Cold start control method, device, system, equipment and medium for electrolytic hydrogen production system

Abstract

The present application relates to a cold start control method, device, system, equipment and medium for an electrolytic hydrogen production system. The cold start control method for the electrolytic hydrogen production system includes: controlling a heating device to be turned on to heat an electrolytic cell, the heating device being arranged at the working medium inlet of the electrolytic cell; obtaining the real-time value of the outlet temperature, the set value of the outlet temperature, the protection set value of the outlet temperature and the target cold start duration of the electrolytic cell; wherein, the set value of the outlet temperature is the outlet temperature required to be reached when the cold start of the electrolytic cell ends, and the protection set value of the outlet temperature is the highest temperature allowed to be reached at the outlet during the operation of the electrolytic cell; when the real-time value of the outlet temperature is less than the set value of the outlet temperature, determining the target value of the outlet temperature according to the set value of the outlet temperature, the protection set value of the outlet temperature and the target cold start duration; and outputting the target value of the outlet temperature to the temperature control system of the electrolytic cell, so that the temperature control system adjusts the temperature of the electrolytic cell with the target value of the outlet temperature as the target.

Description

Technical Field

[0001] The present invention relates to the field of hydrogen production by electrolyzing water, and particularly to a cold start control method, device, system, equipment and medium for an electrolytic hydrogen production system. Background Art

[0002] Hydrogen production by electrolyzing water is a method of producing hydrogen by electrolyzing water. It mainly uses a hydrogen production power supply to provide current, and makes the current pass through the water in the electrolytic cell to decompose the water into hydrogen and oxygen.

[0003] The cold start process of an electrolytic water hydrogen production system refers to the process of restarting from a completely stopped state of the system and reaching the normal operating temperature and pressure.

[0004] At present, the temperature of the electrolytic cell is mainly controlled by the temperature control system of the electrolytic cell. The temperature control system performs PID (Proportional-Integral-Derivative Controller) calculation according to the set temperature target value and the actual temperature of the electrolytic cell to calculate the temperature adjustment rate. Then, the temperature control system adjusts the temperature of the electrolytic cell according to the temperature adjustment rate, so that the temperature of the electrolytic cell becomes the temperature target value. The temperature adjustment rate is positively correlated with the difference between the set temperature target value and the actual temperature value.

[0005] However, the inventor found that during the cold start process of the traditional electrolytic water hydrogen production system, the temperature of the electrolytic cell rises slowly, resulting in a long start-up time, and thus affecting the hydrogen production efficiency of the hydrogen production system. Summary of the Invention

[0006] The present application aims to provide a cold start control method, device, system, equipment and medium for an electrolytic hydrogen production system.

[0007] According to one aspect of the present application, a cold start control method for an electrolytic hydrogen production system is proposed. The method may include: controlling a heating device to be turned on to heat the electrolytic cell, where the heating device is arranged at the working medium inlet of the electrolytic cell; obtaining the real-time value of the outlet temperature, the set value of the outlet temperature, the protection set value of the outlet temperature, and the target cold start duration of the electrolytic cell, where the set value of the outlet temperature is the outlet temperature required to be reached when the cold start of the electrolytic cell ends, and the protection set value of the outlet temperature is the highest temperature allowed at the outlet during the operation of the electrolytic cell; when the real-time value of the outlet temperature is less than the set value of the outlet temperature, determining the target value of the outlet temperature according to the set value of the outlet temperature, the protection set value of the outlet temperature, and the target cold start duration; and outputting the target value of the outlet temperature to the temperature control system of the electrolytic cell, so that the temperature control system adjusts the temperature of the electrolytic cell with the target value of the outlet temperature as the target.

[0008] By adopting the above technical solution, on the one hand, a heating device is added at the working medium inlet of the electrolyzer, and the heating device is controlled to be turned on to heat the electrolyzer, which can improve the heating rate of the electrolyzer and shorten the cold start time of the electrolytic hydrogen production system.

[0009] On the other hand, during the cold start of the electrolytic hydrogen production system, based on the outlet temperature set value, the outlet temperature target value is determined through the outlet temperature set value, the outlet temperature protection set value, and the target cold start time, so that the determined outlet temperature target value can be greater than the outlet temperature set value. And the outlet temperature target value is output to the temperature control system of the electrolyzer, which can enable the temperature control system to adjust the temperature of the electrolyzer with the outlet temperature target value as the target. Compared with the temperature control system aiming at the outlet temperature set value, this solution is beneficial to improving the heating rate of the temperature control system, further increasing the temperature rise speed of the electrolyzer, and thus further shortening the cold start time of the electrolytic hydrogen production system.

[0010] According to some embodiments, determining the outlet temperature target value according to the outlet temperature set value, the outlet temperature protection set value, and the target cold start time includes: determining a rate adjustment factor according to the outlet temperature protection set value and the target cold start time. Calculating an outlet temperature offset value based on the rate adjustment factor, the outlet temperature set value, and a preset change coefficient. Calculating the sum of the outlet temperature offset value and the outlet temperature set value to obtain the outlet temperature target value.

[0011] Calculating the outlet temperature offset value based on the rate adjustment factor, the outlet temperature set value, and the preset change coefficient includes: obtaining the power information of the hydrogen production power supply; determining the preset change coefficient according to the power information of the hydrogen production power supply; calculating the outlet temperature offset value based on the rate adjustment factor, the outlet temperature set value, and the preset change coefficient.

[0012] The power information of the hydrogen production power supply includes the set value of the output power of the hydrogen production power supply, the real-time output power of the hydrogen production power supply, and the output power range value of the hydrogen production power supply.

[0013] The preset change coefficient is (P set -P) / P range ;

[0014] The calculation formula for the outlet temperature offset value is: T bias =T set *k*(P set -P) / P range .

[0015] Wherein, T bias is the outlet temperature offset value; T set is the set value of the outlet temperature of the electrolyzer working medium; P set is the set value of the output power of the hydrogen production power supply; P is the real-time output power of the hydrogen production power supply; Prange It is the output power range value of the hydrogen production power supply; k is the rate adjustment factor.

[0016] By adopting the above technical solution, during the process of calculating the target value of the outlet temperature, the rate adjustment factor is determined, and the outlet temperature offset value is calculated through the power information of the hydrogen production power supply. During the cold start process, the real-time output power of the hydrogen production power supply gradually increases and gradually approaches the set value of the output power of the hydrogen production power supply, so that the outlet temperature offset value gradually tends to zero, and further the size of the outlet temperature target value gradually tends to the size of the outlet temperature set value.

[0017] The outlet temperature target value gradually decreases as the cold start process progresses, and at the end of the cold start process, it can smoothly transition to the outlet temperature set value, so that the electrolytic hydrogen production system can reduce the probability of large fluctuations in the electrolyzer temperature, which is beneficial to the rapid stabilization of the electrolyzer temperature and improves the stability of the electrolytic hydrogen production system.

[0018] According to one aspect of the present application, a cold start control device for an electrolytic hydrogen production system is proposed. The device may include: a control module, an information acquisition module, an outlet temperature target determination module, and an outlet temperature target output module.

[0019] The control module is used to control the heating device to start to heat the electrolyzer, and the heating device is arranged at the working medium inlet of the electrolyzer. The information acquisition module is used to acquire the real-time value of the outlet temperature of the electrolyzer, the outlet temperature set value, the outlet temperature protection set value, and the target cold start duration; wherein, the outlet temperature set value is the outlet temperature required to be reached at the end of the cold start of the electrolyzer, and the outlet temperature protection set value is the highest temperature allowed at the outlet during the operation of the electrolyzer. The outlet temperature target determination module is used to determine the outlet temperature target value according to the outlet temperature set value, the outlet temperature protection set value, and the target cold start duration when the real-time value of the outlet temperature is less than the outlet temperature set value. The outlet temperature target output module is used to output the outlet temperature target value to the temperature control system of the electrolyzer, so that the temperature control system adjusts the temperature of the electrolyzer with the outlet temperature target value as the target.

[0020] According to one aspect of the present application, a cold start system for electrolytic hydrogen production is proposed. The system may include: at least one electrolyzer, a hydrogen production power supply, a heating device, and a control device.

[0021] The hydrogen production power supply provides the electric energy required for the electrolytic water reaction for the electrolyzer. The heating device is arranged on the working medium inlet side of the electrolyzer to heat the electrolyzer. The control device executes the above cold start control method for the electrolytic hydrogen production system.

[0022] According to one aspect of the present application, a control device is provided. The control device includes: one or more processors; a storage device for storing one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors implement the method as described above.

[0023] According to one aspect of the present application, a computer-readable medium is provided, on which a computer program is stored, and when the program is executed by a processor, the method as described above is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 It is a schematic diagram of the cold start process of electrolytic hydrogen production in an embodiment of the present application;

[0026] Figure 2 It is a block diagram of the cold start system of electrolytic hydrogen production in an embodiment of the present application;

[0027] Figure 3 It is a schematic flowchart of the cold start control method for the electrolytic hydrogen production system in an embodiment of the present application;

[0028] Figure 4 It is a schematic flowchart of determining the target value of the outlet temperature in step S303 of an embodiment of the present application;

[0029] Figure 5 It is a schematic flowchart of determining the rate adjustment factor in step S3031 of an embodiment of the present application;

[0030] Figure 6 It is a flowchart of the cold start process of the electrolytic water hydrogen production system in an embodiment of the present application;

[0031] Figure 7 It is an example diagram of the relationship curve between the power of the hydrogen production power supply and the outlet temperature of the electrolyzer working medium during the traditional cold start process in the prior art;

[0032] Figure 8 It is an example diagram of the relationship curve between the power of the hydrogen production power supply and the outlet temperature of the electrolyzer working medium in the case of adopting the cold start control method of the electrolytic hydrogen production system in the embodiment of the present application;

[0033] Figure 9 It is a schematic block diagram of the cold start control device of the electrolytic hydrogen production system in an embodiment of the present application;

[0034] Figure 10It is a schematic diagram of the control device in the embodiment of the present application. Detailed implementation manners

[0035] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar parts, and thus their repeated description will be omitted.

[0036] The features, structures, or characteristics described may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of the embodiments of the present disclosure. However, those skilled in the art will realize that the technical solutions of the present disclosure can be practiced without one or more of these specific details, or other means, components, materials, devices, etc. may be used. In these cases, well-known structures, methods, devices, implementations, materials, or operations will not be shown or described in detail.

[0037] In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include steps or units not listed, or other steps or units inherent to these processes, methods, products, or devices.

[0038] The terms "first", "second", etc. in the specification and claims of the present application and the above drawings are used to distinguish different objects, rather than to describe a specific order.

[0039] Next, with reference to the accompanying drawings in the embodiments of the present application, the technical solutions of the present application will be clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0040] Electrolytic hydrogen production is a process of producing hydrogen by electrolyzing water. The specific process of electrolytic water hydrogen production can be referred to Figure 1 , in this process, a direct current is provided by the hydrogen production power supply 3 to electrolyze the water in the electrolytic cell 1, thereby generating hydrogen and oxygen. Oxygen is output from the working medium outlet side of the electrolytic cell 1, and is output to the subsequent process after passing through the oxygen-side separator 4 and the oxygen-side regulating valve 5. After the hydrogen is output from the working medium outlet side of the electrolytic cell 1, it enters the hydrogen storage tank 8 for storage after passing through the hydrogen-side separator 6 and the hydrogen-side regulating valve 7, realizing hydrogen production.

[0041] The hydrogen production efficiency is affected by the temperature of the electrolyzer 1. When the temperature of the electrolyzer 1 is too low, the hydrogen electrolyzed by the water electrolysis hydrogen production system is impure, and even hydrogen may not be electrolyzed. If the temperature of the electrolyzer 1 body is too high, it will damage the internal structural components of the electrolyzer (such as the diaphragm), and even cause the electrolyzer to explode. Therefore, keeping the temperature of the electrolyzer 1 stable at the rated temperature value is a necessary condition for achieving efficient and continuous hydrogen production.

[0042] The cold start process of the water electrolysis hydrogen production system refers to the process in which the equipment restarts and reaches the normal working temperature and pressure after being unoperated or shut down; that is, the process of raising the temperature of the electrolyzer 1 to the rated temperature value.

[0043] The temperature of the electrolyzer 1 is mainly regulated by the temperature control system of the electrolyzer 1. In the traditional cold start process, the temperature control system specifically targets the rated temperature value, performs PID calculation based on the real-time value of the outlet temperature of the electrolyzer 1 and the target, so as to control the temperature of the electrolyzer 1 to gradually reach the target, that is, reach the rated temperature value. For the temperature control system, the heating rate is positively correlated with the target. For example, under the same conditions and sufficient heat source, the higher the target, the faster the heating rate.

[0044] In the early stage of the cold start process, the hydrogen production power setting value of the hydrogen production power supply 3 is usually set relatively low, for example, about 10%. As the cold start process gradually ends, the power setting value of the hydrogen production power supply 3 is set to 100% for continuous and efficient hydrogen production.

[0045] However, the inventors found that in the traditional cold start process, the time taken for the temperature of the electrolyzer 1 to rise to the rated temperature value is relatively long. And due to the long start-up time and the low hydrogen production power of the hydrogen production power supply 3 during this long start-up time, the operating efficiency of the water electrolysis hydrogen production system is relatively low.

[0046] The embodiment of the present application provides a cold start control method for an electrolytic hydrogen production system, and this method is applied to an electrolytic hydrogen production cold start system. Figure 2 FIG. is a block diagram of the electrolytic hydrogen production cold start system, and this electrolytic hydrogen production cold start system includes at least one electrolyzer 1, a hydrogen production power supply 3, a heating device 2, and a control device 9.

[0047] Combined with Figure 1 and Figure 2 , in order to reduce the cold start time and improve the operating efficiency, on the basis of the existing technology, a heating device 2 is added to the working medium inlet side of the electrolyzer 1 to heat the electrolyzer 1.

[0048] The hydrogen production power supply 3 provides the electric energy required for the electrolysis reaction of water for the electrolyzer 1. The control device 9 executes the cold start control method of the electrolytic hydrogen production system to achieve a rapid cold start of the electrolyte hydrogen system.

[0049] It should be noted that the control device 9 can be a programmable logic controller or a distributed control system, which is not limited herein.

[0050] Referring to Figure 3 , the cold start control method of the electrolytic hydrogen production system includes step S301, step S302, step S303, and step S304.

[0051] In step S301, control the heating device to start to heat the electrolytic cell.

[0052] According to the exemplary embodiment, in step S301, the control device controls the heating device to start so that the heating device heats the electrolytic cell, thereby accelerating the heating rate of the electrolytic cell and shortening the heating duration of the electrolytic cell.

[0053] According to the exemplary embodiment, the heating device can be a semiconductor heating device or other devices that can provide heat for the electrolytic cell, which is not limited herein.

[0054] In step S302, obtain the real-time value of the outlet temperature of the electrolytic cell, the set value of the outlet temperature, the protection set value of the outlet temperature, and the target cold start duration.

[0055] According to the exemplary embodiment, the real-time value of the outlet temperature is the real-time temperature value on the working medium outlet side of the electrolytic cell. In step S302, the control device can be measured in real time by setting a temperature sensor on the working medium outlet side of the electrolytic cell.

[0056] According to the exemplary embodiment, the set value of the outlet temperature is the outlet temperature required when the cold start of the electrolytic cell ends, that is, the rated temperature value of the electrolytic cell. Exemplarily, the set value of the outlet temperature is 40 °C.

[0057] According to the exemplary embodiment, the protection set value of the outlet temperature is the highest temperature that the working medium outlet side of the electrolytic cell is allowed to reach during the operation of the electrolytic cell. The protection set value of the outlet temperature can specifically be the temperature for tripping protection during the operation of the electrolytic cell. When the temperature on the working medium outlet side of the electrolytic cell exceeds the protection set value of the outlet temperature, damage to the electrolytic cell may be caused.

[0058] According to the exemplary embodiment, the target cold start duration can be set by the staff according to requirements. Exemplarily, if the staff needs the electrolytic water hydrogen production system to complete cold start within 200 s, the target cold start duration can be set to 200 s.

[0059] In step S303, when the real-time value of the outlet temperature is less than the set value of the outlet temperature, determine the target value of the outlet temperature according to the set value of the outlet temperature, the protection set value of the outlet temperature, and the target cold start duration.

[0060] Step S304: Output the target value of the outlet temperature to the temperature control system of the electrolytic cell, so that the temperature control system adjusts the temperature of the electrolytic cell with the target value of the outlet temperature as the target.

[0061] According to the exemplary embodiment, in step S303, when the real-time value of the outlet temperature is less than the set value of the outlet temperature, the control device determines the target value of the outlet temperature. In step S304, the control device outputs the target value of the outlet temperature to the temperature control system of the electrolytic cell, so that the temperature control system of the electrolytic cell adjusts the temperature of the electrolytic cell with this target value of the outlet temperature as the target.

[0062] According to the exemplary embodiment, when the real-time value of the outlet temperature reaches the set value of the outlet temperature, the cold start process ends. The control device determines that the target value of the outlet temperature is the set value of the outlet temperature, and outputs the target value of the outlet temperature to the temperature control system of the electrolytic cell. This can make the temperature control system of the electrolytic cell target at this set value of the outlet temperature and stabilize the temperature of the electrolytic cell at the set value of the outlet temperature.

[0063] According to the exemplary embodiment, in step S303, the way to determine the target value of the outlet temperature can be to select a value between the set value of the outlet temperature and the protection fixed value of the outlet temperature as the target value of the outlet temperature based on the target cold start duration.

[0064] Exemplarily, in step S303, during the cold start process, when the set value of the outlet temperature is 40°C, the control device selects 50°C as the target value of the outlet temperature. Then in step S304, the control device outputs the target value of the outlet temperature to the temperature control system of the electrolytic cell.

[0065] The temperature control system of the electrolytic cell receives the target value of the outlet temperature output by the control device in step S304 and takes 50°C as the target. Then the temperature control system performs PID calculation based on the real-time value of the outlet temperature and 50°C, calculates the temperature adjustment rate, and adjusts the temperature of the electrolytic cell according to the temperature adjustment rate, so that the temperature of the electrolytic cell begins to rise.

[0066] Compared with the way that the temperature control system takes 40°C as the target, this is equivalent to increasing the gap between the real-time value of the outlet temperature and the target, so that the temperature adjustment rate calculated with 50°C as the target will be higher than the temperature adjustment rate calculated with 40°C as the target, thus enabling the cold start process of the temperature control system to be accelerated.

[0067] During the process of the temperature of the electrolytic cell rising, the set value of the outlet temperature can gradually decrease to 40°C, so that when the temperature of the electrolytic cell rises to 40°C, the cold start process ends, and the control device outputs 40°C to the temperature control system of the electrolytic cell. The temperature control system takes this 40°C as the target and controls the temperature of the electrolytic cell to be stable at about 40°C.

[0068] According to some embodiments, when the real-time value of the outlet temperature is not less than the set value of the outlet temperature, the control device can control the heating device to turn off, or can continue to control the heating device to turn on, which is not limited herein.

[0069] Through the cold start control method of the electrolytic hydrogen production system described above, on the one hand, a heating device is added at the working medium inlet of the electrolytic cell to heat the electrolytic cell, which can improve the heating rate of the electrolytic cell and shorten the cold start duration of the electrolytic hydrogen production system.

[0070] Moreover, the heating device can also provide sufficient heat source to ensure that the temperature control system can heat the electrolytic cell at a target higher than the set value of the outlet temperature.

[0071] On the other hand, during the cold start of the electrolytic hydrogen production system, based on the set value of the outlet temperature, the target value of the outlet temperature is determined through the set value of the outlet temperature, the protection set value of the outlet temperature, and the target cold start duration, so that the determined target value of the outlet temperature can be greater than the set value of the outlet temperature. And output the target value of the outlet temperature to the temperature control system of the electrolytic cell, which can enable the temperature control system to adjust the temperature of the electrolytic cell with the target value of the outlet temperature as the target. Compared with the temperature control system with the set value of the outlet temperature as the target, this solution is beneficial to improving the heating rate of the temperature control system, further increasing the temperature rise speed of the electrolytic cell, and thus further shortening the cold start duration of the electrolytic hydrogen production system.

[0072] According to some embodiments, referring to Figure 4 , Figure 4 is a schematic flow chart for determining the target value of the outlet temperature in step S303 of the embodiment of the present application. This step S303 includes step S3031, step S3032, and step S3033.

[0073] In step S3031, a rate adjustment factor is determined according to the protection set value of the outlet temperature and the target cold start duration.

[0074] In a possible implementation manner, in step S3031, the control device determines the rate adjustment factor specifically as follows: each cold start duration corresponds to a preset rate adjustment factor range, and the control device can determine the rate adjustment factor corresponding to the target cold start duration from the preset rate adjustment factor range corresponding to the target cold start duration.

[0075] In another possible implementation manner, referring to Figure 5 , Figure 5 is a schematic flow chart for determining the rate adjustment factor in step S3031 of the embodiment of the present application. This step S3031 includes step Sa1, step Sa2, step Sa3, step Sa4, step Sa5, and step Sa6.

[0076] In step Sa1, a preliminary value of the rate adjustment factor is determined.

[0077] According to the exemplary embodiment, in step Sa1, the control device determines a preliminary value of the rate adjustment factor. This preliminary value of the rate adjustment factor is a preselected value.

[0078] In a possible implementation, this preliminary value of the rate adjustment factor can be a value randomly selected from a preset value range. Exemplarily, 0.7 is randomly selected from 0 to 1 as the preliminary value of the rate adjustment factor.

[0079] In another possible implementation, the method for determining this preliminary value of the rate adjustment factor may further include: the control device selects a target mode from preset speed modes according to the target cold start duration and the set value of the outlet temperature protection. Then, the control device selects a preliminary value of the rate adjustment factor from the preset rate adjustment factor range corresponding to the target mode.

[0080] According to the exemplary embodiment, the preset speed modes can be specifically divided into at least two preset modes according to the heating rate. Each preset mode corresponds to a preset rate adjustment factor range.

[0081] Exemplarily, the preset speed modes include five preset modes, namely, the ultra-high speed mode, the high speed mode, the medium speed mode, the low speed mode, and the normal mode.

[0082] The preset rate adjustment factor ranges corresponding to the respective preset modes are as follows: ultra-high speed mode - the preset rate adjustment factor range is 0.75 to 1.00; high speed mode - the preset rate adjustment factor range is 0.50 to 0.75; medium speed mode - the preset rate adjustment factor range is 0.25 to 0.50; low speed mode - the preset rate adjustment factor range is 0.01 to 0.25; normal mode - the preset rate adjustment factor range is 0.00.

[0083] According to the exemplary embodiment, the control device selecting a target mode from the preset modes corresponding to the preset speed modes may specifically include: each preset mode corresponds to a cold start duration interval, and the control device determines the cold start duration interval corresponding to the target cold start duration to determine the preset mode corresponding to the target cold start duration.

[0084] According to the exemplary embodiment, after the control device determines the preset mode, it can select a preliminary value of the rate adjustment factor from the preset rate adjustment factor range corresponding to this preset mode. Specifically, this preliminary value of the rate adjustment factor can be a randomly selected value or the intermediate value of this preset rate adjustment factor range, which is not limited herein.

[0085] In step Sa2, predict the predicted maximum temperature and the predicted temperature rise duration of the electrolytic cell when using the preliminary value of the rate adjustment factor.

[0086] According to the exemplary embodiment, the predicted temperature rise duration is the duration required for the temperature of the electrolytic cell to rise to the set value of the outlet temperature.

[0087] According to the exemplary embodiment, the predicted maximum temperature is the maximum temperature that the electrolytic cell may generate during the cold start process.

[0088] According to the exemplary embodiment, in step Sa2, the manner in which the control device predicts the predicted maximum temperature and the predicted temperature rise duration may specifically include: based on the preliminary value of the rate adjustment factor, the control device controls the temperature control system to operate for a preset duration, and feeds back the operation data within the preset duration to the staff, so that the staff can make predictions based on engineering experience to obtain the predicted maximum temperature and the predicted temperature rise duration.

[0089] According to the exemplary embodiment, in step Sa2, the manner in which the control device predicts the predicted maximum temperature and the predicted temperature rise duration may also include: the control device predicts the predicted maximum temperature and the predicted temperature rise duration corresponding to the preliminary value of the rate adjustment factor according to the historical cold start process data. Further, the control device can screen out each process that uses the preliminary value of the rate adjustment factor from the historical cold start process. Then the control device calculates the average value of the historical maximum temperature in each process to obtain the predicted maximum temperature; calculates the average value of the historical temperature rise duration in each process to obtain the predicted temperature rise duration.

[0090] It should be noted that the manner in which the control device predicts the predicted maximum temperature and the predicted temperature rise duration can also be predicted by means of a prediction model and digital simulation, which is not limited herein.

[0091] In step Sa3, determine whether the predicted maximum temperature meets the preset temperature condition.

[0092] According to the exemplary embodiment, the temperature of the electrolytic cell is limited by the protection set value of the outlet temperature.

[0093] During the cold start process, if the value of the rate adjustment factor is too large and the temperature rise rate is relatively high, after the temperature of the electrolytic cell rises to the rated temperature value, the short-term peak value that appears may exceed the protection set value of the outlet temperature.

[0094] Therefore, in step Sa3, the control device determines whether the predicted maximum temperature meets the preset temperature condition to determine whether the temperature of the electrolytic cell exceeds the protection set value of the outlet temperature when using the preliminary value of the rate adjustment factor.

[0095] According to some embodiments, the preset temperature condition may specifically be that the predicted maximum temperature is less than the outlet temperature protection setting value.

[0096] According to some embodiments, the preset temperature condition may further include: T*(1 + Overshoot) < T trip .

[0097] Wherein, T is the predicted maximum temperature; Overshoot is the overshoot of the electrolytic cell working medium outlet temperature control; T trip is the outlet temperature protection setting value.

[0098] According to the exemplary embodiments, the overshoot of the outlet temperature control affects the magnitude of the disturbance to the outlet temperature after the electrolytic cell is disturbed. Due to the influence of the overshoot of the outlet temperature control, when there are minor disturbances in the electrolyzed water hydrogen production system, the cold start system of electrolyzed water hydrogen production, and the temperature control system of the electrolytic cell, the outlet temperature of the electrolytic cell working medium will be disturbed accordingly, and thus the highest outlet temperature of the electrolytic cell may reach the predicted maximum temperature + disturbance temperature.

[0099] Therefore, considering the influence of the overshoot of the outlet temperature control, the preset temperature condition is set so that the control device determines whether the sum of the predicted maximum temperature and the disturbance temperature is less than the temperature protection setting value, which is beneficial for the control device to select an appropriate rate adjustment factor to improve the stability of the electrolytic hydrogen production system.

[0100] According to the exemplary embodiments, Overshoot can be set according to the actual situation. Exemplarily, the Overshoot takes 10% - 20%.

[0101] In step Sa4, it is judged whether the predicted heating-up duration does not exceed the target cold start duration.

[0102] According to the exemplary embodiments, during the cold start process, the smaller the rate adjustment factor, the slower the heating rate and the longer the heating-up duration.

[0103] In step Sa4, after the control device determines the predicted value of the rate adjustment factor, it can judge whether the predicted heating-up duration corresponding to the predicted value of the rate adjustment factor exceeds the target cold start duration, so that in the case where the predicted heating-up duration exceeds the target cold start duration, a larger predicted value of the rate adjustment factor can be selected to increase the heating rate, thereby reducing the heating-up duration and making the heating-up duration meet the requirements of the staff for the cold start duration.

[0104] It should be noted that step Sa3 and step Sa4 can be executed simultaneously, step Sa4 can be executed before step Sa3, or step Sa3 can be executed before step Sa4, which is not limited in the embodiments of the present application.

[0105] In step Sa5, when the predicted maximum temperature does not meet the preset temperature condition, or when the predicted heating-up duration exceeds the target cold start duration, re-determine the initial value of the rate adjustment factor, and re-predict the predicted maximum temperature and the predicted heating-up duration.

[0106] In step Sa6, when the predicted maximum temperature meets the preset temperature condition and the predicted heating-up duration does not exceed the target cold start duration, determine the initial value of the rate adjustment factor as the rate adjustment factor.

[0107] According to the exemplary embodiment, in step Sa6, when the predicted maximum temperature meets the preset temperature condition, the electrolytic cell heats up at the initial value of the rate adjustment factor, which can meet the temperature limit requirements of the electrolytic cell.

[0108] When the predicted heating-up duration does not exceed the target cold start duration, the electrolytic cell heats up at the initial value of the rate adjustment factor, which can meet the staff's requirements for the cold start duration.

[0109] Therefore, in step Sa6, when the predicted maximum temperature meets the preset temperature condition and the predicted heating-up duration does not exceed the target cold start duration, the control device can determine the initial value of the rate adjustment factor as the rate adjustment factor.

[0110] According to the exemplary embodiment, in step Sa5, that the predicted maximum temperature does not meet the preset temperature condition indicates that the initial value of the rate adjustment factor selected by the control device is relatively large. If the control device heats up the electrolytic cell at this initial value of the rate adjustment factor, the outlet temperature of the electrolytic cell may exceed the temperature limit requirements. Therefore, the control device can re-determine the initial value of the rate adjustment factor, and on the basis of the original initial value of the rate adjustment factor, subtract a first preset value to obtain a new initial value of the rate adjustment factor.

[0111] According to the exemplary embodiment, in step Sa5, that the predicted cold start duration exceeds the target cold start duration indicates that the control device selects a relatively small initial value of the rate adjustment factor. If the control device heats up the electrolytic cell at this initial value of the rate adjustment factor, it may lead to a situation where the heating-up duration cannot meet the staff's requirements for the cold start duration. Therefore, the control device can add a second preset value to the original initial value of the rate adjustment factor to obtain a new initial value of the rate adjustment factor.

[0112] According to the exemplary embodiment, in step Sa5, when the predicted maximum temperature does not meet the preset temperature condition, or when the predicted heating-up duration exceeds the target cold start duration, after the control device determines a new predicted value of the rate adjustment factor, if the predicted maximum temperature corresponding to the new predicted value of the rate adjustment factor does not meet the preset temperature condition, or if the predicted heating-up duration exceeds the target cold start duration, the control device can continue to re-determine the new predicted value of the rate adjustment factor and continue to re-calculate the predicted maximum temperature and the predicted heating-up duration.

[0113] Until the predicted maximum temperature corresponding to the new predicted value of the rate adjustment factor meets the preset temperature condition and the predicted heating-up duration does not exceed the target cold start duration.

[0114] Exemplarily, when the predicted value of the rate adjustment factor is set to 0.5, it is determined through steps Sa3 and Sa4 that the predicted maximum temperature does not meet the preset temperature condition and the predicted cold start duration does not exceed the target cold start duration. Therefore, in step Sa5, the control device re-determines the predicted value of the rate adjustment factor, and the new predicted value of the rate adjustment factor is 0.5 - 0.01 = 0.49. And it is determined through steps Sa3 and Sa4 that the predicted maximum temperature corresponding to 0.49 does not meet the preset temperature condition and the predicted cold start duration does not exceed the target cold start duration. Therefore, in step Sa5, the control device continues to re-determine the predicted value of the rate adjustment factor, and the new predicted value of the rate adjustment factor is 0.49 - 0.01 = 0.48. It is determined through steps Sa3 and Sa4 that the predicted maximum temperature corresponding to 0.48 meets the preset temperature condition and the predicted cold start duration does not exceed the target cold start duration. In step Sa6, the control device determines that 0.48 is the rate adjustment factor.

[0115] After determining the rate adjustment factor in step S301, the target value of the outlet temperature can be calculated according to the rate adjustment factor. The calculation of the target value of the outlet temperature can be specifically implemented through steps S3032 and S3033.

[0116] In step S3032, according to the rate adjustment factor, the outlet temperature set value, and the preset change coefficient, calculate the outlet temperature offset value.

[0117] In step S3033, calculate the sum of the outlet temperature offset value and the outlet temperature set value to obtain the target value of the outlet temperature.

[0118] According to the exemplary embodiment, in step S3033, the target value of the outlet temperature = the outlet temperature set value + the outlet temperature offset value. Based on the outlet temperature set value, the control device adds the outlet temperature offset value to obtain the target value of the outlet temperature, so that during the cold start process, the temperature control system can heat up the electrolytic cell with a higher target to increase the temperature rising rate.

[0119] According to the exemplary embodiment, in step S3032, the outlet temperature offset value may specifically be equal to the outlet temperature set value * rate adjustment factor * preset variation coefficient.

[0120] According to the exemplary embodiment, in step S3032, the preset variation coefficient may specifically be a coefficient that gradually decreases as the cold start process progresses; more specifically, it may be a coefficient that decreases stepwise as the cold start process progresses. When the cold start process ends, the preset variation coefficient decreases to 0.

[0121] In step S3032, during the process of the electrolyzer outlet temperature continuously increasing, since the preset variation coefficient gradually decreases, the outlet temperature offset value calculated by the control device gradually decreases, causing the outlet temperature target value to gradually decrease.

[0122] Until the electrolyzer outlet temperature reaches the outlet temperature set value, the preset variation coefficient decreases to 0, the outlet temperature offset value calculated by the control device decreases to 0, and the magnitude of the outlet temperature target value decreases to the outlet temperature set value.

[0123] The control device can make the target of the temperature control system smoothly transition to the magnitude of the outlet temperature set value by setting the preset variation coefficient, reducing the probability of large fluctuations in the outlet temperature when the cold start process ends, which is beneficial to improving the stability of the electrolytic hydrogen production system.

[0124] According to some embodiments, in step S3032, the preset variation coefficient may be a coefficient that decreases a preset threshold value every preset interval duration.

[0125] According to some embodiments, the preset variation coefficient may also be determined based on the power information of the hydrogen production power supply to provide data interaction for the hydrogen-electricity coupling. That is, in step S3032, calculating the outlet temperature offset value according to the rate adjustment factor, the outlet temperature set value, and the preset variation coefficient may include: the control device obtaining the power information of the hydrogen production power supply. The control device determines the preset variation coefficient based on the power information of the hydrogen production power supply, and calculates the outlet temperature offset value based on the rate adjustment factor, the outlet temperature set value, and the preset variation coefficient.

[0126] According to the exemplary embodiment, the control device may determine the preset variation coefficient based on the power information of the hydrogen production power supply, and then calculate the product of the rate adjustment factor, the preset variation coefficient, and the outlet temperature set value to calculate the outlet temperature offset value.

[0127] According to some embodiments, the power information of the hydrogen production power supply may include the hydrogen production power supply output power set value, the hydrogen production power supply real-time output power, and the hydrogen production power supply output power range value.

[0128] The set value of the output power of the hydrogen production power supply is the output power of the hydrogen production power supply set by the staff during the cold start process. Exemplarily, the set value of the output power of the hydrogen production power supply is the output power when the hydrogen production power supply continuously produces hydrogen, that is, 100% of the output power of the hydrogen production power supply, for example, 135 kW.

[0129] The real-time output power of the hydrogen production power supply is the real-time output power of the hydrogen production power supply. As the cold start process progresses, the output power of the hydrogen production power supply also continuously increases until, at the end of the cold start, the output power of the hydrogen production power supply reaches the set value of the output power of the hydrogen production power supply, that is, reaches 100% of the output power of the hydrogen production power supply.

[0130] The output power range value of the hydrogen production power supply refers to the range of the electric power that the hydrogen production power supply device can provide or process. Specifically, the output power range value of the hydrogen production power supply can be the difference between the maximum power and the minimum power that the hydrogen production power supply can provide, or can also be the maximum power that the hydrogen production power supply can provide, which is not limited in the embodiments of the present application.

[0131] According to some embodiments, the control device determines a preset change coefficient according to the power information of the hydrogen production power supply, which may specifically include: the control device calculates the difference between the set value of the output power of the hydrogen production power supply and the real-time output power of the hydrogen production power supply, and then divides the difference by a preset power reference value to obtain the preset change coefficient.

[0132] According to some embodiments, after the control device calculates the difference between the set value of the output power of the hydrogen production power supply and the real-time output power of the hydrogen production power supply, the preset change coefficient can also be obtained by dividing the difference by the output power range value of the hydrogen production power supply.

[0133] That is, the preset change coefficient can be (P set -P) / P range , so the calculation formula for the outlet temperature offset value can be: T bias =T set *k*(P set -P) / P range .

[0134] Among them, T bias is the outlet temperature offset value; T set is the set value of the electrolyte working medium outlet temperature; P set is the set value of the output power of the hydrogen production power supply; P is the real-time output power of the hydrogen production power supply; P range is the output power range value of the hydrogen production power supply; k is the rate adjustment factor.

[0135] During the cold start process, the real-time output power of the hydrogen production power supply continuously increases, making the preset change coefficient smaller until, at the end of the cold start, the real-time output power of the hydrogen production power supply reaches the set value of the output power of the hydrogen production power supply, the preset change coefficient becomes 0, and the outlet temperature offset value becomes 0.

[0136] Based on the above embodiments, an example is provided in an embodiment of the present application to illustrate the cold start process of the electrolytic hydrogen production system. Referring to Figure 6 , the cold start process of the electrolytic hydrogen production system includes step S61, step S62, step S63, step S64, step S65, step S66, step S67, step S68, and step S69.

[0137] The cold start process begins. In step S61, the control device controls the heating device to start to heat the electrolytic cell, and in step S62, the hydrogen production power supply outputs an initial power.

[0138] After that, during the cold start process, in step S63, the control device selects a preset mode and determines a rate adjustment factor pre-value according to the target cold start duration and the outlet temperature protection set value.

[0139] After that, in step S64, the control device determines whether the rate adjustment factor pre-value meets the requirements of the outlet temperature protection set value and the target cold start duration.

[0140] When the rate adjustment factor pre-value does not meet the requirements, steps S63 are repeatedly executed so that the control device re-determines the rate adjustment factor pre-value, and steps S64 are repeatedly executed so that the control device re-determines whether the new rate adjustment factor pre-value meets the requirements, and the loop continues. Until in step S64, the control device determines that the rate adjustment factor pre-value meets the requirements of the outlet temperature protection set value and the target cold start duration, and uses this rate adjustment factor pre-value as the rate adjustment factor.

[0141] After that, in step S65, the control device calculates the outlet temperature offset value based on the rate adjustment factor and the power information of the hydrogen production power supply.

[0142] After that, in step S66, the control device controls the working medium outlet temperature of the electrolytic cell. Specifically, the control device calculates the outlet temperature target value based on the outlet temperature offset value and the outlet temperature set value, so that the temperature control system of the electrolytic cell adjusts the temperature of the electrolytic cell according to the outlet temperature target value until the real-time value of the outlet temperature of the electrolytic cell reaches the outlet temperature set value, that is, reaches the rated temperature value.

[0143] During the process of the control device controlling the outlet temperature of the electrolytic cell, through step S67, the control device determines whether the outlet temperature of the electrolytic cell is qualified, that is, the control device determines whether the outlet temperature of the electrolytic cell reaches the outlet temperature set value.

[0144] Before the real-time value of the outlet temperature of the electrolytic cell reaches the outlet temperature set value, step S66 is cyclically executed to continue controlling the outlet temperature of the electrolytic cell. During this process, the real-time output power of the hydrogen production power supply also continuously increases, the outlet temperature offset value continuously decreases, and the outlet temperature target value also decreases accordingly.

[0145] When the real-time value of the outlet temperature of the electrolytic cell reaches the outlet temperature set value, the cold start process ends and transfers to steps S68 and S69. In step S68, the control device raises the real-time output power of the hydrogen production power supply to the hydrogen production power supply output power set value, that is, raises it to 100%, and starts continuous hydrogen production. In step S69, the control device turns off the heating device, and thus ends the cold start process.

[0146] Refer to Figure 7 and Figure 8 , Figure 7 is an example diagram of the relationship curve between the power of the hydrogen production power supply and the outlet temperature of the working medium of the electrolytic cell during the traditional cold start process. Figure 8 is an example diagram of the relationship curve between the power of the hydrogen production power supply and the outlet temperature of the working medium of the electrolytic cell under the cold start control method of the electrolytic hydrogen production system adopting the present application.

[0147] In Figure 7 and Figure 8 example, the hydrogen production power supply output power set value is 145 kW, the real-time output power of the hydrogen production power supply at the initial stage of the cold start of the electrolytic cell is 0 kW, the real-time value of the outlet temperature of the electrolytic cell is 7.5 °C, the outlet temperature set value of the electrolytic cell is 40 °C, and the outlet temperature protection fixed value is taken as 60 °C. Figure 8 In the example, the rate adjustment factor is taken as 0.2 and the overshoot is taken as 10%.

[0148] During the traditional cold start process, the temperature of the electrolytic cell body is relatively low in the early stage of the cold start process, the hydrogen production power supply output power set value is 10 kW, and then the real-time output power of the hydrogen production power supply rises from 0 to 10 kW.

[0149] As the cold start process progresses, the hydrogen production power supply output power set value gradually increases step by step to 145 kW, and the real-time output power of the hydrogen production power supply also continuously rises until it rises to the output power set value of 145 kW. Correspondingly, during the cold start process, the temperature of the electrolytic cell slowly rises from 7.5 °C until it stabilizes at 40 °C, and the cold start duration consumed in this process reaches 600 s.

[0150] By adopting the cold start control method of the electrolytic hydrogen production system according to the embodiment of the present application, since the heating device is started in the early stage of cold start, the rising speed of the working medium outlet temperature of the electrolytic cell is faster than that of Figure 7 . And by setting a higher outlet temperature target value for the temperature control system to increase the heating rate of the electrolytic cell, the cold start process can be completed in only 200 s, greatly shortening the cold start duration.

[0151] Moreover, with the development of the cold start process, the difference between the real-time output power of the hydrogen production power supply and the set value of the hydrogen production power supply output gradually decreases to 0, and the outlet temperature target value continuously decreases to the outlet temperature set value, so that the magnitude of the outlet temperature target value can smoothly transition to 40 °C, reducing the probability of large fluctuations in the outlet temperature when the cold start process ends.

[0152] It should be clearly understood that the present application describes how to form and use specific examples, but the present application is not limited to any details of these examples. On the contrary, based on the teachings of the content disclosed in the present application, these principles can be applied to many other embodiments.

[0153] Those skilled in the art can understand that all or part of the steps of implementing the above embodiments are implemented as a computer program executed by a CPU. When the computer program is executed by the CPU, the above functions defined by the above method provided by the present application are executed.

[0154] The above embodiment introduces a method for controlling the cold start of an electrolytic hydrogen production system from the perspective of the method flow. The following embodiment introduces a device for controlling the cold start of an electrolytic hydrogen production system from the perspective of virtual modules or virtual units. For details, see the following embodiment.

[0155] The device embodiment of the present application described below can be used to execute the method embodiment of the present application. For details not disclosed in the device embodiment of the present application, reference can be made to the method embodiment of the present application.

[0156] As Figure 9 shown, the cold start control device of the electrolytic hydrogen production system may include: a control module 901, an information acquisition module 902, an outlet temperature target determination module, and an outlet temperature target output module 903.

[0157] The control module 901 is used to control the heating device to start to heat the electrolytic cell, and the heating device is arranged at the working medium inlet of the electrolytic cell.

[0158] The information acquisition module 902 is used to acquire the real-time value of the outlet temperature of the electrolytic cell, the outlet temperature set value, the outlet temperature protection set value, and the target cold start duration; wherein, the outlet temperature set value is the outlet temperature required to reach at the end of the cold start of the electrolytic cell, and the outlet temperature protection set value is the highest temperature that the outlet is allowed to reach during the operation of the electrolytic cell.

[0159] The outlet temperature target determination module 903 is configured to determine the outlet temperature target value according to the outlet temperature set value, the outlet temperature protection set value, and the target cold start duration when the real-time value of the outlet temperature is less than the outlet temperature set value.

[0160] The outlet temperature target output module 904 is configured to output the outlet temperature target value to the temperature control system of the electrolyzer, so that the temperature control system adjusts the temperature of the electrolyzer with the outlet temperature target value as the target.

[0161] According to some embodiments, when the outlet temperature target determination module 903 determines the outlet temperature target value according to the outlet temperature set value, the outlet temperature protection set value, and the target cold start duration, it is specifically configured to: determine a rate adjustment factor according to the outlet temperature protection set value and the target cold start duration; calculate an outlet temperature offset value according to the rate adjustment factor, the outlet temperature set value, and a preset change coefficient; calculate the sum of the outlet temperature offset value and the outlet temperature set value to obtain the outlet temperature target value.

[0162] According to some embodiments, when the outlet temperature target determination module 903 calculates the outlet temperature offset value according to the rate adjustment factor, the outlet temperature set value, and the preset change coefficient, it is specifically configured to: obtain the power information of the hydrogen production power supply; determine the preset change coefficient according to the power information of the hydrogen production power supply; calculate the outlet temperature offset value based on the rate adjustment factor, the outlet temperature set value, and the preset change coefficient.

[0163] According to some embodiments, the power information of the hydrogen production power supply includes the set value of the output power of the hydrogen production power supply, the real-time output power of the hydrogen production power supply, and the output power range value of the hydrogen production power supply; the calculation formula for the preset change coefficient is: (P set -P) / P range .

[0164] The calculation formula for the outlet temperature offset value is: T bias =T set *k*(P set -P) / P range .

[0165] Wherein, T bias is the outlet temperature offset value; T set is the set value of the outlet temperature of the electrolyzer working medium; P set is the set value of the output power of the hydrogen production power supply; P is the real-time output power of the hydrogen production power supply; P range is the output power range value of the hydrogen production power supply; k is the rate adjustment factor.

[0166] According to some embodiments, when determining the rate adjustment factor based on the outlet temperature protection setting value and the target cold start duration, the outlet temperature target determination module 903 is specifically configured to: determine a pre-value of the rate adjustment factor; predict the predicted maximum temperature and the predicted temperature rise duration of the electrolytic cell when the pre-value of the rate adjustment factor is adopted, where the predicted temperature rise duration is the duration required for the temperature of the electrolytic cell to rise to the outlet temperature setting value; determine whether the predicted maximum temperature meets the preset temperature condition; determine whether the predicted temperature rise duration exceeds the target cold start duration; when the predicted maximum temperature does not meet the preset temperature condition, or when the predicted temperature rise duration exceeds the target cold start duration, re-determine the pre-value of the rate adjustment factor, and re-predict the predicted maximum temperature and the predicted temperature rise duration; when the predicted maximum temperature meets the preset temperature condition and the predicted temperature rise duration does not exceed the target cold start duration, determine the pre-value of the rate adjustment factor as the rate adjustment factor.

[0167] According to some embodiments, when determining the pre-value of the rate adjustment factor, the outlet temperature target determination module 903 is specifically configured to: select a target mode from the preset speed modes according to the target cold start duration and the outlet temperature protection setting value; select the pre-value of the rate adjustment factor from the preset rate adjustment factor range corresponding to the target mode.

[0168] According to some embodiments, the preset temperature condition includes: T*(1 + Overshoot) < T trip ;

[0169] where T is the predicted maximum temperature; Overshoot is the overshoot of the electrolytic cell working medium outlet temperature control; T trip is the outlet temperature protection setting value.

[0170] The device performs functions similar to the method provided above. For other functions, refer to the previous description and will not be elaborated here.

[0171] The embodiments of the present application also introduce an electrolytic hydrogen production cold start system. Refer to Figure 2 , including: at least one electrolytic cell 1, a hydrogen production power supply 3, a heating device 2, and a control device 9.

[0172] The hydrogen production power supply 3 provides electrical energy required for the electrolytic water reaction for the electrolytic cell 2; the heating device 2 is arranged on the working medium inlet side of the electrolytic cell 1 to heat the electrolytic cell 1; the control device 9 executes the above-mentioned cold start control method of the electrolytic hydrogen production system.

[0173] The embodiments of the present application also introduce a control device from the perspective of an entity device. Refer to Figure 10 , Figure 10The control device 9 shown includes: a processor 1001 and a memory 1003. Among them, the processor 1001 and the memory 1003 are connected, such as connected through a bus 1002. Optionally, the control device 9 may further include a transceiver 1004. It should be noted that in practical applications, the transceiver 1004 is not limited to one, and the structure of the control device 9 does not constitute a limitation to the embodiments of the present application.

[0174] The processor 1001 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logic blocks, modules, and circuits described in connection with the disclosure of the present application. The processor 1001 may also be a combination that implements computing functions, such as a combination including one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0175] The bus 1002 may include a path for transmitting information between the above components. The bus 1002 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. The bus 1002 may be divided into an address bus, a data bus, a control bus, etc. For the sake of representation, Figure 10 only a thick line is used to represent it in the figure, but it does not mean that there is only one bus or one type of bus.

[0176] The memory 1003 can be a ROM (Read Only Memory), or other types of static storage devices that can store static information and instructions, a RAM (Random Access Memory), or other types of dynamic storage devices that can store information and instructions. It can also be an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory), or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media, or other magnetic storage devices, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0177] The memory 1003 is used to store the application program code for implementing the solution of this application and is controlled by the processor 1001 to execute. The processor 1001 is used to execute the application program code stored in the memory 1003 to implement the content shown in the foregoing method embodiments.

[0178] The embodiments of this application provide a computer-readable storage medium with a computer program stored thereon. When it runs on a computer, it enables the computer to execute the corresponding content in the foregoing method embodiments. The storage medium can be a read-only memory, a magnetic disk, an optical disc, etc. In the embodiments of this application, on the one hand, a heating device is added at the working medium inlet of the electrolytic cell, and the heating device is controlled to turn on to heat the electrolytic cell, which can improve the heating rate of the electrolytic cell and shorten the cold start duration of the electrolytic hydrogen production system.

[0179] On the other hand, during the cold start of the electrolytic hydrogen production system, by determining the target value of the outlet temperature and outputting the target value of the outlet temperature to the temperature control system of the electrolytic cell, the temperature control system can adjust the temperature of the electrolytic cell with the target value of the outlet temperature as the target. Compared with the temperature control system targeting the outlet temperature set value, this solution is beneficial to improving the heating rate of the temperature control system, further increasing the temperature increase speed of the electrolytic cell, and thus further shortening the cold start duration of the electrolytic hydrogen production system.

[0180] Finally, it should be noted that the above are only the preferred embodiments of the present application and are not used to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions of the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A cold start control method for an electrolytic hydrogen production system, characterized in that, Including: Controlling the heating device to turn on for heating the electrolytic cell, where the heating device is arranged at the working medium inlet of the electrolytic cell; Obtaining the real-time value of the outlet temperature, the set value of the outlet temperature, the protection set value of the outlet temperature, and the target cold start duration of the electrolytic cell; wherein, the set value of the outlet temperature is the outlet temperature required to be reached when the cold start of the electrolytic cell ends, and the protection set value of the outlet temperature is the highest temperature allowed at the outlet during the operation of the electrolytic cell; When the real-time value of the outlet temperature is less than the set value of the outlet temperature, determining the target value of the outlet temperature according to the set value of the outlet temperature, the protection set value of the outlet temperature, and the target cold start duration, including: Determining a rate adjustment factor according to the protection set value of the outlet temperature and the target cold start duration; Calculating an outlet temperature offset value according to the rate adjustment factor, the set value of the outlet temperature, and a preset change coefficient; Calculating the sum of the outlet temperature offset value and the set value of the outlet temperature to obtain the target value of the outlet temperature, where the target value of the outlet temperature is greater than the set value of the outlet temperature; Outputting the target value of the outlet temperature to the temperature control system of the electrolytic cell, so that the temperature control system adjusts the temperature of the electrolytic cell with the target value of the outlet temperature as the target.

2. The method according to claim 1, wherein The calculating the outlet temperature offset value according to the rate adjustment factor, the set value of the outlet temperature, and a preset change coefficient includes: Obtaining the power information of the hydrogen production power supply; Determining the preset change coefficient according to the power information of the hydrogen production power supply; Calculating the outlet temperature offset value based on the rate adjustment factor, the set value of the outlet temperature, and the preset change coefficient.

3. The method according to claim 2, wherein The power information of the hydrogen production power supply includes the set value of the output power of the hydrogen production power supply, the real-time output power of the hydrogen production power supply, and the output power range value of the hydrogen production power supply; The calculation formula of the preset change coefficient is (P set -P) / P range ; The calculation formula for the outlet temperature offset value is T bias = T set * k * (P set - P) / P range ; Among them, T bias is the outlet temperature offset value; T set is the set value of the electrolyte working medium outlet temperature; P set is the set value of the hydrogen production power supply output power; P is the actual output power of the hydrogen production power supply; P range is the range value of the hydrogen production power supply output power; k is the rate adjustment factor.

4. The method according to claim 1, wherein The determining the rate adjustment factor according to the protection set value of the outlet temperature and the target cold start duration includes: Determining a pre-value of the rate adjustment factor; Predicting the predicted highest temperature and the predicted temperature rise duration of the electrolytic cell when the pre-value of the rate adjustment factor is adopted, where the predicted temperature rise duration is the duration required for the temperature of the electrolytic cell to rise to the set value of the outlet temperature; Judging whether the predicted highest temperature meets a preset temperature condition; Judging whether the predicted temperature rise duration exceeds the target cold start duration; When the predicted highest temperature does not meet the preset temperature condition, or the predicted temperature rise duration exceeds the target cold start duration, re-determining the pre-value of the rate adjustment factor, and re-predicting the predicted highest temperature and the predicted temperature rise duration; When the predicted highest temperature meets the preset temperature condition and the predicted temperature rise duration does not exceed the target cold start duration, determining the pre-value of the rate adjustment factor as the rate adjustment factor.

5. The method according to claim 4, characterized in that, The determining the pre-value of the rate adjustment factor includes: Selecting a target mode from preset speed modes according to the target cold start duration and the protection set value of the outlet temperature; Select the preset rate adjustment factor threshold value from the range of preset rate adjustment factors corresponding to the target mode.

6. The method according to claim 4, wherein The preset temperature condition includes: T*(1 + Overshoot) < T trip ; Among them, T is the predicted maximum temperature; Overshoot is the overshoot of the electrolyzer working medium outlet temperature control; T trip is the set value for the outlet temperature protection.

7. An electrolytic hydrogen production system cold start control device, characterized in that, It includes: A control module for controlling the heating device to start heating the electrolytic cell, and the heating device is arranged at the working medium inlet of the electrolytic cell; An information acquisition module for acquiring the real-time value of the outlet temperature of the electrolytic cell, the set value of the outlet temperature, the protection set value of the outlet temperature, and the target cold start duration; wherein, the set value of the outlet temperature is the outlet temperature required to be reached when the cold start of the electrolytic cell ends, and the protection set value of the outlet temperature is the highest temperature that the outlet of the electrolytic cell is allowed to reach during operation; An outlet temperature target determination module for determining the outlet temperature target value according to the set value of the outlet temperature, the protection set value of the outlet temperature, and the target cold start duration when the real-time value of the outlet temperature is less than the set value of the outlet temperature, including: The outlet temperature target determination module determines the rate adjustment factor according to the protection set value of the outlet temperature and the target cold start duration; The outlet temperature target determination module calculates the outlet temperature offset value according to the rate adjustment factor, the set value of the outlet temperature, and a preset change coefficient; The outlet temperature target determination module calculates the sum of the outlet temperature offset value and the set value of the outlet temperature to obtain the outlet temperature target value, wherein the outlet temperature target value is greater than the set value of the outlet temperature; An outlet temperature target output module for outputting the outlet temperature target value to the temperature control system of the electrolytic cell, so that the temperature control system adjusts the temperature of the electrolytic cell with the outlet temperature target value as the target.

8. An electrolytic hydrogen production cold start system, characterized in that, It includes: At least one electrolytic cell; A hydrogen production power supply for providing electric energy required for the electrolytic water reaction for the electrolytic cell; A heating device arranged on the working medium inlet side of the electrolytic cell to heat the electrolytic cell; A control device for executing the method according to any one of claims 1-6 above.

9. A control device, characterized in that, It includes: One or more processors; A storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method according to any one of claims 1-6.

10. A computer-readable medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method according to any one of claims 1-6.

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