Method, system and device for controlling flexible switching of electrolytic cell based on time sequence collaboration

Abstract

The invention discloses an electrolytic bath flexible switching control system, method and device based on time sequence collaboration, in the system, a voltage detection circuit is used for collecting the real-time voltage of a direct current bus, a main controller is used for receiving the real-time voltage, and when it is detected that the real-time voltage of the direct current bus is lower than the minimum voltage threshold value and the duration is met, the main controller is connected with the voltage detection circuit; controlling the output current of the power converter to be zero, outputting a relay closing instruction, and controlling the output current of the power converter to be continuously increased to a steady-state working value from zero according to a preset ramp function after a preset waiting period; continuous and smooth transition of zero current from zero to a set value is achieved, electrical and mechanical impact is thoroughly eliminated, material cost and complexity of the system are remarkably reduced, voltage impact of a direct-current bus is avoided, and stable operation of other devices in the system is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of power electronics technology, specifically to a method, system, and device for flexible switching control of electrolytic cells based on timing coordination. Background Technology

[0002] Currently, in the field of "green hydrogen" production, directly utilizing fluctuating renewable energy sources to drive electrolyzers is a key path to reduce hydrogen production costs. However, there is an inherent contradiction between the randomness of power supply and the rigid requirements for efficient and safe operation of electrolyzers. A common solution is to group electrolyzers and switch some of them into operation based on available power.

[0003] Existing switching technologies mainly suffer from two types of problems. 1. Direct hard switching: Directly connecting / disconnecting the electrolyzer via relays or contactors. At the moment of closing, this method can trigger a surge current of up to tens of times the rated current due to the electrolyzer's equivalent large capacitive load, leading to contact erosion, a sudden drop in bus voltage, a sharp reduction in equipment lifespan, and jeopardizing the purity and safety of hydrogen production. 2. Complex hardware buffering: Using pre-charge resistors, buffer circuits, or dedicated DC-DC converters for each branch to achieve soft start. While this method can suppress surges, it introduces additional power devices, heat dissipation costs, and space requirements, reducing system power density and cost-effectiveness, and making the circuit more complex. Summary of the Invention

[0004] To address the aforementioned shortcomings, this invention discloses a time-series coordinated flexible switching control method, system, and device for electrolytic cells, which enables flexible switching of electrolytic cells, ensuring continuous current without abrupt changes.

[0005] The first aspect of this invention discloses a time-coordinated flexible switching control system for electrolytic cells, comprising: a main controller, a voltage detection circuit, a DC bus, a DC power supply, a power converter, and at least one electrolytic cell branch controlled by a relay. The DC bus is connected to the DC power supply, and the power converter, voltage detection circuit, electrolytic cell branch, and relay are all connected to the DC bus. The voltage detection circuit, power converter, electrolytic cell branch, and relay are all connected to the main controller. The voltage detection circuit is used to collect the real-time voltage of the DC bus. The main controller is used to receive the real-time voltage and detect that the real-time voltage of the DC bus is lower than the minimum voltage threshold for a certain duration. When this threshold is lower than the threshold, the controller controls the output current of the power converter to be zero, outputs a relay closing command, and after the preset waiting period expires, controls the output current of the power converter to increase continuously from zero according to a preset ramp function until it reaches the steady-state operating value.

[0006] The second aspect of this invention discloses a time-coordinated flexible switching control method for electrolytic cells, which is applied to the time-coordinated flexible switching control system for electrolytic cells disclosed in the first aspect. Specifically, the method includes an electrolytic cell startup process, which includes: The voltage of the DC bus is collected in real time by a voltage detection circuit. It is determined whether the real-time voltage is lower than the minimum voltage threshold. When the real-time voltage collected continuously is lower than the minimum voltage threshold and the duration of the continuous collection of the real-time voltage meets the required duration, it is defined as meeting the voltage permissibility requirement. When the voltage is within acceptable limits, the output current of the power converter is controlled to be zero, and a closing command is sent to the relay corresponding to the electrolytic cell branch to enter a preset waiting period, and the output current of the power converter is controlled to remain zero during the waiting period. After the preset waiting period expires, the output current of the control power converter increases continuously from zero according to the preset ramp function until it reaches the steady-state operating value.

[0007] As an optional implementation, in a second aspect of the present invention, the duration of the waiting period is between 30ms and 150ms.

[0008] As an optional implementation, in a second aspect of the present invention, the minimum voltage threshold is 48V and the duration is 200ms.

[0009] As an optional implementation, in the second aspect of the present invention, it further includes: During or after a preset waiting period, the real-time voltage of the DC bus is continuously collected. When the collected real-time voltage is lower than a preset voltage threshold, the output current of the power converter is controlled to return to zero, and the relay is disconnected.

[0010] As an optional implementation, in a second aspect of the present invention, the current rise slope corresponding to the preset ramp function is from 5 A / s to 50 A / s.

[0011] As an optional implementation, in a second aspect of the present invention, an electrolytic cell shutdown process is further included, the electrolytic cell shutdown process comprising: The output current of the control power converter continuously decreases with a preset decreasing slope, aiming for zero amperes; The current output current of the power converter is detected, and when the current output current is detected to be lower than a preset safety disconnection threshold, a relay disconnection command is output to the relay.

[0012] The third aspect of this invention discloses a time-coordinated flexible electrolytic cell switching control device, which is also applied to the time-coordinated flexible electrolytic cell switching control system disclosed in the first aspect, including an electrolytic cell startup process, the electrolytic cell startup process including: Voltage acquisition module: used to acquire the real-time voltage of the DC bus through the voltage detection circuit, determine whether the real-time voltage is lower than the minimum voltage threshold, and define the voltage as permissible when the continuously acquired real-time voltage is lower than the minimum voltage threshold and the duration of continuous acquisition of the real-time voltage meets the duration requirement; Current adjustment module: When the voltage permitt is met, it controls the output current of the power converter to be zero and sends a closing command to the relay corresponding to the electrolytic cell branch to enter a preset waiting period, and controls the output current of the power converter to remain at zero during the waiting period. Current increase module: Used to control the output current of the power converter to continuously increase from zero to the steady-state operating value according to a preset ramp function after the preset waiting period expires.

[0013] As an optional implementation, in a third aspect of the present invention, the duration of the waiting period is between 30ms and 150ms.

[0014] As an optional implementation, in a third aspect of the present invention, the minimum voltage threshold is 48V and the duration is 200ms.

[0015] As an optional implementation, in a third aspect of the present invention, it further includes: During or after a preset waiting period, the real-time voltage of the DC bus is continuously collected. When the collected real-time voltage is lower than a preset voltage threshold, the output current of the power converter is controlled to return to zero, and the relay is disconnected.

[0016] As an optional implementation, in a third aspect of the present invention, the current rise slope corresponding to the preset ramp function is from 5 A / s to 50 A / s.

[0017] As an optional implementation, in a third aspect of the present invention, an electrolytic cell shutdown process is further included, the electrolytic cell shutdown process comprising: The output current of the control power converter continuously decreases with a preset decreasing slope, aiming for zero amperes; The current output current of the power converter is detected, and when the current output current is detected to be lower than a preset safety disconnection threshold, a relay disconnection command is output to the relay.

[0018] A fourth aspect of the present invention discloses an electronic device, comprising: a memory storing executable program code; a processor coupled to the memory; the processor calling the executable program code stored in the memory to execute the time-coordinated flexible switching control method for electrolytic cells disclosed in the second aspect of the present invention.

[0019] The fifth aspect of this invention discloses a computer-readable storage medium storing a computer program, wherein the computer program causes a computer to execute the time-coordinated flexible switching control method for electrolytic cells disclosed in the second aspect of this invention.

[0020] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: In this embodiment of the invention, the real-time voltage of the DC bus is monitored, and zero current is preset only when the voltage permittability condition is met. That is, the output current of the power converter is controlled to be zero. Then, the power converter output current is controlled to steadily increase from zero after the relay closes and the waiting period is met. This achieves a continuous and smooth transition from zero current to the set value, completely eliminating electrical and mechanical shocks. The lifespan of the relay is only limited by its mechanical lifespan, which improves the reliability of the entire system by orders of magnitude. The timing algorithm of this embodiment has near-zero marginal cost, completely replacing traditional pre-charge resistors, buffer circuits and other hardware, significantly reducing the material cost and complexity of the system. At the same time, it avoids voltage surges on the DC bus, ensuring the stable operation of other equipment in the system. The electrolytic cell is always started and stopped under controlled conditions, which is conducive to improving the overall energy efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a module structure diagram of a time-coordinated flexible switching control system for electrolytic cells disclosed in an embodiment of the present invention; Figure 2 This is a flowchart illustrating a time-coordinated flexible switching control method for electrolytic cells disclosed in an embodiment of the present invention. Figure 3 This is a schematic flowchart of the electrolytic cell shutdown process disclosed in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a time-coordinated flexible electrolytic cell switching control device provided in an embodiment of the present invention; Figure 5This is a schematic diagram of another module structure of a time-coordinated flexible switching control device for electrolytic cells provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] It should be noted that the terms "first," "second," "third," "fourth," etc., in the specification and claims of this invention are used to distinguish different objects, not to describe a specific order. The terms "comprising" and "having," and any variations thereof, in the embodiments of this invention are intended to cover non-exclusive inclusion. Exemplarily, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0025] This invention discloses a timing-based flexible switching control system, method, apparatus, electronic device, and storage medium for electrolytic cells. By monitoring the real-time voltage of the DC bus, zero current is preset only when the voltage permissible condition is met, i.e., the output current of the power converter is controlled to be zero. Then, after the relay is closed and the waiting period is met, the output current of the power converter is controlled to steadily increase from zero, achieving a continuous and smooth transition from zero current to the set value. This completely eliminates electrical and mechanical shocks, and the lifespan of the relay is limited only by its mechanical lifespan, resulting in an order-of-magnitude improvement in the reliability of the entire system. The timing algorithm of this embodiment has near-zero marginal cost, completely replacing traditional pre-charge resistors, buffer circuits, and other hardware, significantly reducing the material cost and complexity of the system. At the same time, it avoids voltage surges on the DC bus, ensuring the stable operation of other equipment in the system. The electrolytic cell is always started and stopped under controlled conditions, which is conducive to improving overall energy efficiency.

[0026] Example 1 Please see Figure 1 , Figure 1This is a schematic diagram of the module structure of a time-coordinated flexible electrolytic cell switching control system disclosed in an embodiment of the present invention. Specifically, the flexible electrolytic cell switching control system includes a main controller, a voltage detection circuit, a DC bus, a DC power supply, a power converter, and at least one electrolytic cell branch controlled by a relay.

[0027] The DC power supply is a fluctuating DC power supply. The main power converter has an analog control interface that accepts current commands from the main controller. Each electrolytic cell branch includes a relay controlled by a digital drive signal from the main controller and an electrolytic cell; there is at least one electrolytic cell branch. A voltage detection circuit connects to the DC bus and the main controller, which is connected to the aforementioned components to execute a timing-coordinated control method.

[0028] Specifically, the voltage detection circuit is used to collect the real-time voltage of the DC bus. The main controller is used to receive the real-time voltage and detect that the real-time voltage of the DC bus is lower than the minimum voltage threshold for a certain duration. When this threshold is lower than the threshold, the controller controls the output current of the power converter to be zero, outputs a relay closing command, and after the preset waiting period expires, controls the output current of the power converter to increase continuously from zero according to a preset ramp function until it reaches the steady-state operating value.

[0029] The core objective of this implementation is to eliminate external pre-charging hardware. By designing and rigorously executing a set of precise collaborative timing logic embedded in the main controller, the standard power converter, relays, and electrolytic cell are precisely coordinated in the time dimension. This ultimately achieves "flexible" switching of the electrolytic cell, meaning continuous current without abrupt changes, thereby eliminating the surge current problem at minimal additional cost. The implementation includes startup and shutdown processes in its entire control flow, which is a multi-stage, time-constrained collaborative control process.

[0030] The embodiment achieves a continuous and smooth transition of current from zero to the set value through the coordinated timing of zero-current preset, arc-free closure, mechanical stability, and ramp start, completely eliminating electrical and mechanical shocks. The relay lifespan is limited only by its mechanical lifespan, resulting in an order-of-magnitude improvement in system reliability. The intelligent timing algorithm, a near-zero marginal cost software solution, completely replaces traditional hardware such as pre-charge resistors and buffer circuits, significantly reducing system material costs and complexity while achieving advanced soft-start functionality. It also avoids bus voltage surges, ensuring the stable operation of other equipment within the system. The electrolyzer is always started and stopped under controlled conditions, which helps maintain hydrogen purity and improve overall energy efficiency. The coordinated timing parameters (such as duration, waiting period, and current rise rate) can be flexibly configured through software, easily adapting to different models of relays and electrolyzers. This framework is easily extended to complex rotation and power allocation strategies for multiple electrolyzers.

[0031] Example 2 Please see Figure 2and Figure 3 , Figure 2 and Figure 3 This is a flowchart illustrating the time-coordinated flexible switching control method for electrolytic cells disclosed in this invention. The execution entity of the method described in this embodiment is a software and / or hardware entity that can receive relevant information and send certain instructions via wired or / or wireless means. It may also have processing and storage functions. This entity can control multiple devices, such as remote physical servers or cloud servers and related software, or local hosts or servers and related software that perform operations on devices located in a specific location. In some scenarios, it can also control multiple storage devices, which may be located in the same or different locations as the devices. Figure 2 and Figure 3 As shown, the flexible switching control method for electrolyzers based on time-series coordination includes the following steps: 201. The real-time voltage of the DC bus is acquired in real time through a voltage detection circuit. It is determined whether the real-time voltage is lower than the minimum voltage threshold. When the real-time voltage acquired continuously is lower than the minimum voltage threshold and the duration of the continuous acquisition of the real-time voltage meets the required duration, it is defined as meeting the voltage permissibility requirement.

[0032] This step, also known as the voltage permission stage, primarily monitors the DC bus voltage. Only when the voltage consistently exceeds the minimum operating voltage threshold of the electrolytic cell and reaches the first time window (i.e., the required duration) is the power supply side deemed ready to proceed to the next stage. This stage ensures that switching operations are performed only when the system voltage is stable. Preferably, the minimum voltage threshold is 48V, and the duration is 200ms.

[0033] 202. When the voltage permittivity is met, the output current of the power converter is controlled to be zero, and a closing command is sent to the relay corresponding to the electrolytic cell branch to enter a preset waiting period, and the output current of the power converter is controlled to remain zero during the waiting period.

[0034] This step, also known as the zero-current preset stage and the arc-free closing and mechanical stabilization stage, involves controlling the analog control interface of the power converter before issuing any relay action command. This presets the output current command to zero, creating the electrical conditions for subsequent "zero-current switching." A closing drive signal is then issued for the target electrolytic cell branch relay. Subsequently, the system enters a preset mechanical stabilization waiting period. During this waiting period, the power converter maintains zero-current output. The design purpose of this stage is to ensure that the relay contacts complete physical closure in a current-free state, completely avoiding arcing; and to provide sufficient mechanical relaxation time for the relay contacts to eliminate bounce and achieve stable low-resistance contact. Preferably, the waiting period is between 30ms and 150ms.

[0035] 203. After the preset waiting period expires, the output current of the control power converter will increase continuously from zero according to the preset ramp function until the steady-state operating value is reached.

[0036] This stage is the flexible ramp-up stage. After the mechanical stabilization waiting period, it is confirmed that the relay has been reliably closed. At this time, the main controller controls the analog control interface of the power converter, causing its output command to increase continuously and monotonically from zero according to a predetermined ramp function. For example, the corresponding output current increases at an adjustable slope of 5A / s to 50A / s until the preset steady-state operating point is reached.

[0037] During or after a preset waiting period, the real-time voltage of the DC bus is continuously collected. When the collected real-time voltage is lower than a preset voltage threshold, the output current of the power converter is controlled to return to zero, and the relay is disconnected.

[0038] The next stage is steady-state operation. The system switches to closed-loop control mode to maintain efficient and stable operation of the electrolyzer.

[0039] Combination Figure 3 The embodiment also includes an electrolytic cell shutdown process, which includes: 301. Control the output current of the power converter to continuously decrease with a preset decreasing slope, aiming for zero amperes; 302. Detect the current output current of the power converter, and when the current output current is detected to be lower than the preset safety disconnection threshold, output a relay disconnection command to the relay.

[0040] This includes a flexible ramp-down current reduction phase, where the power converter is controlled to smoothly reduce its output current to near zero amperes at a preset slope; a zero-current confirmation phase, where the actual output current is detected and confirmed to be below the safe disconnection threshold (e.g., <1A); an arc-free disconnection phase, where a relay disconnection command is issued. Since the current flowing through the contacts is almost zero at this point, arc-free disconnection is achieved again; and finally, a state reset phase, where the system returns to standby mode.

[0041] Example 3 Please see Figure 4 , Figure 4 This is a schematic diagram of the structure of a flexible electrolytic cell switching control device based on time-coordination, as disclosed in an embodiment of the present invention. Figure 4As shown, the time-coordinated flexible switching control device for electrolytic cells may include: a voltage acquisition module 401, a current adjustment module 402, and a current increase module 403. The voltage acquisition module 401 is used to acquire the real-time voltage of the DC bus through a voltage detection circuit, determine whether the real-time voltage is lower than a minimum voltage threshold, and define a voltage permitt as met when the continuously acquired real-time voltages are all lower than the minimum voltage threshold and the duration of continuous acquisition of the real-time voltage meets the required duration. The current adjustment module 402 is used to control the output current of the power converter to zero when the voltage permitt is met, and send a closing command to the relay corresponding to the electrolytic cell branch to enter a preset waiting period, and control the output current of the power converter to remain zero during the waiting period. The current increase module 403 is used to control the output current of the power converter to continuously increase from zero to a steady-state operating value according to a preset ramp function after the preset waiting period expires.

[0042] Furthermore, the waiting period is between 30ms and 150ms; the minimum voltage threshold is 48V, and the duration is 200ms.

[0043] like Figure 5 As shown, the embodiment also includes a ramp-down current reduction module 404 and an arc-free disconnect module 405. The ramp-down current reduction module 404 is used to control the output current of the power converter to continuously decrease at a preset ramp rate with a target of zero amperes. The arc-free disconnect module 405 is used to detect the current output current of the power converter, and when the current output current is detected to be lower than a preset safe disconnection threshold, it outputs a relay disconnection command to the relay.

[0044] Example 4 Please see Figure 6 Figure 1.0 is a schematic diagram of the structure of an electronic device disclosed in an embodiment of the present invention. The electronic device can be a computer, a server, etc. Of course, under certain circumstances, it can also be a mobile phone, a tablet computer, a monitoring terminal, or other smart devices, as well as an image acquisition device with processing capabilities. As shown in Figure 1.0, the electronic device may include: Memory 601 storing executable program code; Processor 602 coupled to memory 601; In this process, the processor 602 calls the executable program code stored in the memory 601 to execute some or all of the steps in the time-coordinated flexible switching control method for electrolytic cells in Embodiment 2.

[0045] This invention discloses a computer-readable storage medium storing a computer program that enables a computer to perform some or all of the steps in the time-coordinated flexible switching control method for electrolytic cells in Embodiment 2.

[0046] This invention also discloses a computer program product, wherein when the computer program product is run on a computer, the computer executes some or all of the steps in the time-coordinated flexible switching control method for electrolytic cells in Embodiment 2.

[0047] This invention also discloses an application publishing platform, which is used to publish computer program products. When the computer program products are run on a computer, the computer executes some or all of the steps in the time-coordinated flexible switching control method for electrolytic cells in Embodiment 2.

[0048] In various embodiments of the present invention, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0049] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; they can be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0050] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0051] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-accessible memory. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a memory and includes several requests to cause a computer device (which can be a personal computer, server, or network device, specifically a processor in the computer device) to execute some or all of the steps of the methods described in the various embodiments of the present invention.

[0052] In the embodiments provided by this invention, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean determining B solely based on A; B can also be determined based on A and / or other information.

[0053] Those skilled in the art will understand that some or all of the steps in the various methods of the embodiments described can be implemented by a program instructing related hardware. This program can be stored in a computer-readable storage medium, including read-only memory (ROM), random access memory (RAM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), one-time programmable read-only memory (OTPROM), electrically-Erasable Programmable Read-Only Memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, disk storage, magnetic tape storage, or any other computer-readable medium capable of carrying or storing data.

[0054] The above provides a detailed description of the time-coordinated flexible switching control system, method, apparatus, electronic device, and storage medium for electrolytic cells disclosed in the embodiments of the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A flexible switching control system for electrolytic cells based on time-series coordination, characterized in that, include: The system includes a main controller, a voltage detection circuit, a DC bus, a DC power supply, a power converter, and at least one electrolytic cell branch controlled by a relay. The DC bus is connected to the DC power supply, and the power converter, voltage detection circuit, electrolytic cell branch, and relay are all connected to the DC bus. The voltage detection circuit, power converter, electrolytic cell branch, and relay are all connected to the main controller. The voltage detection circuit is used to collect the real-time voltage of the DC bus. The main controller is used to receive the real-time voltage and detect that the real-time voltage of the DC bus is lower than the minimum voltage threshold for a certain duration. When this threshold is lower than the threshold, the controller controls the output current of the power converter to be zero, outputs a relay closing command, and after the preset waiting period expires, controls the output current of the power converter to increase continuously from zero according to a preset ramp function until it reaches the steady-state operating value.

2. A time-coordinated flexible switching control method for electrolytic cells applied to the flexible switching control system of the electrolytic cell as described in claim 1, characterized in that, The process includes an electrolytic cell startup procedure, which includes: The voltage of the DC bus is collected in real time by a voltage detection circuit. It is determined whether the real-time voltage is lower than the minimum voltage threshold. When the real-time voltage collected continuously is lower than the minimum voltage threshold and the duration of the continuous collection of the real-time voltage meets the required duration, it is defined as meeting the voltage permissibility requirement. When the voltage is within acceptable limits, the output current of the power converter is controlled to be zero, and a closing command is sent to the relay corresponding to the electrolytic cell branch to enter a preset waiting period, and the output current of the power converter is controlled to remain zero during the waiting period. After the preset waiting period expires, the output current of the control power converter increases continuously from zero according to the preset ramp function until it reaches the steady-state operating value.

3. The flexible switching control method for electrolytic cells according to claim 2, characterized in that, The duration of the waiting period is between 30ms and 150ms.

4. The flexible switching control method for electrolytic cells according to claim 2, characterized in that, The minimum voltage threshold is 48V, and the duration is 200ms.

5. The flexible switching control method for electrolytic cells according to claim 2, characterized in that, Also includes: During or after a preset waiting period, the real-time voltage of the DC bus is continuously collected. When the collected real-time voltage is lower than a preset voltage threshold, the output current of the power converter is controlled to return to zero, and the relay is disconnected.

6. The flexible switching control method for electrolytic cells according to claim 2, characterized in that, The current rise slope corresponding to the preset ramp function is from 5 A / s to 50 A / s.

7. The flexible switching control method for electrolytic cells according to claim 2, characterized in that, It also includes an electrolytic cell shutdown process, which includes: The output current of the control power converter continuously decreases with a preset decreasing slope, aiming for zero amperes; The current output current of the power converter is detected, and when the current output current is detected to be lower than a preset safety disconnection threshold, a relay disconnection command is output to the relay.

8. A time-coordinated flexible switching control device for an electrolytic cell, applied to the flexible switching control system of the electrolytic cell as described in claim 1, characterized in that, The process includes an electrolytic cell startup procedure, which includes: Voltage acquisition module: used to acquire the real-time voltage of the DC bus through the voltage detection circuit, determine whether the real-time voltage is lower than the minimum voltage threshold, and define the voltage as permissible when the continuously acquired real-time voltage is lower than the minimum voltage threshold and the duration of continuous acquisition of the real-time voltage meets the duration requirement; Current adjustment module: When the voltage permitt is met, it controls the output current of the power converter to be zero and sends a closing command to the relay corresponding to the electrolytic cell branch to enter a preset waiting period, and controls the output current of the power converter to remain at zero during the waiting period. Current increase module: Used to control the output current of the power converter to continuously increase from zero to the steady-state operating value according to a preset ramp function after the preset waiting period expires.

9. An electronic device, characterized in that, include: Memory containing executable program code; A processor coupled to the memory; The processor calls the executable program code stored in the memory to execute the time-coordinated flexible switching control method for electrolytic cells as described in any one of claims 2 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, wherein the computer program causes a computer to execute the time-coordinated flexible switching control method for electrolytic cells as described in any one of claims 2 to 7.

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