Control method, device and equipment of hydrogen production system by electrolysis of water

Abstract

This invention discloses a control method, apparatus, and equipment for a water electrolysis hydrogen production system. The water electrolysis hydrogen production system includes a power supply, an energy storage device, and an water electrolysis hydrogen production component. A first output terminal of the power supply is electrically connected to the input terminal of the energy storage device, a second output terminal of the power supply is electrically connected to the input terminal of the water electrolysis hydrogen production component, and the output terminal of the energy storage device is electrically connected to the input terminal of the water electrolysis hydrogen production component. The method includes: acquiring the output power of the power supply and the charge of the energy storage device; if the output power of the power supply is less than a preset first power threshold and the charge of the energy storage device is greater than a preset charge threshold, controlling the power supply and the energy storage device to simultaneously supply power to the water electrolysis hydrogen production component. This invention solves the technical problem of low hydrogen production efficiency in water electrolysis hydrogen production.

Description

Technical Field

[0001] This invention belongs to the field of hydrogen production technology, and particularly relates to a control method, apparatus and equipment for an electrolytic water hydrogen production system. Background Technology

[0002] When producing hydrogen through water electrolysis, the power supply may experience unstable output power. If the output power of the power supply is too low, it may not be able to drive the normal operation of the water electrolysis hydrogen production equipment. It is necessary to wait for the output power of the power supply to increase to a certain threshold before starting the water electrolysis hydrogen production, which will result in low hydrogen production efficiency. Summary of the Invention

[0003] This invention provides a control method, apparatus, and equipment for a water electrolysis hydrogen production system, which solves the technical problem of low hydrogen production efficiency in water electrolysis hydrogen production.

[0004] In a first aspect, embodiments of the present invention provide a control method for a water electrolysis hydrogen production system. The water electrolysis hydrogen production system includes a power supply, an energy storage device, and a water electrolysis hydrogen production component. A first output terminal of the power supply is electrically connected to the input terminal of the energy storage device, a second output terminal of the power supply is electrically connected to the input terminal of the water electrolysis hydrogen production component, and the output terminal of the energy storage device is electrically connected to the input terminal of the water electrolysis hydrogen production component. The method includes: acquiring the output power of the power supply and the charge of the energy storage device; if the output power of the power supply is less than a preset first power threshold and the charge of the energy storage device is greater than a preset charge threshold, controlling the power supply and the energy storage device to simultaneously supply power to the water electrolysis hydrogen production component.

[0005] In conjunction with the first aspect of the present invention, in some embodiments, the water electrolysis hydrogen production assembly includes a water treatment device, a water storage device, and a hydrogen production device. The second output terminal of the power supply includes a first output sub-terminal and a second output sub-terminal. The output terminal of the energy storage device includes a first output terminal and a second output terminal. The power supply terminal of the water treatment device is electrically connected to the first output sub-terminal of the power supply and the first output terminal of the energy storage device, respectively. The first output terminal of the water treatment device is connected to the input terminal of the water storage device. The second output terminal of the water treatment device is connected to the first input terminal of the hydrogen production device. The output terminal of the water storage device is connected to the second input terminal of the hydrogen production device. The power supply terminal of the hydrogen production device is electrically connected to the second output sub-terminal of the power supply and the second output terminal of the energy storage device, respectively.

[0006] In conjunction with the first aspect of the present invention, in some embodiments, controlling the power supply and the energy storage device to simultaneously supply power to the water electrolysis hydrogen production component includes: acquiring the cooperative output power of the power supply and the energy storage device; if the cooperative output power is greater than or equal to a first power threshold, controlling both the power supply and the energy storage device to be in a discharging state, and controlling both the water treatment device and the hydrogen production device to be in an on-state, so that the water treatment device and the hydrogen production device operate coupled; if the cooperative output power is less than the first power threshold, controlling both the power supply and the energy storage device to be in a discharging state, and acquiring the water storage capacity of the water storage device; based on the water storage capacity of the water storage device, controlling the operating states of the water treatment device, the hydrogen production device, and the water storage device, so that the water treatment device and the hydrogen production device operate decoupled.

[0007] In conjunction with the first aspect of the present invention, in some embodiments, the method further includes: if the output power of the power supply is less than the first power threshold, the output power of the power supply is greater than a preset second power threshold, and the charge of the energy storage device is less than or equal to the preset charge threshold, controlling the power supply to be in a discharging state and obtaining the water storage capacity of the water storage device; wherein the second power threshold is less than the first power threshold; and based on the water storage capacity of the water storage device, controlling the operating states of the water treatment device, the hydrogen production device, and the water storage device to decouple the water treatment device and the hydrogen production device from each other.

[0008] In conjunction with the first aspect of the present invention, in some embodiments, controlling the operating states of the water treatment device, the hydrogen production device, and the water storage device based on the water storage capacity of the water storage device includes: if the water storage capacity of the water storage device is greater than a preset water volume threshold, controlling the water treatment device to be in a shutdown state, the hydrogen production device to be in a startup state, and connecting the output terminal of the water storage device to the second input terminal of the hydrogen production device; if the water storage capacity of the water storage device is less than or equal to the preset water volume threshold, controlling the water treatment device to be in a startup state, the hydrogen production device to be in a shutdown state, and connecting the first output terminal of the water treatment device to the input terminal of the water storage device.

[0009] In conjunction with the first aspect of the present invention, in some embodiments, if the output power of the power supply is less than or equal to the second power threshold, and the charge of the energy storage device is less than or equal to the preset charge threshold, the water treatment device and the hydrogen production device are both controlled to be in a shutdown state, the power supply is controlled to be in a discharge state, and the energy storage device is controlled to store the output electrical energy of the power supply.

[0010] In conjunction with the first aspect of the present invention, in some embodiments, if the output power of the power supply is greater than or equal to the first power threshold, the power supply is controlled to supply power to the water treatment device and the hydrogen production device, and the energy storage device is controlled to store the output electrical energy of the power supply.

[0011] In conjunction with the first aspect of the present invention, in some embodiments, the power supply is a renewable energy power generation device, and the wastewater before treatment by the water treatment device is oilfield produced water.

[0012] Secondly, embodiments of the present invention provide a control device for a water electrolysis hydrogen production system. The water electrolysis hydrogen production system includes a power supply, an energy storage device, and a water electrolysis hydrogen production component. A first output terminal of the power supply is electrically connected to the input terminal of the energy storage device, a second output terminal of the power supply is electrically connected to the input terminal of the water electrolysis hydrogen production component, and the output terminal of the energy storage device is electrically connected to the input terminal of the water electrolysis hydrogen production component. The device includes: an information acquisition unit for acquiring the output power of the power supply and the charge of the energy storage device; and a power supply control unit for controlling the power supply and the energy storage device to simultaneously supply power to the water electrolysis hydrogen production component if the output power of the power supply is less than a preset first power threshold and the charge of the energy storage device is greater than a preset charge threshold.

[0013] Thirdly, embodiments of the present invention provide an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method described in any of the first aspects.

[0014] The one or more technical solutions provided in the embodiments of the present invention achieve at least the following technical effects or advantages:

[0015] This invention obtains the output power of the power supply and the charge of the energy storage device. If the output power of the power supply is less than a preset first power threshold, and the charge of the energy storage device is greater than a preset charge threshold, the power supply and the energy storage device are controlled to simultaneously supply power to the water electrolysis hydrogen production component. The output power of the power supply being less than the preset first power threshold indicates that the water electrolysis hydrogen production component cannot operate solely with the power supply. Therefore, an energy storage device is added. If the output power of the power supply is too low, the power supply and the energy storage device are controlled to simultaneously supply power to the water electrolysis hydrogen production component, ensuring its normal operation. This avoids the need to wait due to insufficient power supply output power, thus improving the hydrogen production efficiency of water electrolysis. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the water electrolysis hydrogen production system in an embodiment of the present invention;

[0018] Figure 2 This is a flowchart of the control method for the water electrolysis hydrogen production system in an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram showing the connections of various components in the water electrolysis hydrogen production system in an embodiment of the present invention;

[0020] Figure 4 This is a functional block diagram of the control device of the water electrolysis hydrogen production system in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of an electronic device in an embodiment of the present invention. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] In this invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0024] This invention provides a control method for a water electrolysis hydrogen production system, referencing... Figure 1 As shown, Figure 1This is a schematic diagram of a water electrolysis hydrogen production system according to an embodiment of the present invention. The water electrolysis hydrogen production system includes a power supply, an energy storage device, and a water electrolysis hydrogen production component. The first output terminal of the power supply is electrically connected to the input terminal of the energy storage device, the second output terminal of the power supply is electrically connected to the input terminal of the water electrolysis hydrogen production component, and the output terminal of the energy storage device is electrically connected to the input terminal of the water electrolysis hydrogen production component. (Reference) Figure 2 As shown, the method includes the following steps S101 to S102:

[0025] S101: Obtain the output power of the power supply and the charge of the energy storage device.

[0026] S102: If the output power of the power supply is less than the preset first power threshold and the charge of the energy storage device is greater than the preset charge threshold, control the power supply and the energy storage device to simultaneously supply power to the water electrolysis hydrogen production component.

[0027] It should be noted that the first power threshold can be the minimum power required to ensure the operation of the water electrolysis hydrogen production unit. A charge level greater than the preset charge threshold indicates that the energy storage device can independently power the water electrolysis hydrogen production unit.

[0028] In some embodiments, the water electrolysis hydrogen production assembly may include a water treatment device, a water storage device, and a hydrogen production device. The second output terminal of the power supply includes a first output sub-terminal and a second output sub-terminal. The output terminal of the energy storage device includes a first output terminal and a second output terminal. The power supply terminal of the water treatment device is electrically connected to the first output sub-terminal of the power supply and the first output terminal of the energy storage device, respectively. The first output terminal of the water treatment device is connected to the input terminal of the water storage device. The second output terminal of the water treatment device is connected to the first input terminal of the hydrogen production device. The output terminal of the water storage device is connected to the second input terminal of the hydrogen production device. The power supply terminal of the hydrogen production device is electrically connected to the second output sub-terminal of the power supply and the second output terminal of the energy storage device, respectively.

[0029] In some embodiments, the water electrolysis hydrogen production system may further include a controller, which is electrically connected to the control terminals of the power supply, the energy storage device, the water treatment device, the water storage device, and the hydrogen production device, respectively. (Reference) Figure 3 As shown, Figure 3 This is a schematic diagram showing the connections of various components in the water electrolysis hydrogen production system in an embodiment of the present invention.

[0030] In some embodiments, the water treatment device may be an electrochemical water treatment device, and the hydrogen production device may be an electrolytic water hydrogen production device.

[0031] In some embodiments, controlling the power supply and energy storage device to simultaneously supply power to the water electrolysis hydrogen production unit may include the following steps S1021 to S1023:

[0032] S1021: Obtain the combined output power of the power supply and energy storage device.

[0033] In some implementations, obtaining the combined output power of the power supply and the energy storage device can be achieved by: obtaining the output power of the energy storage device and the output power of the power supply; and using the sum of the output power of the energy storage device and the output power of the power supply as the combined output power.

[0034] S1022: If the coordinated output power is greater than or equal to the first power threshold, control the power supply and energy storage device to be in a discharging state, and control the water treatment device and hydrogen production device to be in an on-state, so that the water treatment device and hydrogen production device can be coupled to operate.

[0035] It should be noted that the coupled operation of the water treatment unit and the hydrogen production unit means that the water treatment unit and the hydrogen production unit operate simultaneously, and the water for the hydrogen production unit comes from the water treatment unit, not the water storage unit. In the case of an electrolytic water hydrogen production assembly that includes a water treatment unit, a water storage unit, and a hydrogen production unit, the first power threshold can be the minimum power required to ensure the coupled operation of the water treatment unit and the hydrogen production unit.

[0036] S1023: If the cooperative output power is less than the first power threshold, control the power supply and energy storage device to be in a discharge state, and obtain the water storage capacity of the water storage device; based on the water storage capacity of the water storage device, control the working status of the water treatment device, the hydrogen production device and the water storage device so that the water treatment device and the hydrogen production device operate in decoupled order.

[0037] It should be noted that the decoupled operation of the water treatment unit and the hydrogen production unit means that the water treatment unit and the hydrogen production unit operate independently at different times. Specifically, when the hydrogen production unit is operating independently, the water treatment unit is shut down, and the water for the hydrogen production unit comes from the water storage unit, not the water treatment unit, and the water storage unit is in a water discharge state; when the water treatment unit is operating independently, the hydrogen production unit is shut down, and the water treated by the water treatment unit is discharged to the water storage unit, and the water storage unit is in a water storage state.

[0038] It should be noted that when the water electrolysis hydrogen production assembly includes a water treatment device, a water storage device, and a hydrogen production device, a charge of the energy storage device exceeding a preset power threshold indicates that the water treatment device and the hydrogen production device can be decoupled and operated at least by powering the energy storage device alone. It should also be noted that when the coordinated output power is greater than or equal to a first power threshold, controlling the coupled operation of the water treatment device and the hydrogen production device can improve hydrogen production efficiency. When the coordinated output power is less than the first power threshold, the coordinated output power cannot guarantee coupled operation. If the water treatment device and the hydrogen production device stop working simultaneously, hydrogen production cannot occur. Therefore, controlling the decoupled operation of the water treatment device and the hydrogen production device in this case avoids simultaneous shutdowns. By operating independently in time periods, hydrogen production is ensured in stages, preventing a complete halt to the hydrogen production process, thus improving hydrogen production efficiency to some extent.

[0039] In some embodiments, the control method for the water electrolysis hydrogen production system may further include the following step S103:

[0040] S103: If the output power of the power supply is less than the first power threshold, the output power of the power supply is greater than the preset second power threshold, and the charge of the energy storage device is less than or equal to the preset charge threshold, the power supply is controlled to be in a discharge state, and the water storage capacity of the water storage device is obtained; wherein, the second power threshold is less than the first power threshold; based on the water storage capacity of the water storage device, the working state of the water treatment device, the hydrogen production device and the water storage device is controlled so that the water treatment device and the hydrogen production device operate in decoupled order.

[0041] In the case of an electrolytic water hydrogen production assembly that includes a water treatment device, a water storage device, and a hydrogen production device, the second power threshold can be the minimum power required to ensure the decoupled operation of the water treatment device and the hydrogen production device.

[0042] In some embodiments, regarding step S103 or S1023, controlling the operating states of the water treatment device, hydrogen production device, and water storage device based on the water storage capacity of the water storage device may include: if the water storage capacity of the water storage device is greater than a preset water volume threshold, controlling the water treatment device to be in a shutdown state, the hydrogen production device to be in a startup state, and connecting the output terminal of the water storage device to the second input terminal of the hydrogen production device; if the water storage capacity of the water storage device is less than or equal to the preset water volume threshold, controlling the water treatment device to be in a startup state, the hydrogen production device to be in a shutdown state, and connecting the first output terminal of the water treatment device to the input terminal of the water storage device.

[0043] It should be noted that when the output of the water storage device is connected to the second input of the hydrogen production device, the water storage device is in a discharging state, and the water for the hydrogen production device originates from the water storage device. When the first output of the water treatment device is connected to the input of the water storage device, the water storage device is in a water storage state, and the water treated by the water treatment device flows into the water storage device. It should also be noted that during the decoupled operation of the water treatment device and the hydrogen production device, they can also be operated separately according to a preset time interval. However, a potential problem is that if the water storage capacity of the water storage device is too small, the hydrogen production device may be unable to produce hydrogen. Therefore, this embodiment of the invention limits the determination of whether to operate the water treatment device or the hydrogen production device based on the water storage capacity of the water storage device, rather than based on a preset time interval. This avoids the hydrogen production device being unable to produce hydrogen due to insufficient water storage capacity, thus improving hydrogen production efficiency.

[0044] In some embodiments, the control method for the water electrolysis hydrogen production system may further include the following step S104:

[0045] S104: If the output power of the power supply is less than or equal to the second power threshold, and the charge of the energy storage device is less than or equal to the preset charge threshold, the water treatment device and the hydrogen production device are both controlled to be in a shutdown state, the power supply is controlled to be in a discharge state, and the energy storage device is controlled to store the output electrical energy of the power supply.

[0046] It should be noted that if the energy storage device's charge capacity is less than or equal to a preset charge threshold, it indicates that the energy storage device's charge capacity is low, and continued use may lead to the energy storage device running out of power and being damaged. Therefore, this embodiment of the invention limits the control of the energy storage device to store the output power of the power supply, in order to increase the energy storage device's charge capacity and reduce the possibility of the energy storage device running out of power and being damaged.

[0047] In some embodiments, the control method for the water electrolysis hydrogen production system may further include the following step S105:

[0048] S105: If the output power of the power supply is greater than or equal to the first power threshold, control the power supply to supply power to the water treatment device and the hydrogen production device, and control the energy storage device to store the output electrical energy of the power supply.

[0049] In some implementations, the power source is a renewable energy power generation device, and the wastewater before treatment by the water treatment device is produced water from an oil field.

[0050] It should be noted that the water electrolysis hydrogen production assembly may only include a hydrogen production device. In this case, the hydrogen production device needs to have its own water source to produce hydrogen. However, continuous hydrogen production is difficult to achieve in some situations where clean water is scarce, such as oil fields in western China. Therefore, this embodiment of the invention limits the water electrolysis hydrogen production assembly to include a water treatment device, a water storage device, and a hydrogen production device. The wastewater before treatment by the water treatment device is produced water from the oil field. The water treatment device can treat the produced water from the oil field to obtain clean water, which can continuously provide clean water to the hydrogen production device, thus achieving the beneficial effect of continuous hydrogen production in the absence of clean water. In addition, the production water from the oil field is recycled to avoid resource waste, achieving the beneficial effects of energy conservation and environmental protection.

[0051] It should be noted that the embodiments of the present invention are particularly applicable to situations where the power supply is a renewable energy power generation device, because the output power of renewable energy power generation devices is unstable and often falls short of expectations, making the coordination of energy storage devices even more necessary. Renewable energy power generation devices include photovoltaic power generation devices and wind power generation devices. Due to changes in the natural environment, these power generation devices experience periods of low and high power generation.

[0052] It should be noted that existing technical solutions do not yet include research on the anti-fluctuation response of coupled electrochemical water treatment devices and alkaline electrolysis devices to renewable energy power supply. To address this issue, the embodiments of this invention provide the aforementioned method, which can improve the response capability and anti-fluctuation capability of the coupled system, thereby improving the absorption capacity and utilization efficiency of renewable energy. The embodiments of this invention establish a coupled system comprising an electrochemical water treatment device and an electrolytic water hydrogen production device, achieving zero-discharge treatment of oilfield produced water and co-production of hydrogen; the energy storage device stores electrical energy during periods of high renewable energy availability and provides auxiliary power supply during off-peak periods, effectively mitigating renewable energy fluctuations and improving system power supply stability; the controller is used to adjust the start-up and shutdown states of the electrochemical water treatment device and the electrolytic water hydrogen production device at different times. Simultaneously, the addition of a water storage device enables decoupled operation of the electrochemical water treatment device and the electrolytic water hydrogen production device, allowing the controller to independently control the operation of different devices, thus improving the system's response capability and anti-fluctuation capability.

[0053] It should be noted that the electricity generated by the renewable energy power generation device can be separately supplied to energy storage devices for storage, and to electrochemical water treatment devices and water electrolysis hydrogen production devices for power supply. The electrochemical water treatment device includes an electrolyzer and a filtration device, used to treat organic waste in the produced water while generating some hydrogen. The treated produced water can then be separately supplied to a water storage device for storage and to the water electrolysis hydrogen production device for hydrogen production. The water electrolysis hydrogen production device is mainly an alkaline electrolyzer, which produces hydrogen by electrolyzing pretreated produced water. The controller is used to control the start and stop of the electrochemical water treatment device and the water electrolysis hydrogen production device for each time period, the charging and discharging and power control of the energy storage device, and the water storage, discharging and flow control of the water storage device.

[0054] It should be noted that the renewable energy power generation device can be a photovoltaic power generation device with an installed capacity of up to 100kW, equipped with a maximum power point tracking (MPPT) controller; the renewable energy power generation device can also be a wind power generation device with an installed capacity of 50kW, equipped with a variable speed constant frequency control system. The electrochemical water treatment device can include an electrolyzer, employing highly efficient electrochemical oxidation technology, with a treatment capacity of up to 10m³. 3 / h; The electrochemical water treatment device may also include a filtration device, which may include a multi-stage filter and an activated carbon adsorption device, for removing suspended solids and organic pollutants from the treated water. The water electrolysis hydrogen production device may include an alkaline electrolyzer with a hydrogen production capacity of 5Nm³. 3 / h, electrolysis efficiency 75%. The energy storage device can include a lithium-ion battery with a storage capacity of 200kWh and a charge / discharge efficiency of 95%. The water storage device can be a water tank with a capacity of 50m³. 3 It is equipped with a liquid level sensor and a flow control valve. The controller can be a PLC-based control system that can utilize integrated energy management algorithms to achieve coordinated control of renewable energy power generation, energy storage devices, electrochemical water treatment devices, and water electrolysis hydrogen production devices.

[0055] It should be noted that during peak renewable energy periods, the total power output of photovoltaic and wind power generation can reach 150kW, with the electrochemical water treatment unit and the water electrolysis hydrogen production unit operating in tandem. After treatment by the electrochemical water treatment unit, the produced water directly enters the alkaline electrolyzer to produce hydrogen. The controller stores excess electrical energy in the lithium-ion battery. During off-peak renewable energy periods, the total power output of photovoltaic and wind power generation may drop to 20kW. Based on the integrated energy management algorithm, the preset power threshold can be set at 70%, and the preset water threshold can be set at 30%. If the energy storage device's state of charge is higher than 70% at this time, the energy storage device will discharge to assist in power supply. If the electrolyzer cannot maintain stable operation for 3 hours under low load coupling, and the water level in the storage device is lower than 30%, the electrochemical water treatment unit will continue to operate, and the treated produced water will be stored in the storage device. When the water level in the storage device is higher than 30%, the water electrolysis hydrogen production unit will operate, and the water storage device will provide the water source.

[0056] It should be noted that this embodiment of the invention achieves zero-discharge treatment of oilfield produced water while simultaneously producing hydrogen. The electrochemical water treatment device achieves a treatment efficiency of over 95%, and the removal rate of organic pollutants in the produced water exceeds 90%. The system can process 10m³ of produced water per hour. 3 Produced water, and co-produced 5Nm 3 Hydrogen gas enables efficient resource utilization. Through the coordinated control of the coupled electrochemical water treatment unit and the water electrolysis hydrogen production unit, as well as the energy storage unit and the water storage unit, the system can operate stably even under renewable energy fluctuations, improving the overall system operating efficiency by approximately 15%–20% and mitigating renewable energy fluctuations by approximately 30%–40%. The introduction of the water storage unit makes the decoupled operation of the electrochemical water treatment unit and the water electrolysis hydrogen production unit possible, reducing the system response time by 50%. This invention is applicable to small oil fields or distributed energy scenarios.

[0057] This invention obtains the output power of the power supply and the charge of the energy storage device. If the output power of the power supply is less than a preset first power threshold, and the charge of the energy storage device is greater than a preset charge threshold, the power supply and the energy storage device are controlled to simultaneously supply power to the water electrolysis hydrogen production component. The output power of the power supply being less than the preset first power threshold indicates that the water electrolysis hydrogen production component cannot operate solely with the power supply. Therefore, an energy storage device is added. If the output power of the power supply is too low, the power supply and the energy storage device are controlled to simultaneously supply power to the water electrolysis hydrogen production component, ensuring its normal operation. This avoids the need to wait due to insufficient power supply output power, thus improving the hydrogen production efficiency of water electrolysis.

[0058] Based on the same inventive concept, and referring to Figure 4 As shown, this embodiment of the invention provides a control device 10 for a water electrolysis hydrogen production system. The water electrolysis hydrogen production system includes a power supply, an energy storage device, and a water electrolysis hydrogen production component. The first output terminal of the power supply is electrically connected to the input terminal of the energy storage device, the second output terminal of the power supply is electrically connected to the input terminal of the water electrolysis hydrogen production component, and the output terminal of the energy storage device is electrically connected to the input terminal of the water electrolysis hydrogen production component. The control device 10 for the water electrolysis hydrogen production system includes: an information acquisition unit 110, used to acquire the output power of the power supply and the charge of the energy storage device; and a power supply control unit 120, used to control the power supply and the energy storage device to simultaneously supply power to the water electrolysis hydrogen production component if the output power of the power supply is less than a preset first power threshold and the charge of the energy storage device is greater than a preset charge threshold.

[0059] The water electrolysis hydrogen production assembly includes a water treatment device, a water storage device, and a hydrogen production device. The second output terminal of the power supply includes a first output sub-terminal and a second output sub-terminal. The output terminal of the energy storage device includes a first output terminal and a second output terminal. The power supply terminal of the water treatment device is electrically connected to the first output sub-terminal of the power supply and the first output terminal of the energy storage device, respectively. The first output terminal of the water treatment device is connected to the input terminal of the water storage device. The second output terminal of the water treatment device is connected to the first input terminal of the hydrogen production device. The output terminal of the water storage device is connected to the second input terminal of the hydrogen production device. The power supply terminal of the hydrogen production device is electrically connected to the second output sub-terminal of the power supply and the second output terminal of the energy storage device, respectively.

[0060] Understandably, the power supply control unit 120 is specifically used for: acquiring the coordinated output power of the power supply and the energy storage device; if the coordinated output power is greater than or equal to a first power threshold, controlling both the power supply and the energy storage device to be in a discharging state, and controlling both the water treatment device and the hydrogen production device to be in an on-state, so that the water treatment device and the hydrogen production device operate in a coupled manner; if the coordinated output power is less than the first power threshold, controlling both the power supply and the energy storage device to be in a discharging state, and acquiring the water storage capacity of the water storage device; based on the water storage capacity of the water storage device, controlling the operating states of the water treatment device, the hydrogen production device, and the water storage device, so that the water treatment device and the hydrogen production device operate in a decoupled manner.

[0061] It is understood that the control device 10 of the water electrolysis hydrogen production system further includes: a first control unit, used to control the power supply to be in a discharging state and to obtain the water storage capacity of the water storage device if the output power of the power supply is less than a first power threshold, the output power of the power supply is greater than a preset second power threshold, and the charge of the energy storage device is less than or equal to a preset charge threshold; wherein the second power threshold is less than the first power threshold; and based on the water storage capacity of the water storage device, to control the working state of the water treatment device, the hydrogen production device and the water storage device so that the water treatment device and the hydrogen production device operate in decoupled order.

[0062] The system controls the operating status of the water treatment device, hydrogen production device, and water storage device based on the water storage capacity of the water storage device. This includes: if the water storage capacity of the water storage device is greater than a preset water volume threshold, controlling the water treatment device to be in a shutdown state, the hydrogen production device to be in a startup state, and connecting the output end of the water storage device to the second input end of the hydrogen production device; if the water storage capacity of the water storage device is less than or equal to the preset water volume threshold, controlling the water treatment device to be in a startup state, the hydrogen production device to be in a shutdown state, and connecting the first output end of the water treatment device to the input end of the water storage device.

[0063] It is understood that the control device 10 of the water electrolysis hydrogen production system also includes: a second control unit, which is used to control both the water treatment device and the hydrogen production device to be in a shutdown state, control the power supply to be in a discharge state, and control the energy storage device to store the output electrical energy of the power supply if the output power of the power supply is less than or equal to a second power threshold and the charge of the energy storage device is less than or equal to a preset charge threshold.

[0064] It is understood that the control device 10 of the water electrolysis hydrogen production system also includes: a third control unit, which controls the power supply to supply power to the water treatment device and the hydrogen production device if the output power of the power supply is greater than or equal to the first power threshold, and controls the energy storage device to store the output electrical energy of the power supply.

[0065] The power supply is a renewable energy power generation device, and the wastewater before treatment by the water treatment device is produced water from the oil field.

[0066] It should be understood that further implementation details of the control device 10 of the water electrolysis hydrogen production system in the embodiments of the present invention are as described in the aforementioned control method of the water electrolysis hydrogen production system, and will not be repeated here for the sake of brevity.

[0067] Based on the same inventive concept, embodiments of the present invention also provide an electronic device, such as... Figure 5 As shown, the system includes a memory 504, a processor 502, and a computer program stored in the memory 504 and executable on the processor 502. The processor 502 executes the program to implement the steps described in any embodiment of the control method for the water electrolysis hydrogen production system.

[0068] Among them, Figure 5 In this document, a bus architecture (represented by bus 500) is used. Bus 500 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 502 and memory represented by memory 504. Bus 500 may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 505 provides an interface between bus 500 and receiver 501 and transmitter 503. Receiver 501 and transmitter 503 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 502 is responsible for managing bus 500 and general processing, while memory 504 can be used to store data used by processor 502 during operation.

[0069] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this invention and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units can be integrated into a single processing unit, or each unit can exist physically separately, or two or more units can be integrated into a single unit.

[0070] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0071] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0072] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0073] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A control method for a water electrolysis hydrogen production system, characterized in that, The water electrolysis hydrogen production system includes a power supply, an energy storage device, and a water electrolysis hydrogen production assembly. A first output terminal of the power supply is electrically connected to the input terminal of the energy storage device, a second output terminal of the power supply is electrically connected to the input terminal of the water electrolysis hydrogen production assembly, and the output terminal of the energy storage device is electrically connected to the input terminal of the water electrolysis hydrogen production assembly. The method includes: Obtain the output power of the power supply and the charge of the energy storage device; If the output power of the power supply is less than a preset first power threshold and the charge of the energy storage device is greater than a preset charge threshold, the power supply and the energy storage device are controlled to simultaneously supply power to the water electrolysis hydrogen production component.

2. The control method for the water electrolysis hydrogen production system according to claim 1, characterized in that, The water electrolysis hydrogen production assembly includes a water treatment device, a water storage device, and a hydrogen production device. The second output terminal of the power supply includes a first output sub-terminal and a second output sub-terminal. The output terminal of the energy storage device includes a first output terminal and a second output terminal. The power supply terminal of the water treatment device is electrically connected to the first output sub-terminal of the power supply and the first output terminal of the energy storage device, respectively. The first output terminal of the water treatment device is connected to the input terminal of the water storage device. The second output terminal of the water treatment device is connected to the first input terminal of the hydrogen production device. The output terminal of the water storage device is connected to the second input terminal of the hydrogen production device. The power supply terminal of the hydrogen production device is electrically connected to the second output sub-terminal of the power supply and the second output terminal of the energy storage device, respectively.

3. The control method for the water electrolysis hydrogen production system according to claim 2, characterized in that, The control of simultaneously supplying power to the water electrolysis hydrogen production assembly by the power supply and the energy storage device includes: Obtain the combined output power of the power supply and the energy storage device; If the coordinated output power is greater than or equal to the first power threshold, the power supply and the energy storage device are both controlled to be in a discharge state, and the water treatment device and the hydrogen production device are both controlled to be in an on state, so that the water treatment device and the hydrogen production device operate in a coupled manner. If the cooperative output power is less than the first power threshold, the power supply and the energy storage device are both controlled to be in a discharge state, and the water storage capacity of the water storage device is obtained; based on the water storage capacity of the water storage device, the working state of the water treatment device, the hydrogen production device and the water storage device are controlled so that the water treatment device and the hydrogen production device operate in decoupled order.

4. The control method for the water electrolysis hydrogen production system according to claim 2, characterized in that, Also includes: If the output power of the power supply is less than the first power threshold, the output power of the power supply is greater than the preset second power threshold, and the charge of the energy storage device is less than or equal to the preset charge threshold, the power supply is controlled to be in a discharging state, and the water storage capacity of the water storage device is obtained; wherein, the second power threshold is less than the first power threshold; Based on the water storage capacity of the water storage device, the operating status of the water treatment device, the hydrogen production device, and the water storage device is controlled so that the water treatment device and the hydrogen production device operate in decoupled order.

5. The control method for the water electrolysis hydrogen production system according to any one of claims 3 or 4, characterized in that, The method of controlling the operating status of the water treatment device, the hydrogen production device, and the water storage device based on the water storage capacity of the water storage device includes: If the water storage capacity of the water storage device is greater than the preset water volume threshold, the water treatment device is controlled to be in a shutdown state, the hydrogen production device is controlled to be in a startup state, and the output end of the water storage device is connected to the second input end of the hydrogen production device. If the water storage capacity of the water storage device is less than or equal to the preset water volume threshold, the water treatment device is controlled to be in the start-up state, the hydrogen production device is controlled to be in the shutdown state, and the first output terminal of the water treatment device is connected to the input terminal of the water storage device.

6. The control method for the water electrolysis hydrogen production system according to claim 4, characterized in that, Also includes: If the output power of the power supply is less than or equal to the second power threshold, and the charge of the energy storage device is less than or equal to the preset charge threshold, the water treatment device and the hydrogen production device are both controlled to be in a shutdown state, the power supply is controlled to be in a discharge state, and the energy storage device is controlled to store the output electrical energy of the power supply.

7. The control method for the water electrolysis hydrogen production system according to claim 2, characterized in that, Also includes: If the output power of the power supply is greater than or equal to the first power threshold, the power supply is controlled to supply power to the water treatment device and the hydrogen production device, and the energy storage device is controlled to store the output power of the power supply.

8. The control method for the water electrolysis hydrogen production system according to any one of claims 2-4, characterized in that, The power supply is a renewable energy power generation device, and the wastewater before treatment by the water treatment device is produced water from the oil field.

9. A control device for a water electrolysis hydrogen production system, characterized in that, The water electrolysis hydrogen production system includes a power supply, an energy storage device, and a water electrolysis hydrogen production component. The first output terminal of the power supply is electrically connected to the input terminal of the energy storage device, the second output terminal of the power supply is electrically connected to the input terminal of the water electrolysis hydrogen production component, and the output terminal of the energy storage device is electrically connected to the input terminal of the water electrolysis hydrogen production component. The device includes: The information acquisition unit is used to acquire the output power of the power supply and the charge of the energy storage device; The power supply control unit is configured to control the power supply and the energy storage device to simultaneously supply power to the water electrolysis hydrogen production assembly if the output power of the power supply is less than a preset first power threshold and the charge of the energy storage device is greater than a preset charge threshold.

10. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method of any one of claims 1-8.

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