A water electrolysis hydrogen production device control system

Abstract

The application relates to the field of electrolytic production of hydrogen, and provides a water electrolysis hydrogen production device control system, the method comprising: the water electrolysis hydrogen production device comprising: an electrolytic tank for electrolytic production of hydrogen, a rectifying component for providing current to the electrolytic tank, a circulating liquid path for inputting and outputting electrolyte to the electrolytic tank, a hydrogen separator for separating hydrogen and electrolyte, and an oxygen separator for separating oxygen and electrolyte; the electrolytic tank comprising a plurality of electrolytic cells; the water electrolysis hydrogen production device control system comprising a processor, the processor being used for acquiring a performance index of the water electrolysis hydrogen production device, adjusting control parameters of each electrolytic cell according to the performance index, and determining an abnormal electrolytic cell; wherein the performance index at least comprises a temperature index and a pressure index, the temperature index being the temperature of the circulating liquid path, and the pressure index being the pressure of the electrolytic tank.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electrolytic production of hydrogen, in particular to a water electrolysis hydrogen production device control system. BACKGROUND

[0002] In order to improve the conductivity of the electrolyte and thus improve the efficiency of electrolytic hydrogen production, the water electrolysis hydrogen production device in the industrial scene usually uses alkali solution as the electrolyte. Although the alkali solution is corrosive and can cause corrosion to various components of the water electrolysis hydrogen production device, the maintenance cost caused by corrosion is much smaller than the benefit brought by improving the hydrogen production efficiency. Therefore, it is often necessary to detect each component of the water electrolysis hydrogen production device through a sensor to determine whether it needs to be replaced. However, the electrolytic cell is usually composed of multiple electrolytic chambers, and a sensor is arranged in each electrolytic chamber, which greatly increases the hardware cost. How to reduce the hardware cost of fault maintenance through intelligent control of the water electrolysis hydrogen production device has become a problem to be solved. SUMMARY

[0003] The main purpose of the present application is to provide a water electrolysis hydrogen production device control system, which aims to identify the abnormal electrolytic chamber in the electrolytic cell and realize automatic detection of the fault of the water electrolysis hydrogen production device.

[0004] The present application provides a water electrolysis hydrogen production device control system, the water electrolysis hydrogen production device comprising: an electrolytic cell for electrolytic production of hydrogen, a rectifying component for providing current to the electrolytic cell, a circulating liquid path for inputting and outputting electrolyte to the electrolytic cell, a hydrogen separator for separating hydrogen and electrolyte, and an oxygen separator for separating oxygen and electrolyte; the electrolytic cell comprises a plurality of electrolytic chambers;

[0005] The water electrolysis hydrogen production device control system comprises a processor, the processor is used for acquiring performance indicators of the water electrolysis hydrogen production device, and adjusting control parameters of each electrolytic chamber according to the performance indicators to determine the abnormal electrolytic chamber; wherein the performance indicators at least include: temperature indicators, pressure indicators, the temperature indicators are the temperature of the circulating liquid path, and the pressure indicators are the pressure of the electrolytic cell.

[0006] In some embodiments, the processor is used for:

[0007] acquiring abnormal signals corresponding to the performance indicators, and adjusting the control parameters of each electrolytic chamber in response to the abnormal signals, and determining the fault electrolytic chamber according to the feedback information of each electrolytic chamber.

[0008] In some embodiments, the processor is configured to:

[0009] In a case where the temperature index and the pressure index are in an alarm range, a first abnormal signal is sent, the first abnormal signal being used to control the water electrolysis hydrogen production device to perform an interlock shutdown operation;

[0010] In a case where the temperature index and the pressure index are in a pre-warning range, a second abnormal signal is sent, the second abnormal signal being used to instruct the water electrolysis hydrogen production device to adjust the control parameter of each electrolysis cell.

[0011] In some embodiments, the pre-warning range is surrounded by the alarm range.

[0012] In some embodiments, the interlock shutdown operation comprises at least one of:

[0013] In a case where the pressure index is greater than a preset pressure, the rectifier component is controlled to stop supplying power to the electrolysis tank;

[0014] In a case where the temperature index is greater than a preset temperature, the rectifier component is controlled to stop supplying power to the electrolysis tank and increase the flow rate of the circulating liquid in the circulating liquid circuit;

[0015] In a case where the liquid level of any one of the hydrogen separator or the oxygen separator is less than a lower limit of the liquid level, the rectifier component is controlled to stop supplying power to the electrolysis tank;

[0016] In a case where the amount of circulating alkali in the circulating liquid circuit is less than a preset flow rate, the flow rate of the alkali liquid in the circulating liquid circuit is increased.

[0017] In some embodiments, the rectifier component is connected with a transformer, and the transformer is provided with a thermal overload relay and an air switch.

[0018] In some embodiments, the adjusting of the control parameter of each electrolysis cell according to the performance index comprises:

[0019] At a first time, a first adjustment operation is performed on the control parameter of at least one candidate electrolysis cell, the first adjustment operation being used to reduce the control parameter to reduce the hydrogen production of the candidate electrolysis cell;

[0020] Between the first time and a second time, the performance index is detected, and in a case where the performance index satisfies a first preset condition, a second adjustment operation is performed on the control parameter of the candidate electrolysis cell, the second adjustment operation being used to reduce the control parameter to reduce the hydrogen production of the candidate electrolysis cell.

[0021] After the second time, the performance index is detected, and in a case where the performance index meets a second preset condition, a fault electrolysis chamber is determined according to the candidate electrolysis chamber.

[0022] The first adjustment operation and the second adjustment operation are different in adjustment amount of the control parameter.

[0023] In some embodiments, the control parameter includes a current density, and the second adjustment operation performed on the control parameter of the candidate electrolysis chamber in a case where the performance index meets a first preset condition includes:

[0024] In a case where the change value of the temperature index is greater than ΔT and the change value of the pressure index is greater than ΔP, it is determined that the performance index meets the first preset condition, wherein ΔT and ΔP are determined according to the following formula:

[0025] ;

[0026] represents a transfer matrix of the i th candidate electrolysis chamber, α represents a temperature basic response coefficient, and β represents a pressure basic response coefficient, represents a system compensation constant, represents a change amount of the current density of the i th candidate electrolysis chamber.

[0027] In some embodiments, the temperature basic response coefficient α and the pressure basic response coefficient β are determined according to the following formula:

[0028] ;

[0029] ;

[0030] wherein, represents the ohmic efficiency, represents the electrolysis chamber resistance, represents the chemical reaction heat, ρ represents the circulating liquid density, c represents the circulating liquid specific heat capacity, and V represents the circulating liquid volume;

[0031] γ represents a gas molar generation rate coefficient, represents the gas phase volume, δ represents a flow channel design coefficient, μ represents the electrolyte viscosity, and v represents the electrolyte flow rate, represents the number of moles of gas generated per unit time.

[0032] In some embodiments, and are determined according to the following formula:

[0033] ;

[0034] ;

[0035] wherein, λ represents a thermal conduction attenuation coefficient, represents a distance from a circulating liquid inlet of the i-th candidate electrolysis chamber to a circulating liquid path, represents a distance attenuation coefficient, when the candidate electrolysis chamber is closer to the circulating liquid inlet , when the candidate electrolysis chamber is closer to the circulating liquid outlet ;

[0036] represents a permeability of the porous transport layer, represents an effective area of the candidate electrolysis chamber.

[0037] The application provides a water electrolysis hydrogen production device control system, the water electrolyysis hydrogen production device comprising: an electrolysis tank for electrolysis to produce hydrogen, a rectifying component for providing current to the electrolysis tank, a circulating liquid path for inputting and outputting electrolyte to the electrolysis tank, a hydrogen separator for separating hydrogen and electrolyte, and an oxygen separator for separating oxygen and electrolyte; the electrolysis tank comprises a plurality of electrolysis chambers; the water electrolysis hydrogen production device control system comprises a processor, the processor is used to obtain a performance index of the water electrolysis hydrogen production device, and adjust the control parameter of each electrolysis chamber according to the performance index, and determine the electrolysis chamber with abnormality; wherein the performance index at least comprises: a temperature index and a pressure index, the temperature index is the temperature of the circulating liquid path, and the pressure index is the pressure of the electrolysis tank. Since the control parameter of each electrolysis chamber is adjusted respectively in the case that the performance index has a slight abnormality, if the abnormality of the performance index can be improved by reducing the control parameter of the electrolysis chamber, it indicates that the reason for the abnormality is in the electrolysis chamber; the electrolysis chamber with abnormality is determined from the plurality of electrolysis chambers of the electrolysis tank, and the hardware cost caused by setting the sensor in each electrolysis chamber is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0039] Figure 1 The structural schematic block diagram of a water electrolysis hydrogen production device control system provided by an embodiment of the application is shown in the figure.

[0040] Figure 2 The structural schematic block diagram of a computer device related to an embodiment of the application is shown in the figure. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application.

[0042] The flowchart shown in the drawings is only an example and does not necessarily include all the contents and operations / steps, nor does it have to be executed in the order described. For example, some operations / steps can be further decomposed, combined or partially merged, so that the actual execution order can be changed according to the actual situation.

[0043] The embodiments of the present application provide a water electrolysis hydrogen production device control system.

[0044] Some embodiments of the present application will be described in detail below with reference to the drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0045] Please refer to Figure 1 , Figure 1 A structural schematic block diagram of a water electrolysis hydrogen production device control system provided by an embodiment of the present application is shown. The water electrolysis hydrogen production device control system can be used in a terminal or a server, where the terminal can be an electronic device such as a mobile phone, a tablet computer, a notebook computer, a desktop computer, a personal digital assistant and a wearable device; the server can be a stand-alone server, a server cluster, a cloud server providing cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, content delivery networks (CDNs), and basic cloud computing services such as big data and artificial intelligence platforms.

[0046] As shown in Figure 1 , the water electrolysis hydrogen production device includes an electrolytic cell for electrolysis to produce hydrogen, a rectifying component for providing current to the electrolytic cell, a circulating liquid path for inputting and outputting electrolyte to the electrolytic cell, a hydrogen separator for separating hydrogen from the electrolyte, and an oxygen separator for separating oxygen from the electrolyte; the electrolytic cell includes a plurality of electrolytic cells;

[0047] The water electrolysis hydrogen production device control system comprises a processor configured to obtain performance indicators of the water electrolysis hydrogen production device, and adjust control parameters of each electrolysis cell according to the performance indicators to determine an electrolysis cell with an abnormality; wherein the performance indicators at least include a temperature indicator and a pressure indicator, the temperature indicator is a temperature of a circulating liquid circuit, and the pressure indicator is a pressure of an electrolysis tank.

[0048] For example, the electrolysis tank is a core device for alkaline water electrolysis hydrogen production, and generally comprises a plurality of electrolysis cells, each of which is composed of an anode, a cathode, a diaphragm and a shell. Under the action of direct current, water molecules undergo oxidation reaction at the anode to generate oxygen, and undergo reduction reaction at the cathode to generate hydrogen. The performance of the electrolysis cell directly affects the hydrogen production efficiency and cost. The diaphragm is located between the electrodes and serves to separate hydrogen and oxygen, while allowing ions to pass through. Generally, a high-performance composite diaphragm is used, and the tank body needs to have excellent sealing performance and sufficient mechanical strength to work stably under normal pressure or slightly positive pressure. The electrodes, diaphragm and shell may be corroded by the alkaline solution, leading to aging, so it is necessary to maintain the components of each electrolysis cell, such as detecting the service life of the electrolysis cell components, and replacing the components in case of damage.

[0049] For example, the rectifier component is part of the power supply system, which is responsible for converting alternating current into direct current required by the electrolysis tank to ensure continuous and stable output of voltage and current. According to Faraday's law, the production of product gas of the water electrolysis hydrogen production device is proportional to the electrolysis current of the cell, and the greater the current, the greater the hydrogen production.

[0050] For example, the function of the circulating liquid circuit is to ensure uniform distribution of the electrolyte in the electrolysis tank, prevent local overheating and improve electrolysis efficiency. It carries away hydrogen, oxygen and heat generated during the electrolysis process from the electrolysis tank, supplies the raw material water to the electrolysis tank, and "stirs" the electrolysis reaction area in the electrolysis tank to reduce concentration polarization and reduce power consumption. After the alkaline solution is separated from hydrogen and oxygen gas by gravity in the hydrogen separator and oxygen separator, it is collected through the communication pipe of the hydrogen-oxygen separator, pumped into the alkaline filter to remove mechanical impurities, and then sent to the electrolysis tank to form a complete electrolysis circulation system.

[0051] For example, the function of the hydrogen separator and the oxygen separator is to separate the hydrogen and oxygen generated in the electrolysis tank from the electrolyte. With the help of the circulation of the electrolyte and the difference in gas-liquid specific gravity, hydrogen is separated from the cathode side of the electrolysis cell, and oxygen is separated from the anode side of the electrolysis cell.

[0052] In some embodiments, the processor is configured to:

[0053] acquire an abnormal signal corresponding to the performance indicator, and adjust the control parameter of each electrolysis cell in response to the abnormal signal, and determine the faulty electrolysis cell according to feedback information of each electrolysis cell.

[0054] For example, when the temperature indicator and / or the pressure indicator is out of the normal range, an abnormal signal is generated, and the control parameter of each electrolysis cell is adjusted in response to the abnormal signal, for example, the hydrogen production of each electrolysis cell is reduced, and the feedback information of the control parameter of each electrolysis cell after adjustment is acquired, and the faulty electrolysis cell is determined according to the feedback information.

[0055] For example, the feedback information can be the change of the performance indicator after adjustment of the control parameter of each electrolysis cell. If the abnormal condition of the performance indicator is improved after the hydrogen production of a certain electrolysis cell is reduced, it indicates that the electrolysis cell is abnormal, and is the faulty electrolysis cell.

[0056] In some embodiments, the processor, in the process of acquiring the abnormal signal corresponding to the performance indicator and adjusting the control parameter of each electrolysis cell in response to the abnormal signal, is configured to:

[0057] When the temperature indicator and the pressure indicator are in the warning range, a first abnormal signal is generated, and the first abnormal signal is used to control the water electrolysis hydrogen production device to perform interlock shutdown operation;

[0058] When the temperature indicator and the pressure indicator are in the pre-warning range, a second abnormal signal is generated, and the second abnormal signal is used to instruct the water electrolysis hydrogen production device to adjust the control parameter of each electrolysis cell.

[0059] For example, in order to improve the safety of the water electrolysis hydrogen production device, two abnormal ranges are set, which are the warning range and the pre-warning range. When the performance indicator is in the warning range, it indicates that the abnormality is relatively serious, and at this time, interlock shutdown is required to stop hydrogen production to avoid production accidents caused by high temperature or high pressure.

[0060] When the performance indicator is in the pre-warning range, it indicates that the performance indicator of the water electrolysis hydrogen production device is abnormal, but the abnormality is relatively slight, and at this time, interlock shutdown can not be performed, and the faulty electrolysis cell can be located or excluded by adjusting the control parameter.

[0061] In some embodiments, the pre-warning range is surrounded by the warning range.

[0062] It can be understood that the normal range of the performance indicator is narrower than the pre-warning range, and the pre-warning range is narrower than the warning range.

[0063] For example, assuming that the normal range of the temperature index is (60℃, 80℃), the pre-warning range can be (50℃, 60℃]∪[80℃, 92℃), and the alarm range can be (-∞, 50℃]∪[92℃, +∞). Of course, the pre-warning range and the alarm range of the temperature index and the pressure index can also be set according to actual needs, which are not limited herein.

[0064] In some embodiments, the interlocked shutdown operation comprises at least one of:

[0065] controlling the rectifying component to stop supplying power to the electrolysis cell when the pressure index is greater than a preset pressure;

[0066] controlling the rectifying component to stop supplying power to the electrolysis cell and increasing the flow rate of the cooling liquid in the circulating liquid circuit when the temperature index is greater than a preset temperature;

[0067] controlling the rectifying component to stop supplying power to the electrolysis cell when the liquid level of any one of the hydrogen separator or the oxygen separator is less than a lower limit of the liquid level;

[0068] increasing the flow rate of the alkali liquid in the circulating liquid circuit when the circulating alkali amount of the circulating liquid circuit is less than a preset flow rate.

[0069] For example, when the performance index reaches the alarm range, an alarm is given through an acousto-optic-electric signal to prompt the staff to maintain the water electrolysis hydrogen production device, and the power supply is cut off to stop gas production, thereby avoiding damage to the device or safety accidents. Specifically, when the pressure index is greater than a preset pressure, the power supply of the rectifying component is cut off to avoid damage to the water electrolysis hydrogen production device due to excessively high pressure; when the temperature index is greater than a preset temperature, the power supply of the rectifying component is cut off and the circulating amount of the alkali liquid is opened to the maximum to rapidly cool down, thereby preventing the asbestos diaphragm cloth in the electrolysis cell from being dissolved and damaged in the electrolyte due to excessively high temperature, and thus causing mixing of hydrogen and oxygen gas to cause accidents.

[0070] For example, the performance index can also include other indexes, such as the liquid level of the hydrogen separator, the liquid level of the oxygen separator, the circulating alkali amount, etc. Specifically, when the liquid level of the hydrogen separator or the oxygen separator is too low, the power supply of the rectifying component is cut off to avoid mixing of hydrogen and oxygen gas due to excessively low liquid level in the two separators, thereby producing dangerous detonation gas; when the circulating alkali amount of the circulating liquid circuit is less than a preset flow rate, the flow rate of the alkali liquid in the circulating liquid circuit is increased to avoid excessively small circulating amount of the alkali liquid, which can cause rapid temperature rise in the electrolysis cell and damage the electrolysis cell, thereby causing serious consequences.

[0071] In some embodiments, the rectifying component is connected with a transformer, and the transformer is provided with a thermal overload relay and an air switch.

[0072] For example, in the operation of a water electrolysis hydrogen production unit, if the transformer is under overload for an extended period (i.e., the actual load current exceeds its rated current), the transformer windings will generate excessive heat. A thermal overload relay can determine if there is an overload based on the heating status of the transformer windings. Its internal bimetallic strip bends and deforms when heated; when the deformation reaches a certain level, it triggers the relay to disconnect the circuit. For instance, assuming the transformer's rated current is 100A, if the actual current continuously exceeds 110A (the specific overload percentage depends on the setting), the thermal overload relay will activate its protection mechanism to prevent damage to the transformer windings due to overheating.

[0073] For example, when a short circuit occurs in the circuit of a water electrolysis hydrogen production unit, the short circuit current will increase dramatically. An air circuit breaker can detect this abnormal current within a short time and quickly disconnect the circuit. For instance, in a water electrolysis hydrogen production unit, if the electrode insulation of the electrolyzer is damaged, causing a short circuit, the short circuit current may instantly reach several times or even tens of times the normal operating current. The electromagnetic trip unit of the air circuit breaker will activate due to the strong magnetic field, quickly cutting off the power supply and preventing further damage to equipment such as transformers and electrolyzers from the short circuit current, while also avoiding dangerous situations such as fires caused by the short circuit.

[0074] In some embodiments, adjusting the control parameters of each electrolysis cell according to the performance indicators to identify electrolysis cells with abnormalities includes:

[0075] At a first moment, a first adjustment operation is performed on the control parameters of at least one candidate electrolyzer, the first adjustment operation being used to decrease the control parameters to reduce the hydrogen production of the candidate electrolyzer;

[0076] Between the first and second time points, the performance index is detected. If the performance index meets the first preset condition, a second adjustment operation is performed on the control parameters of the candidate electrolyzer. The second adjustment operation is used to reduce the control parameters to reduce the hydrogen production of the candidate electrolyzer.

[0077] After the second time point, the performance index is detected, and if the performance index meets the second preset condition, the faulty electrolysis chamber is determined according to the candidate electrolysis chamber;

[0078] The adjustment amounts of the control parameters are different in the first adjustment operation and the second adjustment operation.

[0079] Exemplarily, the candidate electrolytic cell is determined from the plurality of electrolytic cells of the electrolytic tank, and the control parameter adjustment operation is performed for each candidate electrolytic cell respectively. Specifically, each electrolytic cell of the electrolytic tank can be determined as a candidate electrolytic cell in turn. Alternatively, a binary method can be used to determine half of the electrolytic cells as candidate electrolytic cells, so as to determine which half the faulty electrolytic cell is in.

[0080] Exemplarily, in order to avoid the contingency of the performance parameter change, the control parameter adjustment operation is performed twice, and if the feedback results of the two control parameter adjustment operations both satisfy the preset condition, it is determined that the fault of the candidate electrolytic cell is the cause of the abnormal performance parameter before the control parameter adjustment operation is performed.

[0081] Exemplarily, a first adjustment operation is performed at a first time, if the performance indicators at the first time and the second time meet a first preset condition, a second adjustment operation is performed at a second time, if the performance indicators after the second time meet a second preset condition, it is determined that the candidate electrolytic cell has a fault, wherein the first adjustment operation and the second adjustment operation are used to reduce the hydrogen production of the candidate electrolytic cell, the adjustment amount of the control parameter of the first adjustment operation and the second adjustment operation is different, and the size can be set according to actual needs, the values of the first preset condition and the second preset condition are different.

[0082] In some embodiments, the control parameter includes current density, and the second adjustment operation is performed on the control parameter of the candidate electrolytic cell when the performance indicator meets the first preset condition, including:

[0083] In the case where the change value of the temperature indicator is greater than ΔT and the change value of the pressure indicator is greater than ΔP, it is determined that the performance indicator meets the first preset condition, wherein ΔT and ΔP are determined according to the following formula:

[0084] ;

[0085] G i represents the transfer matrix of the i th candidate electrolytic cell, a represents the temperature basic response coefficient, and β represents the pressure basic response coefficient, G i represents the system compensation constant, G i represents the change amount of the current density of the i th candidate electrolytic cell.

[0086] Exemplarily, the hydrogen production of the electrolytic cell is controlled by the current density of the current applied by the rectifying component, the first adjustment operation reduces the current density of the i th candidate electrolytic cell by so as to reduce the hydrogen production of the candidate electrolytic cell, if the corresponding reduced amount of the temperature indicator is greater than ΔT or the corresponding reduced amount of the pressure indicator is greater than ΔP, it is indicated that the candidate electrolytic cell meets the first preset condition, and further adjustment operation is performed on the candidate electrolytic cell.

[0087] The transfer matrix embodies the influence weight of the candidate electrolysis chamber on the global, for example; the system compensation constant is related to the electrolysis cell design parameters, used to cover inherent factors not directly affected by the current density, wherein The environmental heat dissipation compensation is used to describe the heat dissipation capacity of the water electrolysis hydrogen production device, which can be the heat dissipation amount of the water electrolysis hydrogen production device per unit time; The back pressure valve set value in the water electrolysis hydrogen production device.

[0088] In some embodiments, the temperature basic response coefficient α and the pressure basic response coefficient β are determined according to the following formula:

[0089] ;

[0090] ;

[0091] wherein, represents the ohmic efficiency, represents the electrolysis chamber resistance, represents the chemical reaction heat, ρ represents the circulating liquid density, c represents the circulating liquid specific heat capacity, and V represents the circulating liquid volume;

[0092] γ represents the gas molar generation rate coefficient, represents the gas phase volume, δ represents the flow channel design coefficient, μ represents the electrolyte viscosity, and v represents the electrolyte flow rate, represents the number of moles of gas generated per unit time.

[0093] For example, α is calculated according to the change of the reaction heat distribution caused by the decrease of the current density and the Joule heat loss, used to represent the amount of Joule heat loss, used to represent the change amount of reaction heat.

[0094] For example, β is determined according to the change amount of the generated gas volume and the fluid resistance, wherein represents the change amount of the gas volume, represents the change amount of the fluid resistance.

[0095] In the above formula, J represents the current density of the candidate electrolysis chamber after the control parameter adjustment operation.

[0096] In some embodiments, and are determined according to the following formula:

[0097] ;

[0098] ;

[0099] wherein λ represents the thermal conduction decay coefficient, represents the distance from the circulation liquid inlet to the circulation liquid channel of the i-th candidate electrolysis chamber, represents the distance decay coefficient, when the candidate electrolysis chamber is closer to the circulation liquid inlet , when the candidate electrolysis chamber is closer to the circulation liquid outlet ;

[0100] represents the permeability of the porous transport layer, represents the effective area of the candidate electrolysis chamber.

[0101] For example, when the current density decreases, the cell voltage decreases, and the heat generation decreases, but the electrolyte flow rate at low current may weaken the heat dissipation, and the heat capacity coefficient needs to be combined to modify. Similarly, the decrease of current density leads to the decrease of gas production, which in turn causes the decrease of gas phase pressure; but the bubble retention at low flow rate may increase the local resistance, and the gas diffusion capacity of different small chambers needs to be weighted.

[0102] wherein the thermal conduction decay coefficient is related to the heat preservation material of the electrolysis cell, and the permeability of the porous transport layer is a physical parameter describing the fluid (water, gas) passing through the internal pore structure of the porous transport layer of the electrolysis small chamber, reflecting the degree of hindering of the porous transport layer to the gas-liquid transport.

[0103] The water electrolysis hydrogen production device control system of the present application can be used in many general or special computing system environments or configurations. For example: personal computers, server computers, handheld devices or portable devices, tablet devices, multi-processor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics, network PCs, minicomputers, mainframe computers, distributed computing environments including any of the above systems or devices, etc. The present application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present application can also be practiced in a distributed computing environment, in which tasks are performed by remote processing devices connected by a communication network. In a distributed computing environment, program modules can be located in local and remote computer storage media, including storage devices.

[0104] For example, the water electrolysis hydrogen production device control system described above can be implemented in the form of a computer program, which can run on a computer device as shown in Figure 2 .

[0105] Please refer to Figure 2 , Figure 2A structural schematic block diagram of a computer device provided in an embodiment of the present application is shown. The computer device can be a server or a terminal.

[0106] As shown in Figure 2 the computer device includes a processor, a memory and a network interface connected through a system bus, wherein the memory can include a storage medium and an internal memory.

[0107] The storage medium can store an operating system and a computer program. The computer program includes program instructions which, when executed, can cause the computer device to function as any one of a water electrolysis hydrogen production device control system.

[0108] The processor is configured to provide computing and control capabilities to support the operation of the entire computer device.

[0109] The internal memory provides an environment for the execution of the computer program in the storage medium, which, when executed by the processor, can cause the computer device to function as any one of a water electrolysis hydrogen production device control system.

[0110] The network interface is configured to perform network communication, such as sending assigned tasks, etc. Those skilled in the art can understand that Figure 2 The structure shown in the above embodiment is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the computer device to which the scheme of the present application is applied. The specific computer device can include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0111] It should be understood that the processor can be a central processing unit (CPU), and the processor can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0112] In one embodiment, the processor is configured to run a computer program stored in the memory to function as one of the following water electrolysis hydrogen production device control systems:

[0113] The water electrolysis hydrogen production device comprises an electrolytic cell for electrolysis to produce hydrogen, a rectifying component for providing electric current to the electrolytic cell, a circulating liquid path for inputting and outputting electrolyte to the electrolytic cell, a hydrogen separator for separating hydrogen from electrolyte, and an oxygen separator for separating oxygen from electrolyte; the electrolytic cell comprises a plurality of electrolytic cells;

[0114] The water electrolysis hydrogen production device control system comprises a processor for obtaining performance indicators of the water electrolysis hydrogen production device, adjusting control parameters of each electrolytic cell according to the performance indicators, and determining abnormal electrolytic cells; wherein the performance indicators at least include a temperature indicator and a pressure indicator, the temperature indicator is the temperature of the circulating liquid path, and the pressure indicator is the pressure of the electrolytic cell.

[0115] In some embodiments, the processor, in the process of determining abnormal electrolytic cells according to the performance indicators, is configured to:

[0116] obtain abnormal signals corresponding to the performance indicators, adjust the control parameters of each electrolytic cell in response to the abnormal signals, and determine fault electrolytic cells according to feedback information of each electrolytic cell.

[0117] In some embodiments, the processor, in the process of obtaining abnormal signals corresponding to the performance indicators and adjusting the control parameters of each electrolytic cell in response to the abnormal signals, is configured to:

[0118] In the case that the temperature indicator and the pressure indicator are in an alarm range, a first abnormal signal is sent, and the first abnormal signal is used to control the water electrolysis hydrogen production device to perform an interlocked shutdown operation;

[0119] In the case that the temperature indicator and the pressure indicator are in a pre-warning range, a second abnormal signal is sent, and the second abnormal signal is used to instruct the water electrolysis hydrogen production device to adjust the control parameters of each electrolytic cell.

[0120] In some embodiments, the pre-warning range is surrounded by the alarm range.

[0121] In some embodiments, the interlocked shutdown operation comprises at least one of the following:

[0122] In the case that the pressure indicator is greater than a preset pressure, the rectifying component is controlled to stop supplying power to the electrolytic cell;

[0123] In the case that the temperature indicator is greater than a preset temperature, the rectifying component is controlled to stop supplying power to the electrolytic cell, and the flow rate of the cooling liquid of the circulating liquid path is increased;

[0124] In a case where the liquid level of any one of the hydrogen separator or the oxygen separator is less than a lower limit of the liquid level, the rectifying component is controlled to stop power supply to the electrolytic cell;

[0125] In a case where the circulating alkali amount of the circulating liquid path is less than a preset flow rate, the alkali flow rate of the circulating liquid path is increased.

[0126] In some embodiments, the rectifying component is connected with a transformer, and the transformer is provided with a thermal overload relay and an air switch.

[0127] In some embodiments, the control parameter of each electrolytic cell is adjusted according to the performance index, and the electrolytic cell with an abnormality is determined, including:

[0128] In a first time, a first adjustment operation is performed on the control parameter of at least one candidate electrolytic cell, and the first adjustment operation is used to reduce the control parameter to reduce the hydrogen production of the candidate electrolytic cell;

[0129] Between the first time and a second time, the performance index is detected, and in a case where the performance index meets a first preset condition, a second adjustment operation is performed on the control parameter of the candidate electrolytic cell, and the second adjustment operation is used to reduce the control parameter to reduce the hydrogen production of the candidate electrolytic cell;

[0130] After the second time, the performance index is detected, and in a case where the performance index meets a second preset condition, a fault electrolytic cell is determined according to the candidate electrolytic cell.

[0131] The adjustment amount of the first adjustment operation and the second adjustment operation on the control parameter is different.

[0132] In some embodiments, the control parameter includes a current density, and in a case where the performance index meets the first preset condition, the second adjustment operation is performed on the control parameter of the candidate electrolytic cell, including:

[0133] In a case where the change value of the temperature index is greater than ΔT, and the change value of the pressure index is greater than ΔP, it is determined that the performance index meets the first preset condition, wherein ΔT and ΔP are determined according to the following formula:

[0134] ;

[0135] represents a transfer matrix of the i th candidate electrolytic cell, α represents a temperature basic response coefficient, and β represents a pressure basic response coefficient, represents a system compensation constant, represents a change amount of the current density of the i th candidate electrolytic cell.

[0136] In some embodiments, the temperature-based response coefficient a, the pressure-based response coefficient β are determined according to the following formula:

[0137] ;

[0138] ;

[0139] wherein, represents the ohmic efficiency, represents the electrolytic chamber resistance, represents the chemical reaction heat, p represents the circulating liquid density, c represents the circulating liquid specific heat capacity, and V represents the circulating liquid volume;

[0140] γ represents the gas molar generation rate coefficient, represents the gas phase volume, δ represents the flow channel design coefficient, μ represents the electrolyte viscosity, and v represents the electrolyte flow rate, represents the number of moles of gas generated per unit time.

[0141] In some embodiments, and are determined according to the following formula:

[0142] ;

[0143] ;

[0144] wherein, λ represents the thermal conduction attenuation coefficient, represents the distance from the circulating liquid inlet of the i th candidate electrolytic chamber to the circulating liquid path flow channel, represents the distance attenuation coefficient, when the candidate electrolytic chamber is closer to the circulating liquid inlet , when the candidate electrolytic chamber is closer to the circulating liquid outlet ;

[0145] represents the permeability of the porous transport layer, represents the effective area of the candidate electrolytic chamber.

[0146] It should be noted that, for the convenience and brevity of description, the specific working process of the computer device described above can be referred to the corresponding process in the foregoing control method embodiments, which will not be described here.

[0147] The embodiments of the present application also provide a computer readable storage medium, the computer readable storage medium stores a computer program, the computer program includes program instructions, and the method implemented by the program instructions when executed can refer to each embodiment of the water electrolysis hydrogen production device control system of the present application.

[0148] The computer readable storage medium can be an internal storage unit of the computer device, such as a hard disk or a memory of the computer device. The computer readable storage medium can also be an external storage device of the computer device, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, and the like.

[0149] It should be understood that the terms used herein are merely for the purpose of describing particular embodiments and are not intended to limit the present application. As used in the specification and the appended claims, the singular forms "a," "an" and "the" are intended to include plural forms as well, unless the context clearly indicates otherwise.

[0150] It should also be understood that the term "and / or" as used herein refers to any combination of associated terms, and all possible combinations, and includes these combinations. It should be noted that the terms "comprise", "comprising", or any other variant thereof, are intended to encompass non-exclusive inclusion, so that processes, methods, articles, or systems that include a series of elements include not only those elements, but also other elements not explicitly listed, or other elements inherent to such processes, methods, articles, or systems. Without more limitations, the element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or system that includes the element.

[0151] The above-mentioned sequence numbers of the embodiments of the present application are only for description, and do not represent the advantages or disadvantages of the embodiments. The above description is merely a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A water electrolysis hydrogen generation device control system characterized by comprising: The water electrolysis hydrogen production device comprises: an electrolytic cell for electrolysis to produce hydrogen, a rectifying component for providing current to the electrolytic cell, a circulating liquid circuit for inputting and outputting electrolyte to the electrolytic cell, a hydrogen separator for separating hydrogen from electrolyte, and an oxygen separator for separating oxygen from electrolyte; the electrolytic cell comprises a plurality of electrolytic cells; The water electrolysis hydrogen production device control system comprises a processor for obtaining performance indicators of the water electrolysis hydrogen production device, and adjusting control parameters of each electrolytic cell according to the performance indicators to determine abnormal electrolytic cells; wherein the performance indicators at least include: temperature indicators, pressure indicators, the temperature indicators are the temperature of the circulating liquid circuit, and the pressure indicators are the pressure of the electrolytic cell; Wherein, the performance indicators are adjusted according to the performance indicators of each electrolytic cell to determine the abnormal electrolytic cell, comprising: Performing a first adjustment operation on the control parameters of at least one candidate electrolytic cell at a first time, the first adjustment operation is used to reduce the control parameters to reduce the hydrogen production of the candidate electrolytic cell; Between the first time and the second time, the performance indicators are detected, and the control parameters of the candidate electrolytic cell are adjusted according to the second adjustment operation in the case that the performance indicators meet the first preset condition, the second adjustment operation is used to reduce the control parameters to reduce the hydrogen production of the candidate electrolytic cell; After the second time, the performance indicators are detected, and the fault electrolytic cell is determined according to the candidate electrolytic cell in the case that the performance indicators meet the second preset condition; Wherein, the adjustment amount of the control parameters of the first adjustment operation and the second adjustment operation is different; Wherein, the control parameters include current density, and the second adjustment operation is performed on the control parameters of the candidate electrolytic cell in the case that the performance indicators meet the first preset condition, comprising: In the case that the change value of the temperature indicators is greater than ΔT, and the change value of the pressure indicators is greater than ΔP, it is determined that the performance indicators meet the first preset condition, wherein ΔT and ΔP are determined according to the following formula: ； a transfer matrix representing the i-th candidate electrolytic chamber, a represents a temperature base response coefficient, β represents a pressure base response coefficient, a system compensation constant, a current density variation amount of the i-th candidate electrolytic chamber; Wherein, the temperature basic response coefficient α and the pressure basic response coefficient β are determined according to the following formula: ； ； wherein, represents the ohmic efficiency, represents the electrolysis chamber resistance, represents the chemical reaction heat, p represents the circulating liquid density, c represents the circulating liquid specific heat capacity, and V represents the circulating liquid volume; γ represents a gas molar generation coefficient, represents the gas phase volume, δ represents a flow passage design coefficient, μ represents the electrolyte viscosity, and v represents the electrolyte flow rate, represents the number of moles of gas generated per unit time; wherein and are determined according to the following formula: ； ； wherein λ represents a thermal conduction attenuation coefficient, represents a distance from the circulation liquid inlet to the circulation liquid path of the i-th candidate electrolysis chamber, represents a distance attenuation coefficient, when the candidate electrolysis chamber is closer to the circulation liquid inlet , when the candidate electrolysis chamber is closer to the circulation liquid outlet ; represents the permeability of the porous transport layer, represents the effective area of the candidate electrolysis chamber.

2. The water electrolysis hydrogen generation device control system according to claim 1, characterized by, The processor is used to: Obtain the abnormal signal corresponding to the performance indicators, and adjust the control parameters of each electrolytic cell in response to the abnormal signal, and determine the fault electrolytic cell according to the feedback information of each electrolytic cell.

3. The water electrolysis hydrogen generation device control system according to claim 2, characterized by, The processor is used to: In the case that the temperature indicators and the pressure indicators are in the alarm range, a first abnormal signal is sent, the first abnormal signal is used to control the water electrolysis hydrogen production device to perform interlock shutdown operation; In the case that the temperature index and the pressure index are in a pre-warning range, a second abnormal signal is sent, which is used to indicate that the water electrolysis hydrogen production device adjusts the control parameters of each electrolysis cell.

4. The water electrolysis hydrogen generation device control system according to claim 3, characterized by, The pre-warning range is surrounded by the warning range.

5. The water electrolysis hydrogen generation device control system according to claim 3, characterized by, The interlocked shutdown operation includes at least one of the following: In the case that the pressure index is greater than a preset pressure, the rectifying component is controlled to stop power supply to the electrolysis cell; In the case that the temperature index is greater than a preset temperature, the rectifying component is controlled to stop power supply to the electrolysis cell, and the flow of the cooling liquid in the circulating liquid circuit is increased; In the case that the liquid level of any one of the hydrogen separator or the oxygen separator is less than a lower limit of the liquid level, the rectifying component is controlled to stop power supply to the electrolysis cell; In the case that the circulating alkali amount in the circulating liquid circuit is less than a preset flow, the flow of the alkali liquid in the circulating liquid circuit is increased.

6. The water electrolysis hydrogen generation plant control system according to any one of claims 1-5, characterized in that, The rectifying component is connected with a transformer, and the transformer is provided with a thermal overload relay and an air switch.

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