Method for reducing current interference of cell control machine series

Abstract

The invention provides a method for reducing current interference of a cell control machine series, and the method comprises the steps: carrying out the data collection of a current signal interference frequency of a cell control unit, and obtaining a first frequency; collecting the fault times of the internal equipment of the slot control unit, and comparing the fault times to obtain a fault part; troubleshooting the fault part to obtain a fault type; the fault types include unstable voltage of a switching power supply, poor quality of a terminal strip and dust covering of a signal adapter plug; and repairing the fault part according to the fault type to obtain an improved slot control unit. According to the method, the stability of the cell control system is improved, the power consumption of electrolytic aluminum production is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of slot control machines, and in particular to a method for reducing current interference in slot control machine series. Background Art

[0002] During the electrolytic aluminum production process, the slot control machine will collect the slot voltage and series current signals, perform analytical calculations based on the various set process parameters and related mathematical models, and complete the anode distance adjustment, shelling, material unloading, effect processing, aluminum tapping, pole change, busbar lifting process control and fault self-diagnosis in an automatic state. During this period, the stability of the series current signal is crucial to the control effect of the slot control machine. Once the series current fluctuates, especially when an effect (such as the flicker effect) occurs, the current will fluctuate violently, which will affect the control effect of the electrolytic cell, generate a lot of noise, and even cause high and low noise to appear over a large area.

[0003] The cell noise value is determined based on the maximum and minimum difference of the cell resistance change, and the resistance value is calculated based on the series current signal. If the calculation of the resistance value deviates, it will lead to a deviation in the judgment of the alumina concentration, which will directly affect the adjustment of the feeding cycle, making the cell condition unstable. If the series current interference of the cell control machine increases, it will lead to an increase in the abnormal cell pressure effect, and ultimately lead to an increase in the power consumption of aluminum electrolysis production. Therefore, it is very necessary to design a method to reduce the series current interference of the cell control machine. Summary of the invention

[0004] The object of the present invention is to provide a method for reducing current interference in a slot control machine series so as to improve the stability of the slot control system, thereby reducing power consumption in electrolytic aluminum production and improving production efficiency.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A method for reducing current interference of a slot control machine series comprises the following steps:

[0007] Data collection is performed on the interference frequency of the current signal of the slot-controlled unit to obtain a first frequency;

[0008] Collect the number of faults of the internal equipment of the slot control unit, compare the number of faults, and obtain the fault location;

[0009] Troubleshoot the faulty parts and get the fault type; the fault types include: unstable switching power supply voltage, poor quality of terminal block and signal adapter plug covered with dust;

[0010] The faulty part is repaired according to the fault type to obtain an improved slot-controlled unit.

[0011] Optionally, data collection is performed on the current signal interference frequency of the slot-controlled unit to obtain a first frequency. The specific steps are: collecting the current signal interference frequency of the slot-controlled unit through a current signal collection device, and calculating the occurrence frequency of the column current signal through the current signal interference frequency of the slot-controlled unit to obtain the first frequency.

[0012] Optionally, the internal equipment of the slot control unit includes: a signal distributor, a signal relay box and a slot control machine.

[0013] Optionally, the faulty part is repaired according to the fault type to obtain an improved slot-controlled unit, and the specific steps include:

[0014] Replace the ceramic capacitor inside the switching power supply with a monolithic capacitor;

[0015] Replace the terminal block with one that is resistant to oxidation;

[0016] Seal the faulty part.

[0017] Optionally, the method further includes: collecting data on the interference frequency of the current signal of the improved slot-controlled unit to obtain a second frequency, and comparing the first frequency with the second frequency to obtain a comparison result.

[0018] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects: the method for reducing the current interference of a slot-controlled machine series provided by the present invention comprises: collecting data on the current signal interference frequency of the slot-controlled unit to obtain a first frequency; collecting the number of failures of the internal equipment of the slot-controlled unit, and comparing the number of failures to obtain the fault location; troubleshooting the fault location to obtain the fault type; the fault types include: unstable switching power supply voltage, poor quality of the terminal block, and dust covering the signal adapter plug; repairing the fault location according to the fault type to obtain an improved slot-controlled unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 A flow chart of a method for reducing current interference of a slot control machine series according to an embodiment of the present invention;

[0021] Figure 2 This is an improved flow chart of the slot control unit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1 As shown, an embodiment of the present invention provides a method for reducing current interference of a slot control machine series, comprising the following steps:

[0025] Step 100: collecting data on the interference frequency of the current signal of the slot-controlled unit to obtain a first frequency.

[0026] Specifically, the current signal is a physical quantity representing current collection. The current signal interference frequency of the slot-controlled unit within three months before the improvement is collected through the current signal collection device, and a historical curve is generated on the terminal system. Then, the occurrence frequency of the column current signal being interfered is calculated based on the historical curve.

[0027] Step 200: Collect the number of faults of the internal equipment of the slot-controlled unit, and compare the number of faults to obtain the fault location.

[0028] Specifically, the current loop of the slot control machine series is mainly composed of three parts: the signal distributor, the signal relay box and the slot control machine. The number of failures of the signal distributor, the signal relay box and the slot control machine is collected, and the number of failures of each part is divided by the total number of failures to obtain their respective failure rates. The failure rates of the three devices are compared, and it is found that the signal relay box has the highest failure rate, and the signal relay box is determined to be the fault location.

[0029] Step 300: troubleshoot the fault location and obtain the fault type.

[0030] Specifically, the fault types include: unstable switching power supply voltage, poor quality of terminal blocks, and signal adapter plugs covered with dust.

[0031] Step 400: Repair the faulty part according to the fault type to obtain an improved slot-controlled unit. The specific steps include:

[0032] Step 401: Replace the ceramic capacitor inside the switching power supply with a monolithic capacitor.

[0033] Specifically, the main reason for the unstable voltage of the switching power supply is that the power output end is a ceramic capacitor with weak anti-interference ability. When the ambient temperature changes, its performance is unstable, which seriously affects the stability of the series current signal of the slot control machine. Replacing it with a monolithic capacitor with more stable temperature characteristics and smaller capacitance value changes in a wide temperature range can effectively prevent circuit parameter changes caused by temperature fluctuations, thereby ensuring the normal operation of the equipment under different environmental conditions, improving the reliability and stability of the operating circuit, improving the energy efficiency and safety of the equipment, reducing the failure rate of the equipment, and extending the service life of the equipment.

[0034] Step 402: Replace the terminal block with a terminal block having oxidation resistance.

[0035] Specifically, the terminal block in the original signal relay box is thin, the wire pressing is not tight, and the spring clips are easily oxidized. Replacing it with a terminal block with a large contact surface, regular spring clips, and not easy to oxidize can provide lower contact resistance, reduce heat and energy loss, and make current transmission more efficient. At the same time, the regular spring clip design strengthens the compression effect of the cable, reduces the risk of looseness and poor contact, and the anti-oxidation properties make the terminal block more reliable in humid or corrosive environments. By improving the connection quality of the terminal block, the reliability and stability of the electrical connection are improved, and the safety and durability of the equipment are improved.

[0036] Step 403: sealing the faulty part.

[0037] Specifically, the signal relay box has been operating in a high-dust environment for a long time, causing serious dust accumulation inside the box, resulting in poor contact of electronic components inside the box. A sealing strip is pasted on the door extension of the signal relay box to isolate the dust from entering the electrolysis workshop, thereby improving the dust-proof ability of the equipment and reducing the failure rate and maintenance costs.

[0038] Furthermore, a method for reducing current interference of a slot control machine series also includes: collecting data on the current signal interference frequency of the improved slot control unit to obtain a second frequency, and comparing the first frequency with the second frequency to obtain a comparison result.

[0039] Specifically, the method for collecting data on the current signal interference frequency of the improved slot-controlled unit is the same as step 100. The interference occurrence frequencies before and after the improvement are compared. The results show that the occurrence frequency of the current interference of the slot-controlled unit series is significantly reduced.

[0040] The beneficial effects of the present invention are as follows:

[0041] 1) By improving the fault location, the frequency of current interference in the slot control machine series is reduced, the reliability of the equipment is improved, the abnormal slot pressure effect and the power consumption of aluminum electrolysis production are reduced, thereby reducing production costs.

[0042] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0043] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for reducing current interference in a slot control machine series, characterized in that: The steps include: Data collection is performed on the interference frequency of the current signal of the slot-controlled unit to obtain a first frequency; Collect the number of faults of the internal equipment of the slot control unit, and compare the number of faults to obtain the fault location; Performing troubleshooting on the fault location to obtain the fault type; The fault types include: unstable switching power supply voltage, poor terminal block quality, and signal adapter plugs covered with dust; The faulty part is repaired according to the fault type to obtain an improved slot-controlled unit.

2. The method for reducing current interference of slot control machine series according to claim 1, characterized in that: Data collection is performed on the current signal interference frequency of the slot-controlled unit to obtain a first frequency. The specific steps are: collecting the current signal interference frequency of the slot-controlled unit through a current signal collection device, and calculating the occurrence frequency of the column current signal through the current signal interference frequency of the slot-controlled unit to obtain the first frequency.

3. The method for reducing current interference of slot control machine series according to claim 1, characterized in that: The internal equipment of the slot control unit includes: a signal distributor, a signal relay box and a slot control machine.

4. The method for reducing current interference of slot control machine series according to claim 1, characterized in that: The fault location is repaired according to the fault type to obtain an improved slot control unit, and the specific steps include: Replacing the ceramic capacitor inside the switching power supply with a monolithic capacitor; Replacing the terminal block with an oxidation-resistant terminal block; The faulty part is sealed.

5. The method for reducing current interference of slot control machine series according to claim 1, characterized in that: Also includes: Data collection is performed on the current signal interference frequency of the improved slot-controlled unit to obtain a second frequency, and the first frequency and the second frequency are compared to obtain a comparison result.

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