Protection control method of electrolytic power supply, upper computer and electrolytic hydrogen production system

Abstract

The invention provides a protection control method of an electrolytic power supply, an upper computer and an electrolytic hydrogen production system. The method comprises the following steps: acquiring an operating state of an electrolytic hydrogen production device and / or operating parameters of the electrolytic power supply; determining a protection strategy according to the operation state of the electrolytic hydrogen production device and / or the operation parameters of the electrolytic power supply; and controlling the electrolysis power supply control device to execute a protection action corresponding to the protection strategy. By means of the protection mode, the electrolytic power source can be cut in or cut out in a targeted mode according to the real-time conditions of the electrolytic hydrogen production device and the electrolytic power source in the operation process, protection of core components such as an electrolytic cell in the electrolytic hydrogen production device is achieved, and the safety and reliability of operation of the electrolytic hydrogen production system are improved.

Description

Technical Field

[0001] The present application relates to the technical field of electrolytic hydrogen production, and particularly to a protection control method for an electrolytic power supply, a host computer, and an electrolytic hydrogen production system. Background Art

[0002] PEM electrolytic water hydrogen production is based on a proton exchange membrane (Proton Exchange Membrane, abbreviated as PEM) as an electrolyte, and hydrogen and oxygen are produced by electrolyzing water. Electrolysis is a core part of it, and the most important device required for electrolysis is the electrolytic power supply.

[0003] As a crucial and indispensable part of the PEM electrolytic water hydrogen production system, the reasonable switching-in and switching-out of the electrolytic power supply is particularly critical. In the prior art, there are no perfect power protection measures, which cannot ensure the safe and reliable operation of the hydrogen production system in terms of electrolysis, and there is a certain risk. Summary of the Invention

[0004] To solve the existing technical problems, the present application provides a protection control method for an electrolytic power supply, a host computer, and an electrolytic hydrogen production system, which can effectively improve the reliability and safety of the operation of the electrolytic hydrogen production system.

[0005] In a first aspect, a protection control method for an electrolytic power supply is provided. The method includes:

[0006] Obtaining the operating state of the electrolytic hydrogen production device and / or the operating parameters of the electrolytic power supply;

[0007] Determining a protection strategy according to the operating state of the electrolytic hydrogen production device and / or the operating parameters of the electrolytic power supply;

[0008] Controlling the electrolytic power supply control device to execute the protection actions corresponding to the protection strategy.

[0009] In a second aspect, a host computer is provided, including a processor and a memory connected to the processor. A computer program executable by the processor is stored on the memory. When the computer program is executed by the processor, the steps of the above protection control method for the electrolytic power supply are implemented.

[0010] In a third aspect, an electrolytic hydrogen production system is provided, including an electrolytic power supply control device, an electrolytic hydrogen production device, and the above host computer;

[0011] The electrolytic power supply control device includes an electrolytic power supply and a plurality of control switches; the plurality of control switches and the electrolytic hydrogen production device are connected to the host computer;

[0012] The host computer sends a control signal to the control switch corresponding to the protection strategy, and the control switch is turned on or off in response to the control signal. The electrolysis power supply performs a protection action corresponding to the protection strategy according to the state of the control switch.

[0013] The protection control method of the electrolysis power supply provided in the above-mentioned embodiment determines the protection strategy according to the operating state of the electrolysis hydrogen production device and / or the operating parameters of the electrolysis power supply, and controls the electrolysis power supply control device to execute the protection action corresponding to the protection strategy. This method can realize the linkage protection control of the electrolysis power supply according to the operating state of the electrolysis hydrogen production device, and realize the local protection control according to the needs of the electrolysis power supply itself. Therefore, by using this protection method, it is possible to realize the targeted cutting in or out of the electrolysis power supply according to the real-time situation of the electrolysis hydrogen production device and the electrolysis power supply during operation, realize the protection of the core components such as the electrolytic cell in the electrolysis hydrogen production device, and improve the safety and reliability of the operation of the electrolysis hydrogen production system.

[0014] The host computer and the electrolysis hydrogen production system provided in the above embodiments belong to the same concept as the corresponding electrolysis power supply protection control method embodiments, and thus have the same technical effects as the corresponding electrolysis power supply protection control method embodiments, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. 1 is a schematic structural diagram of a hydrogen production system by electrolysis in one embodiment.

[0016] Figure 2 FIG. 1 is a schematic structural diagram of a hydrogen production system by electrolysis in one embodiment.

[0017] Figure 3 The figure is a flow chart of a protection control method for an electrolytic power source in one embodiment.

[0018] Figure 4 1 is a schematic diagram of the control logic of the electrolysis power supply in one embodiment.

[0019] Figure 5 The figure is a flow chart of a protection control method for an electrolytic power source in one embodiment.

[0020] Figure 6 The figure is a flow chart of a protection control method for an electrolytic power source in one embodiment. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the following will further describe this application in detail in conjunction with the accompanying drawings. The described embodiments should not be regarded as limitations of this application. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

[0023] In the following description, the expression "some embodiments" describes a subset of all possible embodiments. It should be noted that "some embodiments" can be the same subset or different subsets of all possible embodiments, and they can be combined with each other without conflict.

[0024] In the following description, the terms "first," "second," and "third" are merely used to distinguish similar objects and do not represent a specific order for the objects. It can be understood that "first," "second," and "third" can be interchanged in a specific order or sequence when permitted, so that the embodiments of this application described here can be implemented in an order other than that illustrated or described here.

[0025] As Figure 1 shown, the electrolytic hydrogen production system includes an electrolytic power supply control device 10, an electrolytic hydrogen production device 20, and a host computer 30. Among them, the electrolytic power supply control device 10 and the electrolytic hydrogen production device 20 are both connected to the host computer 30. The electrolytic hydrogen production device 20 includes an electrolytic cell 21, a circulation water tank 22, and a cooling device 23. The electrolytic cell 21 is the core component of the electrolytic hydrogen production device, and its function is to cause water molecules to undergo an electrochemical reaction on the electrodes under the action of direct current, thereby decomposing into hydrogen and oxygen. The circulation water tank 22 mainly plays the role of storing circulating water and separating oxygen in the electrolytic hydrogen production device. The cooling device 23 plays the role of regulating and controlling the temperature of the circulating water, ensuring the safety of hydrogen production, and improving the efficiency of hydrogen production in the electrolytic hydrogen production device.

[0026] The electrolytic power supply control device 10 can be a controller of the electrolytic power supply or a control switch of the electrolytic power supply, and is used to control the working state of the electrolytic power supply, such as controlling the start of the electrolytic power supply or cutting off the electrolytic power supply.

[0027] In one embodiment, the host computer obtains the operating state of the electrolytic hydrogen production device and / or the operating parameters of the electrolytic power supply; determines a protection strategy according to the operating state of the electrolytic hydrogen production device and / or the operating parameters of the electrolytic power supply; and controls the electrolytic power supply control device to execute the protection actions corresponding to the protection strategy.

[0028] In one embodiment, as Figure 2 shown, the electrolytic power supply control device 10 includes an electrolytic power supply 11 and control switches 12 corresponding to each protection strategy.

[0029] Among them, the control switch 12, the electrolytic cell 21 of the electrolytic hydrogen production device 20, the circulation water tank 22 and the cooling device 23 are all electrically connected to the upper computer 30.

[0030] The upper computer 30 obtains the operating status of the electrolytic hydrogen production device and / or the operating parameters of the electrolytic power supply; determines a protection strategy according to the operating status of the electrolytic hydrogen production device and / or the operating parameters of the electrolytic power supply; sends a control signal to the control switch corresponding to the protection strategy, and the control switch responds to the control signal to turn on or off, and the electrolytic power supply executes the protection action corresponding to the protection strategy according to the status of the control switch.

[0031] Among them, determining the protection strategy of the electrolytic power supply according to the operating status of the electrolytic hydrogen production device can realize the linkage protection control of the electrolytic power supply according to the operating status of the electrolytic hydrogen production device.

[0032] Among them, determining the protection strategy according to the operating parameters of the electrolytic power supply can realize the local protection control according to the own requirements of the electrolytic power supply.

[0033] The above electrolytic hydrogen production system can realize the linkage protection control of the electrolytic power supply according to the operating status of the electrolytic hydrogen production device, and the local protection control according to the own requirements of the electrolytic power supply. Thus, using this protection method can realize the targeted switching in or out of the electrolytic power supply according to the real-time situation of the electrolytic hydrogen production device and the electrolytic power supply during operation, realize the protection of core components such as the electrolytic cell in the electrolytic hydrogen production device, and improve the safety and reliability of the operation of the electrolytic hydrogen production system.

[0034] Such as Figure 3 shown, a protection control method for an electrolytic power supply includes the following steps:

[0035] Step 302, obtain the operating status of the electrolytic hydrogen production device and / or the operating parameters of the electrolytic power supply.

[0036] Among them, the operating status of the electrolytic hydrogen production device represents whether the electrolytic hydrogen production device is operating normally at present, and may include the following several statuses: meeting the hydrogen production conditions, normal operation, malfunction, and emergency.

[0037] The operating parameters of the electrolytic power supply include the real-time operating parameters of the internal components during the operation of the electrolytic power supply, including but not limited to supply voltage, output current, output voltage, temperature, etc.

[0038] Step 304, determine a protection strategy according to the operating status of the electrolytic hydrogen production device and / or the operating parameters of the electrolytic power supply.

[0039] The protection strategy specifically refers to how to switch in and out of the electrolytic power supply to achieve different degrees of protection for the electrolytic hydrogen production device.

[0040] The operating states of the hydrogen production device by electrolysis and / or the operating parameters of the electrolysis power supply are different, and the corresponding protection strategies and the protection degrees provided by the protection strategies are different, so that the hydrogen production device by electrolysis can be given different degrees of protection according to actual needs.

[0041] Among them, the protection strategy of the electrolysis power supply is determined according to the operating state of the electrolysis hydrogen production device, and the linkage protection control of the electrolysis power supply can be realized according to the operating state of the electrolysis hydrogen production device.

[0042] Among them, the protection strategy is determined according to the operating parameters of the electrolytic power supply, and the local protection control of the electrolytic power supply can be realized according to the needs of the electrolytic power supply itself.

[0043] Among them, the protection strategy is determined according to the operating status of the electrolytic hydrogen production device and the operating parameters of the electrolytic power supply, and the linkage protection control of the electrolytic power supply can be realized according to the operating status of the electrolytic hydrogen production device, and the local protection control of the electrolytic power supply can be realized according to the needs of the electrolytic power supply itself.

[0044] Step 306: Control the electrolysis power supply control device to execute a protection action corresponding to the protection strategy.

[0045] Among them, the protection strategy corresponds to the protection action to achieve different degrees of protection for the electrolytic hydrogen production device. The protection action can be a means of cutting out the electrolytic power supply to different degrees, such as controlling the electrolytic power supply to be turned off, controlling the electrolytic power supply main circuit breaker to be disconnected, etc. The protection action can also be a means of cutting in, such as controlling the electrolytic power supply to be turned on.

[0046] Specifically, after the upper computer determines the protection strategy, it sends a control signal corresponding to the protection strategy to the electrolysis power supply control device, and the electrolysis power supply control device executes the protection action corresponding to the protection strategy according to the control signal.

[0047] The above-mentioned protection control method of the electrolysis power supply determines the protection strategy according to the operating state of the electrolysis hydrogen production device and / or the operating parameters of the electrolysis power supply, and controls the electrolysis power supply control device to execute the protection action corresponding to the protection strategy. This method can realize the linkage protection control of the electrolysis power supply according to the operating state of the electrolysis hydrogen production device, and realize the local protection control according to the needs of the electrolysis power supply itself. Therefore, using this protection method can realize the targeted cutting in or out of the electrolysis power supply according to the real-time situation of the electrolysis hydrogen production device and the electrolysis power supply during operation, realize the protection of core components such as the electrolytic cell in the electrolysis hydrogen production device, and improve the safety and reliability of the operation of the electrolysis hydrogen production system.

[0048] In one embodiment, if Figure 2 As shown, the electrolysis power supply control device includes an electrolysis power supply 11 and a control switch 12. There are multiple control switches 12, each corresponding to a different protection strategy.

[0049] The electrolysis power supply control device is controlled to execute the protection actions corresponding to the protection strategies, including: sending a control signal to the control switch corresponding to the protection strategy, the control switch responding to the control signal to turn on or off, and the electrolysis power supply executing the protection actions corresponding to the protection strategy according to the state of the control switch.

[0050] Specifically, there are multiple control switches 12, and each control switch 12 corresponds to a different guarantee strategy. The upper computer controls the corresponding control switch 12 to turn on or off according to the protection strategy. The control switch 12 is electrically connected to the electrolysis power supply, and the electrolysis power supply executes the corresponding protection actions according to the on-signal or off-signal of the control switch 12.

[0051] In one embodiment, the protection strategy includes four levels, each level of protection strategy has a corresponding control switch, and the protection actions corresponding to each level of protection strategy are different. For example, the first-level protection strategy corresponds to the first control switch, the second-level protection strategy corresponds to the second control switch, the third-level protection strategy corresponds to the third control switch, and the fourth-level protection strategy corresponds to the fourth control switch.

[0052] When it is determined to trigger the first-level protection strategy according to the operating state of the electrolytic hydrogen production device and / or the operating parameters of the electrolysis power supply, a control signal is sent to the first control switch, the first control switch responds to the control signal and disconnects, and the electrolysis power supply executes the protection actions corresponding to the first-level protection strategy after detecting the disconnection of the first control switch.

[0053] In this embodiment, by setting the control switches corresponding to different protection strategies, the electrolysis power supply can identify and execute the corresponding protection actions by triggering the corresponding protection strategies according to the states of different control switches, improving the reliability of the protection of the electrolysis power supply.

[0054] In one embodiment, the level of the protection strategy is determined according to the operating state of the electrolytic hydrogen production device and / or the operating parameters of the electrolysis power supply; wherein, the level of the protection strategy is obtained by dividing according to the influence degree of the operating state and / or the operating parameters on the electrolytic hydrogen production device.

[0055] Specifically, the operating states of different electrolytic hydrogen production devices and / or the operating parameters of the electrolysis power supply have different influence degrees on the electrolytic hydrogen production device, and the levels of the corresponding protection strategies are also different.

[0056] Generally speaking, the greater the influence degree on the electrolytic hydrogen production device, the greater the level of the corresponding protection strategy, and the greater the protection degree of the protection strategy. For example, according to the influence degree of the operating state of the electrolytic hydrogen production device and / or the operating parameters of the electrolysis power supply on the electrolytic hydrogen production device, four levels of protection strategies are set. Among them, sorted according to the protection degree corresponding to the protection strategy from high to low, it is the first-level protection strategy > the second-level protection strategy > the third-level protection strategy > the fourth-level protection strategy.

[0057] By pre-dividing the levels of protection strategies corresponding to different operating states and / or operating parameters according to the influence degree of the operating state and / or operating parameters on the electrolytic hydrogen production device in advance, a mapping relation table as shown in Table 1 is established. During the actual operation of the electrolytic hydrogen production device, according to the real-time operating state of the electrolytic hydrogen production device and / or the operating parameters of the electrolytic power supply, by looking up Table 1, the corresponding level of the protection strategy can be determined.

[0058] Table 1 Mapping relation table of operating state and / or operating parameters and protection strategy levels

[0059]

[0060]

[0061] It should be noted that the above Table 1 is only an example and does not limit the specific contents of the operating state and operating parameters. In actual applications, hydrogen production manufacturers can flexibly set them according to actual needs. For example, a certain manufacturer sets the protection strategy as a three-level protection strategy for the operating state when the electrolytic hydrogen production device triggers the protection mechanism, and sets the protection strategy as a two-level protection strategy for the operating state when the electrolytic hydrogen production device fails.

[0062] In this embodiment, by determining the level of the protection strategy according to the operating state of the electrolytic hydrogen production device and / or the operating parameters of the electrolytic power supply, hierarchical protection with different protection degrees can be achieved for the electrolytic hydrogen production device according to the actual operating state and / or operating parameters.

[0063] In one embodiment, the protection action is to cut off the electrolytic power supply, and the thoroughness of the cut-off of the electrolytic power supply corresponding to different levels of protection strategies is different.

[0064] Among them, for different operating states of the electrolytic hydrogen production device and / or the operating parameters of the electrolytic power supply, a protection strategy is determined, and the electrolytic power supply control device is made to execute the protection action corresponding to the protection strategy, and the protection action is to cut off the electrolytic power supply. In this way, the electrolytic power supply can cut off the electrolytic power supply by means of cutting that conforms to the current operating situation according to the real-time operating state of the electrolytic hydrogen production device and / or the operating parameters of the electrolytic power supply, so as to provide a matching protection intensity for the electrolytic hydrogen production device.

[0065] Specifically, by adopting different cutting means for the electrolytic power supply, the electrolytic power supply is cut off by different cutting means and stops working. Different protection strategies have different thoroughness of the cut-off of the corresponding electrolytic power supply, and thus the corresponding protection degrees for the electrolytic hydrogen production device are also different to cope with different operating situations.

[0066] For example, the cutting means may include: the control module of the software-controlled electrolysis power supply does not trigger the power supply to start, the hardware devices (such as contactors, relays, etc.) that control the electrolysis power supply stop working, and the circuit breaker that cuts off the electrolysis power supply.

[0067] Among them, in terms of the thoroughness of cutting, ranked from high to low are: the circuit breaker that cuts off the electrolysis power supply, the hardware devices (such as contactors, relays, etc.) that control the electrolysis power supply stop working, and the control module of the software-controlled electrolysis power supply does not trigger the power supply to start.

[0068] Specifically, the circuit breaker that cuts off the electrolysis power supply can directly cut off the physical connection of the power supply, which is the most thorough cutting means and can ensure that the electrolysis power supply is completely and thoroughly cut off. When this method has a greater impact on the operation of the electrolytic hydrogen production device, cutting off the electrolysis power supply can maximize the safety operation of the electrolytic hydrogen production system.

[0069] And the hardware devices (such as contactors, relays, etc.) that control the electrolysis power supply stop working can cut off the power path and can cut off the power supply relatively thoroughly. However, there may still be a risk of tiny leakage current or conduction caused by aging of the contact points. When this method has a certain impact on the operation of the electrolytic hydrogen production device, cutting off the electrolysis power supply can ensure the safety operation of the electrolytic hydrogen production system.

[0070] The control module of the software-controlled electrolysis power supply does not trigger the power supply to start, which only prevents the start or operation of the power supply from the control logic level, but the power supply itself is not physically cut off. If there are other start-up conditions or hardware failures in the power supply system, it may still cause the power supply to start accidentally. When this method has a slight impact on the operation of the electrolytic hydrogen production device, cutting off the electrolysis power supply in a flexible and intelligent cutting method can ensure the safety operation of the electrolytic hydrogen production system.

[0071] By setting the corresponding electrolysis power supply cutting protection for different levels of protection strategies, it is realized to cut off the electrolysis power supply in different ways in different scenarios, improving the flexibility of protection control.

[0072] According to the operating state of the electrolytic hydrogen production device, determine the protection strategy, including:

[0073] When an emergency occurs during the operation of the electrolytic hydrogen production device, determine the primary protection strategy, and the protection action corresponding to the primary protection strategy is to cut off the circuit breaker of the electrolysis power supply.

[0074] Specifically, the primary protection strategy is emergency protection. The electrolytic hydrogen production device itself can detect the emergency, or the staff can trigger the emergency button of the electrolytic hydrogen production device to know that an emergency has occurred. For example, when the staff detects a fire, a large area of hydrogen leakage, a large area of water leakage in the water tank, etc. that can seriously threaten personal and equipment safety, they trigger the emergency button of the electrolytic hydrogen production device.

[0075] When an emergency occurs during the operation of the electrolytic hydrogen production device, a primary protection strategy is determined. The primary protection strategy has the highest protection level. The protection action corresponding to the primary protection strategy is to cut off the circuit breaker of the electrolytic power supply. This way of cutting off the electrolytic power supply directly cuts off the physical connection of the power supply, which is the most thorough way to cut off the electrolytic power supply of the electrolytic hydrogen production device. By using this method, it is possible to realize that when an emergency occurs during the operation of the electrolytic hydrogen production device, the physical connection of the electrolytic power supply is directly cut off through linkage control, protecting the core components of the electrolytic hydrogen production device and improving the operation safety of the electrolytic hydrogen production system.

[0076] In another embodiment, according to the operating state of the electrolytic hydrogen production device, a protection strategy is determined: when a fault occurs during the operation of the electrolytic hydrogen production device and the primary protection strategy is not triggered, a secondary protection strategy is determined, and the protection action corresponding to the secondary protection strategy is to control the hardware components of the electrolytic power supply to stop working.

[0077] Specifically, the secondary protection strategy is a fault protection.

[0078] When a fault occurs during the operation of the electrolytic hydrogen production device, such as a fault shutdown, etc., the secondary protection strategy of the electrolytic power supply is triggered.

[0079] Among them, when the following situations occur in the electrolytic hydrogen production device, a fault shutdown is triggered: the circulating water flow is not within the threshold range, the voltage of the electrolytic hydrogen production device is too high, the ambient hydrogen concentration is greater than the threshold, etc.

[0080] The protection action corresponding to the secondary protection strategy is to control the hardware of the electrolytic power supply (such as contactors, relays, and output modules, etc.) to stop working, which can cut off the power path and can cut off the power supply more thoroughly. By using this method, it is possible to realize that when a fault occurs during the operation of the electrolytic hydrogen production device, the hardware of the electrolytic power supply (such as contactors, relays, and output modules, etc.) is controlled to stop working through linkage, which can cut off the power path, protect the core components of the electrolytic hydrogen production device, and improve the operation safety of the electrolytic hydrogen production system.

[0081] In one embodiment, according to the operating parameters of the electrolytic power supply, a protection strategy is determined, including at least one of the following:

[0082] The first one: when the operating parameters of the electrolytic power supply during operation do not meet the first condition, a primary protection strategy is determined, and the protection action corresponding to the primary protection strategy is to cut off the circuit breaker of the electrolytic power supply.

[0083] The second one: when the operating parameters of the electrolytic power supply during operation do not meet the second condition, a secondary protection strategy is determined, and the protection action corresponding to the secondary protection strategy is to control the hardware components of the electrolytic power supply to stop working.

[0084] Among them, the operating parameters may include but are not limited to power supply parameters, current parameters, voltage parameters, and temperature parameters. Specifically, in this embodiment, by using the self-protection of the electrolysis power supply, the reliability and safety of the operation of the electrolytic hydrogen production system are ensured. At the same time, the electrolysis power supply can also be effectively protected itself, and the service life of the electrolysis power supply can be extended. The self-protection of the electrolysis power supply can be divided into the following types:

[0085] Power supply protection: Components inside the electrolysis power supply detect the magnitude of the AC input power supply voltage, generally ±10% of the input mains power. When it exceeds this range, the electrolysis power supply shuts down due to a fault, and the protection strategy is at least of the second level or above. For the three-phase AC power supply, components inside the power supply also need to detect whether there is a phase loss in the input three-phase voltage. When a certain phase is missing, the electrolysis power supply shuts down due to a fault, and the protection strategy is at least of the second level or above.

[0086] Output overcurrent protection: During the operation of the hydrogen production system, that is, during the electrolytic hydrogen production process, components inside the electrolysis power supply detect the current at the DC output end. When the output current exceeds the set value, the electrolysis power supply shuts down due to a fault, and the protection strategy is at least of the second level or above.

[0087] Output overvoltage protection: During the operation of the hydrogen production system, that is, during the electrolytic hydrogen production process, components inside the electrolysis power supply detect the voltage at the DC output end. When the output voltage exceeds the set value, the electrolysis power supply shuts down due to a fault, and the protection strategy is at least of the second level or above.

[0088] Overheat protection: Components inside the power supply detect the power supply temperature. When the temperature exceeds the rated value at the factory, the power supply shuts down due to a fault, and the protection strategy is at least of the second level or above.

[0089] Other protection functions should be added according to different usage scenarios. For example, for a water-cooled power supply, protection for the inlet and outlet water temperature and pressure of the chilled water, as well as internal condensation protection, etc., should also be added. The alarm information is obtained by comparing the data detected by the internal detection components with the set values. When it exceeds the set range, the electrolysis power supply shuts down due to a fault, and the protection strategy is at least of the second level or above.

[0090] Specifically, in actual applications, for the above operating parameters of the electrolysis power supply, according to the influence on the electrolysis power supply and the electrolytic hydrogen production device, when some operating parameters do not meet the first condition, a primary protection strategy is determined, and when some operating parameters do not meet the second condition, a secondary protection strategy is determined. For example, the second condition is set according to the parameters related to overheat protection, and the first condition is set according to the parameters related to power supply protection, output overcurrent protection, and output overvoltage protection. In this way, different levels of protection for the electrolysis power supply can be provided according to the operating parameters of the electrolysis power supply, so as to provide corresponding protection capabilities.

[0091] Accordingly, when any local protection of the electrolysis power supply triggers a shutdown, information is fed back to the electrolytic hydrogen production device through communication methods such as RS485, and the electrolytic hydrogen production device is linked to implement protection.

[0092] In one embodiment, the protection strategy is determined according to the operating state, including: when the electrolytic hydrogen production device does not meet the hydrogen production conditions, and neither the primary protection strategy nor the secondary protection strategy is triggered, the protection strategy of the electrolysis power supply is determined as the tertiary protection strategy; the protection action corresponding to the tertiary protection strategy is to immediately cut off the control module of the electrolysis power supply and control the control module of the electrolysis power supply not to trigger a start signal.

[0093] Specifically, before hydrogen production, the electrolytic hydrogen production device performs a primary protection detection of the hydrogen production device. The detection content may include: whether the circulating water temperature is within the threshold range, whether the liquid level of the circulating water tank is within the operating range, whether the ambient hydrogen concentration is abnormal, whether the hydrogen production working pressure is too high, whether the water quality conductivity is qualified, and whether the cooling water pressure is too low. When all the above conditions are met, it is determined that the electrolytic hydrogen production device meets the hydrogen production conditions. At this time, the electrolytic hydrogen production device is started.

[0094] During the operation of the electrolytic hydrogen production device, if it is detected that any of the above does not meet the conditions, it is determined that the electrolytic hydrogen production device does not meet the hydrogen production conditions. At this time, the tertiary protection strategy of the electrolysis power supply is triggered. The protection action corresponding to the tertiary protection strategy is to immediately cut off the control module of the electrolysis power supply by software, that is, the output current value of the electrolysis power supply immediately becomes 0A, and at the same time, control the control module of the electrolysis power supply not to trigger a start signal.

[0095] In another embodiment, the protection strategy is determined according to the operating state, including: when the electrolytic hydrogen production device does not meet the hydrogen production conditions in the remote working mode, and neither the primary protection strategy nor the secondary protection strategy is triggered, the tertiary protection strategy is determined; the protection action corresponding to the tertiary protection strategy is to immediately cut off the control module of the electrolysis power supply and control the electrolysis power supply to be in the standby state.

[0096] The main difference between the local working mode and the remote working mode of the electrolysis power supply is the current setting method. In the remote working mode, the current is set by the upper computer of the electrolytic hydrogen production system, and there is communication between the upper computer and the electrolytic hydrogen production device, which is the remote working mode of the electrolysis power supply. While in the local working mode of the electrolysis power supply, the current is directly set on the touch screen of the electrolysis power supply.

[0097] The tertiary protection strategy in this embodiment takes effect in both the local working mode and the remote working mode of the electrolysis power supply.

[0098] Specifically, in response to a given remote signal of the electrolytic hydrogen production device, if the electrolytic hydrogen production device meets the hydrogen production conditions, a start command is sent to the electrolytic power supply. This protection is an enabled protection. Before starting the electrolytic hydrogen production device, it is judged whether the electrolytic hydrogen production device meets the hydrogen production conditions. If the electrolytic hydrogen production device meets the hydrogen production conditions, a start command is sent to the electrolytic power supply. The electrolytic power supply starts when it detects that its own parameters meet the start conditions. This protection function can be understood as the protection of the system and the electrolytic cell. When the system has the hydrogen production conditions, an enable signal is sent to the electrolytic power supply.

[0099] When the electrolytic hydrogen production device does not meet the hydrogen production conditions during operation and neither the primary protection strategy nor the secondary protection strategy is triggered, the control module of the software-controlled electrolytic power supply is immediately cut off, and the output current value of the electrolytic power supply immediately becomes 0A. This protection immediately cuts off the electrolytic power supply when the electrolytic hydrogen production device does not meet the hydrogen production conditions during operation.

[0100] In one embodiment, the protection strategy is determined according to the operating state, including: when the electrolytic hydrogen production device does not meet the hydrogen production conditions in the remote working mode and neither the primary protection strategy nor the secondary protection strategy is triggered, the quaternary protection strategy is determined; the protection action corresponding to the quaternary protection strategy is that the control module of the software-controlled electrolytic power supply slowly reduces the power output current value to 0A at the load reduction rate and controls the electrolytic power supply to be in the standby state.

[0101] Specifically, the quaternary protection strategy is communication protection. This protection mode takes effect in the remote working mode. When the remote working mode is triggered, it is detected whether the electrolytic hydrogen production device meets the hydrogen production conditions. If it meets, a communication connection is established with the electrolytic power supply control device, and a start command is sent to the electrolytic power supply. The electrolytic power supply starts when it detects that its own parameters meet the start conditions. This protection function can be understood as the protection of the system and the electrolytic cell. When the system has the hydrogen production conditions, a communication signal is sent to the electrolytic power supply to establish a communication connection between the electrolytic power supply control device and the electrolytic hydrogen production device.

[0102] When the electrolytic hydrogen production device does not meet the hydrogen production conditions in the remote working mode and neither the primary protection strategy nor the secondary protection strategy is triggered, the quaternary protection strategy is determined; the protection action corresponding to the quaternary protection strategy is that the control module of the software-controlled electrolytic power supply slowly reduces the power output current value to 0A at the load reduction rate and controls the electrolytic power supply to be in the standby state.

[0103] Among them, the trigger conditions of the tertiary protection strategy and the quaternary protection strategy are similar, so that two-fold protection can be realized before and during the operation of the electrolytic hydrogen production device, improving the system stability.

[0104] In one embodiment, as Figure 4As shown in the electrical schematic diagram of the electrolytic power supply control logic, the control switches of the electrolytic power supply control device include an enable control switch 121, a communication control switch 122, a fault protection switch 123, and an emergency control switch 124.

[0105] Among them, the control switch corresponding to the primary protection strategy (i.e., the emergency protection strategy) is the emergency control switch 124, the control switch corresponding to the secondary protection strategy (i.e., the fault protection strategy) is the fault protection switch 123, the control switch corresponding to the tertiary protection strategy (i.e., the enable protection strategy) is the enable control switch 121, and the control switch corresponding to the quaternary protection strategy (i.e., the communication protection strategy) is the communication control switch 122.

[0106] In one embodiment, the relationship among the protection strategy, the control switch, and the protection action is shown in Table 2.

[0107] Table 2 Relationship table among operating status, protection strategy, control switch, and protection action

[0108]

[0109]

[0110] To improve the reliability of control, the above control switches can adopt passive contacts. Now, in combination with Figure 4 、 Figure 5 and Table 2, each protection strategy will be described in detail.

[0111] 1. Emergency protection (i.e., the primary protection strategy)

[0112] As Figure 4 shown, there is a passive contact interface (emergency control switch 124) for forcibly cutting off the total power supply outside the electrolytic power supply - ES1. When this contact signal is turned on, the main circuit breaker - QF1 of the electrolytic power supply trips. Specifically, when an emergency occurs in the hydrogen production system or the on - site use environment of the equipment, such as fire, large - area hydrogen leakage, large - area water leakage in the water tank, etc., which can seriously threaten the personal and equipment safety, this protection is triggered.

[0113] That is to say, when an emergency occurs during the operation of the electrolytic hydrogen production device, the primary protection strategy is triggered. The upper computer controls the hydrogen production system to turn on the emergency protection contact signal (emergency control switch 124), and the main circuit breaker - QF1 of the electrolytic power supply trips, cutting off all inputs and outputs. This protection is the highest - level protection of the power supply and belongs to the forced protection in terms of hardware.

[0114] 2. Fault protection (i.e., the secondary protection strategy)

[0115] The electrolysis power supply - ES1 is controlled by a remote fault signal. The fault signal is a passive contact, namely the fault protection switch 123. After the two points of the fault protection switch 123 are disconnected, the power supply immediately stops outputting, and the emergency stop program is executed inside the power supply to cut off the electrolysis power supply output. Before resetting, the electrolysis power supply output module cannot output current and voltage.

[0116] Specifically, when the electrolytic hydrogen production device fails and shuts down, the fault control signal is cut off, and the output inside the electrolysis power supply is cut off. Ultimately, it is manifested as hardware control, such as cutting off the contactor - KM1, and the power supply cannot be started. Even if a current is given, the power supply has no output value.

[0117] 3. Enable the protection strategy, that is, the three - level protection strategy.

[0118] The external enable signal is a passive contact (i.e., the enable control switch 121). Through the upper computer I / O interface inside the hydrogen production system, an instruction is sent. After the enable interface (i.e., the enable control switch 121) is connected / short - circuited, the electrolysis power supply can work normally. After the two points of the enable control switch 121 are disconnected, the electrolysis power supply cannot be started. When the electrolysis process is interrupted, the output current value of the electrolysis power supply immediately becomes 0A. This protection function can be understood as the protection of the system and the electrolyzer. When the system has the conditions for hydrogen production, this signal will be sent to the electrolysis power supply. This protection takes effect in both the local working mode and the remote working mode of the power supply, and is the highest - level protection in software protection. Using the dry contact method is safer and more reliable.

[0119] 4. Communication protection, that is, the four - level protection strategy.

[0120] The hydrogen production system gives the communication control switch 122 of the electrolysis power supply a start signal "1" or a stop signal "0" through communication methods such as Modbus - RTU or Modbus - TCP / IP. The electrolysis power supply starts or stops accordingly. This protection is also a software - based protection and only takes effect in the remote working mode. Its priority is lower than the enable protection. When the enable signal is disconnected, the start - stop function will not take effect. During operation, when a stop signal "0" is given to the communication control switch 122, the output current value of the power supply slowly drops to 0A according to the load - reduction rate.

[0121] As Figure 6 shown, in the case where the local protection of the electrolysis power supply is not triggered, if a remote signal from the electrolytic hydrogen production device is received, and the upper computer detects that the first - level protection strategy is not triggered, it controls the main circuit breaker of the electrolysis power supply to close, and the remote signal between the electrolysis power supply control device and the electrolytic hydrogen production device is connected. When the upper computer detects that the second - level protection strategy is not triggered, it controls the electrolysis power supply output module to be normal. When the upper computer detects that the third - level protection strategy is not triggered, it controls the enable signal of the electrolysis power supply to be normal. When the upper computer detects that the fourth - level protection strategy is not triggered, it controls the electrolysis power supply to start and performs operations such as current setting according to the usage situation.

[0122] When an emergency occurs during the operation of the electrolytic hydrogen production device, the first-level protection strategy is triggered to control the main circuit breaker of the electrolytic power supply to disconnect, and the electrolytic power supply is cut off and shut down.

[0123] When a fault occurs in the electrolysis hydrogen production device during operation and the primary protection strategy is not triggered, the secondary protection strategy is triggered, the electrolysis power output module is cut off, and the power cannot be output.

[0124] When the electrolytic hydrogen production device does not meet the hydrogen production conditions during operation, and neither the first-level protection strategy nor the second-level protection strategy is triggered, the third-level protection strategy is triggered, the electrolysis power enable prompt is disconnected, the software-controlled electrolysis power control module is immediately cut off, and the software-controlled electrolysis power control module does not trigger the power start, and the electrolysis power cannot be started.

[0125] When the electrolysis hydrogen production device does not meet the hydrogen production conditions in the remote working mode, and neither the first-level protection strategy nor the second-level protection strategy is triggered, the fourth-level protection strategy is triggered, and the control module of the software-controlled electrolysis power supply slowly reduces the power supply output current value to 0A according to the load reduction rate, and controls the electrolysis power supply to be in standby state.

[0126] The protection and control method of the electrolytic power supply of the present application has the following technical effects:

[0127] 1. The linkage protection function between the electrolysis power supply and the electrolysis hydrogen production device can be realized more systematically, which is more beneficial to the use of the electrolysis power supply.

[0128] 2. A more complete and standardized protection mechanism improves the stability of the entire system. Even if uncontrollable factors occur during system operation, protective actions can be taken immediately to reduce losses, providing greater protection for the personal safety of on-site operators.

[0129] 3. At different stages of the operation of the hydrogen production system and when different faults occur, the electrolytic power supply should make corresponding protective actions in a targeted manner, so as to protect the core components such as the electrolyzer in the hydrogen production system and improve the safety and reliability of the system.

[0130] 4. It is convenient for the selection and use of electrolytic power supply in combination with electrolytic hydrogen production equipment in the later stage, which is beneficial to the development of the industry.

[0131] In another aspect of the embodiments of the present application, there is also provided a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements each process of the protection control method embodiment of the above electrolytic power supply and can achieve the same technical effects. To avoid repetition, details are not described here again. Among them, the computer-readable storage medium is, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disc, etc.

[0132] In another aspect of the embodiments of the present application, there is also provided a computer program product, including a computer program. When the computer program is executed by a processor, it implements each process of the protection control method embodiment of the electrolytic power supply and can achieve the same technical effects. To avoid repetition, details are not described here again.

[0133] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0134] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disc) and includes several instructions for causing a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0135] The above are only specific embodiments 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 changes or substitutions within the technical scope disclosed in the present application, and all should be covered by 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 protection control method for an electrolytic power source, characterized in that: The method comprises: Obtaining the operating status of the electrolytic hydrogen production device and / or operating parameters of the electrolytic power supply; Determining a protection strategy according to the operating state of the electrolytic hydrogen production device and / or the operating parameters of the electrolytic power supply; The electrolysis power supply control device is controlled to execute the protection action corresponding to the protection strategy.

2. The protection control method for electrolytic power source according to claim 1, characterized in that: The electrolysis power supply control device includes an electrolysis power supply and control switches corresponding to each protection strategy; The controlling electrolysis power supply control device to execute the protection action corresponding to the protection strategy includes: A control signal is sent to the control switch corresponding to the protection strategy, and the control switch is turned on or off in response to the control signal. The electrolysis power supply performs a protection action corresponding to the protection strategy according to the state of the control switch.

3. The protection control method for electrolytic power source according to claim 1 or 2, characterized in that: Determining the protection strategy according to the operating state of the electrolytic hydrogen production device and / or the operating parameters of the electrolytic power supply includes: The level of the protection strategy is determined according to the operating state of the electrolytic hydrogen production device and / or the operating parameters of the electrolysis power supply; wherein the level of the protection strategy is obtained according to the degree of influence of the operating state and / or the operating parameters on the electrolytic hydrogen production device.

4. The protection control method for electrolytic power source according to claim 3, characterized in that: The protection action is to cut off the electrolysis power supply, and the thoroughness of the electrolysis power supply cutting corresponding to the protection strategies of different levels is different.

5. The protection and control method for electrolytic power source according to claim 1 or 2, characterized in that: Determine a protection strategy according to the operating state of the electrolytic hydrogen production device and / or the operating parameters of the electrolytic power supply, including at least one of the following: The first type: when an emergency occurs during the operation of the electrolytic hydrogen production device, a primary protection strategy is determined, and the protection action corresponding to the primary protection strategy is to cut off the circuit breaker of the electrolytic power supply; The second type: when the operating parameters of the electrolytic power supply during operation do not meet the first condition, a primary protection strategy is determined, and the protection action corresponding to the primary protection strategy is to cut off the circuit breaker of the electrolytic power supply.

6. The protection and control method for electrolytic power source according to claim 5, characterized in that: Determine a protection strategy according to the operating state of the electrolytic hydrogen production device and / or the operating parameters of the electrolytic power supply, including at least one of the following: The first type: when the electrolytic hydrogen production device fails during operation and the primary protection strategy is not triggered, a secondary protection strategy is determined, and the protection action corresponding to the secondary protection strategy is to cut off the output module of the electrolytic power supply; The second type: when the operating parameters of the electrolytic power supply do not meet the second condition during operation, a secondary protection strategy is determined, and the protection action corresponding to the secondary protection strategy is to cut off the output module of the electrolytic power supply.

7. The protection and control method for electrolytic power source according to claim 6, characterized in that: The determining of the protection strategy according to the operating state includes: When the hydrogen production conditions are not met during operation of the electrolysis hydrogen production device, and neither the first-level protection strategy nor the second-level protection strategy is triggered, a third-level protection strategy is determined; the protection action corresponding to the third-level protection strategy is to immediately cut off the control module of the electrolysis power supply and control the control module of the electrolysis power supply not to trigger a start signal.

8. The protection and control method for electrolytic power source according to claim 7, characterized in that: The determining of the protection strategy according to the operating state includes: When the electrolysis hydrogen production device does not meet the hydrogen production conditions in the remote working mode, and neither the first-level protection strategy nor the second-level protection strategy is triggered, the fourth-level protection strategy is determined; the protection action corresponding to the fourth-level protection strategy is to control the control module of the electrolysis power supply to slowly reduce the power supply output current value to 0A according to the load reduction rate, and control the electrolysis power supply to be in standby state.

9. A host computer, comprising a processor and a memory connected to the processor, characterized in that: The memory stores a computer program executable by the processor, and when the computer program is executed by the processor, the steps of the protection control method for an electrolytic power source as described in any one of claims 1 to 8 are implemented.

10. A hydrogen production system by electrolysis, characterized in that: It comprises an electrolysis power supply control device, an electrolysis hydrogen production device and a host computer as claimed in claim 9; The electrolysis power supply control device comprises an electrolysis power supply and a plurality of control switches corresponding to the protection strategy; the plurality of control switches and the electrolysis hydrogen production device are connected to the host computer; The host computer sends a control signal to the control switch corresponding to the protection strategy, and the control switch is turned on or off in response to the control signal. The electrolysis power supply performs a protection action corresponding to the protection strategy according to the state of the control switch.

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