New energy hydrogen production power supply, system and control method thereof

Abstract

This application provides a new energy hydrogen production power source, system, and control method thereof. The new energy hydrogen production power source includes: a rectifier stage, connected to the power bus, for converting alternating current (AC) to direct current (DC); an energy storage stage, connected in parallel with the rectifier stage, for absorbing, storing, and / or releasing electrical energy; and a chopper stage, connected to both the rectifier stage and the electrolyzer, for increasing or decreasing the DC voltage to provide DC power to the electrolyzer. The control method for the new energy hydrogen production system includes: controlling the new energy hydrogen production power source to operate in the following modes based on the power generation status of the power bus: low new energy generation mode, new energy hydrogen production mode, new energy fluctuation mode, and no new energy power mode. The new energy hydrogen production power source has an energy storage component, allowing it to operate in modes with low and rapidly fluctuating new energy output, absorbing or generating active power to maintain electrolyzer production, and utilizing the energy storage stage to smooth out new energy fluctuations and maximize the utilization of new energy power.

Description

Technical Field

[0001] This application relates to the field of hydrogen production technology by water electrolysis, and more specifically, to a new energy hydrogen production power source, system and control method thereof. Background Technology

[0002] Hydrogen, the first element in the periodic table, possesses both raw material and energy attributes. When hydrogen releases energy, its main byproduct is water, with no greenhouse gas emissions. Therefore, hydrogen energy is humanity's ultimate environmentally friendly energy carrier. However, current mainstream hydrogen production methods, such as fossil fuel-based hydrogen production and coal-fired power generation, inevitably produce greenhouse gases during the production process, failing to achieve the goal of carbon reduction. In contrast, the entire production process of hydrogen through direct water electrolysis using renewable energy power generation is carbon-free. Therefore, this is a crucial technological route to achieving dual-carbon goals.

[0003] However, renewable energy power generation mainly relies on wind and solar power, which are characterized by volatility and poor stability. Meanwhile, the electrolyzers used for hydrogen production via water electrolysis require a stable power supply. The volatility of renewable energy sources makes it impossible for electrolyzers to operate continuously and stably, leading to frequent start-ups and shutdowns. This means that hydrogen production cannot currently be carried out using a purely off-grid method. Therefore, renewable energy hydrogen production urgently needs a power source capable of mitigating power fluctuations and maintaining continuous production from the electrolyzers.

[0004] The information disclosed in the background section is only intended to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] To address at least one of the aforementioned problems, this application proposes a new energy hydrogen production power source, system, and control method thereof.

[0006] According to a first aspect of this application, at least one embodiment of this application provides a new energy hydrogen production power source, comprising: a rectifier stage for connecting to a power bus to convert alternating current into direct current; an energy storage stage connected in parallel with the rectifier stage for absorbing, storing, and / or releasing electrical energy; and a chopper stage connected to the rectifier stage and an electrolyzer respectively for increasing or decreasing the DC voltage to provide DC power to the electrolyzer.

[0007] For example, in some embodiments of this application, the rectifier stage includes semiconductor devices connected in series and / or in parallel.

[0008] For example, in some embodiments of this application, the energy storage level includes: a group of energy storage units or at least two groups of energy storage units connected in parallel, wherein the energy storage unit includes: a battery; and a semiconductor device connected in series with the battery.

[0009] For example, in some embodiments of this application, the semiconductor device includes a reversible conductor.

[0010] For example, in some embodiments of this application, the chopper stage includes: a set of chopper units or at least two sets of chopper units connected in parallel, wherein the chopper unit includes: a first semiconductor device, an inductor and a capacitor connected in series; and a diode or a second semiconductor device connected in parallel with the inductor and the capacitor.

[0011] According to a second aspect of this application, at least one embodiment of this application provides a new energy hydrogen production system, comprising: a main switch connected to a power bus; a transformer connected to the main switch; and a new energy hydrogen production power supply as described in any one of the first aspects, connected to the transformer.

[0012] For example, in some embodiments of this application, a filter is also included, connected between the transformer and the new energy hydrogen production power source, to reduce the amount of harmonic generation.

[0013] According to a third aspect of this application, at least one embodiment of this application provides a control method for a new energy hydrogen production system as described above, comprising: controlling the new energy hydrogen production power source to operate in the following operating modes based on the power generation status of the power bus: when the power generation of the power bus is lower than the first operating load of the electrolyzer and there is no power generation fluctuation, controlling the new energy hydrogen production power source to enter a new energy low-power mode; when the power generation of the power bus is higher than the first operating load and there is no power generation fluctuation, controlling the new energy hydrogen production power source to enter a new energy hydrogen production mode; when the power generation of the power bus fluctuates, controlling the new energy hydrogen production power source to enter a new energy fluctuation mode; and when the power bus has no power generation, controlling the new energy hydrogen production power source to enter a new energy powerlessness mode.

[0014] For example, in some embodiments of this application, controlling the new energy hydrogen production power source to enter the new energy low-generation mode includes: controlling the rectifier stage to operate in rectification mode and outputting a first voltage to charge the energy storage stage; controlling the chopper stage to stop operating; and controlling the energy storage stage to stop charging when the stored energy of the energy storage stage is higher than a preset first threshold.

[0015] For example, in some embodiments of this application, controlling the new energy hydrogen production power supply to enter the new energy hydrogen production mode includes: controlling the rectifier stage to operate in rectifier mode; controlling the chopper stage to operate in chopper mode, modulating the electrical energy output by the rectifier stage to the operating voltage of the electrolyzer; controlling the energy storage stage to stop operating, and generating electricity from the power bus to supply power to the electrolyzer.

[0016] For example, in some embodiments of this application, controlling the new energy hydrogen production power supply to enter the new energy fluctuation mode includes: controlling the rectifier stage to operate in rectification mode; controlling the chopper stage to operate in chopper mode, modulating the electrical energy output by the rectifier stage to the operating voltage of the electrolyzer; when the stored energy of the energy storage stage is higher than a preset second threshold, controlling the energy storage stage to discharge, and controlling the chopper stage to increase its output power to consume the stored energy of the energy storage stage; when the stored energy of the energy storage stage is lower than the second threshold, controlling the energy storage stage to charge, and controlling the chopper stage to reduce its output power to control the output voltage of the rectifier stage to supply power to the energy storage stage.

[0017] For example, in some embodiments of this application, controlling the new energy hydrogen production power source to enter the new energy power-off mode includes: controlling the rectifier stage to stop working; controlling the energy storage stage to work; controlling the chopper stage to work in chopper mode, and modulating the electrical energy output by the energy storage stage to the working voltage of the electrolyzer.

[0018] For example, in some embodiments of this application, the method further includes: controlling the electrolyzer to stop producing hydrogen and controlling the electrolyzer to be in a hot standby state when the stored energy of the energy storage level is lower than a preset third threshold; and controlling the electrolyzer to stop operating when the stored energy of the energy storage level is lower than a preset fourth threshold.

[0019] This application provides a hydrogen production power supply with an energy storage component. It employs fully controllable devices as the main power switching devices, enabling high-frequency on / off control and achieving millisecond-level rapid adjustment. Furthermore, the new energy hydrogen production power supply has an energy storage component, allowing it to operate in modes where new energy output is low or fluctuates rapidly. It absorbs or generates active power to maintain electrolyzer production, utilizing the energy storage stage to smooth out new energy fluctuations and maximize the utilization of new energy power.

[0020] This application provides a hydrogen production system for new energy sources and its control method. The power bus can operate in four states: active power output, active power input, reactive power output, and reactive power input. It features fast response speed, good harmonic characteristics, and four-quadrant operation capability. It also stabilizes the grid frequency and voltage and suppresses grid power oscillations. Even during rapid power fluctuations, it can smooth the DC-side output, allowing the electrolyzer to adjust slowly according to a set rate, maintaining the normal operation of the electrolyzer.

[0021] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0022] The above and other objects, features, and advantages of this application will become more apparent from the detailed description of exemplary embodiments with reference to the accompanying drawings. The drawings described below are merely some embodiments of this application and are not intended to limit the scope of this application.

[0023] Figure 1 A schematic diagram illustrating the structural principle of a new energy hydrogen production power supply device including an energy storage component, as shown in an exemplary embodiment;

[0024] Figure 2 An exemplary topology diagram of a new energy hydrogen production power source including an energy storage component is shown in Example 1;

[0025] Figure 3 Example 2: A schematic diagram of an exemplary new energy hydrogen production power supply topology including an energy storage component;

[0026] Figure 4 Example 3 illustrates an exemplary new energy hydrogen production power supply topology including an energy storage component;

[0027] Figure 5 Example 4 illustrates an exemplary new energy hydrogen production power supply topology including an energy storage component;

[0028] Figure 6 Example 5 illustrates an exemplary topology of a new energy hydrogen production power source including an energy storage component;

[0029] Figure 7 A schematic diagram of the topology of a new energy hydrogen production system is shown in an exemplary embodiment;

[0030] Figure 8 A flowchart illustrating a control method for a new energy hydrogen production system is shown in an exemplary embodiment. Detailed Implementation

[0031] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0032] The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of these specific details, or other methods, components, materials, devices, etc. In these cases, well-known structures, methods, devices, implementations, materials, or operations will not be shown or described in detail.

[0033] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content, operations, or steps, nor do they necessarily need to be performed in the described order. For example, some operations or steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0034] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0035] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of exemplary embodiments, and the modules or processes in the drawings are not necessarily essential for implementing this application, and therefore cannot be used to limit the scope of protection of this application.

[0036] Figure 1 A schematic diagram of the structure of a new energy hydrogen production power device including an energy storage component is shown as an exemplary embodiment.

[0037] like Figure 1 As shown, the new energy hydrogen production power supply with energy storage includes a rectifier stage 4, an energy storage stage 5, and a chopper stage 6. The rectifier stage 4 is connected to the power bus and performs AC / DC conversion, transforming AC power into DC power. The energy storage stage 5 is connected in parallel with the rectifier stage 4 and is used to absorb, store, and / or release electrical energy. The chopper stage 6 is connected to both the rectifier stage 4 and the electrolyzer 7, and is used to increase or decrease the DC voltage. By modulating the outputs of the rectifier stage and the energy storage stage, full-range DC regulation is achieved, providing DC power to the electrolyzer 7 to meet its hydrogen production needs.

[0038] Figure 2 This is an exemplary topology diagram of a new energy hydrogen production power source including an energy storage component, Example 1.

[0039] like Figure 2 As shown, rectifier stage 4 includes semiconductor devices connected in series and / or in parallel.

[0040] Semiconductor devices, including field-effect transistors (FETs), can be constructed using fully controllable devices such as IGBTs or IGCTs and their associated circuitry. Rapid turn-on or turn-off control of these fully controllable devices can alter the DC-side voltage or current. Figure 2As shown. Rectifier stage 4 can also use semi-controlled or uncontrolled devices to achieve rectification. When using semi-controlled or uncontrolled devices in the rectifier circuit, low-order harmonics are generated, reactive power is consumed, and four-quadrant operation is not possible. Semiconductor devices using semi-controlled devices, including thyristors, such as... Figure 4 As shown; semiconductor devices employ uncontrolled devices, including diodes, such as... Figure 5 As shown.

[0041] Energy storage stage 5 includes a set of energy storage units, each comprising a battery and semiconductor devices. Energy storage stage 5 is connected in parallel to the DC output side of rectifier stage 4. The semiconductor devices are connected in series with the batteries, and these semiconductor devices are reversible. The configuration of the semiconductor devices controls whether the energy storage stage is connected to a new energy hydrogen production power source.

[0042] When the renewable energy generation of the power bus drops or rises rapidly, the reversible conductive device of the energy storage stage can release or absorb energy without affecting the normal operation of the electrolyzer. When the renewable energy generation of the power bus suddenly disappears, the energy storage stage releases energy to support the electrolyzer to adjust at a predetermined speed. When the frequency of renewable energy generation of the power bus fluctuates, the energy storage stage absorbs and releases energy to provide damping and suppress frequency rise and oscillation.

[0043] Chopper stage 6 includes a set of chopper units. Each chopper unit includes a first semiconductor device, an inductor, and a capacitor connected in series.

[0044] Chopper stage 6 also includes diodes, connected in parallel with inductors and capacitors, forming a DC-DC buck chopper circuit with fully controllable devices such as IGBTs and diodes. Figure 2 As shown. Chopper stage 6 also includes a second semiconductor device, connected in parallel with the inductor and capacitor, all of which form a DC boost-buck chopper current through fully controlled devices, providing boost / buck functionality, such as... Figure 3 As shown.

[0045] According to some embodiments, the energy storage stage 5 may further include at least two sets of energy storage units connected in parallel, and the chopper stage may further include at least two sets of chopper units connected in parallel, such as... Figure 6 As shown, this is to increase the capacity of the hydrogen production power source and increase the current.

[0046] This application provides a hydrogen production power supply with an energy storage component. It employs fully controllable devices as the main power switching devices, enabling high-frequency on / off control and achieving millisecond-level rapid adjustment. Furthermore, the new energy hydrogen production power supply has an energy storage component, allowing it to operate in modes where new energy output is low or fluctuates rapidly. It absorbs or generates active power to maintain electrolyzer production, utilizing the energy storage stage to smooth out new energy fluctuations and maximize the utilization of new energy power.

[0047] This application also provides a new energy hydrogen production system. For example... Figure 1As shown, the new energy hydrogen production system includes a main switch 2, a transformer 3, and a hydrogen production power supply with energy storage as described above. The main switch 2 is connected to the power bus 1. The transformer 3 is connected to the main switch 2. The new energy hydrogen production power supply is connected to the transformer 3. The electrolyzer 7 is connected to the new energy hydrogen production power supply to receive the electrical energy output from the new energy hydrogen production power supply for operation.

[0048] According to some embodiments, the new energy hydrogen production system also includes a filter connected between the transformer 3 and the new energy hydrogen production power source to reduce the harmonic generation of the new energy hydrogen production system, such as... Figure 6 and Figure 7 As shown. The filter includes an inductor and a capacitor.

[0049] Figure 8 A flowchart illustrating a control method for a new energy hydrogen production system is shown in an exemplary embodiment.

[0050] This application also proposes a control method for a new energy hydrogen production system as described above, the control method including steps S601-S605.

[0051] In step S601, the new energy hydrogen production power source is controlled to operate in the following working modes according to the power generation status of the power bus.

[0052] In step S602, when the power generation of the power bus is lower than the first operating load of the electrolyzer and there is no power generation fluctuation, the new energy hydrogen production power source is controlled to enter the new energy low generation mode.

[0053] According to some embodiments, the first operating load can be the minimum operating load of the electrolyzer.

[0054] S6021 controls the closing of the main switch;

[0055] S6022, controlling the new energy hydrogen production power source to enter the new energy low-generation mode, including:

[0056] The rectifier stage is controlled to operate in rectification mode, converting AC power to DC power and outputting a first voltage to charge the energy storage stage. The chopper stage is controlled to stop operating.

[0057] If the stored energy of the energy storage level exceeds a preset first threshold, the energy storage level will stop charging.

[0058] In step S603, when the power generation of the power bus is higher than the first operating load and there is no power generation fluctuation, the new energy hydrogen production power source is controlled to enter the new energy hydrogen production mode.

[0059] S6031 controls the closing of the main switch;

[0060] S6032 controls the entry of the new energy hydrogen production power source into the new energy hydrogen production mode, including:

[0061] The system controls the rectifier stage to operate in rectification mode. It also controls the chopper stage to operate in chopper mode, modulating the electrical energy output from the rectifier stage to the operating voltage of the electrolyzer. Finally, it controls the energy storage stage to stop operating, allowing the power bus to generate electricity to supply power to the electrolyzer and maintain its operation.

[0062] In step S604, when the power generation of the power bus fluctuates, the new energy hydrogen production power source is controlled to enter the new energy fluctuation mode.

[0063] S6041 controls the closing of the main switch;

[0064] S6042 controls the new energy hydrogen production power source to enter the new energy fluctuation mode, including:

[0065] The rectifier stage is controlled to operate in rectification mode. The chopper stage is controlled to operate in chopper mode, modulating the electrical energy output from the rectifier stage to the operating voltage of the electrolytic cell.

[0066] If the stored energy of the energy storage stage exceeds a preset second threshold, the energy storage stage is controlled to discharge, and the chopper stage is controlled to increase its output power to consume the stored energy of the energy storage stage.

[0067] When the stored energy of the energy storage stage is lower than a preset second threshold, the energy storage stage is controlled to charge, and the chopper stage is controlled to reduce its output power in order to control the output voltage of the rectifier stage to supply power to the energy storage stage.

[0068] In step S605, when the power bus is not generating electricity, the new energy hydrogen production power source is controlled to enter the new energy power-off mode.

[0069] S6051 controls the closing of the main switch;

[0070] S6052 controls the entry of the renewable hydrogen production power source into a renewable energy power-off mode, including:

[0071] Controls the rectifier stage to stop working. Controls the energy storage stage to start working. Controls the chopper stage to operate in chopper mode, modulating the electrical energy output from the energy storage stage to the operating voltage of the electrolyzer.

[0072] S6053, when the stored power of the energy storage level is lower than the preset third threshold, controls the electrolyzer to stop producing hydrogen and controls the electrolyzer to be in hot standby state. The power output of the energy storage level is only used to maintain the internal temperature and pressure of the electrolyzer.

[0073] S6054: When the stored energy of the energy storage level is lower than the preset fourth threshold, the stored energy of the energy storage level is insufficient to maintain the electrolyzer in a hot standby state, and the electrolyzer is controlled to stop operation and enter a shutdown state.

[0074] According to some embodiments, the fourth threshold is lower than the third threshold.

[0075] This application provides a hydrogen production system for new energy sources and its control method. The power bus can operate in four states: active power output, active power input, reactive power output, and reactive power input. It features fast response speed, good harmonic characteristics, and four-quadrant operation capability. It also stabilizes the grid frequency and voltage and suppresses grid power oscillations. Even during rapid power fluctuations, it can smooth the DC-side output, allowing the electrolyzer to adjust slowly according to a set rate, maintaining the normal operation of the electrolyzer.

[0076] It should be clearly understood that this application describes how specific examples are formed and used, but this application is not limited to any details of these examples. Rather, based on the teachings of the disclosure of this application, these principles can be applied to many other embodiments.

[0077] Furthermore, it should be noted that the above figures are merely illustrative representations of the processes included in the method according to exemplary embodiments of this application, and are not intended to be limiting. It is readily understood that the processes shown in the above figures do not indicate or limit the temporal order of these processes. Additionally, it is readily understood that these processes may be executed synchronously or asynchronously, for example, in multiple modules.

[0078] Exemplary embodiments of this application have been specifically shown and described above. It should be understood that this application is not limited to the detailed structures, arrangements, or implementation methods described herein; rather, this application is intended to cover various modifications and equivalent arrangements contained within the spirit and scope of the appended claims.

Claims

1. A new energy hydrogen production power source, characterized in that, include: A rectifier stage, comprising semiconductor devices connected in series and / or in parallel for connection to a power bus to convert alternating current into direct current; An energy storage stage, comprising a set of energy storage units or at least two sets of energy storage units connected in parallel, wherein each energy storage unit comprises a battery and a semiconductor device, wherein the semiconductor device is connected in series with the battery and includes a reversible conductor, and the energy storage stage is connected in parallel with the rectifier stage for absorbing, storing and / or releasing electrical energy; The chopper stage is connected to the rectifier stage and the electrolytic cell respectively, and is used to increase or decrease the DC voltage to provide DC power to the electrolytic cell. The new energy hydrogen production power supply is configured with four operating modes, and in each mode, the rectifier stage, the energy storage stage, and the chopper stage work together: When the power generation of the power bus is lower than the first operating load of the electrolyzer and there is no power generation fluctuation, the new energy hydrogen production power supply enters the new energy low generation mode, the rectifier stage charges the energy storage stage, and the chopper stage stops working. When the power generation capacity of the power bus is higher than the first operating load and there is no power generation fluctuation, the new energy hydrogen production power supply enters the new energy hydrogen production mode, the rectifier stage and the chopper stage work together to supply power to the electrolyzer, and the energy storage stage stops working. When the power generation of the power bus fluctuates, the new energy hydrogen production power supply enters the new energy fluctuation mode, and the rectifier stage, the energy storage stage, and the chopper stage work together to suppress the fluctuation through the charging and discharging level of the energy storage stage. When the power bus is not generating electricity, the new energy hydrogen production power source enters the new energy power-off mode, the rectifier stage stops working, and the energy storage stage supplies power to the electrolyzer through the chopper stage.

2. The new energy hydrogen production power source as described in claim 1, characterized in that, The chopper stage includes: A set of chopper units or at least two sets of chopper units connected in parallel, wherein the chopper units include: A first semiconductor device, an inductor, and a capacitor connected in series; A diode or a second semiconductor device is connected in parallel with the inductor and the capacitor.

3. A new energy hydrogen production system, characterized in that, include: The main switch is connected to the power bus. The transformer is connected to the main switch; The new energy hydrogen production power source as described in claim 1 or 2 is connected to the transformer.

4. The new energy hydrogen production system as described in claim 3, characterized in that, Also includes: A filter is connected between the transformer and the new energy hydrogen production power source to reduce harmonic generation.

5. A control method for a new energy hydrogen production system as described in claim 3 or 4, characterized in that, include: Based on the power generation status of the power bus, the new energy hydrogen production power source is controlled to operate in the following working modes: When the power generation capacity of the power bus is lower than the first operating load of the electrolyzer and there is no power generation fluctuation, the new energy hydrogen production power source is controlled to enter the new energy low generation mode. When the power generation capacity of the power bus is higher than the first operating load and there is no power generation fluctuation, the new energy hydrogen production power source is controlled to enter the new energy hydrogen production mode. In the event of power generation fluctuations at the power bus, the new energy hydrogen production power source is controlled to enter the new energy fluctuation mode. When the power bus is not generating electricity, the new energy hydrogen production power source is controlled to enter the new energy power-off mode.

6. The control method as described in claim 5, characterized in that, The control of the new energy hydrogen production power source to enter the new energy low-generation mode includes: The rectifier stage is controlled to operate in rectification mode and outputs a first voltage to charge the energy storage stage; Control the chopper stage to stop working; If the stored energy of the energy storage level exceeds a preset first threshold, the energy storage level is controlled to stop charging.

7. The control method as described in claim 5, characterized in that, The control of the new energy hydrogen production power source to enter the new energy hydrogen production mode includes: The rectifier stage is controlled to operate in rectification mode; The chopper stage is controlled to operate in chopper mode, and the electrical energy output by the rectifier stage is modulated to the operating voltage of the electrolytic cell. The energy storage stage is controlled to stop working, and the power bus generates electricity to supply power to the electrolytic cell.

8. The control method as described in claim 5, characterized in that, The control of the new energy hydrogen production power source to enter the new energy fluctuation mode includes: The rectifier stage is controlled to operate in rectification mode; The chopper stage is controlled to operate in chopper mode, and the electrical energy output by the rectifier stage is modulated to the operating voltage of the electrolytic cell. If the stored energy of the energy storage stage is higher than a preset second threshold, the energy storage stage is controlled to discharge, and the chopper stage is controlled to increase its output power to consume the stored energy of the energy storage stage. When the stored energy of the energy storage stage is lower than the second threshold, the energy storage stage is controlled to charge, and the chopper stage is controlled to reduce its output power, so as to control the output voltage of the rectifier stage to supply power to the energy storage stage.

9. The control method as described in claim 5, characterized in that, The control of the new energy hydrogen production power source to enter the new energy power-out mode includes: Control the rectifier stage to stop working; Control the operation of the energy storage stage; The chopper stage is controlled to operate in chopper mode, and the electrical energy output by the energy storage stage is modulated to the operating voltage of the electrolytic cell.

10. The control method as described in claim 9, characterized in that, Also includes: If the stored energy of the energy storage level is lower than a preset third threshold, the electrolyzer is controlled to stop producing hydrogen and is put into a hot standby state. If the stored energy of the energy storage level is lower than a preset fourth threshold, the electrolytic cell is controlled to stop operating.

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