CN117721499A - Water electrolysis hydrogen production system and wide-range operation control method and device thereof - Google Patents

Abstract

The invention relates to the technical field of electrolytic hydrogen production, and discloses a water electrolysis hydrogen production system, a wide-range operation control method and a device thereof, wherein the wide-range operation control method comprises the following steps: obtaining the current density of the electrolytic cell group; when the current density is smaller than a first threshold value, regulating and controlling a target pressure set value of the hydrogen side; and adjusting the hydrogen side pressure according to the target hydrogen side pressure set value, wherein the oxygen side pressure follows the hydrogen side pressure. Through the pressure reduction regulation under low current, the hydrogen content in oxygen of the electrolytic hydrogen production system under low current is reduced, the operation range of hydrogen production is widened, and the adaptability is improved.

Description

A water electrolysis hydrogen production system and its wide-range operation control method and device

Technical field

The invention relates to the technical field of water electrolysis and hydrogen production, and specifically relates to a water electrolysis hydrogen production system and its wide range operation control method and device.

Background technique

Hydrogen is a clean and efficient secondary energy that cannot be obtained directly from nature and must be prepared. Among the current hydrogen production routes, the electrolysis of water to produce hydrogen has no carbon emissions and the process is simple. It is an important way to produce hydrogen in the future. In particular, the use of renewable energy to produce hydrogen is a hydrogen production method that can achieve zero carbon emissions in the entire cycle. And storing the produced hydrogen can also realize large-scale consumption of renewable energy power and solve the imbalance between power supply and demand.

Renewable energy power has randomness and volatility characteristics, which will bring different types, different amplitudes, and different frequencies of power fluctuations. Electrolyzers will operate in conditions such as frequent starts and stops, low loads/overloads, and power surges, such as If not controlled, it will affect the life and durability of the electrolyzer. Especially under low load conditions, the operating current density of the electrolytic cell is too low, the hydrogen production is limited, and the hydrogen content in oxygen is high, which brings hidden dangers to the safe operation of the cell. However, when applied to renewable energy scenarios, having a wide range of operating capabilities is key. Therefore, it is necessary to reduce safe operation problems under low load conditions and improve the electrolysis operating range.

Contents of the invention

In view of this, the present invention provides a water electrolysis hydrogen production system and its wide-range operation control method and device to solve the problem of small electrolysis operation range.

In a first aspect, the present invention provides a wide-range operation control method for an electrolytic water hydrogen production system. The method includes:

Obtain the current density of the electrolyzer group;

When the current density is less than the first threshold, adjust the hydrogen side target pressure setting value;

The hydrogen side pressure is adjusted according to the hydrogen side target pressure setting value, and the oxygen side pressure follows the hydrogen side pressure.

In an optional implementation, when the current density is less than the first threshold, regulating the hydrogen side target pressure setting value includes:

Calculate the upper limit of the allowed setting value of hydrogen side pressure according to the current density;

Monitor the current operating pressure on the hydrogen side;

When the operating pressure is greater than the upper limit of the set value allowed for the hydrogen side pressure, the hydrogen side target pressure is set to the upper limit of the set value;

When the operating pressure is not greater than the upper limit of the allowable setting value of the hydrogen side pressure, the hydrogen side target pressure setting value will not be adjusted.

In an optional embodiment, the method further includes: monitoring the proportion of hydrogen content in oxygen in the gas discharged from the anode side of the electrolytic cell group, and when the proportion of hydrogen content in oxygen is greater than the second threshold, reducing the proportion of hydrogen in the electrolytic cell group. temperature.

In an optional embodiment, the method further includes: when the proportion of hydrogen in oxygen is greater than a third threshold, releasing the gas generated on the anode side of the electrolytic cell group and performing an alarm action, and the third The threshold is greater than the second threshold.

In an optional embodiment, reducing the temperature of the electrolytic cell group includes:

Monitor the temperature of the electrolyser bank;

Gradually reduce the temperature setting value of the electrolytic cell group according to the preset step size;

Increase the speed of the circulating water pump, increase the water supply flow of the electrolytic cell group, and adjust the temperature of the electrolytic cell group to the temperature set value;

When the proportion of hydrogen content in oxygen is not greater than the second threshold, the temperature setting value of the electrolytic cell group is no longer reduced.

In an optional implementation, the calculation formula for the upper limit of the allowable setting value of hydrogen side pressure is as follows:

Among them, H ₂ in O ₂ (%) is the proportion of hydrogen content in oxygen, H ₂ in O ₂ (%) ≤ 1%; i is the current density; F is Faraday’s constant, the value is 96485; is the amount of hydrogen permeating to the oxygen side, ε ^dif is the diffusion constant due to concentration difference, di is the diffusion coefficient,/> is the hydrogen side pressure, δ _mem is the film thickness,/> is the diffusion constant caused by the pressure difference,/> is the oxygen side pressure, ζ is the electroosmotic drag coefficient,/> is the partial pressure of hydrogen penetrating to the oxygen side, S is the solubility, and C(H ₂ O) is the molar concentration of water.

In an optional implementation, the method further includes: executing normal operating logic when the current density is not less than the first threshold.

In a second aspect, the present invention provides a wide-range operation control device for an electrolysis water hydrogen production system. The device includes:

Monitoring module, used to obtain the current density of the electrolyzer group;

A set value control module, used to control the hydrogen side target pressure set value when the current density is less than the first threshold;

A pressure adjustment module is used to adjust the hydrogen side pressure according to the hydrogen side target pressure setting value, and the oxygen side pressure follows the hydrogen side pressure.

In a third aspect, the present invention provides a hydrogen production system by electrolyzing water. The system includes: an electrolytic cell group, a power supply, a DC/DC converter, a hydrogen side separator, an oxygen side separator, a hydrogen purification device, and a hydrogen storage device. Device, hydrogen content monitoring device in oxygen, circulating water pump, heat exchanger, water replenishment device, current monitoring component, temperature monitoring component, hydrogen side pressure monitoring component, oxygen side pressure monitoring component, hydrogen side pressure valve, oxygen side pressure valve, control device, among which,

The power supply supplies power to the electrolytic cell group through the DC/DC converter, and the current monitoring component is used to monitor the current input from the power supply to the electrolytic cell group;

The electrolytic cell group electrolyzes consumed water to produce hydrogen and oxygen. The hydrogen enters the hydrogen side separator to separate hydrogen and water. The separated hydrogen is purified by the hydrogen purification device and stored in the hydrogen storage. In the device, the oxygen enters the oxygen side separator to separate oxygen and water, and the separated water flows back to the electrolytic cell group through the circulating water pump and the heat exchanger;

The hydrogen side pressure valve is used to adjust the hydrogen side pressure;

The oxygen side pressure valve is used to adjust the oxygen side pressure;

The water replenishing device is used to replenish the electrolyzed water of the electrolytic cell group;

The hydrogen side pressure monitoring component is used to monitor the internal pressure of the hydrogen side separator, the oxygen side pressure monitoring component is used to monitor the internal pressure of the oxygen side separator, and the hydrogen content monitoring device in oxygen is used to monitor electrolysis. The proportion of hydrogen content in oxygen in the gas discharged from the anode side of the tank group;

The temperature monitoring component is used to monitor the temperature of the electrolyzed water in the electrolytic cell group;

A controller. The controller includes: a memory and a processor. The memory and the processor are communicatively connected to each other. Computer instructions are stored in the memory. The processor executes the computer instructions by executing the computer instructions. The wide-range operation control method of the water electrolysis hydrogen production system of the above first aspect or any corresponding embodiment thereof.

In a fourth aspect, the present invention provides a computer-readable storage medium. Computer instructions are stored on the computer-readable storage medium. The computer instructions are used to cause the computer to execute the electrolysis of water according to the above-mentioned first aspect or any of its corresponding embodiments. Wide range operation control method of hydrogen production system.

The invention provides a wide-range operation control method for an electrolysis water hydrogen production system. The method includes: obtaining the current density of the electrolytic cell group; when the current density is less than the first threshold, regulating the hydrogen side target pressure setting value; according to the hydrogen side target The pressure set value adjusts the hydrogen side pressure, and the oxygen side pressure follows the hydrogen side pressure. Through voltage reduction regulation under low current, the hydrogen content in oxygen under low electricity density of the electrolytic hydrogen production system is reduced, the operating range of hydrogen production is broadened, and the adaptability is improved.

The invention provides a wide-range operation control device for an electrolytic water hydrogen production system. The device includes: a monitoring module for obtaining the current density of an electrolytic cell group; and a set value control module for when the current density is less than a first threshold, Regulating the hydrogen side target pressure setting value; the pressure adjustment module is used to adjust the hydrogen side pressure according to the hydrogen side target pressure setting value, and the oxygen side pressure follows the hydrogen side pressure.

The invention provides an electrolytic water hydrogen production system, which includes: an electrolytic cell group, a power supply, a DC/DC converter, a hydrogen side separator, an oxygen side separator, a hydrogen purification device, a hydrogen storage device, and a hydrogen content monitoring device in oxygen. , circulating water pump, heat exchanger, water replenishment device, current monitoring component, temperature monitoring component, hydrogen side pressure monitoring component, oxygen side pressure monitoring component, hydrogen side pressure valve, oxygen side pressure valve, controller. Among them, the controller is communicatively connected with each of the above components, and is used to control the cooperation of various components of the electrolytic water hydrogen production system to perform electrolytic water hydrogen production. Based on the electrolysis water hydrogen production system with pressure adjustment capability, pressure reduction regulation is performed under low current conditions to reduce the hydrogen content in oxygen under low electricity density of the electrolysis hydrogen production system and broaden the operating range of hydrogen production.

Description of the drawings

In order to more clearly explain the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description The drawings illustrate some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting any creative effort.

Figure 1 is a schematic diagram of a water electrolysis hydrogen production system according to an embodiment of the present invention;

Figure 2 is a schematic flowchart of a wide-range operation control method of a water electrolysis hydrogen production system according to an embodiment of the present invention;

Figure 3 shows the variation trend of the amount of hydrogen permeating from the hydrogen side to the oxygen side with pressure according to an embodiment of the present invention;

Figure 4 shows the variation trend of the amount of hydrogen permeating from the hydrogen side to the oxygen side with temperature according to an embodiment of the present invention;

Figure 5 is a structural block diagram of a wide-range operation control device for an electrolytic water hydrogen production system according to an embodiment of the present invention;

Figure 6 is a schematic diagram of the hardware structure of the controller according to the embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present invention.

Hydrogen is a clean and efficient secondary energy that cannot be obtained directly from nature and must be prepared. Among the current hydrogen production routes, the electrolysis of water to produce hydrogen has no carbon emissions and a simple process. It is an important hydrogen production route in the future. As shown in Figure 1, it is an electrolytic water hydrogen production system, including: electrolyzer group, power supply, DC/DC converter, hydrogen side separator, oxygen side separator, hydrogen purification device, hydrogen storage device, hydrogen in oxygen Content monitoring device, circulating water pump, heat exchanger, water replenishment device, current monitoring component, temperature monitoring component, hydrogen side pressure monitoring component, oxygen side pressure monitoring component, hydrogen side pressure valve, oxygen side pressure valve, controller. In Figure 1, the heat exchanger is shown using an air-cooled heat exchanger as an example.

Among them, the power supply supplies power to the electrolytic cell group through a DC/DC converter, and the current monitoring component is used to monitor the current input from the power supply to the electrolytic cell group. The electrolytic cell group electrolyzes the consumed water to produce hydrogen and oxygen. The hydrogen enters the hydrogen side separator for separation of hydrogen and water. The separated hydrogen is purified by the hydrogen purification device and stored in the hydrogen storage device. The oxygen enters the oxygen side separator. The oxygen and water are separated, and the separated water flows back to the electrolytic cell group through the circulating water pump and heat exchanger. The hydrogen side pressure valve is used to adjust the hydrogen side pressure. The oxygen side pressure valve is used to adjust the oxygen side pressure. The water replenishing device is used to replenish the electrolyzed water of the electrolytic cell group. The hydrogen side pressure monitoring component is used to monitor the internal pressure of the hydrogen side separator, the oxygen side pressure monitoring component is used to monitor the internal pressure of the oxygen side separator, and the hydrogen content monitoring device in oxygen is used to monitor the oxygen content in the gas discharged from the anode side of the electrolytic cell group. Hydrogen content ratio. The temperature monitoring component is used to monitor the temperature of the electrolyzed water in the electrolyzer group. The controller is connected through communication with each of the above components, and is used to control the cooperation of various components of the electrolytic water hydrogen production system to perform electrolytic water hydrogen production.

The invention provides a wide-range operation control method for an electrolytic water hydrogen production system. Based on the operating characteristics of the electrolytic water hydrogen production system, a wide-range operation control method based on pressure and temperature adjustment is proposed to broaden the lower limit of hydrogen production operation and improve its impact on renewable energy. Fluctuation adaptability.

According to the embodiment of the present invention, an embodiment of a wide-range operation control method for an electrolytic water hydrogen production system is provided. It should be noted that although the logical sequence is shown in the flow chart, in some cases, it can be performed in a different manner than The sequence here performs the steps shown or described. Figure 2 is a flow chart of a wide-range operation control method of a water electrolysis hydrogen production system according to an embodiment of the present invention. As shown in Figure 2, the process includes the following steps:

Step S1: Obtain the current density of the electrolytic cell group.

In a specific embodiment, the current input from the power supply to the electrolytic cell group through the DC/DC converter is monitored, the area of the electrolytic cell is calculated, and the current density is calculated based on the current and area of the electrolytic cell group, that is, the current density is equal to the current divided by the area.

Step S2: When the current density is less than the first threshold, adjust the hydrogen side target pressure setting value.

In a specific embodiment, when the current density is less than the first threshold, it is determined that the water electrolysis hydrogen production system is operating in a low load condition. Among them, the first threshold can be specifically determined according to the actual level of the manufacturer's electrolytic cell. Under low load conditions, the system's hydrogen production is limited and the hydrogen content in oxygen is high, which brings hidden dangers to the safe operation of the tank. As shown in Figure 3, according to the principle of hydrogen and oxygen cross-penetration, the amount of hydrogen permeating from the hydrogen side to the oxygen side will decrease as the pressure decreases. Therefore, under low load conditions, it is necessary to adjust the target pressure setting value of the hydrogen side. Pressure reduction adjustment reduces the hydrogen content in oxygen under low electricity density of the electrolytic hydrogen production system.

Step S3: Adjust the hydrogen side pressure according to the hydrogen side target pressure setting value, and the oxygen side pressure follows the hydrogen side pressure.

In a specific embodiment, the hydrogen side pressure is adjusted by adjusting the hydrogen side pressure valve according to the hydrogen side target pressure setting value. At the same time, by adjusting the oxygen side pressure valve, the oxygen side pressure is adjusted to be consistent with the hydrogen side real-time pressure.

The invention provides a wide-range operation control method for an electrolysis water hydrogen production system. The method includes: obtaining the current density of the electrolytic cell group; when the current density is less than the first threshold, regulating the hydrogen side target pressure setting value; according to the hydrogen side target The pressure set value adjusts the hydrogen side pressure, and the oxygen side pressure follows the hydrogen side pressure. Through voltage reduction regulation under low current, the hydrogen content in oxygen under low electricity density of the electrolytic hydrogen production system is reduced, the operating range of hydrogen production is broadened, and the adaptability is improved.

In an optional implementation, step S2 includes the following process:

Step S21: Calculate the upper limit of the allowable setting value of the hydrogen side pressure based on the current density.

In a specific embodiment, since under normal working conditions, the proportion of hydrogen in oxygen in the gas discharged from the anode side of the electrolytic cell group is not more than 1%, according to this inequality relationship, the upper limit of the allowable setting value of the hydrogen side pressure can be obtained . The calculation formula for the upper limit of the specific allowable setting value of hydrogen side pressure is as follows:

Among them, H ₂ in O ₂ (%) is the proportion of hydrogen content in oxygen, H ₂ in O ₂ (%) ≤ 1%; i is the current density; F is Faraday’s constant, the value is 96485; is the amount of hydrogen permeating to the oxygen side, ε ^dif is the diffusion constant due to concentration difference, di is the diffusion coefficient,/> is the hydrogen side pressure, δ _mem is the film thickness,/> is the diffusion constant caused by the pressure difference,/> is the oxygen side pressure, ζ is the electroosmotic drag coefficient,/> is the partial pressure of hydrogen penetrating to the oxygen side, S is the solubility, and C(H ₂ O) is the molar concentration of water.

Step S22, monitor the current operating pressure on the hydrogen side.

Step S23: When the operating pressure is greater than the upper limit of the allowable set value of the hydrogen side pressure, the hydrogen side target pressure is set to the upper limit of the set value.

Step S24, when the operating pressure is not greater than the upper limit of the allowable setting value of the hydrogen side pressure, the hydrogen side target pressure setting value is not adjusted.

In a specific embodiment, the current operating pressure of the hydrogen side is monitored through a hydrogen side pressure monitoring component. If the current operating pressure on the hydrogen side is greater than the upper limit of the allowed setting value of the hydrogen side pressure, set the hydrogen side target pressure to the upper setting value. If the current operating pressure of the hydrogen side is less than or equal to the upper limit of the allowed setting value of the hydrogen side pressure. , no pressure control is performed.

In an optional implementation, the method further includes:

Step S4: Monitor the proportion of hydrogen content in oxygen in the gas discharged from the anode side of the electrolytic cell group. When the proportion of hydrogen content in oxygen is greater than the second threshold, reduce the temperature of the electrolytic cell group.

In a specific embodiment, under low load conditions, in order to further reduce the hydrogen content in oxygen under low density of the electrolytic hydrogen production system, on the basis of pressure reduction adjustment, the hydrogen gas penetrating from the hydrogen side to the oxygen side is considered The amount will also decrease as the temperature decreases, and the temperature can also be adjusted by cooling. The amount of hydrogen permeating from the hydrogen side to the oxygen side changes with temperature as shown in Figure 4. Specifically, the proportion of hydrogen content in oxygen in the gas discharged from the anode side of the electrolytic cell group is monitored in real time. Once the proportion of hydrogen content in oxygen is greater than the second threshold, the temperature of the electrolytic cell group is lowered, thereby reducing the hydrogen content in oxygen to avoid giving The safe operation of the tank brings hidden dangers. At the same time, the amount of hydrogen penetrating into the oxygen side decreases, and the amount of hydrogen on the hydrogen side increases, which is conducive to improving the efficiency of electrolytic hydrogen production. Wherein, the second threshold is 1%. The present invention reduces the hydrogen content in oxygen under low electricity density of the electrolytic hydrogen production system through temperature and pressure reduction regulation under low current, broadens the operating range of hydrogen production, and improves adaptability.

In an optional implementation, the method further includes:

Step S5: When the proportion of hydrogen content in oxygen is greater than the third threshold, the gas generated on the anode side of the electrolytic cell group is released and an alarm action is performed. The third threshold is greater than the second threshold.

In a specific embodiment, under low load conditions, the proportion of hydrogen content in oxygen is monitored. When the proportion of hydrogen content in oxygen is greater than the third threshold, the protection is triggered, the oxygen side pressure valve is opened to the maximum, and the gas is released. release and perform alarm action. Among them, the third threshold is 2%.

In an optional embodiment, the temperature of the electrolytic cell group is reduced by the following steps:

Step S41, monitor the temperature of the electrolytic cell group.

Step S42, gradually reduce the temperature setting value of the electrolytic cell group according to a preset step size.

Step S43, increase the rotation speed of the circulating water pump, increase the water supply flow rate of the electrolytic cell group, and adjust the temperature of the electrolytic cell group to the temperature set value.

Step S44: When the proportion of hydrogen content in oxygen is not greater than the second threshold, the temperature setting value of the electrolytic cell group is no longer reduced.

In a specific embodiment, under low load conditions, the temperature of the electrolytic cell group and the proportion of hydrogen content in oxygen are monitored, and the temperature setting value of the electrolytic cell group is gradually reduced according to a preset step size. The preset step size may be 5℃. At the same time, by increasing the speed of the circulating water pump, the water supply flow rate of the electrolytic cell group is increased, and the temperature of the electrolytic cell group is adjusted to the temperature set value. When the proportion of hydrogen in oxygen is no more than 1%, the temperature setting value of the electrolytic cell group will no longer be reduced. In the embodiment of the present invention, the temperature setting value of the electrolytic cell group can be reduced to a minimum of 40°C.

In an optional implementation, the method further includes:

Step S6: When the current density is not less than the first threshold, execute the normal operating logic.

In a specific embodiment, when the current density is not less than the first threshold, it is determined that the water electrolysis hydrogen production system is operating under normal operating conditions. Under normal working conditions, just execute the existing mature operation logic.

This embodiment also provides a wide-range operation control device for an electrolytic water hydrogen production system. This device is used to implement the above-mentioned embodiments and preferred implementations. What has already been described will not be described again. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.

The invention provides a wide-range operation control device for an electrolysis water hydrogen production system. As shown in Figure 5, the device includes:

Monitoring module 31 is used to obtain the current density of the electrolytic cell group;

The set value control module 32 is used to control the hydrogen side target pressure set value when the current density is less than the first threshold;

The pressure adjustment module 33 is used to adjust the hydrogen side pressure according to the hydrogen side target pressure setting value, and the oxygen side pressure follows the hydrogen side pressure.

Further functional descriptions of each of the above modules are the same as those in the above corresponding embodiments, and will not be described again here.

The wide-range operation control device of the electrolytic water hydrogen production system in this embodiment is presented in the form of a functional unit. The unit here refers to an ASIC (Application Specific Integrated Circuit) circuit that executes one or more software or fixed Program processor and memory, and/or other devices that can provide the above functions.

The invention provides a wide-range operation control device for an electrolytic water hydrogen production system. The device includes: a monitoring module for obtaining the current density of an electrolytic cell group; and a set value control module for when the current density is less than a first threshold, Regulating the hydrogen side target pressure setting value; the pressure adjustment module is used to adjust the hydrogen side pressure according to the hydrogen side target pressure setting value, and the oxygen side pressure follows the hydrogen side pressure.

Embodiments of the present invention also provide an electrolytic water hydrogen production system, as shown in Figure 1, including: an electrolytic cell group, a power supply, a DC/DC converter, a hydrogen side separator, an oxygen side separator, a hydrogen purification device, and a hydrogen storage device. Device, hydrogen content monitoring device in oxygen, circulating water pump, heat exchanger, water replenishment device, current monitoring component, temperature monitoring component, hydrogen side pressure monitoring component, oxygen side pressure monitoring component, hydrogen side pressure valve, oxygen side pressure valve, control device. Among them, the controller is communicatively connected with each of the above components, and is used to control the cooperation of various components of the electrolytic water hydrogen production system to perform electrolytic water hydrogen production.

The invention provides an electrolytic water hydrogen production system, which includes: an electrolytic cell group, a power supply, a DC/DC converter, a hydrogen side separator, an oxygen side separator, a hydrogen purification device, a hydrogen storage device, and a hydrogen content monitoring device in oxygen. , circulating water pump, heat exchanger, water replenishment device, current monitoring component, temperature monitoring component, hydrogen side pressure monitoring component, oxygen side pressure monitoring component, hydrogen side pressure valve, oxygen side pressure valve, controller. Among them, the controller is communicatively connected with the above-mentioned components and is used to control the cooperation of various components of the electrolytic water hydrogen production system to perform electrolytic water hydrogen production. Based on the electrolysis water hydrogen production system with pressure adjustment capability, pressure reduction adjustment is performed under low current conditions to reduce the hydrogen content in oxygen under low electricity density of the electrolysis hydrogen production system and broaden the operating range of hydrogen production.

Figure 6 is a schematic structural diagram of a controller provided by an optional embodiment of the present invention. As shown in Figure 6, the controller includes: one or more processors 10, memories 20, and interfaces for connecting various components, including high-speed interface and low-speed interface. Various components communicate with each other using different buses and can be installed on a common motherboard or in other ways as needed. The processor may process instructions executed within the computer device, including instructions stored in or on memory to display graphical information of the GUI on an external input/output device, such as a display device coupled to the interface. In some alternative implementations, multiple processors and/or multiple buses may be used with multiple memories and multiple memories, if desired. Likewise, multiple computer devices may be connected, each device providing part of the necessary operation (eg, as a server array, a set of blade servers, or a multi-processor system). Figure 6 takes a processor 10 as an example.

The processor 10 may be a central processing unit, a network processor, or a combination thereof. The processor 10 may further include a hardware chip. The above-mentioned hardware chip can be an application-specific integrated circuit, a programmable logic device or a combination thereof. The above-mentioned programmable logic device may be a complex programmable logic device, a field programmable logic gate array, a general array logic or any combination thereof.

The memory 20 stores instructions that can be executed by at least one processor 10, so that the at least one processor 10 executes the method shown in the above embodiment.

The memory 20 may include a program storage area and a data storage area, where the program storage area may store an operating system and an application program required for at least one function; the storage data area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid-state storage device. In some optional implementations, the memory 20 may optionally include memories remotely located relative to the processor 10 , and these remote memories may be connected to the computer device through a network. Examples of the above-mentioned networks include but are not limited to the Internet, intranets, local area networks, mobile communication networks and combinations thereof.

The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memories.

The computer device also includes a communication interface 30 for the computer device to communicate with other devices or communication networks.

Embodiments of the present invention also provide a computer-readable storage medium. The above-mentioned method according to the embodiment of the present invention can be implemented in hardware or firmware, or can be recorded in a storage medium, or can be implemented as original storage downloaded through the network. Computer code in a remote storage medium or a non-transitory machine-readable storage medium and to be stored in a local storage medium such that the methods described herein may be stored on a computer using a general purpose computer, a special purpose processor, or programmable or special purpose hardware Such software processing on storage media. The storage medium may be a magnetic disk, an optical disk, a read-only memory, a random access memory, a flash memory, a hard disk or a solid state drive, etc.; further, the storage medium may also include a combination of the above types of memories. It can be understood that a computer, processor, microprocessor controller or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by the computer, processor or hardware, the above implementations are implemented. The method illustrated.

Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope of the appended rights. within the scope of the requirements.

Claims (10)

1. A wide-range operation control method for an electrolytic water hydrogen production system, characterized in that the method includes: Obtain the current density of the electrolyzer group; When the current density is less than the first threshold, adjust the hydrogen side target pressure setting value; The hydrogen side pressure is adjusted according to the hydrogen side target pressure setting value, and the oxygen side pressure follows the hydrogen side pressure. 2. The wide-range operation control method of the electrolytic water hydrogen production system according to claim 1, characterized in that when the current density is less than the first threshold, regulating the hydrogen side target pressure setting value includes: Calculate the upper limit of the allowed setting value of hydrogen side pressure according to the current density; Monitor the current operating pressure on the hydrogen side; When the operating pressure is greater than the upper limit of the set value allowed for the hydrogen side pressure, the hydrogen side target pressure is set to the upper limit of the set value; When the operating pressure is not greater than the upper limit of the allowable setting value of the hydrogen side pressure, the hydrogen side target pressure setting value will not be adjusted. 3. The wide-range operation control method of the electrolyzed water hydrogen production system according to claim 1, characterized in that the method further includes: monitoring the proportion of hydrogen content in oxygen in the gas discharged from the anode side of the electrolytic cell group. When the proportion of hydrogen content is greater than the second threshold, the temperature of the electrolytic cell group is reduced. 4. The wide-range operation control method of the electrolyzed water hydrogen production system according to claim 3, characterized in that the method further includes: when the proportion of hydrogen content in the oxygen is greater than the third threshold, the anode side of the electrolytic cell group is generated The gas is released and an alarm action is performed, and the third threshold is greater than the second threshold. 5. The wide-range operation control method of the electrolyzed water hydrogen production system according to claim 3, characterized in that the reducing the temperature of the electrolytic cell group includes: Monitor the temperature of the electrolyser bank; Gradually reduce the temperature setting value of the electrolytic cell group according to the preset step size; Increase the speed of the circulating water pump, increase the water supply flow of the electrolytic cell group, and adjust the temperature of the electrolytic cell group to the temperature set value; When the proportion of hydrogen content in oxygen is not greater than the second threshold, the temperature setting value of the electrolytic cell group is no longer reduced. 6. The wide-range operation control method of the electrolytic water hydrogen production system according to claim 2, characterized in that the calculation formula for the upper limit of the set value allowed by the hydrogen side pressure is as follows: Among them, H ₂ in O ₂ (%) is the proportion of hydrogen content in oxygen, H ₂ in O ₂ (%) ≤ 1%; i is the current density; F is Faraday’s constant, the value is 96485; is the amount of hydrogen permeating to the oxygen side, ε ^dif is the diffusion constant due to concentration difference, di is the diffusion coefficient,/> is the hydrogen side pressure, δ _mem is the film thickness,/> is the diffusion constant caused by the pressure difference,/> is the oxygen side pressure, ζ is the electroosmotic drag coefficient,/> is the partial pressure of hydrogen permeating to the oxygen side,/> S is the solubility, and C(H ₂ O) is the molar concentration of water. 7. The wide-range operation control method of the electrolytic water hydrogen production system according to claim 1, characterized in that the method further includes: when the current density is not less than a first threshold, executing normal operating conditions operation logic. 8. A wide-range operation control device for an electrolytic water hydrogen production system, characterized in that the device includes: Monitoring module, used to obtain the current density of the electrolyzer group; A set value control module, used to control the hydrogen side target pressure set value when the current density is less than the first threshold; A pressure adjustment module is used to adjust the hydrogen side pressure according to the hydrogen side target pressure setting value, and the oxygen side pressure follows the hydrogen side pressure. 9. An electrolysis water hydrogen production system, characterized in that the system includes: an electrolytic cell group, a power supply, a DC/DC converter, a hydrogen side separator, an oxygen side separator, a hydrogen purification device, and a hydrogen storage device. Hydrogen content monitoring device in oxygen, circulating water pump, heat exchanger, water supply device, current monitoring component, temperature monitoring component, hydrogen side pressure monitoring component, oxygen side pressure monitoring component, hydrogen side pressure valve, oxygen side pressure valve, controller, in, The power supply supplies power to the electrolytic cell group through the DC/DC converter, and the current monitoring component is used to monitor the current input from the power supply to the electrolytic cell group; The electrolytic cell group electrolyzes consumed water to produce hydrogen and oxygen. The hydrogen enters the hydrogen side separator to separate hydrogen and water. The separated hydrogen is purified by the hydrogen purification device and stored in the hydrogen storage. In the device, the oxygen enters the oxygen side separator to separate oxygen and water, and the separated water flows back to the electrolytic cell group through the circulating water pump and the heat exchanger; The hydrogen side pressure valve is used to adjust the hydrogen side pressure; The oxygen side pressure valve is used to adjust the oxygen side pressure; The water replenishing device is used to replenish the electrolyzed water of the electrolytic cell group; The hydrogen side pressure monitoring component is used to monitor the internal pressure of the hydrogen side separator, the oxygen side pressure monitoring component is used to monitor the internal pressure of the oxygen side separator, and the hydrogen content monitoring device in oxygen is used to monitor electrolysis. The proportion of hydrogen content in oxygen in the gas discharged from the anode side of the tank group; The temperature monitoring component is used to monitor the temperature of the electrolyzed water in the electrolytic cell group; A controller. The controller includes: a memory and a processor. The memory and the processor are communicatively connected to each other. Computer instructions are stored in the memory. The processor executes the computer instructions by executing the computer instructions. The wide-range operation control method of an electrolytic water hydrogen production system according to any one of claims 1 to 7. 10. A computer-readable storage medium, characterized in that computer instructions are stored on the computer-readable storage medium, and the computer instructions are used to cause the computer to execute the electrolysis of water according to any one of claims 1 to 7. Wide range operation control method of hydrogen production system.