Hydrogen production device, control method thereof, and distribution method of parallel valve groups

Abstract

The application provides a hydrogen production device, a control method thereof and a distribution method of a parallel valve group. When the flow rate flowing into the parallel valve group is in the transition interval, the opening degrees of the two regulating valves are adjusted, and in the two regulating valves, the opening degree of the regulating valve opened first is greater than the preset opening degree of the regulating valve, and the opening degree of the regulating valve opened later is less than the preset opening degree of the regulating valve. Therefore, the overall adjustment accuracy of the parallel valve group is higher than the adjustment accuracy of the regulating valve opened later, so that the overall accuracy of the parallel valve group is improved. When the flow rate flowing into the parallel valve group is in any of the adjustment intervals, the opening degree of the regulating valve is adjusted, and if the regulating valve is not the first regulating valve, the opening degree of the regulating valve is greater than or equal to the preset opening degree of the regulating valve. Therefore, the overall adjustment accuracy of the parallel valve group is relatively high. In summary, the control method improves the overall adjustment accuracy of the parallel valve group.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic control, in particular to a hydrogen production device, a control method thereof and a distribution method of a parallel valve group. BACKGROUND

[0002] Currently, in the renewable energy variable power hydrogen production scene, the working load of the hydrogen production device fluctuates with the fluctuation of renewable energy, and the load range is usually 5% to 110%; when the load fluctuates, the gas production will fluctuate in a large range, so it is difficult to maintain the stability of the liquid level or pressure in the gas-liquid separator in the hydrogen production device by only setting a single regulating valve at the outlet of the gas-liquid separator in the hydrogen production device, and therefore, in general, a parallel valve group, i.e. large and small regulating valves connected in parallel, is set at the outlet of the gas-liquid separator in the hydrogen production device.

[0003] When the working load of the hydrogen production device is large, i.e. the gas production of the electrolytic cell of the hydrogen production device is large, the small regulating valve is fully opened, and the opening of the large regulating valve is adjusted, i.e. the flow capacity of the large regulating valve is adjusted, to maintain the stability of the liquid level or pressure in the gas-liquid separator; however, when the opening of the large regulating valve is small, the adjustment error of the large regulating valve is large, which may cause the flow capacities of the large and small regulating valves to be unable to match the gas production of the hydrogen production device, and further may cause the liquid level or pressure in the gas-liquid separator to fluctuate greatly, i.e. unable to maintain the stable operation of the hydrogen production device.

[0004] Therefore, how to improve the overall adjustment accuracy of the parallel valve group is a technical problem to be solved. SUMMARY

[0005] Therefore, the present application provides a hydrogen production device, a control method thereof and a distribution method of a parallel valve group to improve the overall adjustment accuracy of the parallel valve group.

[0006] To achieve the above-mentioned purpose, the embodiments of the present application provide the following technical solutions:

[0007] The first aspect of the present application provides a distribution method of a parallel valve group, the parallel valve group comprising at least two regulating valves connected in parallel, and each of the regulating valves is opened in sequence; the distribution method of the parallel valve group comprises:

[0008] When the flow capacity flowing into the parallel valve group is in the adjustment interval of any of the regulating valves, the opening of each of the regulating valves opened before the regulating valve reaches the maximum opening of itself, and the opening of the regulating valve is adjusted according to the flow capacity flowing into the parallel valve group; if the regulating valve is not the first regulating valve, the opening of the regulating valve is greater than or equal to the preset opening of itself at this time;

[0009] When the flow rate flowing into the parallel valve group is in a transition interval between the regulation intervals of any two adjacent regulation valves in the opening sequence, the opening degree of each regulation valve that opens earlier than the two regulation valves reaches its maximum opening degree, and the opening degrees of the two regulation valves are adjusted according to the flow rate flowing into the parallel valve group; at this time, the opening degree of the regulation valve that opens earlier is greater than its preset opening degree, and the opening degree of the regulation valve that opens later is less than its preset opening degree.

[0010] Optionally, the opening degree of the regulation valve is in linear relationship with the flow rate flowing into the parallel valve group.

[0011] Optionally, when the flow rate flowing into the parallel valve group is in a transition interval between the regulation intervals of any two adjacent regulation valves in the opening sequence, in the two regulation valves, the regulation valve that opens earlier is greater than the regulation valve that opens later in terms of the tendency of the opening degree of the regulation valve to change with the change of the flow rate flowing into the parallel valve group.

[0012] Optionally, in all the regulation valves, the maximum flow rate of each regulation valve is different, or the maximum flow rate of part of the regulation valves is the same.

[0013] Optionally, if in all the regulation valves, the maximum flow rate of each regulation valve is different, the opening sequence of each regulation valve is in the order of the maximum flow rate of each regulation valve from small to large.

[0014] The second aspect of the present application provides a control method of a hydrogen production device, a parallel valve group is arranged at the gas outlet of each gas-liquid separator in the hydrogen production device; the control method of the hydrogen production device comprises:

[0015] obtaining a target adjustment value of the flow rate of the gas outlet of the gas-liquid separator;

[0016] determining the target opening degree of each regulation valve in the parallel valve group according to the target adjustment value and the distribution method of the parallel valve group in any one of the first aspect of the present application;

[0017] adjusting the opening degree of each regulation valve according to the target opening degree of each regulation valve.

[0018] Optionally, the target adjustment value is obtained from the control loop of the flow rate of the gas outlet of each gas-liquid separator in the hydrogen production device.

[0019] The third aspect of the present application provides a hydrogen production device, comprising: an electrolytic cell, a control system, two gas-liquid separators and two parallel valve groups; wherein:

[0020] The power supply end of the electrolytic cell is connected with a power supply, and the two outlets of the electrolytic cell are respectively connected with an oxygen gas-liquid separator and a hydrogen gas-liquid separator.

[0021] All the regulating valves are controlled by the control system, and the control system is used to execute the control method of the hydrogen production device according to any one of the second aspect of the application.

[0022] Optionally, the power taking end of the power supply is connected with a new energy power generation system.

[0023] Optionally, the control system comprises a controller and a signal converter, wherein:

[0024] The signal output end of the controller is connected with the control end of each regulating valve through the signal converter.

[0025] The controller is used to execute the control method of the hydrogen production device according to any one of the second aspect of the application.

[0026] According to the above technical solution, the application provides a distribution method of a parallel valve group, the parallel valve group comprises at least two regulating valves connected in parallel, and each regulating valve is opened in turn. In the control method, when the flow rate flowing into the parallel valve group is in the transition interval between any two regulating valves adjacent in the opening sequence, the opening degree of the two regulating valves is adjusted according to the flow rate flowing into the parallel valve group, and at this time, the opening degree of the regulating valve opened first is greater than the preset opening degree of the regulating valve, and the opening degree of the regulating valve opened later is less than the preset opening degree of the regulating valve, so the overall adjustment accuracy of the parallel valve group at this time is higher than the adjustment accuracy of the regulating valve opened later, which to some extent makes up for the disadvantage of low adjustment accuracy of the regulating valve opened later when the opening degree of the regulating valve is low, that is, the overall accuracy of the parallel valve group at this time is improved to some extent. Since when the flow rate flowing into the parallel valve group is in the adjustment interval of any regulating valve, the opening degree of the regulating valve is adjusted according to the flow rate flowing into the parallel valve group, and if the regulating valve is not the first regulating valve, the opening degree of the regulating valve at this time is greater than or equal to the preset opening degree of the regulating valve, so the overall adjustment accuracy of the parallel valve group at this time is high. In summary, the control method improves the overall adjustment accuracy of the parallel valve group. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only embodiments of the application, and those skilled in the art can obtain other drawings according to the provided drawings without creative labor.

[0028] Figure 1A flowchart of a distribution method of a parallel valve group provided by an embodiment of the present application is shown in the figure.

[0029] Figure 2 A schematic diagram of the relationship between the current signals of two regulating valves and the flow rate flowing into the parallel valve group is shown in the figure.

[0030] Figure 3 A flowchart of a control method of a hydrogen production device provided by an embodiment of the present application is shown in the figure.

[0031] Figures 4-7 Structural schematic diagrams of four implementation manners provided by embodiments of the present application are shown in the figures. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0033] In the present application, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms “include”, “contain” or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement “including a…” does not exclude the presence of another identical element in the process, method, article or device including the element.

[0034] In order to improve the overall regulation accuracy of the parallel valve group, an embodiment of the present application provides a distribution method of a parallel valve group, in which the parallel valve group includes at least two regulating valves connected in parallel, and each regulating valve is opened in sequence.

[0035] Optionally, in all regulating valves in the parallel valve group, the maximum flow rate of each regulating valve can be different, or the maximum flow rate of part of the regulating valves can be the same. In actual application, this is not limited, and is not specifically limited here, and can be determined according to specific conditions, which is within the protection scope of the present application.

[0036] If the maximum flow capacity of each regulating valve is not the same in all regulating valves, the opening sequence of the regulating valves can be from small to large maximum flow capacity of the regulating valves, or from large to small maximum flow capacity of the regulating valves. In actual application, this is not limited, and the specific implementation is not limited here, and can be determined according to the specific situation, which is within the protection scope of the present application.

[0037] It should be noted that in actual application, since the regulating error of the regulating valve with larger maximum flow capacity is larger when the opening degree of the regulating valve is small, the regulating valve needs to be compensated more, and therefore the preferred embodiment of the opening sequence of the regulating valves is from small to large maximum flow capacity of the regulating valves.

[0038] Optionally, the regulating valve can be a pneumatic valve, and in actual application, this is not limited, and the specific implementation is not limited here, and can be determined according to the specific situation, which is within the protection scope of the present application.

[0039] The specific flow of the distribution method of the parallel valve group is as shown in Figure 1 The specific flow of the distribution method of the parallel valve group is as shown in

[0040] S110, when the flow into the parallel valve group is in the regulating interval of any regulating valve, the opening degree of each regulating valve opened before the regulating valve reaches the maximum opening degree, and the opening degree of the regulating valve is adjusted according to the flow into the parallel valve group.

[0041] If the regulating valve is not the first regulating valve, when the flow into the parallel valve group is in the regulating interval of any regulating valve, the opening degree of the regulating valve is greater than or equal to the preset opening degree of the regulating valve; wherein the first regulating valve refers to the first regulating valve opened in the parallel valve group.

[0042] Optionally, the opening degree of the regulating valve and the flow into the parallel valve group can be in a linear relationship or a nonlinear relationship, and the specific implementation is not limited here, and can be determined according to the specific situation, which is within the protection scope of the present application; in actual application, the opening degree of the regulating valve and the flow into the parallel valve group are usually in a linear relationship.

[0043] In a specific example, if the regulating valve is a pneumatic valve, the adjustment of the opening degree of the regulating valve is realized by controlling the pressure applied to the valve of the regulating valve, and the control of the pressure applied to the valve of the regulating valve is realized in the form of an electric signal.

[0044] Optionally, the electric signal can be a voltage signal or a current signal, and the specific implementation is not limited here, and can be determined according to the specific situation, which is within the protection scope of the present application.

[0045] For example, assuming that the electrical signal is a current signal, and assuming that the maximum current value of the current signal is 20 mA, the minimum current value of the current signal is 4 mA, the maximum pressure applied to the valve is 0.1 MPa, and the minimum pressure applied to the valve is 0.02 MPa, the relationship between the pressure applied to the valve and the current signal is specifically as follows:

[0046]

[0047] wherein P is the pressure applied to the valve, and I is the current signal.

[0048] The above example only shows one implementation of adjusting the opening of the regulating valve when the regulating valve is a pneumatic valve. In actual applications, this implementation is not limited to this, and the specific implementation is not limited herein, and can be determined according to the specific situation, and is within the protection scope of the present application.

[0049] Assuming that the parallel valve group includes two regulating valves, and according to the size of the maximum flow, the two are respectively referred to as a large regulating valve and a small regulating valve; in addition, it is assumed that the small regulating valve is opened first, and the large regulating valve is opened later, and the opening of the regulating valve is adjusted by the current signal; therefore, the relationship between the current signal of the two regulating valves and the flow into the parallel valve group is specifically as shown in Figure 2

[0050] According to the above description, it can be deduced that, in the adjustment interval of the small regulating valve, the large regulating valve has not been opened, only the small regulating valve is opened, and the opening of the small regulating valve changes with the change of the flow into the parallel valve group; assuming that the opening of the regulating valve and the flow into the parallel valve group are in a linear relationship, the relationship between the current signal of the small regulating valve, the current signal of the large regulating valve, and the flow into the parallel valve group in the adjustment interval of the small regulating valve is specifically as follows:

[0051] I1=k1×D+b1, 0≤D≤D1

[0052] I2=I2min, 0≤D≤D1

[0053] wherein I1 is the current signal of the small regulating valve, D is the flow into the parallel valve group; I2 is the current signal of the large regulating valve, I2min is the minimum value of the current signal of the large regulating valve; b1 is the minimum value I1min of the current signal of the small regulating valve, and k1 and b1 can be set according to the flow characteristics of the small regulating valve.

[0054] ​It can be deduced from the above description that, in the regulation interval of the large regulating valve, both the small regulating valve and the large regulating valve are open, and the opening degree of the small regulating valve reaches the maximum opening degree thereof, and the opening degree of the large regulating valve changes with the change of the flow rate flowing into the parallel valve group; assuming that the opening degree of the regulating valve is linearly related to the flow rate flowing into the parallel valve group, the relationship between the current signal of the small regulating valve, the current signal of the large regulating valve and the flow rate flowing into the parallel valve group in the regulation interval of the large regulating valve is specifically as follows:

[0055] I1 = I1max, D2≤D≤the maximum flow rate of the parallel valve group

[0056] I2 = k2 x D + b2, D2≤D≤the maximum flow rate of the parallel valve group

[0057] Wherein, I1 is the current signal of the small regulating valve, I1max is the maximum value of the current signal of the small regulating valve; I2 is the current signal of the large regulating valve, D is the flow rate flowing into the parallel valve group, b2 is the current value of the current signal corresponding to the critical opening degree when the regulation accuracy of the large regulating valve changes from low to high, and k2 and b2 can be set according to the flow characteristics of the large regulating valve.

[0058] In S120, when the flow rate flowing into the parallel valve group is in the transition interval between the regulation intervals of any two regulating valves in the opening sequence, the opening degree of each regulating valve opened earlier than the two regulating valves reaches the maximum opening degree thereof, and the opening degrees of the two regulating valves are adjusted according to the flow rate flowing into the parallel valve group.

[0059] When the flow rate flowing into the parallel valve group is in the transition interval between the regulation intervals of any two regulating valves in the opening sequence, in the two regulating valves, the opening degree of the regulating valve opened earlier is greater than the preset opening degree thereof, and the opening degree of the regulating valve opened later is less than the preset opening degree thereof.

[0060] Suppose that the parallel valve group includes two regulating valves, and according to the maximum flow rate, the two are respectively denoted as a large regulating valve and a small regulating valve; in addition, it is assumed that the small regulating valve is opened earlier, and the large regulating valve is opened later, and the opening degree of the regulating valve is adjusted through the current signal; therefore, the relationship between the current signals of the two regulating valves and the flow rate flowing into the parallel valve group is specifically as shown in the following table: Figure 2

[0061] It can be deduced from the above description that, in the transition interval between the regulation interval of the small regulating valve and the regulation interval of the large regulating valve, both the small regulating valve and the large regulating valve are open, and the opening degree of the small regulating valve and the opening degree of the large regulating valve both change with the change of the flow rate flowing into the parallel valve group; in the transition interval, the relationship between the current signal of the small regulating valve, the current signal of the large regulating valve and the flow rate flowing into the parallel valve group is specifically as follows: ​

[0062] I1=k3xD+b3, D1≤D≤D2

[0063] I2=k4xD+b4, D1≤D≤D2

[0064] Wherein, I1 is the current signal of the small regulating valve, D is the flow of the flow into the parallel valve group, b3 is the current value of the current signal corresponding to the maximum opening of the small regulating valve in its own regulating interval, k3 and b3 can be set according to the actual situation; I2 is the current signal of the large regulating valve, and b4 is the minimum value I2min of the current signal of the large regulating valve.

[0065] It should be noted that in actual application, the maximum value of the current signal of the two regulating valves can be the same or different, which is not specifically limited here and can be determined according to the specific situation, and is within the protection scope of the present application; in addition, the minimum value of the current signal of the two regulating valves can be the same or different, which is not specifically limited here and can be determined according to the specific situation, and is within the protection scope of the present application; in actual application, the maximum value and the minimum value of the current signal of the two regulating valves are preferably the same.

[0066] If the opening of the regulating valve and the flow into the parallel valve group are in a linear relationship, when the flow into the parallel valve group is in the transition interval between the regulating intervals of any two regulating valves in the opening sequence, in the two regulating valves, the regulating valve opened first is greater than the regulating valve opened later in terms of the trend that the opening of the regulating valve changes with the change of the flow into the parallel valve group; for example, in the above example, k3 is set to be greater than k4.

[0067] In the control method, when the flow into the parallel valve group is in the transition interval between the regulating intervals of any two regulating valves in the opening sequence, the opening of the two regulating valves is adjusted according to the flow into the parallel valve group, and in the two regulating valves, the opening of the regulating valve opened first is greater than the preset opening of itself at this time, and the opening of the regulating valve opened later is less than the preset opening of itself at this time, so the overall regulating accuracy of the parallel valve group at this time is higher than the regulating accuracy of the regulating valve opened later at this time, thereby making up for the disadvantage of low regulating accuracy of the regulating valve opened later at a small opening, i.e. improving the overall accuracy of the parallel valve group at this time; and since when the flow into the parallel valve group is in the regulating interval of any regulating valve, the opening of the regulating valve is adjusted according to the flow into the parallel valve group, and if the regulating valve is not the first regulating valve, the opening of the regulating valve at this time is greater than or equal to the preset opening of itself, so the overall regulating accuracy of the parallel valve group at this time is high; in summary, the control method improves the overall regulating accuracy of the parallel valve group.

[0068] Another embodiment of the present application provides a control method of a hydrogen production device, wherein a parallel valve group is arranged at the gas outlet of each gas-liquid separator in the hydrogen production device; the specific process of the control method of the hydrogen production device is shown in Figure 3 and specifically includes the following steps:

[0069] S210, obtaining a target adjustment value of the flow rate of the gas outlet of the gas-liquid separator.

[0070] In actual application, the target adjustment value is obtained from the control loop of the flow rate of the gas outlet of each gas-liquid separator in the hydrogen production device; as for the control loop of the flow rate of the gas outlet of each gas-liquid separator in the hydrogen production device, it is a relatively mature control method in the prior art, which will not be described in detail here.

[0071] S220, determining the target opening of each regulating valve in the parallel valve group according to the target adjustment value and the distribution method of the parallel valve group provided in the above embodiment.

[0072] S230, adjusting the opening of each regulating valve according to the target opening of each regulating valve.

[0073] In the present embodiment, as the target adjustment value is distributed to each regulating valve according to the distribution method of the parallel valve group provided in the above embodiment, the matching degree of the flow rate of the parallel valve group and the gas production rate of the hydrogen production device can be improved, so that the fluctuation of the flow rate caused by the low overall adjustment precision of the parallel valve group at the gas outlet of the gas-liquid separator can be inhibited, thereby the fluctuation of the liquid level or pressure in the gas-liquid separator can be inhibited, and further the stable operation of the hydrogen production device can be maintained.

[0074] Another embodiment of the present application provides a hydrogen production device, and the specific structure is shown in Figure 4 or Figure 5 which specifically includes an electrolytic cell 10, a control system 20, two gas-liquid separators, and two parallel valve groups 50.

[0075] The power supply end of the electrolytic cell 10 is connected to a power supply 60, and the two outlets of the electrolytic cell 10 are respectively connected to an oxygen gas-liquid separator 30 and a hydrogen gas-liquid separator 40.

[0076] A parallel valve group 50 is arranged at the gas outlet of each gas-liquid separator; each parallel valve group 50 includes at least two regulating valves connected in parallel; for example, as shown in Figure 4 or Figure 5 each parallel valve group 50 includes two regulating valves T connected in parallel.

[0077] All the regulating valves are controlled by the control system 20, and the control system 20 is used to execute the control method of the hydrogen production device provided in the above embodiment.

[0078] Optionally, the power supply terminal of the power source 60 can be connected to the new energy power generation system 70, for example... Figure 4 The photovoltaic power generation system in the image can also be connected to a traditional power generation system, such as... Figure 5 The thermal power generation system 80 in the application, including but not limited to the above, is not specifically limited here and can be determined according to the specific circumstances, and is within the scope of protection of this application.

[0079] This embodiment also provides a specific implementation of the control system 20, the specific structure of which is as follows: Figure 6 ( Figure 6 exist Figure 4 Based on the presentation) or Figure 7 ( Figure 7 exist Figure 5 As shown in the illustration (based on the above), it specifically includes: a controller 21 and a signal converter 22; wherein:

[0080] The signal output terminal of the controller 21 is connected to the control terminal of each regulating valve T through the signal converter 22; the controller 21 is used to execute the control method of the hydrogen production device provided in the above embodiment.

[0081] The above is only one implementation of the control system 20. In practical applications, there are other implementations, including but not limited to this one. No specific limitation is made here. The implementation can be determined according to the specific circumstances, and all of them are within the protection scope of this application.

[0082] The features described above in the disclosed embodiments can be substituted or combined with each other, enabling those skilled in the art to implement or use this application. The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention's technical solutions still fall within the protection scope of the present invention.

Claims

1. A method for distributing parallel valve groups, characterized in that, The parallel valve group includes at least two regulating valves connected in parallel, and each regulating valve is opened sequentially. Each regulating valve has a different maximum flow rate, and the opening sequence of the regulating valves is from smallest to largest maximum flow rate. The allocation method of the parallel valve group includes: When the flow rate into the parallel valve group is within the adjustment range of any of the regulating valves, the opening degree of each regulating valve that opens before the first regulating valve is controlled to reach its maximum opening degree, and the opening degree of the regulating valve is adjusted according to the flow rate into the parallel valve group; if the regulating valve is not the first regulating valve, then the opening degree of the regulating valve is greater than or equal to its preset opening degree. When the flow rate into the parallel valve group is in the transition range between the adjustment ranges of any two control valves that are adjacent in the opening sequence, the opening degree of each control valve that opens before these two control valves is controlled to reach its maximum opening degree, and the opening degree of the two control valves is adjusted according to the flow rate into the parallel valve group; at this time, among the two control valves, the opening degree of the control valve that opens first is greater than its own preset opening degree, and the opening degree of the control valve that opens later is less than its own preset opening degree.

2. The method for distributing parallel valve groups according to claim 1, characterized in that, The opening degree of the regulating valve is linearly related to the flow rate into the parallel valve group.

3. The method for distributing parallel valve groups according to claim 2, characterized in that, When the flow rate into the parallel valve group is in the transition range between the adjustment ranges of any two control valves that are adjacent in the opening sequence, in terms of the trend of the opening degree of the control valve changing with the change of the flow rate into the parallel valve group, the control valve that is opened first is larger than the control valve that is opened later.

4. A control method for a hydrogen production device, characterized in that, Each gas-liquid separator in the hydrogen production unit is equipped with a parallel valve group at its gas outlet; the control method for the hydrogen production unit includes: Obtain the target adjustment value for the flow rate at the gas outlet of the gas-liquid separator; Based on the target adjustment value and the allocation method of the parallel valve group as described in any one of claims 1 to 3, determine the target opening degree of each regulating valve in the parallel valve group; The opening degree of each regulating valve is adjusted according to the target opening degree of each regulating valve.

5. The control method for the hydrogen production device according to claim 4, characterized in that, The target adjustment value is obtained from the control loop of the gas outlet flow rate for each of the gas-liquid separators in the hydrogen production unit.

6. A hydrogen production apparatus, characterized in that, include: The system comprises an electrolytic cell, a control system, two gas-liquid separators, and two parallel valve assemblies; among which: The power supply terminal of the electrolytic cell is connected to the power supply, and the two outlets of the electrolytic cell are connected to the oxygen gas-liquid separator and the hydrogen gas-liquid separator, respectively. All regulating valves are controlled by the control system, which is used to execute the control method for the hydrogen production device as described in claim 4 or 5.

7. The hydrogen production apparatus according to claim 6, characterized in that, The power supply is connected to the new energy power generation system.

8. The hydrogen production apparatus according to claim 6 or 7, characterized in that, The control system includes: a controller and a signal converter; wherein: The signal output terminal of the controller is connected to the control terminal of each of the regulating valves through the signal converter; The controller is used to execute the control method for the hydrogen production device as described in claim 4 or 5.

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