Current control method, device, system, equipment and storage medium for electrolysis system

Abstract

The embodiment of the present invention discloses a current control method, device and system, equipment and storage medium of an electrolysis system, the method comprising: obtaining the electrolysis current input to the electrolysis system; determining the first inductance value corresponding to the electrolysis current according to the electrolysis current and a preset current-inductance conversion algorithm; determining the second inductance value using the first inductance value and the rated value of the rectifier inductor; adjusting the inductance value of the rectifier inductor of the electrolysis system using the second inductance value, determining the electrolysis current input to the electrolysis system, and returning to execute the step of obtaining the electrolysis current input to the electrolysis system. Through the above-mentioned method, the inductance value of the rectifier inductor is directly adjusted to avoid the increase of the auxiliary circuit when using a saturated reactor, the control method is simpler and more direct, and through closed-loop control, when the electrolysis current changes with the anode effect, the inductance value can be adjusted in time, so that the electrolysis current increases or decreases according to the corresponding amplitude with the change of the anode effect voltage, thereby improving the current stabilization effect.

Description

Technical Field

[0001] The present invention relates to the field of electrolysis technology, and in particular to a current control method, device and system, equipment and storage medium for an electrolysis system. Background Art

[0002] With the large-scale grid connection of new energy power generation, the high-energy-consuming electrolytic aluminum industry has developed to solve the problem of new energy consumption. The principle of electrolytic aluminum is that aluminum oxide in the electrolyte is reduced to metallic aluminum under the action of direct current, so a stable rectifier power supply system is crucial to the production of electrolytic aluminum.

[0003] At present, there are two main types of rectifier systems used in electrolytic aluminum, one is a thyristor-based rectifier system, and the other is a saturated reactor plus diode-based rectifier system. Since thyristors are relatively expensive, saturated reactor plus diode-based rectifier systems are more widely used, but the control of saturated reactors requires an external auxiliary circuit, and the control system is also relatively complex.

[0004] Therefore, the current control method of electrolysis current in the electrolysis process still needs to be improved. Summary of the invention

[0005] The main purpose of the present invention is to provide a current control method, device and system, equipment and storage medium for an electrolysis system, which can solve the problem of lack of a simple control method for electrolysis current in the prior art.

[0006] To achieve the above object, the present invention provides a current control method for an electrolysis system in a first aspect, the method comprising:

[0007] Obtaining an electrolysis current input into the electrolysis system;

[0008] Determining a first inductance value corresponding to the electrolysis current according to the electrolysis current and a preset current-inductance conversion algorithm;

[0009] Determining a second inductance value using the first inductance value and a rectifier inductance rating;

[0010] The inductance value of the rectifier inductor of the electrolysis system is adjusted using the second inductance value, the electrolysis current input to the electrolysis system is determined, and the step of obtaining the electrolysis current input to the electrolysis system is returned to be executed.

[0011] In a feasible implementation, the obtaining of the electrolysis current input into the electrolysis system includes:

[0012] Obtaining an original electrolysis current input into the electrolysis system;

[0013] The electrolysis current input to the electrolysis system is determined according to the original electrolysis current and a preset electrolysis current threshold.

[0014] In a feasible implementation, determining the first inductance value corresponding to the electrolysis current according to the electrolysis current and a preset current-inductance conversion algorithm includes:

[0015] Determining the effective value of the line voltage, angular frequency, commutation angle and commutation inductance of the AC side of the electrolysis system;

[0016] The first inductance value corresponding to the electrolysis current is determined by using the electrolysis current, the effective value of the AC side line voltage, the angular frequency, the commutation angle, the commutation inductance and the current-inductance conversion algorithm.

[0017] In a feasible implementation, determining the electrolysis current input to the electrolysis system according to the original electrolysis current and a preset electrolysis current threshold comprises:

[0018] When the original electrolysis current is greater than or equal to a preset first electrolysis current threshold, it is confirmed that the electrolysis current input to the electrolysis system is the first electrolysis current threshold;

[0019] When the original electrolysis current is greater than or equal to a preset second electrolysis current threshold, and the original electrolysis current is less than or equal to the first electrolysis current threshold, it is confirmed that the electrolysis current input into the electrolysis system is the original electrolysis current, and the second electrolysis current threshold is less than the first electrolysis current threshold;

[0020] When the original electrolysis current is less than or equal to the second electrolysis current threshold, it is confirmed that the electrolysis current input into the electrolysis system is the second electrolysis current threshold.

[0021] In a feasible implementation, determining the second inductance value by using the first inductance value and the rectifier inductance rating includes:

[0022] determining a difference between the first inductance value and the rectifier inductance rating;

[0023] The second inductance value is determined by using the preset magnification factor, the rectifier inductance rated value and the difference value, wherein the second inductance value is the sum of the difference value obtained by magnifying the magnification factor and the rectifier inductance rated value.

[0024] To achieve the above object, the second aspect of the present invention provides a current control device for an electrolysis system, the device comprising:

[0025] Data acquisition module: used to acquire the electrolysis current input into the electrolysis system;

[0026] A data conversion module: used to determine a first inductance value corresponding to the electrolysis current according to the electrolysis current and a preset current-inductance conversion algorithm;

[0027] A data determination module: used to determine a second inductance value by using the first inductance value and a rectifier inductance rating;

[0028] Data adjustment module: used to adjust the inductance of the rectifier inductor of the electrolysis system by using the second inductance value, determine the target rectifier inductance, and return to execute the step of obtaining the electrolysis current input into the electrolysis system.

[0029] To achieve the above-mentioned purpose, the third aspect of the present invention provides a current control system for an electrolysis system, wherein the current control system for the electrolysis system comprises at least a rectifier, wherein the rectifier comprises a rectifier inductor and a rectifier diode; the rectifier inductor is connected in series with the rectifier diode, and the rectifier is used to input an electrolysis current into the electrolysis system; the current control system for the electrolysis system is used to execute the steps of the method shown in the first aspect and any feasible implementation method to adjust the inductance value of the rectifier inductor to determine the electrolysis current input into the electrolysis system.

[0030] In a feasible implementation, the current control system of the electrolysis system also includes: an on-load voltage-changing transformer, a phase-shifting transformer and an electrolytic cell; the on-load voltage-changing transformer, the phase-shifting transformer, the electrolytic cell and the rectifier are electrically connected in sequence to form a series circuit.

[0031] To achieve the above-mentioned purpose, the fourth aspect of the present invention provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the processor executes the steps shown in the first aspect and any feasible implementation method.

[0032] To achieve the above-mentioned purpose, the fifth aspect of the present invention provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps shown in the first aspect and any feasible implementation method.

[0033] The embodiments of the present invention have the following beneficial effects:

[0034] The present invention provides a current control method for an electrolysis system, the method comprising: obtaining an electrolysis current input to the electrolysis system; determining a first inductance value corresponding to the electrolysis current according to the electrolysis current and a preset current-inductance conversion algorithm; determining a second inductance value using the first inductance value and a rectifier inductance rating; adjusting the inductance value of the rectifier inductor of the electrolysis system using the second inductance value, determining the electrolysis current input to the electrolysis system, and returning to execute the step of obtaining the electrolysis current input to the electrolysis system. Through the above method, the inductance value of the rectifier inductor is directly adjusted to avoid the increase of the auxiliary circuit when using a saturated reactor, and the control method is simpler and more direct, and the above method forms a closed loop, so that when the electrolysis current changes with the anode effect, the inductance value can be adjusted in time, so that the electrolysis current increases or decreases according to the corresponding amplitude with the change of the anode effect voltage, thereby improving the current stabilization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 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 or the description of the prior art 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 work.

[0036] in:

[0037] Figure 1 This is a schematic diagram of the structure of a current control system of an electrolysis system in an embodiment of the present invention;

[0038] Figure 2 This is a flow chart of a current control method for an electrolysis system in an embodiment of the present invention;

[0039] Figure 3 Another structural schematic diagram of a current control system of an electrolysis system according to an embodiment of the present invention;

[0040] Figure 4 Another flow chart of a current control method for an electrolysis system according to an embodiment of the present invention;

[0041] Figure 5 A logic control diagram of a current control method for an electrolysis system in an embodiment of the present invention;

[0042] Figure 6 This is a structural block diagram of a current control device for an electrolysis system in an embodiment of the present invention;

[0043] Figure 7 4 is a structural block diagram of a computer device in an embodiment of the present invention. DETAILED DESCRIPTION

[0044] 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.

[0045] It should be noted that the current control method for the electrolysis system shown in the present application can be applicable to the current control of the electrolysis system, and the electrolysis system includes but is not limited to electrolysis systems such as electrolytic aluminum. The present application takes the electrolysis system as an electrolytic aluminum system as an example to illustrate the current control method for the electrolysis system shown in the present application.

[0046] See also Figure 1 , Figure 1 FIG. 1 is a schematic diagram of a current control system of an electrolysis system according to an embodiment of the present invention. Figure 1 The current control system 10 of the electrolysis system shown includes at least an electrolysis system 101 and a rectifier 102, wherein the rectifier 102 includes a rectifier inductor 1022 and a rectifier diode 1021; the rectifier inductor 1022 is connected in series with the rectifier diode 1021, and the rectifier 102 is used to input an electrolysis current to the electrolysis system 101. The current control system 10 of the electrolysis system is used to perform the steps of the current control method of the electrolysis system shown in the present application to adjust the inductance value of the rectifier inductor to determine the electrolysis current input to the electrolysis system. The current control method of the electrolysis system will be described later.

[0047] It should be noted that the rectifier can rectify each phase of the power supply bus, so each phase is provided with a rectifier diode, and each phase has more than one rectifier diode. In the present application, a rectifier inductor is connected in series to each rectifier diode, so as to adjust the electrolysis current of the rectifier diode by adjusting the inductance value of the rectifier inductor to achieve closed-loop control. Among them, the rectifier includes but is not limited to a rectifier bridge composed of rectifier diodes.

[0048] For further information, see Figure 2 , Figure 2 FIG. 1 is a flow chart of a current control method for an electrolysis system according to an embodiment of the present invention. Figure 2 The methods shown include:

[0049] 201. Obtaining an electrolysis current input into the electrolysis system;

[0050] It should be noted that the execution subject of the current control method of the electrolysis system shown in the present application may be the current control system of the electrolysis system mentioned above, and the electrolysis system may be Figure 1The electrolysis system 101 shown. Exemplarily, the electrolysis system is an aluminum electrolysis system, and the electrolysis current is used to provide electrolysis power for the aluminum electrolysis system. Further, in order to realize the current control of the electrolysis system, it is necessary to obtain the electrolysis current input to the electrolysis system, that is, to collect the electrolysis current input to the electrolysis system in real time. The electrolysis current can be obtained by a device with signal collection capability such as a current sensor, which is not limited here. The electrolysis current is the current output by the rectifier.

[0051] 202. Determine a first inductance value corresponding to the electrolysis current according to the electrolysis current and a preset current-inductance conversion algorithm;

[0052] Further, since a rectifying inductor is connected in series in the rectifier in the present case, the inductance value corresponding to the electrolysis current can be calculated through the electrolysis current collected above. Specifically, the first inductance value corresponding to the electrolysis current is determined according to the electrolysis current and a preset current-inductance conversion algorithm, wherein the current-inductance conversion algorithm is used to reflect the relationship between the rectifying inductance of the rectifier diode and the direct current, wherein the electrolysis current can be regarded as the direct current, and the rectifying inductor can be the first inductance value, and then the first inductance value can be obtained through the current-inductance conversion algorithm.

[0053] 203. Determine a second inductance value by using the first inductance value and a rectifier inductance rating value;

[0054] Furthermore, the second inductance value can be determined by calculating the actual first inductance value and the rated value of the rectifier inductance, wherein the rated value of the rectifier inductance is used as a reference standard, and the standard can be used to determine whether the inductance value of the rectifier inductance needs to be adjusted, that is, to determine the second inductance value corresponding to the first inductance value, and the second inductance value is used to indicate the adjustment value of the rectifier current inductance.

[0055] 204. Use the second inductance value to adjust the inductance value of the rectifier inductor of the electrolysis system, determine the electrolysis current input to the electrolysis system, and return to execute the step of obtaining the electrolysis current input to the electrolysis system.

[0056] After obtaining the above-mentioned second inductance value, the inductance value of the rectifier inductor of the electrolysis system can be adjusted by using the second inductance value, thereby changing the electrolysis current of the rectifier, further, determining the electrolysis current input to the electrolysis system, and returning to execute the step of obtaining the electrolysis current input to the electrolysis system, so as to realize closed-loop control of the electrolysis current. The rectifier diode that is not easy to adjust in the rectifier is converted into a rectifier inductor that is easy to adjust, and the change of the electrolysis current is realized by adjusting the inductance value of the rectifier inductor in the rectifier, the control method is simple, and the influence of the anode effect of the electrolysis process on the electrolysis current is reduced.

[0057] The present invention provides a current control method for an electrolysis system, the method comprising: obtaining an electrolysis current input to the electrolysis system; determining a first inductance value corresponding to the electrolysis current according to the electrolysis current and a preset current-inductance conversion algorithm; determining a second inductance value using the first inductance value and a rectifier inductance rating; adjusting the inductance value of the rectifier inductor of the electrolysis system using the second inductance value, determining the electrolysis current input to the electrolysis system, and returning to execute the step of obtaining the electrolysis current input to the electrolysis system. Through the above method, the inductance value of the rectifier inductor is directly adjusted to avoid the increase of the auxiliary circuit when using a saturated reactor, and the control method is simpler and more direct, and the above method forms a closed loop, so that when the electrolysis current changes with the anode effect, the inductance value can be adjusted in time, so that the electrolysis current increases or decreases according to the corresponding amplitude with the change of the anode effect voltage, thereby improving the current stabilization effect.

[0058] See also Figure 3 , Figure 3 FIG. 2 is another schematic diagram of a current control system of an electrolysis system according to an embodiment of the present invention; Figure 3 The current control system of the electrolysis system shown includes at least an on-load tap-changing transformer 1, a phase-shifting transformer 2, an electrolytic cell 5 and a rectifier 4, wherein the rectifier 4 includes a rectifier inductor 3 and a rectifier diode; the on-load tap-changing transformer 1, the phase-shifting transformer 2, the electrolytic cell 5 and the rectifier 4 are electrically connected in sequence to form a series circuit, the rectifier inductor is connected in series with the rectifier diode, the rectifier is used to input the electrolysis current into the electrolysis system, and the current control system of the electrolysis system is used to execute the steps of any method as claimed in claims 1-5 to adjust the inductance value of the rectifier inductor to determine the electrolysis current input to the electrolysis system.

[0059] It should be noted that Figure 3 The rectifier 4, the rectifier inductor 3 and the rectifier diode are shown in FIG. Figure 1 The contents of the rectifier 102, the rectifier diode 1021 and the rectifier inductor 1022 are similar, and are not described here to avoid repetition. For details, please refer to the aforementioned Figure 1 The contents of the rectifier, rectifier diode and rectifier inductor are shown.

[0060] Furthermore, Figure 3 The electrolysis system shown can be regarded as an electrolytic cell 5, and the electrolytic cell model of the electrolytic cell 5 is composed of an equivalent resistance R0 and a back electromotive force E. Figure 3 The electrolysis current I input to the electrolysis system is shown in d ; Rectifier inductor VD1, rectifier inductor VD2, rectifier inductor VD3, rectifier inductor VD4, rectifier inductor VD5, rectifier inductor VD6; a phase voltage e a 、b phase voltage e b And the phase c voltage e c; 6 rectifier inductors L; commutation inductors L r , commutation inductance L r It consists of two parts, namely the inductance of the phase-shifting transformer and the inductance of the on-load tap-changing transformer, and the unit is H.

[0061] See also Figure 4 , Figure 4 FIG. 4 is another flow chart of a current control method for an electrolysis system according to an embodiment of the present invention. Figure 4 The methods shown include:

[0062] 401. Obtaining an electrolysis current input into the electrolysis system;

[0063] It should be noted that step 401 and Figure 2 The contents of step 201 are similar and will not be described here to avoid repetition. Figure 2 The content of step 201 is shown.

[0064] In a feasible implementation, in order to limit the large fluctuation of the electrolysis current and to enable the unit to start quickly, the electrolysis current I d Quickly reaches the rated value I d0 The actual electrolysis current measured from the electrolysis system must first pass through a limiting element so that the electrolysis current fluctuates within the limiting range, and then step 401 may include steps A1-A2:

[0065] A1. Obtaining the original electrolysis current input into the electrolysis system;

[0066] A2. Determine the electrolysis current input into the electrolysis system according to the original electrolysis current and the preset electrolysis current threshold.

[0067] It should be noted that the actual electrolysis current measured from the electrolysis system is also the original electrolysis current I d , needs to be processed by a limiting element to obtain the electrolysis current I after limiting din Specifically, according to the original electrolysis current and the preset electrolysis current threshold, the limiting process is performed to determine the electrolysis current input to the electrolysis system.

[0068] Exemplarily, the clipping process in A2 may include steps B1-B3:

[0069] B1. When the original electrolysis current is greater than or equal to a preset first electrolysis current threshold, the electrolysis current input into the electrolysis system is indeed the first electrolysis current threshold;

[0070] B2. When the original electrolysis current is greater than or equal to a preset second electrolysis current threshold, and the original electrolysis current is less than or equal to the first electrolysis current threshold, it is confirmed that the electrolysis current input into the electrolysis system is the original electrolysis current, and the second electrolysis current threshold is less than the first electrolysis current threshold;

[0071] B3. When the original electrolysis current is less than or equal to the second electrolysis current threshold, it is confirmed that the electrolysis current input into the electrolysis system is the second electrolysis current threshold.

[0072] If the upper and lower limits of the amplitude are set to ±10%, then the specific I din with I d The corresponding relationship is shown in the following formula (1):

[0073]

[0074] In the formula, I din I is the electrolysis current after limiting, and the inductance value of the rectifier inductor is subsequently calculated based on the electrolysis current after limiting; d is the original electrolysis current, I d0 Rated value for electrolysis current, 110% I d0 is the first electrolysis current threshold, 90%I d0 is the second electrolysis current threshold.

[0075] 402. Determine the effective value of the line voltage, angular frequency, commutation angle, and commutation inductance of the AC side of the electrolysis system;

[0076] 403. Determine a first inductance value corresponding to the electrolysis current by using the electrolysis current, the effective value of the AC side line voltage, the angular frequency, the commutation angle, the commutation inductance, and the current-inductance conversion algorithm;

[0077] Furthermore, the current-inductance conversion algorithm is not only related to the current inductance, but also to the effective value of the AC side line voltage, the angular frequency, the commutation angle and the commutation inductance of the electrolysis system. Therefore, it is necessary to determine the effective value of the AC side line voltage, the angular frequency, the commutation angle and the commutation inductance of the electrolysis system, and determine the first inductance value corresponding to the electrolysis current through the electrolysis current, the effective value of the AC side line voltage, the angular frequency, the commutation angle, the commutation inductance and the current-inductance conversion algorithm.

[0078] That is, the current that is not easy to control is converted into the inductance that is easier to control. The principle of conversion is the relationship between the rectifier diode rectifier inductance and the DC current. The current inductance conversion algorithm is shown in the following formula (2):

[0079]

[0080] Where:

[0081] L c ——The first inductance value, in H;

[0082] I din ——Input electrolysis current, unit: kA;

[0083] U LLR ——RMS value of AC line voltage, unit: kV;

[0084] ω——angular frequency, calculated by ω=2πf, where f is the frequency;

[0085] μ——commutation angle, in rad;

[0086] L r ——The phase-changing inductance consists of two parts: the inductance of the phase-shifting transformer and the inductance of the on-load tap-changing transformer, and the unit is H.

[0087] 404. Determine a second inductance value by using the first inductance value and a rectifier inductance rating value;

[0088] It should be noted that step 404 and Figure 2 The contents of step 203 are similar and will not be described here to avoid repetition. Figure 2 The content of step 203 is shown.

[0089] In a feasible implementation, step 404 may include steps C1-C2:

[0090] C1. determining a difference between the first inductance value and the rectifier inductance rating;

[0091] C2. Determine a second inductance value by using a preset magnification factor, a rectifier inductance rating, and a difference, wherein the second inductance value is the sum of the difference obtained by magnifying the magnification factor and the rectifier inductance rating.

[0092] Specifically, considering that the value of the rectifier inductor is relatively small, generally in the millihenry level, and the value of the electrolysis current cannot fluctuate greatly, the difference between the first inductance value and the rated value of the rectifier inductor is used to indicate whether the inductance value of the rectifier inductor should be adjusted. If the difference is 0, it means that no adjustment is required. If the difference is positive or negative, it means that adjustment is required. Then, the obtained difference is used to determine the second inductance value using a preset amplification factor, the rated value of the rectifier inductor and the difference. The second inductance value is the sum of the amplified difference and the rated value of the rectifier inductor. The inductance value of the rectifier inductor is adjusted by the second inductance value to reduce large fluctuations.

[0093] For example, the preset magnification factor may be 5 times, then the first inductance value L c , first calculate its value with the rectifier inductor rating L setThe difference ΔL is then amplified by 5 times and added to the rectifier inductor rating L. set The above is used as the new rectifier inductance L, that is, the second inductance value L.

[0094] 405. Use the second inductance value to adjust the inductance value of the rectifier inductor of the electrolysis system, determine the electrolysis current input to the electrolysis system, and return to execute the step of obtaining the electrolysis current input to the electrolysis system.

[0095] It should be noted that step 405 and Figure 2 The contents of step 204 are similar to those shown in FIG. 1 , and are not described here to avoid repetition. For details, please refer to Figure 2 The content of step 204 is shown.

[0096] Furthermore, the obtained second inductance value L is input back into the rectifier inductor, and the rectifier generates a new electrolysis current, which is measured as a new electrolysis current I d , I d After being processed by the current control method of the electrolysis system, L is formed again, thereby forming a closed loop to achieve the effect of real-time detection of steady current.

[0097] See also Figure 5 , Figure 5 FIG. 1 is a logic control diagram of a current control method for an electrolysis system in an embodiment of the present invention, such as Figure 5 The logic control diagram shown in the figure includes three links: (1) input link 501, which is to input the collected electrolysis current I d , input the limiting element, and obtain the electrolysis current I after limiting din , the limiting range can be ±10% of the rated value of the electrolysis current. The specific limiting formula can refer to formula (1) and will not be repeated here. (2) Conversion link 502. The purpose of this link is to convert the current that is inconvenient to control into an inductance that is easier to control. The principle of conversion is the relationship between the rectifier diode rectifier inductance and the DC current. For details, please refer to the above formula (2) and will not be repeated here. (3) Adjustment link 503. Considering that the value of the rectifier inductance is relatively small, generally in the millihenry level, and the value of the electrolysis current cannot fluctuate greatly, the calculated inductance value L obtained in the conversion link is c , first calculate its value with the rectifier inductor rating L set The difference ΔL is then amplified by 5 times and added to the inductor rating L set The above is used as the new rectifier inductor L. The rectifier inductor L obtained by the control system is then fed back to the electrolytic aluminum power supply system. As shown by the red solid line in the figure, the power supply system generates a new electrolytic current, which is measured as the input link I d , I dAfter passing through the control system, L is formed again, thereby forming a closed loop to achieve the effect of real-time detection of steady flow.

[0098] The current control method of the electrolysis system shown in the present application has the following beneficial effects: (1) The current control method of the electrolysis system directly controls the value of the rectifier inductor, avoiding the increase of the auxiliary circuit when using a saturated reactor, and the control method is simpler and more direct. (2) The control principle of the current control method of the electrolysis system is based on the diode rectifier circuit. The whole process fully considers avoiding large fluctuations in the electrolysis current, and can ensure that during the adjustment process, the electrolysis current increases or decreases according to the corresponding amplitude as the anode effect voltage changes. The electrolysis current changes relatively gently, and the current stabilization effect is very good.

[0099] See also Figure 6 , Figure 6 FIG. 1 is a structural block diagram of a current control device for an electrolysis system according to an embodiment of the present invention. Figure 6 The device shown comprises:

[0100] Data acquisition module 601: used to acquire the electrolysis current input into the electrolysis system;

[0101] Data conversion module 602: used to determine a first inductance value corresponding to the electrolysis current according to the electrolysis current and a preset current-inductance conversion algorithm;

[0102] The data determination module 603 is configured to determine a second inductance value by using the first inductance value and a rectifier inductance rating value;

[0103] Data adjustment module 604: used to adjust the inductance of the rectifier inductor of the electrolysis system by using the second inductance value, determine the target rectifier inductance, and return to execute the step of obtaining the electrolysis current input into the electrolysis system.

[0104] It should be noted that Figure 6 The functions of each module in the device shown are Figure 2 The contents of each step in the method shown are similar, and are not described here to avoid repetition. For details, please refer to the aforementioned Figure 2 The content of each step in the method shown.

[0105] The present invention provides a current control device for an electrolysis system, the device comprising: a data acquisition module: used for acquiring the electrolysis current input to the electrolysis system; a data conversion module: used for determining the first inductance value corresponding to the electrolysis current according to the electrolysis current and a preset current-inductance conversion algorithm; a data determination module: used for determining the second inductance value using the first inductance value and the rectifier inductance rating; a data adjustment module: used for adjusting the inductance of the rectifier inductor of the electrolysis system using the second inductance value, determining the target rectifier inductance, and returning to execute the step of acquiring the electrolysis current input to the electrolysis system. Through the above method, the inductance value of the rectifier inductor is directly adjusted, avoiding the increase of the auxiliary circuit when using a saturated reactor, and the control method is simpler and more direct, and the above method forms a closed loop, so that when the electrolysis current changes with the anode effect, the inductance value can be adjusted in time, so that the electrolysis current increases or decreases according to the corresponding amplitude with the change of the anode effect voltage, thereby improving the current stabilization effect.

[0106] In a feasible implementation, the data acquisition module in the current control device of the electrolysis system is specifically used to obtain the original electrolysis current input into the electrolysis system; and determine the electrolysis current input into the electrolysis system based on the original electrolysis current and a preset electrolysis current threshold.

[0107] In a feasible implementation, the data conversion module in the current control device of the above-mentioned electrolysis system is specifically used to determine the effective value of the AC side line voltage, angular frequency, commutation angle and commutation inductance of the electrolysis system; and use the electrolysis current, the effective value of the AC side line voltage, angular frequency, commutation angle, commutation inductance and the current-inductance conversion algorithm to determine the first inductance value corresponding to the electrolysis current.

[0108] In a feasible implementation, the data determination module in the current control device of the above-mentioned electrolysis system is specifically used to determine the difference between the first inductance value and the rectifier inductance rated value; and determine the second inductance value using a preset amplification factor, a rectifier inductance rated value and a difference, wherein the second inductance value is the sum of the difference amplified by the amplification factor and the rectifier inductance rated value.

[0109] Figure 7 FIG. 1 shows an internal structure diagram of a computer device in an embodiment. The computer device may be a terminal or a server. Figure 7As shown, the computer device includes a processor, a memory and a network interface connected via a system bus. The memory includes a non-volatile storage medium and an internal memory. The non-volatile storage medium of the computer device stores an operating system and may also store a computer program. When the computer program is executed by the processor, the processor can implement the above method. The internal memory may also store a computer program. When the computer program is executed by the processor, the processor can implement the above method. Those skilled in the art can understand that Figure 7 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0110] In one embodiment, a computer device is provided, comprising a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor performs the following steps: Figure 2 or Figure 4 The steps of the method are shown.

[0111] In one embodiment, a computer-readable storage medium is provided, which stores a computer program. When the computer program is executed by a processor, the processor performs the following steps: Figure 2 or Figure 4 The steps of the method are shown.

[0112] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the program can be stored in a non-volatile computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0113] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0114] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A current control method for an electrolysis system, characterized in that: The method comprises: Obtaining an electrolysis current input into the electrolysis system; Determining a first inductance value corresponding to the electrolysis current according to the electrolysis current and a preset current-inductance conversion algorithm; Determining a second inductance value using the first inductance value and a rectifier inductance rating; The inductance value of the rectifier inductor of the electrolysis system is adjusted by using the second inductance value to determine the electrolysis current input to the electrolysis system, and the step of obtaining the electrolysis current input to the electrolysis system is returned to be executed; Wherein, determining the first inductance value corresponding to the electrolysis current according to the electrolysis current and a preset current-inductance conversion algorithm comprises: Determining the effective value of the line voltage, angular frequency, commutation angle and commutation inductance of the AC side of the electrolysis system; Determine a first inductance value corresponding to the electrolysis current by using the electrolysis current, the effective value of the AC side line voltage, the angular frequency, the commutation angle, the commutation inductance, and the current-inductance conversion algorithm; Among them, the current inductance conversion algorithm is shown as follows: Where: L c ——First inductance value; I din ——input electrolysis current; U LLR ——RMS value of line voltage on the AC side; ω——angular frequency; μ——commutation angle; L r ——The phase-changing inductance consists of two parts, namely the inductance of the phase-shifting transformer and the inductance of the on-load tap-changing transformer.

2. The method according to claim 1, characterized in that: The step of obtaining the electrolysis current input into the electrolysis system comprises: Obtaining an original electrolysis current input into the electrolysis system; The electrolysis current input to the electrolysis system is determined according to the original electrolysis current and a preset electrolysis current threshold.

3. The method according to claim 2, characterized in that: Determining the electrolysis current input to the electrolysis system according to the original electrolysis current and a preset electrolysis current threshold comprises: When the original electrolysis current is greater than or equal to a preset first electrolysis current threshold, it is confirmed that the electrolysis current input to the electrolysis system is the first electrolysis current threshold; When the original electrolysis current is greater than or equal to a preset second electrolysis current threshold, and the original electrolysis current is less than or equal to the first electrolysis current threshold, it is confirmed that the electrolysis current input into the electrolysis system is the original electrolysis current, and the second electrolysis current threshold is less than the first electrolysis current threshold; When the original electrolysis current is less than or equal to the second electrolysis current threshold, it is confirmed that the electrolysis current input into the electrolysis system is the second electrolysis current threshold.

4. The method according to claim 1, characterized in that: Determining a second inductance value by using the first inductance value and a rectifier inductance rating includes: determining a difference between the first inductance value and the rectifier inductance rating; The second inductance value is determined by using the preset magnification factor, the rectifier inductance rated value and the difference value, wherein the second inductance value is the sum of the difference value obtained by magnifying the magnification factor and the rectifier inductance rated value.

5. A current control device for an electrolysis system, characterized in that: The device comprises: Data acquisition module: used to acquire the electrolysis current input into the electrolysis system; A data conversion module: used to determine a first inductance value corresponding to the electrolysis current according to the electrolysis current and a preset current-inductance conversion algorithm; A data determination module: used to determine a second inductance value by using the first inductance value and a rectifier inductance rating; A data adjustment module: used to adjust the inductance of the rectifier inductor of the electrolysis system by using the second inductance value, determine the target rectifier inductance, and return to execute the step of obtaining the electrolysis current input into the electrolysis system; The data conversion module is used to: determine the effective value of the AC side line voltage, the angular frequency, the commutation angle and the commutation inductance of the electrolysis system; determine the first inductance value corresponding to the electrolysis current by using the electrolysis current, the effective value of the AC side line voltage, the angular frequency, the commutation angle, the commutation inductance and the current-inductance conversion algorithm; Among them, the current inductance conversion algorithm is shown as follows: Where: L c ——First inductance value; I din ——input electrolysis current; U LLR ——RMS value of line voltage on the AC side; ω——angular frequency; μ——commutation angle; L r ——The phase-changing inductance consists of two parts, namely the inductance of the phase-shifting transformer and the inductance of the on-load tap-changing transformer.

6. A current control system for an electrolysis system, characterized in that: The current control system of the electrolysis system at least includes a rectifier, which includes a rectifier inductor and a rectifier diode; the rectifier inductor is connected in series with the rectifier diode, and the rectifier is used to input electrolysis current into the electrolysis system. The current control system of the electrolysis system is used to execute the steps of the method as described in any one of claims 1 to 4 to adjust the inductance value of the rectifier inductor to determine the electrolysis current input into the electrolysis system.

7. The current control system of the electrolysis system according to claim 6, characterized in that: The current control system of the electrolysis system also includes: an on-load voltage-regulating transformer, a phase-shifting transformer and an electrolytic cell; the on-load voltage-regulating transformer, the phase-shifting transformer, the electrolytic cell and the rectifier are electrically connected in sequence to form a series circuit.

8. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the processor is caused to perform the steps of the method according to any one of claims 1 to 4.

9. A computer device comprising a memory and a processor, characterized in that: The memory stores a computer program, and when the computer program is executed by the processor, the processor is caused to perform the steps of the method according to any one of claims 1 to 4.

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