a voltage monitoring device in each electrolysis section, the insulation damage points can be quickly checked and the work efficiency is improved.

[0019] The specific connection of the voltage monitoring device is the existing technology. Figure 1 The connection position of the voltage monitoring device is shown in the figure. Those skilled in the art can complete the connection according to the figure, which will not be repeated here.

[0020] Specifically, a voltage monitoring device is provided on the DC power supply inlet side of the electrolysis workshop.

[0021] By setting a voltage monitoring device on the DC power supply incoming line side, series voltage monitoring of the electrolysis workshop is achieved.

[0022] Specifically, the voltage monitoring device arranged in the electrolysis section is arranged in the corridor.

[0023] Specifically, the voltage monitoring device is a voltmeter.

[0024] Specifically, the voltage signal collected by the voltage monitoring device is connected to the integrated automatic protection system of the rectifier station, and the integrated automatic protection system is used to collect signals and compare voltage values.

[0025] By connecting to the integrated automatic protection system of the rectifier station, computer monitoring is realized, which improves work efficiency compared with manual reading one by one.

[0026] The integrated automated protection system is an existing technology that has been applied in the industry to achieve on-site situation monitoring. The specific construction of the system will not be described in detail here.

[0027] A high-sensitivity insulation inspection method for an electrolytic aluminum DC power supply system adopts a high-sensitivity insulation inspection system for an electrolytic aluminum DC power supply system, comprising the following steps: S1. Compare the values ​​of the positive busbar-to-ground voltage and the negative busbar-to-ground voltage collected by the voltage monitoring device. When the values ​​are equal, it is recorded as good insulation. When the values ​​are reduced, the voltage monitoring device alarms. The equality includes complete equality and near equality. The near range is determined by technicians in this field according to actual conditions. When insulation damage occurs, the insulation resistance of the positive busbar or the negative busbar to the ground decreases, and the ground-to-ground voltage decreases accordingly. At this time, the voltage monitoring device alarms. S2. The staff obtains the electrolysis section where the insulation damage point is located based on the voltage value changes measured by each voltage monitoring device; S3. In the electrolysis section where the insulation damage point is located, check the installation of the electrolytic cell and the supporting facilities one by one to see if they are grounded, and get the accurate insulation damage point; shorten the troubleshooting time.

[0028] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A high-sensitivity insulation inspection system for a DC power supply system for aluminum electrolysis, wherein the DC power supply system is arranged in an electrolysis workshop, wherein the electrolysis workshop has a plurality of electrolysis sections, each of which has a plurality of electrolysis cells, and wherein the DC power supply system comprises a busbar connected to each electrolysis cell, wherein: The insulation inspection system includes a plurality of voltage monitoring devices. Each electrolysis section is provided with a voltage monitoring device. The voltage monitoring device is connected to the busbar and is used to monitor the ground voltage of the positive busbar and the negative busbar of the electrolysis workshop.

2. A high-sensitivity insulation inspection system for a DC power supply system for electrolytic aluminum according to claim 1, characterized in that: A voltage monitoring device is provided on the DC power supply inlet side of the electrolysis workshop.

3. A high-sensitivity insulation inspection system for a DC power supply system for electrolytic aluminum according to claim 1, characterized in that: The voltage monitoring device arranged in the electrolysis section is arranged in the corridor.

4. A high-sensitivity insulation inspection system for a DC power supply system for electrolytic aluminum as claimed in claim 2, characterized in that: The voltage monitoring device is a voltmeter.

5. A high-sensitivity insulation inspection system for a DC power supply system for electrolytic aluminum as claimed in claim 2, characterized in that: The voltage signal collected by the voltage monitoring device is connected to the integrated automatic protection system of the rectifier station, and the integrated automatic protection system is used to collect signals and compare voltage values.

6. A high-sensitivity insulation inspection method for a DC power supply system for aluminum electrolysis, using a high-sensitivity insulation inspection system for a DC power supply system for aluminum electrolysis as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Compare the positive busbar-to-ground voltage and the negative busbar-to-ground voltage values ​​collected by the voltage monitoring device. When the two values ​​are equal, it is recorded as good insulation. When the two values ​​decrease, the voltage monitoring device alarms; S2. The staff obtains the electrolysis section where the insulation damage point is located based on the voltage value changes measured by each voltage monitoring device; S3. In the electrolysis section where the insulation damage point is located, check the installation of the electrolytic cell and the supporting facilities one by one to see if they are grounded, obtain the accurate insulation damage point, and shorten the troubleshooting time.

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