Electrolytic hydrogen production system capable of continuously adapting to power supply fluctuation, and electrolytic hydrogen production method

Abstract

Disclosed in the present invention are an electrolytic hydrogen production system capable of continuously adapting to power supply fluctuation, and an electrolytic hydrogen production method. An electrolytic cell of the electrolytic hydrogen production system comprises n electrolytic sections (6); each electrolytic section (6) comprises 2y electrolytic chambers (5), two cathode end plates (2) and an anode middle plate (1); the two cathode end plates (2) are located at two ends of the electrolytic section (6), and the anode middle plate (1) is located in the middle of the electrolytic section (6); each electrolytic section (6) is divided into a left part and a right part, and each part comprises y electrolytic chambers (5), wherein n is greater than 1, y is greater than 1, and the n electrolytic sections (6) are continuously arranged in series from 1 to n. The electrolytic cell of the electrolytic hydrogen production system of the present invention comprises n electrolytic sections (6), and the temperature of an electrolyte in each electrolytic section (6) of the electrolytic cell is constant during operation, so that the electrolytic hydrogen production system of the present invention can be continuously regulated and controlled in a fluctuating power supply state, has high adaptability, is more adaptable to variable and fluctuating power supply input conditions, and has better safety performance.

Description

A hydrogen production system and method capable of sustainably adapting to power supply fluctuations Technical Field

[0001] The present invention relates to the technical field of hydrogen production by electrolysis of water, and in particular to an electrolysis hydrogen production system and an electrolysis hydrogen production method that can sustainably adapt to power supply fluctuations. Background Art

[0002] Water electrolysis technology for producing green hydrogen is crucial for achieving the dual carbon goals and plays a crucial role in improving resource utilization of wind and photovoltaic power plants and regulating grid peak loads. However, renewable energy sources such as wind and photovoltaic power are characterized by intermittency, volatility, and randomness. Wind power, in particular, exhibits greater randomness and volatility, making it difficult to provide stable power for water electrolysis devices.

[0003] Therefore, there is an urgent need for a water electrolysis hydrogen production system and electrolysis hydrogen production method that can adapt to the unstable power generation of wind farms and photovoltaic farms, has a wide power adjustment range, and does not shorten the operating life of the device or reduce the purity of the hydrogen product due to large power fluctuations.

[0004] In order to solve the above problems, the present invention is proposed.

[0005] Summary of the Invention

[0006] In response to the deficiencies of the prior art, the present invention provides an electrolytic hydrogen production system and control method thereof that can sustainably adapt to power supply fluctuations. To adapt to the irregular fluctuation characteristics of new energy sources, the electrolytic cell of the electrolytic hydrogen production system of the present invention includes n electrolytic segments 6, each of which includes 2y electrolytic chambers 5, two cathode end plates 2, and one anode intermediate plate 1. The n electrolytic segments 6 are arranged in series from 1 to n, and the cathode end plates 2 at both ends of two adjacent electrolytic segments 6 are shared. The power of each electrolytic segment 6 can be individually regulated, and at the same time, multiple electrolytic segments 6 are connected for operation and centralized liquid intake. The electrolyte in the electrolytic cell of each electrolytic segment 6 maintains a constant temperature during operation, making the electrolytic hydrogen production system of the present invention continuously regulated under fluctuating power supply conditions, having strong adaptability, and being more adaptable to variable and fluctuating power supply input conditions, while also having greater safety performance.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] To solve the above technical problems, the present invention adopts a multi-stage design for the entire electrolytic cell, and the internal structure of each electrolytic cell is consistent. The electrolytic hydrogen production system of the present invention can not only adapt to the irregular fluctuation characteristics of new energy, but also take into account the problem that the current density during electrolysis should not be too high and the fluctuation should not be too large. The electrolytic cell of the electrolytic hydrogen production system of the present invention includes n electrolytic segments 6, each of which is divided into two parts, left and right, which include 2y electrolytic chambers 5. The voltage of a single electrolytic chamber 5 is designed to be 1.85V, and the required total voltage U = n×y×1.85V (n is the number of electrolytic cell segments, and 2y is the number of electrolytic chambers in each small segment). The power adjustment of the device is achieved by segmentally controlling the current of each segment.

[0009] A first aspect of the present invention provides an electrolytic hydrogen production system that can sustainably adapt to power supply fluctuations. The electrolytic cell of the electrolytic hydrogen production system includes n electrolysis segments 6, each of which includes 2y electrolysis chambers 5, two cathode end plates 2 and one anode middle plate 1. The two cathode end plates 2 are located at both ends of the electrolysis segment 6, and the anode middle plate 1 is located in the middle of the electrolysis segment 6. Each electrolysis segment 6 is divided into two left and right parts, each part including y electrolysis chambers 5; wherein n is greater than 1, y is greater than 1, and the n electrolysis segments 6 are arranged continuously in series from 1 to n.

[0010] Preferably, the cathode end plates 2 at both ends of two adjacent electrolysis sections 6 are shared.

[0011] Preferably, the electrolysis hydrogen production system further comprises an electrolysis alkali solution outlet 3 and an electrolysis alkali solution inlet 4;

[0012] The electrolytic alkali solution outlet 3 is located at the upper end of the electrolytic hydrogen production system;

[0013] The electrolytic alkali solution inlet 4 is located at the lower end of the electrolytic hydrogen production system.

[0014] To avoid mixing of dissolved hydrogen and oxygen, the electrolytic alkali solution outlet 3 and the electrolytic alkali solution inlet 4 are symmetrically arranged at both ends of the electrolytic cell, and the electrolyte carrying oxygen and the electrolyte carrying hydrogen participate in the gas-liquid separation and cooling cycle separately.

[0015] Preferably, there are four electrolytic alkali solution outlets 3 and four electrolytic alkali solution inlets 4, which are distributed at both ends of the electrolytic cell, two of which are oxygen ends and the other two are hydrogen ends;

[0016] The four electrolytic alkali solution outlets 3 are symmetrically arranged at both ends of the electrolytic cell;

[0017] The four electrolytic alkali solution inlets 4 are symmetrically arranged at both ends of the electrolytic cell.

[0018] Preferably, each electrolysis chamber 5 has an independent electrolysis chamber liquid inlet 7 and an independent electrolysis chamber liquid outlet 8. That is, the electrolyte of the electrolysis alkali solution inlet 4 is dispersed to multiple independent electrolysis chamber liquid inlets 7, and the electrolyte of multiple independent electrolysis chamber liquid outlets 8 is collected at the electrolysis alkali solution outlet 3.

[0019] Preferably, the electrolytic alkali solution outlet 3 is the outlet of the main flow channel in the tank, connecting the upper electrolytic tank sections and the electrolytic chamber 5 in the section, and the electrolytic alkali solution inlet 4 is the inlet of the main flow channel in the tank, connecting the lower electrolytic tank sections and the electrolytic chamber 5 in the section;

[0020] Preferably, the electrolytic alkali solution outlet 3 is connected to a gas-liquid separation device through an external pipeline, and the electrolyte containing gas in each electrolytic chamber 5 flows out from the electrolytic alkali solution outlet 3 at both ends and enters the gas-liquid separation device.

[0021] Preferably, the electrolyte after gas-liquid separation flows into a cooling circulation device, which is connected to the outer end pipe of the electrolytic alkali solution inlet 4. The cooled electrolyte flows into the connecting flow channel of the electrolytic cell from the electrolytic alkali solution inlets 4 at both ends and flows into each of the electrolytic chambers 5.

[0022] Although the electrolytic cell of the hydrogen production electrolysis system is divided into n electrolysis segments 6, this segmented arrangement maintains consistency in both the input power and the electrolysis temperature within the cell. This temperature characteristic accelerates the electrolysis system's response to control system adjustments during continuous power fluctuations, making it more adaptable to variable and fluctuating power input conditions.

[0023] Preferably, the electrolytic hydrogen production system further includes a power supply copper busbar 9, one end of which is connected to a power source, allowing current to flow from the power supply copper busbar 9 into the electrolytic cell. The other end of the power supply copper busbar 9 is connected to a rectifier cabinet to control the current flowing into the electrolytic hydrogen production system. When power fluctuations or failures occur in one of the 1-n electrolytic segments 6, since the internal structures of the 1-n electrolytic segments 6 are essentially the same, segmented control can be implemented to adapt to the electrolytic cells. The segmented input power is adjusted to change the input power of the corresponding power supply copper busbar 9 in the 1-n electrolytic segment 6, ensuring that the rated current of each segment is consistent, but the actual operating current can be adjusted within a range of 0 to 100% of the rated current.

[0024] In order to ensure the normal operation of the electrolytic hydrogen production system, the electrolytic hydrogen production system of the present invention also includes other common components in addition to the above components.

[0025] A second aspect of the present invention provides an electrolytic hydrogen production method of the electrolytic hydrogen production system according to the first aspect of the present invention, wherein when the load of the external power supply fluctuates within the range of 75% + m×25% / n to 100% of the rated current, the current of the m-1 electrolysis section 6 is maintained at 75% of the rated current, and the current of the m-th electrolysis section 6 is automatically adjusted within the range of 75% to 100% of the rated current according to the power supply load;

[0026] When the external power supply load continues to decrease within the range of 50% + m × 25% / n to 75% of the rated current, the current of the electrolysis section 6 described in the m-1 segment is maintained at 50% of the rated current, and the current of the electrolysis section 6 described in the m segment is automatically adjusted within the range of 50% to 75% of the rated current according to the power supply load;

[0027] When the external power supply load continues to drop within the range of 25% + m × 25% / n to 50% of the rated current, the power supply of the electrolysis section 6 in the m-1th section is turned off, and the current of the electrolysis section 6 in the mth section is automatically adjusted within the range of 25% to 50% of the rated current according to the power supply load;

[0028] When the load of the external power supply increases, the system automatically restores the current of the electrolysis section 6 in the reverse order of the shutdown, thereby achieving continuous automatic adjustment of the electrolysis hydrogen production system when the rated current fluctuates between 25% and 100%, thereby reducing the impact of the external power supply load fluctuation on the electrolysis hydrogen production system;

[0029] Here, m is an integer and m≤n.

[0030] The step size of the above power supply segment adjustment is 25% / n. This step size can be adjusted according to actual conditions. If necessary, the step size can also be set lower, such as 20% / n.

[0031] The system of the present invention adopts multi-stage electrolytic cells for electrolysis. The two outer ends of any section in the multi-stage electrolytic cell are cathode end plates, and the middle is an anode middle plate. When the current is passed into the electrolytic cell by the transmission copper busbar, electrolysis begins. The upper electrolyte carries the generated gas into the communication flow channel, and is discharged from the electrolytic cell into the separation system. The gas-containing electrolyte is separated by the separation device and enters the cooling device. After cooling, the cooled alkali solution flows back into the electrolytic cell through the lower communication flow channel, completing the gas-liquid separation process and the alkali solution cooling process. A section of the electrolytic cell can contain multiple electrolytic chambers, but they are all connected to the main flow channel of the communication flow channel to ensure the connection between the sections of the electrolytic cells. The power input to each section of the electrolytic cell is controlled separately by the rectifier cabinet before the input copper busbar.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The electrolytic cell of the electrolytic hydrogen production system of the present invention includes n electrolytic segments 6, each of which is divided into two parts, left and right, including 2y electrolytic chambers 5, two cathode end plates 2 and one anode middle plate 1. The n electrolytic segments 6 are arranged continuously from 1 to n. The power of each electrolytic segment 6 can be individually regulated. At the same time, multiple electrolytic segments 6 are connected for operation and centralized liquid intake. The electrolyte in the electrolytic cell of each electrolytic segment 6 has a constant temperature during operation, so that the electrolytic hydrogen production system of the present invention under fluctuating power supply conditions can be continuously regulated, has strong adaptability, is more adaptable to variable and fluctuating power supply input conditions, and has better safety performance.

[0034] 2. Each section of the electrolytic cell in the multi-section design operates relatively independently. When a fault occurs in the electrolytic chamber of a section, the operation of other sections is not affected by the fault because the power supply is connected to the copper busbars and is relatively independent. When the corresponding protection action is triggered, the electrolysis water hydrogen production system continues to operate normally, better meeting production needs and providing a buffering effect on fault response. Specifically, when power adjustment is required, the current of the power supply connected to the copper busbars to each section of the electrolytic cell can be controlled to partially adjust the power of the electrolytic cell, giving the electrolytic cell a wider adjustment range as a whole, and the operating load range can reach 20%-150% of the rated power.

[0035] 3. After segmented control, the electrolytic cells are connected in series, ensuring consistent overall current. The voltage drop for each electrolytic cell segment is the total input voltage U divided by the number of segments n. For each electrolytic cell segment, while maintaining the electrolysis current, the voltage drop between the positive and negative electrodes is reduced, effectively ensuring the safety of the device.

[0036] 4. Start the electrolytic cell at a certain power. The start-up time of the electrolytic cell is related to the initial temperature at the time of startup. A low initial temperature during electrolysis will increase the start-up time of the electrolytic cell. When centralized liquid inlet is enabled and the flow channels are connected for operation, the operating temperature of each section of the electrolyte is constant under the connection. When facing power fluctuations in standby mode, since the operating temperature in the cell is basically the same, the electrolytic cell can operate at a standard higher than the rated load in a short period of time, so that the electrolytic cell can face fluctuations in electric power input and reach an efficient working condition more quickly. The control method of this application enables the electrolytic cell in the low-power standby state to respond quickly, reduce heat dissipation during operating condition fluctuations, make full use of electrical energy, and improve the energy utilization efficiency of the system in application. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] FIG1 is a schematic structural diagram of the electrolytic hydrogen production system of the present invention:

[0038] The accompanying drawings are described as follows: anode middle plate 1, cathode end plate 2, electrolytic alkali solution outlet 3, electrolytic alkali solution inlet 4, electrolysis chamber 5 (2y), electrolysis segment 6 (n segments), independent liquid inlet 7 for electrolysis chamber, independent liquid outlet 8 for electrolysis chamber, and power supply access copper bus 9. DETAILED DESCRIPTION

[0039] The present invention is described in further detail below with reference to the embodiments.

[0040] Those skilled in the art will understand that the following examples are intended to illustrate the present invention only and should not be construed as limiting the scope of the present invention. Where specific techniques or conditions are not specified in the examples, the techniques or conditions described in the literature in the art or in the product specifications were used. Materials or equipment used without manufacturer identification are commercially available conventional products.

[0041] It will be understood by those skilled in the art that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the description of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we say that an element is "connected" to another element, it can be directly connected to the other element, or there may be intermediate elements. In addition, the "connection" used here may include wireless connection.

[0042] In the description of the present invention, unless otherwise specified, "plurality" means two or more. Terms such as "inner," "upper," and "lower" indicating positions or states are based on those shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and are therefore not to be construed as limiting the present invention.

[0043] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "provided with" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0044] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by those skilled in the art in the art to which the present invention pertains. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art and, unless defined as such herein, will not be interpreted in an idealized or overly formal sense.

[0045] As shown in Figure 1, the electrolytic cell of an electrolytic hydrogen production system that can sustainably adapt to power supply fluctuations in this embodiment includes n electrolysis segments 6, each of which includes 2y electrolysis chambers 5, two cathode end plates 2 and one anode middle plate 1, the two cathode end plates 2 are located at both ends of the electrolysis segment 6, and the anode middle plate 1 is located in the middle of the electrolysis segment 6, each of which is divided into left and right parts, each of which includes y electrolysis chambers 5, and the left and right parts are respectively located on both sides of the anode middle plate 1; wherein n is greater than 1, y is greater than 1, and the n electrolysis segments 6 are arranged in series from 1 to n.

[0046] The cathode end plates 2 at both ends of two adjacent electrolysis sections 6 are shared.

[0047] The electrolytic hydrogen production system further includes an electrolytic alkali solution outlet 3 and an electrolytic alkali solution inlet 4;

[0048] The electrolytic alkali solution outlet 3 is located at the upper end of the electrolytic hydrogen production system;

[0049] The electrolytic alkali solution inlet 4 is located at the lower end of the electrolytic hydrogen production system.

[0050] To avoid mixing of dissolved hydrogen and oxygen, the electrolytic alkali solution outlet 3 and the electrolytic alkali solution inlet 4 are symmetrically arranged at both ends of the electrolytic cell, and the electrolyte carrying oxygen and the electrolyte carrying hydrogen participate in the gas-liquid separation and cooling cycle separately.

[0051] There are four electrolytic alkali solution outlets 3 and four electrolytic alkali solution inlets 4, both of which are located at both ends of the electrolytic cell, two of which are oxygen ends and the other two are hydrogen ends;

[0052] The four electrolytic alkali solution outlets 3 are symmetrically arranged at both ends of the electrolytic cell;

[0053] The four electrolytic alkali solution inlets 4 are symmetrically arranged at both ends of the electrolytic cell.

[0054] Each electrolysis chamber 5 has an independent liquid inlet 7 and an independent liquid outlet 8 for the electrolysis chamber.

[0055] The electrolytic alkali solution outlet 3 is the outlet of the main flow channel in the tank, connecting the upper electrolytic tank sections and the electrolytic chambers 5 in the sections. The electrolytic alkali solution inlet 4 is the inlet of the main flow channel in the tank, connecting the lower electrolytic tank sections and the electrolytic chambers 5 in the sections.

[0056] The electrolytic alkali solution outlet 3 is externally connected to a gas-liquid separation device through a pipeline. The electrolyte containing gas in each electrolytic chamber 5 flows out from the electrolytic alkali solution outlet 3 at both ends and enters the gas-liquid separation device.

[0057] The electrolyte after gas-liquid separation flows into the cooling circulation device, which is connected to the outer end pipe of the electrolytic alkali solution inlet 4. The cooled electrolyte flows into the connecting flow channel of the electrolytic cell from the electrolytic alkali solution inlets 4 at both ends and flows into each of the electrolytic chambers 5.

[0058] Although the electrolytic cell of the hydrogen production electrolysis system is divided into n electrolysis segments 6, this segmented arrangement maintains consistency in both the input power and the electrolysis temperature within the cell. This temperature characteristic accelerates the electrolysis system's response to control system adjustments during continuous power fluctuations, making it more adaptable to variable and fluctuating power input conditions.

[0059] The electrolytic hydrogen production system also includes a power supply copper busbar 9, one end of which is connected to a power source, allowing current to flow from the busbar 9 into the electrolytic cells. The other end of the busbar 9 is connected to a rectifier cabinet to control the current flowing into the electrolytic hydrogen production system. If power fluctuations or failures occur in one of the 1-n electrolytic segments 6, the internal structures of the 1-n electrolytic segments 6 are essentially the same, allowing for segmented control to adapt to the electrolytic cells. Adjusting the input power of each segment changes the input power of the corresponding power supply copper busbar 9 in the 1-n electrolytic segment 6, ensuring that the rated current of each segment is consistent, while the actual operating current can be adjusted within a range of 0 to 100% of the rated current.

[0060] In order to ensure the normal operation of the electrolytic hydrogen production system, the electrolytic hydrogen production system of the present invention also includes other common components in addition to the above components.

[0061] In the electrolysis hydrogen production method of the electrolysis hydrogen production system, when the external power supply load fluctuates within the range of 75% + m × 25% / n to 100% of the rated current, the current of the m-1 electrolysis section 6 is maintained at 75% of the rated current, and the current of the m-th electrolysis section 6 is automatically adjusted within the range of 75% to 100% of the rated current according to the power supply load;

[0062] When the external power supply load continues to decrease within the range of 50% + m × 25% / n to 75% of the rated current, the current of the electrolysis section 6 described in the m-1 segment is maintained at 50% of the rated current, and the current of the electrolysis section 6 described in the m segment is automatically adjusted within the range of 50% to 75% of the rated current according to the power supply load;

[0063] When the external power supply load continues to drop within the range of 25% + m × 25% / n to 50% of the rated current, the power supply of the electrolysis section 6 in the m-1th section is turned off, and the current of the electrolysis section 6 in the mth section is automatically adjusted within the range of 25% to 50% of the rated current according to the power supply load;

[0064] When the load of the external power supply increases, the system automatically restores the current of the electrolysis section 6 in the reverse order of the shutdown, thereby achieving continuous automatic adjustment of the electrolysis hydrogen production system when the rated current fluctuates between 25% and 100%, thereby reducing the impact of the external power supply load fluctuation on the electrolysis hydrogen production system;

[0065] Here, m is an integer and m≤n.

[0066] The system of the present invention adopts a multi-stage electrolytic cell. The two outer ends of any section in the multi-stage electrolytic cell are cathode end plates, and the middle is an anode middle plate. When the current is passed into the electrolytic cell by the transmission copper busbar, electrolysis begins. The upper electrolyte carries the generated gas into the communication flow channel, and is discharged from the electrolytic cell into the separation system. The gas-containing electrolyte is separated by the separation device and enters the cooling device. After cooling, the cooled alkali solution flows back into the electrolytic cell through the lower communication flow channel, completing the gas-liquid separation process and the alkali solution cooling process. A section of the electrolytic cell can contain multiple electrolytic chambers, but they are all connected to the main flow channel of the communication flow channel to ensure the connection between the sections of the electrolytic cell. The power input to each section of the electrolytic cell is controlled separately by the rectifier cabinet before the input copper busbar.

[0067] Taking 380V electrolysis as an example, if a three-stage electrolysis is used, that is, n=3 in the electrolysis section 6, the electrolytic cell is provided with 168 electrolysis chambers 5, with an average of 56 (y=28) electrolysis chambers 5 per section. If the design is based on 1.85V / chamber, the total power supply voltage should be 156V, and the voltage of each section should be 52V.

Claims

1. An electrolysis hydrogen production system that can continuously adapt to power supply fluctuations, characterized in that: The electrolytic cell of the electrolytic hydrogen production system comprises n electrolytic sections (6), each of the electrolytic sections (6) comprises 2y electrolytic chambers (5), two cathode end plates (2) and an anode middle plate (1), the two cathode end plates (2) are located at the two ends of the electrolytic section (6), and the anode middle plate (1) is located in the middle of the electrolytic section (6), each of the electrolytic sections (6) is divided into left and right parts, each part comprises y electrolytic chambers (5); wherein n is greater than 1, y is greater than 1, and the n electrolytic sections (6) are arranged in series from 1 to n.

2. The electrolysis hydrogen production system capable of continuously adapting to power supply fluctuations according to claim 1 is characterized in that: The cathode end plates (2) at both ends of two adjacent electrolysis sections (6) are shared.

3. The electrolysis hydrogen production system capable of continuously adapting to power supply fluctuations according to claim 1 is characterized in that: The electrolytic hydrogen production system also includes an electrolytic alkali solution outlet (3) and an electrolytic alkali solution inlet (4); The electrolytic alkali solution outlet (3) is located at the upper end of the electrolytic hydrogen production system; The electrolytic alkali solution inlet (4) is located at the lower end of the electrolytic hydrogen production system.

4. The electrolysis hydrogen production system capable of continuously adapting to power supply fluctuations according to claim 3 is characterized in that: There are four electrolytic alkali solution outlets (3) and four electrolytic alkali solution inlets (4), which are evenly distributed at both ends of the electrolytic cell, two of which are oxygen ends and the other two are hydrogen ends; The four electrolytic alkali solution outlets (3) are symmetrically arranged at both ends of the electrolytic cell; The four electrolytic alkali solution inlets (4) are symmetrically arranged at both ends of the electrolytic cell.

5. The electrolysis hydrogen production system capable of continuously adapting to power supply fluctuations according to claim 3 is characterized in that: Each electrolysis chamber (5) has an independent liquid inlet (7) and an independent liquid outlet (8).

6. The electrolysis hydrogen production system capable of continuously adapting to power supply fluctuations according to claim 3 is characterized in that: The electrolytic alkali solution outlet (3) is the outlet of the main flow channel in the tank, connecting the electrolytic cells at the upper end and the electrolytic chambers (5) in the sections. The electrolytic alkali solution inlet (4) is the inlet of the main flow channel in the tank, connecting the electrolytic cells at the lower end and the electrolytic chambers (5) in the sections.

7. The electrolysis hydrogen production system capable of continuously adapting to power supply fluctuations according to claim 3 is characterized in that: The electrolytic alkali solution outlet (3) is connected to a gas-liquid separation device through an external pipeline, and the electrolyte containing gas in each electrolytic chamber (5) flows out from the electrolytic alkali solution outlets (3) at both ends and enters the gas-liquid separation device.

8. The electrolysis hydrogen production system capable of continuously adapting to power supply fluctuations according to claim 7 is characterized in that: The electrolyte after gas-liquid separation flows into a cooling circulation device, which is connected to the outer end pipeline of the electrolytic alkali solution inlet (4). The cooled electrolyte flows into the connecting flow channel of the electrolytic cell from the electrolytic alkali solution inlets (4) at both ends, and flows into each of the electrolytic chambers (5).

9. The electrolysis hydrogen production system capable of continuously adapting to power supply fluctuations according to claim 1 is characterized in that: The electrolytic hydrogen production system further comprises a power supply access copper bar (9), one end of which is connected to a power supply, and current flows from the power supply access copper bar (9) into the electrolytic cell, and the other end of which is connected to a rectifier cabinet to control the current connected to the electrolytic hydrogen production system.

10. A method for producing hydrogen by electrolysis according to any one of claims 1 to 9, characterized in that: When the load of the external power supply fluctuates within the range of 75%+m×25% / n to 100% of the rated current, the current of the m-1 electrolysis section (6) is maintained at 75% of the rated current, and the current of the m-th electrolysis section (6) is automatically adjusted within the range of 75% to 100% of the rated current according to the load of the power supply; When the external power supply load continues to decrease within the range of 50%+m×25% / n to 75% of the rated current, the current of the electrolysis section (6) described in the m-1th section is maintained at 50% of the rated current, and the current of the electrolysis section (6) described in the mth section is automatically adjusted within the range of 50% to 75% of the rated current according to the power supply load; When the load of the external power supply continues to drop within the range of 25%+m×25% / n to 50% of the rated current, the power supply of the electrolysis section (6) described in the m-1th section is turned off, and the current of the electrolysis section (6) described in the mth section is automatically adjusted within the range of 25% to 50% of the rated current according to the load of the power supply; When the load of the external power supply increases, the system automatically reverses and restores the current of the electrolysis section (6) in the order of shutting down, thereby realizing continuous automatic adjustment of the electrolytic hydrogen production system when the rated current fluctuates by 25% to 100%, so as to reduce the influence of the load fluctuation of the external power supply on the electrolytic hydrogen production system; Wherein, m is an integer and m≤n.

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