Control method and device for electrolytic bath cluster in green electricity hydrogen production system

Abstract

The invention relates to a control method and device for an electrolytic cell cluster in a green electricity hydrogen production system, and is applied to the technical field of energy electric power. If the Pin (t) is smaller than N (t-1) Pmin-hard, carrying out calculation; according to the Pmin-hard and the Pin (t), the electrolytic cell which is started at the previous moment is controlled; if Pin (t) is greater than or equal to N (t-1) Pmin-hard and less than N (t-1) Pmin-soft, calculating an accumulated value of a difference value between Pmin-soft and the running power of the electrolytic cell when each started electrolytic cell runs below Pmin-soft in K historical periods at the previous moment; according to the accumulated value, the Pin (t) and the Pmin-soft, the electrolytic cell which is started at the previous moment is controlled; if Pin (t) is larger than or equal to N (t-1) Pmin-soft and smaller than or equal to N (t-1) Pmax-soft, the start-stop state of the electrolytic cells in the electrolytic cell cluster is controlled to be unchanged, and Pin (t) is averagely distributed to the started electrolytic cells; if Pin (t) is greater than N (t-1) Pmax-soft, calculating an accumulated value of a difference value between the running power of the electrolytic cell and Pmax-soft when each started electrolytic cell runs above Pmax-soft in K historical periods at the previous moment; and controlling the electrolytic cell cluster according to the accumulated value, the Pin (t) and the Pmax-soft. The stability of system operation can be improved.

Description

Technical Field

[0001] The present application relates to the field of energy and power technology, and in particular to a control method and device for an electrolyzer cluster in a green electricity hydrogen production system. Background Art

[0002] "Green chemistry" is the trend of sustainable development of the chemical industry in the future. Use renewable energy sources such as wind power and photovoltaics to generate electricity, and then input the "green electricity" produced into the electrolyzer to produce "green hydrogen" through water electrolysis. As a clean energy carrier, hydrogen can not only replace traditional fossil fuels and reduce greenhouse gas emissions, but also be used as a chemical raw material to promote the low-carbon transformation of the entire industry.

[0003] However, the inherent intermittency and instability of wind and photovoltaic power generation pose challenges to the production of "green hydrogen". The output power of these renewable energy sources is greatly affected by natural factors. For example, changes in wind speed and light intensity can cause power generation to jump from zero to full load in a very short time, or drop rapidly. This high volatility requires that the "green hydrogen" production system, especially the electrolyzer, must have excellent adaptability and flexibility to quickly respond to changes in power supply and ensure the continuous and stable production of hydrogen. In order to overcome this problem, it is first necessary to improve the adaptability of the electrolyzer to changes in upstream power supply. Although the electrolyzer is designed with a certain degree of adjustment capability, its operating load range is often strictly limited for safety reasons. For example, the alkaline electrolyzer widely used in large-scale hydrogen production projects is usually limited to a minimum operating load of 20%-25% of its maximum capacity. This is because when the ratio of hydrogen to oxygen exceeds a certain threshold, a potentially explosive mixture may be formed, and the system must be stopped immediately to avoid danger.

[0004] In the related art, the maximum and minimum operating powers are set as hard constraints for the safe operation of the electrolyzer. Although this conservative operation strategy helps prevent accidents, it may cause unnecessary shutdown of running electrolyzers or startup of non-running electrolyzers. Especially under the production conditions of green power systems, frequent fluctuations in upstream wind and solar power output may cause frequent shutdowns and starts, which will not only lead to waste of resources and increase operating costs, but may also damage the performance of the electrolyzer itself and shorten the service life of the equipment. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides a control method, device, electronic device and storage medium for an electrolyzer cluster in a green electricity hydrogen production system.

[0006] According to a first aspect of the present application, a control method for an electrolyzer cluster in a green electricity hydrogen production system is provided, comprising:

[0007] Periodically obtain wind and solar power output;

[0008] Determine whether the wind and solar power output at the current time t is less than N(t-1)P min-soft ;P min-soft represents the lower limit of the soft constraint power; N(t-1) represents the number of electrolyzers that have been turned on in the electrolyzer cluster at the previous moment t-1;

[0009] If the wind and solar power output is less than N(t-1)P min-soft , determine whether the wind and solar power output is less than N(t-1)P min-hard ;P min-hard represents the hard constraint power lower limit; P min-hard <P min-soft ;

[0010] If the wind and solar power output is less than N(t-1)P min-hard , according to the hard constraint power lower limit and the wind and solar power output power, the electrolyzer that has been turned on at the previous moment is controlled;

[0011] If the wind and solar power output is greater than or equal to N(t-1)P min-hard , for each electrolytic cell that has been turned on at the previous moment, calculate the electrolytic cell in P in the historical K cycles min-soft When running as follows, P min-soft The accumulated value of the difference between the operating power of the electrolytic cell and the operating power of the electrolytic cell is used to obtain a low power accumulated value;

[0012] Controlling the electrolyzer that was turned on at the previous moment according to the low power accumulated value, the wind and solar power output power and the soft constraint power lower limit;

[0013] If the wind and solar power output is greater than or equal to N(t-1)P min-soft , determine whether the wind and solar power output is greater than N(t-1)P max-soft , P max-soft Indicates the soft constraint power upper limit;

[0014] If the wind and solar power output is less than or equal to N(t-1)P max-soft , then the start and stop states of the electrolyzers in the electrolyzer cluster are controlled to remain unchanged, and the wind and solar power output is evenly distributed to the electrolyzers that have been turned on;

[0015] If the wind and solar power output is greater than N(t-1)P max-soft , for each electrolytic cell that has been turned on at the previous moment, calculate the electrolytic cell in P in the historical K cycles max-soft When the above operation is performed, the operating power of the electrolytic cell is P max-soft The accumulated value of the difference between the high power and the low power is obtained;

[0016] The electrolyzer cluster is controlled according to the high power accumulated value, the wind and solar power output power and the soft constraint power upper limit.

[0017] Optionally, controlling the electrolyzer that was turned on at the previous moment according to the low power cumulative value, the wind and solar power output power and the soft constraint power lower limit includes:

[0018] Assume that the low power accumulated value of the i-th opened electrolyzer is P m i in (t-1), the maximum power difference between a single electrolytic cell and the soft constraint power lower limit is P min ;

[0019] if Then the start and stop states of the electrolytic cells in the electrolytic cell cluster are controlled to remain unchanged;

[0020] According to the following formula:

[0021] Determine the power P of the i-th activated electrolytic cell i (t), and controlling the electrolytic cell to operate at a corresponding power;

[0022] in,

[0023] if Then the low power accumulated values ​​of the electrolytic cells that were turned on at the previous moment are sorted from large to small and shut down in sequence until the low power accumulated values ​​are met. N(t) represents the number of electrolytic cells that are turned on in the electrolytic cell cluster at the current time t, P in (t) represents the wind and solar power output at the current time t;

[0024] According to the following formula:

[0025] Determine the power P of the i-th activated electrolytic cell i (t), and controlling the electrolytic cell to operate at a corresponding power.

[0026] Optionally, controlling the electrolyzer that has been turned on at the previous moment according to the hard constraint power lower limit and the wind and solar power output power includes:

[0027] Determine the number of electrolyzers to be turned on at the current moment based on the wind and solar power output and the hard-constrained power lower limit;

[0028] The difference between the number of electrolytic cells that were turned on at the previous moment and the number of electrolytic cells to be turned on at the current moment is determined as the number of electrolytic cells to be shut down at the current moment, N. - ;

[0029] Control the N in the electrolytic cell that was turned on at the previous moment - The electrolytic cells are shut down, and the remaining electrolytic cells that are turned on are used as the electrolytic cells that are turned on at the current moment;

[0030] The wind and solar power output is evenly distributed to the electrolyzers that are currently turned on, and each electrolyzer that is currently turned on is controlled to operate according to the corresponding power.

[0031] Optionally, determining the number of electrolyzers to be turned on at the current moment according to the wind and solar power output and the hard constraint power lower limit includes:

[0032] According to the following formula: Determine the number of electrolytic cells N(t) to be opened at the current moment, Indicates rounding down.

[0033] Optionally, controlling the electrolyzer cluster according to the high power cumulative value, the wind and solar power output power and the soft constraint power upper limit includes:

[0034] Assume that the high power accumulated value of the i-th activated electrolyzer is The maximum power difference corresponding to a single electrolyzer is

[0035] if Start a new electrolytic cell and set the power of the newly started electrolytic cell to P start ;

[0036] According to the following formula:

[0037]

[0038] Determine the power P of the other i-th electrolytic cell that has been turned on i (t), and control the electrolytic cell to operate according to the corresponding power; wherein i=1, ..., N(t)-1, P max-hard represents the hard power limit,

[0039] if Then the start and stop states of the electrolytic cells in the electrolytic cell cluster are controlled to remain unchanged;

[0040] According to the following formula:

[0041] Determine the power P of the i-th activated electrolytic cell i (t), and control the electrolytic cell to operate according to the corresponding power; wherein, i=1,...,N(t)-1.

[0042] According to a second aspect of the present application, a control device for an electrolyzer cluster in a green electricity hydrogen production system is provided, comprising:

[0043] A wind and solar power output acquisition module is used to periodically acquire wind and solar power output;

[0044] The first judgment module is used to judge whether the wind and solar power output at the current time t is less than N(t-1)P min-soft ;P min-soft represents the lower limit of the soft constraint power; N(t-1) represents the number of electrolyzers that have been turned on in the electrolyzer cluster at the previous moment t-1;

[0045] The second judgment module is used to determine that the wind and solar power output is less than N(t-1)P min-soft , determine whether the wind and solar power output is less than N(t-1)P min-hard ;P min-hard represents the hard constraint power lower limit; P min-hard <P min-soft ;

[0046] The first control module is used for determining that the wind and solar power output is less than N(t-1)P if the second judgment module determines that the wind and solar power output is less than N(t-1)P min-hard , according to the hard constraint power lower limit and the wind and solar power output power, the electrolyzer that has been turned on at the previous moment is controlled;

[0047] The second control module is used to determine that the wind and solar power output is greater than or equal to N(t-1)P min-hard , for each electrolytic cell that has been turned on at the previous moment, calculate the electrolytic cell in P in the historical K cycles min-soft When running as follows, P min-soft The accumulated value of the difference between the operating power of the electrolyzer and the operating power of the electrolyzer is used to obtain a low power accumulated value; and the electrolyzer that has been turned on at the previous moment is controlled according to the low power accumulated value, the wind and solar power output power and the soft constraint power lower limit;

[0048] The third judgment module is used to determine that the wind and solar power output is greater than or equal to N(t-1)P if the first judgment module determines that the wind and solar power output is greater than or equal to N(t-1)P min-soft , determine whether the wind and solar power output is greater than N(t-1)P max-soft , P max-soft Indicates the soft constraint power upper limit;

[0049] The third control module is used to determine that the wind and solar power output is less than or equal to N(t-1)P max-soft , then the start and stop states of the electrolyzers in the electrolyzer cluster are controlled to remain unchanged, and the wind and solar power output is evenly distributed to the electrolyzers that have been turned on;

[0050] The fourth control module is used for determining that the wind and solar power output is greater than N(t-1)P if the third judgment module determines that the wind and solar power output is greater than N(t-1)P max-soft , for each electrolytic cell that has been turned on at the previous moment, calculate the electrolytic cell in P in the historical K cycles max-soft When the above operation is performed, the operating power of the electrolytic cell is P max-soft The accumulated value of the difference between and is used to obtain a high power accumulated value; and the electrolyzer cluster is controlled according to the high power accumulated value, the wind and solar power output power and the soft constraint power upper limit.

[0051] Optionally, the second control module is specifically configured to control the electrolyzer that has been turned on at the previous moment according to the low power cumulative value, the wind and solar power output power and the soft constraint power lower limit through the following steps:

[0052] Assume that the low power accumulated value of the i-th activated electrolyzer is The maximum power difference between a single electrolyzer and the soft constraint power lower limit is

[0053] if Then the start and stop states of the electrolytic cells in the electrolytic cell cluster are controlled to remain unchanged;

[0054] According to the following formula:

[0055] Determine the power P of the i-th activated electrolytic cell i (t), and controlling the electrolytic cell to operate at a corresponding power;

[0056] in,

[0057] if Then the low power accumulated values ​​of the electrolytic cells that were turned on at the previous moment are sorted from large to small and shut down in sequence until the low power accumulated values ​​are met. N(t) represents the number of electrolytic cells that are turned on in the electrolytic cell cluster at the current time t, P in (t) represents the wind and solar power output at the current time t;

[0058] According to the following formula:

[0059] Determine the power P of the i-th activated electrolytic cell i (t), and controlling the electrolytic cell to operate at a corresponding power.

[0060] Optionally, the first control module is specifically used to determine the number of electrolytic cells to be turned on at the current moment according to the wind and solar output power and the hard constraint power lower limit if the second judgment module determines that the wind and solar output power is less than N(t-1)Pmin-hard; the difference between the number of electrolytic cells turned on at the previous moment and the number of electrolytic cells to be turned on at the current moment is determined as the number of electrolytic cells to be shut down at the current moment. - ; Control the N in the electrolytic cell that was turned on at the previous moment - The electrolyzers are shut down, and the remaining electrolyzers are used as the electrolyzers that are currently turned on; the wind and solar power output is evenly distributed to the electrolyzers that are currently turned on, and each electrolyzer that is currently turned on is controlled to operate according to the corresponding power.

[0061] Optionally, the first control module is specifically configured to determine the number of electrolyzers to be turned on at the current moment according to the wind and solar power output power and the hard constraint power lower limit through the following steps:

[0062] According to the following formula: Determine the number of electrolytic cells N(t) to be opened at the current moment, Indicates rounding down.

[0063] Optionally, the fourth control module is specifically configured to control the electrolyzer cluster according to the high power cumulative value, the wind and solar power output power and the soft constraint power upper limit through the following steps:

[0064] Assume that the high power accumulated value of the i-th activated electrolyzer is The maximum power difference corresponding to a single electrolyzer is

[0065] if Start a new electrolytic cell and set the power of the newly started electrolytic cell to Pstart;

[0066] According to the following formula:

[0067]

[0068] Determine the power P of the other i-th electrolytic cell that has been turned on i (t), and control the electrolytic cell to operate according to the corresponding power; wherein i=1, ..., N(t)-1, P max-hard represents the hard power limit,

[0069] if Then the start and stop states of the electrolytic cells in the electrolytic cell cluster are controlled to remain unchanged;

[0070] According to the following formula:

[0071] Determine the power P of the i-th activated electrolytic cell i (t), and control the electrolytic cell to operate according to the corresponding power; wherein, i=1,...,N(t)-1.

[0072] According to a third aspect of the present application, an electronic device is provided, comprising: a processor, wherein the processor is configured to execute a computer program stored in a memory, wherein the computer program implements the method described in the first aspect when executed by the processor.

[0073] According to a fourth aspect of the present application, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the method described in the first aspect is implemented.

[0074] According to a fifth aspect of the present application, a computer program product is provided. When the computer program product is run on a computer, the computer is enabled to execute the method described in the first aspect.

[0075] Compared with the prior art, the technical solution provided by the embodiments of the present application has the following advantages:

[0076] By setting soft constraints and hard constraints in advance, when the operating power of the electrolyzer cannot meet the soft constraints, it will not be started or stopped immediately, but allowed to exceed the soft constraints within a certain range. At the same time, the cumulative value of the electrolyzer's power exceeding the limit in the past period of time is recorded, and the cumulative value of the power exceeding the limit is used as a measurement indicator. The cluster power is allocated according to the cumulative value of the power exceeding the limit of each electrolyzer. In this way, the upper and lower limits of the electrolyzer power in the electrolyzer cluster control can be effectively expanded, thereby effectively alleviating the problem of frequent start and stop of the electrolyzer when the upstream wind and solar power output fluctuates greatly in the green system. While ensuring the safe operation of the system, it effectively improves the stability of the system operation and the efficiency of green hydrogen production, and realizes flexible control of the electrolyzer cluster, which has strong practical value for the actual green electricity hydrogen production system. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0078] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0079] Figure 1A flow chart of a control method for an electrolyzer cluster in a green electricity hydrogen production system in an embodiment of the present application;

[0080] Figure 2 A schematic diagram of the structure of a control device for an electrolyzer cluster in a green electricity hydrogen production system in an embodiment of the present application;

[0081] Figure 3 A schematic diagram of the structure of an electronic device in an embodiment of the present application. DETAILED DESCRIPTION

[0082] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0083] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present application, rather than all of the embodiments.

[0084] Figure 1 This is a flow chart of a control method for an electrolyzer cluster in a green electricity hydrogen production system in an embodiment of the present application, which may include the following steps:

[0085] Step S102, periodically obtaining wind and solar power output.

[0086] The wind and solar power output is greatly affected by natural factors and is unstable. The control method of the electrolyzer cluster will be different for different wind and solar power outputs. Therefore, the wind and solar power output can be obtained periodically, and the electrolyzer cluster can be controlled based on different wind and solar power outputs. That is, the control method of the electrolyzer cluster in the embodiment of the present application can be performed periodically.

[0087] Step S104: determine whether the wind and solar power output at the current time t is less than N(t-1)P min-soft .

[0088] Assume that the electrolytic cell cluster contains N0 electrolytic cells, N(t-1) represents the number of electrolytic cells that have been turned on in the electrolytic cell cluster at the previous moment t-1, and N(t-1) is less than or equal to N0. min-soft represents the soft constraint power lower limit. Therefore, N(t-1)P min-soft It can be used to determine whether the wind and solar power output at the current time t meets the power demand of the electrolyzer that has been turned on. If the wind and solar power output is less than N(t-1)P min-soft , indicating that the wind power output does not meet the soft constraint lower limit, execute step S106; if the wind power output is greater than or equal to N(t-1)Pmin-soft , indicating that the wind and solar power output meets the lower limit of the soft constraint, and step S114 is executed.

[0089] Step S106: determine whether the wind and solar power output at the current time t is less than N(t-1)P min-hard .

[0090] Furthermore, if the wind and solar power output is less than N(t-1)P min-hard , indicating that the wind power output does not meet the hard constraint lower limit, execute step S108; if the wind power output is greater than or equal to N(t-1)P min-hard , indicating that the wind and solar power output meets the hard constraint lower limit but does not meet the soft constraint lower limit, and step S110 is executed. min-hard represents the hard power limit, P min-hard <P min-soft .

[0091] Step S108, controlling the electrolyzer that was turned on at the previous moment according to the hard constraint power lower limit and the wind and solar power output.

[0092] When the wind and solar power output does not meet the hard constraint lower limit, it means that when allocating power according to the number of electrolyzers that were turned on at the previous moment, the wind and solar power output is small and does not meet the hard constraint lower limit. Therefore, some of the electrolyzers can be shut down and the wind and solar power output can be allocated to the remaining electrolyzers that are turned on.

[0093] Optionally, the number of electrolyzers to be turned on at the current moment can be determined based on the wind and solar power output and the hard constraint power lower limit. For example, the following formula can be used: Determine the number of electrolytic cells N(t) to be opened at the current moment, In this way, it can be ensured that each electrolytic cell to be turned on meets the hard constraint lower limit requirement, and the number of electrolytic cells turned on is kept at a maximum. Afterwards, the difference between the number of electrolytic cells turned on at the previous moment and the number of electrolytic cells to be turned on at the current moment is determined as the number of electrolytic cells to be shut down at the current moment, N. - ; Control the N in the electrolytic cell that was turned on at the previous moment - The electrolyzers are shut down, and the remaining electrolyzers are used as the electrolyzers that are currently turned on. The wind and solar power output is evenly distributed to the electrolyzers that are currently turned on, and each electrolyzer that is currently turned on is controlled to operate according to the corresponding power.

[0094] Step S110, for each electrolytic cell that has been turned on at the previous moment, calculate the electrolytic cell in P in the historical K cycles min-soft When running as follows, P min-soft The accumulated value of the difference from the operating power of the electrolytic cell is used to obtain the low power accumulated value.

[0095] When the wind and solar power output meets the hard constraint lower limit but does not meet the soft constraint lower limit, the electrolyzer can be allowed to exceed the soft constraint within a certain range instead of being immediately controlled to start and stop. In addition, the accumulated value of the power of the electrolyzer exceeding the soft constraint lower limit in the past period of time (historical K cycles) is recorded, that is, the accumulated value of the power of the electrolyzer in P min-soft When running as follows, P min-soft The accumulated value of the difference from the operating power of the electrolytic cell is the low power accumulated value.

[0096] Step S112, controlling the electrolyzer that was turned on at the previous moment according to the low power accumulated value, the wind and solar power output power and the soft constraint power lower limit.

[0097] The larger the low power cumulative value, the more serious the degree to which the electrolyzer exceeds the lower limit of the soft constraint; the smaller the low power cumulative value, the less serious the degree to which the electrolyzer exceeds the lower limit of the soft constraint. Power can be allocated to the electrolyzer according to the low power cumulative value corresponding to each electrolyzer. The larger the low power cumulative value, the higher the allocated power can be, so as to reduce the degree to which the electrolyzer exceeds the lower limit of the soft constraint.

[0098] In some embodiments, power allocation can be performed according to the ratio of the low power accumulation value corresponding to the opened electrolytic cell to the sum of the low power accumulation values ​​corresponding to all the opened electrolytic cells. Assume that the low power accumulation value of the i-th opened electrolytic cell is The maximum power difference between a single electrolyzer and the soft constraint power lower limit is

[0099] if It means that assuming that the number of electrolyzers turned on at the current moment remains unchanged, the turned-on electrolyzers are operated according to the wind and solar power output, and the sum of the low-power accumulated values ​​of all turned-on electrolyzers in the past period of time is still greater than the low-power accumulated value corresponding to the current moment, that is, there is still a margin that does not meet the lower limit of the soft constraint, then the start and stop status of the electrolyzers in the electrolyzer cluster is controlled to remain unchanged.

[0100] According to the following formula:

[0101] Determine the power P of the i-th activated electrolytic cell i (t), and controlling the electrolytic cell to operate according to the corresponding power;

[0102] in,

[0103] if If there is no margin that does not meet the lower limit of the soft constraint, the low power accumulated values ​​corresponding to the electrolyzers that were turned on at the previous moment will be sorted from large to small and shut down in sequence until the lower limit is met. N(t) represents the number of electrolytic cells that are turned on in the electrolytic cell cluster at the current time t, P in (t) represents the wind and solar power output at the current time t. That is, first shut down the electrolyzer corresponding to the maximum low power cumulative value, reduce the number of electrolyzers that are turned on in the electrolyzer cluster at the current time t by 1, and calculate whether If the requirement is met, it means that only one electrolyzer needs to be shut down to meet the requirement. If the requirement is not met, the electrolyzer with the second highest cumulative low power value will be shut down. The number of electrolyzers that are turned on in the electrolyzer cluster at the current time t will be reduced by 2. Calculate whether the requirement is met. If the requirement is met, it means that only two electrolyzers need to be shut down to meet the requirement. If the requirement is not met, the electrolyzer with the third lowest cumulative power value will be shut down, and so on, until the requirement is met.

[0104] Similarly, the following formula can be used:

[0105] Determine the power P of the i-th activated electrolytic cell i (t), and control the electrolytic cell to operate at the corresponding power.

[0106] It should be noted that the above formula satisfies the law of energy conservation and can be expressed as follows:

[0107]

[0108] The above formula also satisfies the interval [t-KΔt, t+Δt], and the electrolytic cell is in P min-soft The power limit does not exceed It can be expressed by the formula as follows:

[0109]

[0110] Step S114: determine whether the wind and solar power output at the current time t is greater than N(t-1)P max-soft , P max-soft Indicates the soft power limit.

[0111] When the wind power output meets the lower limit of the soft constraint, it can be further determined whether the wind power output meets the upper limit of the soft constraint. max-soft , indicating that the wind power output meets the soft constraint upper limit, then execute step S116; if the wind power output is greater than N(t-1)P max-soft , indicating that the wind and solar power output does not meet the soft constraint upper limit, then step S118 is executed.

[0112] Step S116, controlling the start and stop states of the electrolytic cells in the electrolytic cell cluster to remain unchanged, and evenly distributing the wind and solar power output to the turned-on electrolytic cells.

[0113] Step S118, for each electrolytic cell that has been turned on at the previous moment, calculate the electrolytic cell in P in the historical K cycles max-soft When the above operation is performed, the operating power of the electrolyzer is max-soft The accumulated value of the difference is obtained to obtain the high power accumulated value.

[0114] When the wind and solar power output does not meet the soft constraint upper limit, regardless of whether the wind and solar power output meets the hard constraint upper limit, it means that the wind and solar power output is large, and one or more new electrolyzers can be opened, or power abandonment can be considered. Therefore, it is no longer necessary to distinguish between the cases where the wind and solar power output meets the hard constraint upper limit and the cases where it does not meet the hard constraint upper limit.

[0115] Similarly, when the wind and solar power output does not meet the soft constraint upper limit, the electrolyzer can be allowed to exceed the soft constraint within a certain range instead of being immediately controlled to start and stop. The accumulated value of the power of the electrolyzer exceeding the soft constraint upper limit in the past period of time (historical K cycles) can be recorded, that is, the electrolyzer in P max-soft When the above operation is performed, the operating power of the electrolyzer is max-soft The accumulated value of the difference between is the high power accumulated value. The high power accumulated value is used as a measurement indicator to allocate cluster power.

[0116] Step S120, controlling the electrolyzer cluster according to the high power accumulated value, the wind and solar power output and the soft constraint power upper limit.

[0117] The larger the high power cumulative value, the more serious the degree to which the electrolyzer exceeds the upper limit of the soft constraint; the smaller the high power cumulative value, the less serious the degree to which the electrolyzer exceeds the upper limit of the soft constraint. Power can be allocated to the electrolyzer according to the high power cumulative value corresponding to each electrolyzer. The larger the high power cumulative value, the smaller the allocated power can be, so as to reduce the degree to which the electrolyzer exceeds the upper limit of the soft constraint. In some embodiments, power allocation can be performed according to the ratio of the high power cumulative value corresponding to the turned-on electrolyzer to the sum of the high power cumulative values ​​corresponding to all turned-on electrolyzers.

[0118] Assume that the high power accumulated value of the i-th activated electrolyzer is The maximum power difference corresponding to a single electrolyzer is

[0119] if It indicates that there is no margin that does not meet the upper limit of the soft constraint, a new electrolyzer is started, and the power of the newly started electrolyzer is set to Pstart; Pstart can be set to different values ​​according to different electrolyzers.

[0120] According to the following formula:

[0121]

[0122] Determine the power P of the other i-th electrolytic cell that has been turned on i (t), and control the electrolytic cell to operate according to the corresponding power; where i = 1, ..., N(t)-1, P max-hard represents the hard power limit, In this way, the power of each electrolyzer can be guaranteed to operate between the soft constraint power upper limit and the hard constraint power upper limit, fully considering the additional power consumption brought by the newly started electrolyzer, and providing power abandonment space through the limitation of the hard constraint power upper limit. in (t) is not completely absorbed and can be abandoned.

[0123] if It means that there is still margin that does not meet the upper limit of the soft constraint, and the start and stop states of the electrolyzers in the electrolyzer cluster are controlled to remain unchanged;

[0124] According to the following formula:

[0125] Determine the power P of the i-th activated electrolytic cell i (t), and control the electrolytic cell to operate according to the corresponding power; where i=1,...,N(t)-1.

[0126] The control method of the electrolyzer cluster in the green electricity hydrogen production system of the embodiment of the present application sets soft constraints and hard constraints in advance. When the operating power of the electrolyzer cannot meet the soft constraints, it will not be started or stopped immediately, but allowed to exceed the soft constraints within a certain range. At the same time, the cumulative value of the over-limit power of the electrolyzer in the past period of time is recorded, and the cumulative value of the over-limit power is used as a measurement indicator. The cluster power is allocated according to the cumulative value of the over-limit power of each electrolyzer. In this way, the upper and lower limits of the electrolyzer power in the electrolyzer cluster control can be effectively expanded, thereby effectively alleviating the problem of frequent start and stop of the electrolyzer when the upstream wind and solar power output fluctuates greatly in the green system. While ensuring the safe operation of the system, it effectively improves the stability of the system operation and the efficiency of green hydrogen production, and realizes flexible control of the electrolyzer cluster, which has strong practical value for the actual green electricity hydrogen production system.

[0127] The present application also provides a control device for an electrolyzer cluster in a green electricity hydrogen production system. Figure 2 The control device 200 of the electrolyzer cluster in the green electricity hydrogen production system includes:

[0128] A wind and solar power output acquisition module 202, used for periodically acquiring wind and solar power output;

[0129] The first judgment module 204 is used to judge whether the wind and solar power output at the current time t is less than N(t-1)P min-soft ;P min-soft represents the lower limit of the soft constraint power; N(t-1) represents the number of electrolyzers that have been turned on in the electrolyzer cluster at the previous moment t-1;

[0130] The second judgment module 206 is used to determine that the wind and solar power output is less than N(t-1)P if the first judgment module 204 determines that the wind and solar power output is less than N(t-1)P min-soft , determine whether the wind and solar power output is less than N(t-1)P min-hard ;P min-hard represents the hard constraint power lower limit; P min-hard <P min-soft ;

[0131] The first control module 208 is used to determine that the wind and solar power output is less than N(t-1)P if the second judgment module 206 determines that the wind and solar power output is less than N(t-1)P min-hard , according to the hard-constrained power lower limit and the wind and solar power output, the electrolyzer that was turned on at the previous moment is controlled;

[0132] The second control module 210 is used to determine that the wind and solar power output is greater than or equal to N(t-1)P if the second judgment module 206 determines that the wind and solar power output is greater than or equal to N(t-1)P min-hard , for each electrolytic cell that was turned on at the previous moment, calculate the electrolytic cell in P in the historical K cycles min-soft When running as follows, P min-soft The accumulated value of the difference between the operating power of the electrolyzer and the operating power of the electrolyzer is used to obtain the low power accumulated value; the electrolyzer that was turned on at the previous moment is controlled according to the low power accumulated value, the wind and solar power output power and the soft constraint power lower limit;

[0133] The third judgment module 212 is used to determine that the wind and solar power output is greater than or equal to N(t-1)P if the first judgment module 204 determines that the wind and solar power output is greater than or equal to N(t-1)P min-soft , determine whether the wind and solar power output is greater than N(t-1)P max-soft , P max-soft Indicates the soft constraint power upper limit;

[0134] The third control module 214 is used to determine that the wind and solar power output is less than or equal to N(t-1)P if the third judgment module 212 determines that the wind and solar power output is less than or equal to N(t-1)P max-soft , then the start and stop states of the electrolyzers in the electrolyzer cluster are controlled to remain unchanged, and the wind and solar power output is evenly distributed to the electrolyzers that have been turned on;

[0135] The fourth control module 216 is used to determine that the wind and solar power output is greater than N(t-1)P max-soft , for each electrolytic cell that was turned on at the previous moment, calculate the electrolytic cell in P in the historical K cycles max-softWhen the above operation is performed, the operating power of the electrolyzer is max-soft The accumulated value of the difference between the values ​​of and is used to obtain the high power accumulated value; the electrolyzer cluster is controlled according to the high power accumulated value, the wind and solar power output power and the soft constraint power upper limit.

[0136] Optionally, the second control module 210 is specifically configured to control the electrolyzer that has been turned on at the previous moment according to the low power cumulative value, the wind and solar power output power and the soft constraint power lower limit through the following steps:

[0137] Assume that the low power accumulated value of the i-th activated electrolyzer is The maximum power difference between a single electrolyzer and the soft constraint power lower limit is

[0138] if Then the start and stop states of the electrolytic cells in the electrolytic cell cluster are controlled to remain unchanged;

[0139] According to the following formula:

[0140] Determine the power P of the i-th activated electrolytic cell i (t), and controlling the electrolytic cell to operate according to the corresponding power;

[0141] in,

[0142] if Then the low power accumulated values ​​of the electrolytic cells that were turned on at the previous moment are sorted from large to small and shut down in sequence until the low power accumulated values ​​are met. N(t) represents the number of electrolytic cells that are turned on in the electrolytic cell cluster at the current time t, P in (t) represents the wind and solar power output at the current time t;

[0143] According to the following formula:

[0144] Determine the power P of the i-th activated electrolytic cell i (t), and control the electrolytic cell to operate at the corresponding power.

[0145] Optionally, the first control module 208 is specifically used to determine the number of electrolyzers to be turned on at the current moment according to the wind and solar output power and the hard constraint power lower limit if the second judgment module determines that the wind and solar output power is less than N(t-1)Pmin-hard; the difference between the number of electrolyzers turned on at the previous moment and the number of electrolyzers to be turned on at the current moment is determined as the number of electrolyzers to be shut down at the current moment. - ; Control the N in the electrolytic cell that was turned on at the previous moment -The electrolyzers are shut down, and the remaining electrolyzers are used as the electrolyzers that are currently turned on; the wind and solar power output is evenly distributed to the electrolyzers that are currently turned on, and each electrolyzer that is currently turned on is controlled to operate according to the corresponding power.

[0146] Optionally, the first control module 208 is specifically configured to determine the number of electrolyzers to be turned on at the current moment according to the wind and solar power output and the hard constraint power lower limit through the following steps:

[0147] According to the following formula: Determine the number of electrolytic cells N(t) to be opened at the current moment, Indicates rounding down.

[0148] Optionally, the fourth control module 216 is specifically configured to control the electrolyzer cluster according to the high power cumulative value, the wind and solar power output power, and the soft constraint power upper limit through the following steps:

[0149] Assume that the high power accumulated value of the i-th activated electrolyzer is The maximum power difference corresponding to a single electrolyzer is

[0150] if Start a new electrolytic cell and set the power of the newly started electrolytic cell to P start ;

[0151] According to the following formula:

[0152]

[0153] Determine the power P of the other i-th electrolytic cell that has been turned on i (t), and control the electrolytic cell to operate according to the corresponding power; where i = 1, ..., N(t)-1, P max-hard represents the hard power limit,

[0154] if Then the start and stop states of the electrolytic cells in the electrolytic cell cluster are controlled to remain unchanged;

[0155] According to the following formula:

[0156] Determine the power P of the i-th activated electrolytic cell i (t), and control the electrolytic cell to operate according to the corresponding power; where i=1,...,N(t)-1.

[0157] The specific details of each module or unit in the above device have been described in detail in the corresponding method, so they will not be repeated here.

[0158] It should be noted that, although several modules or units of the equipment for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more modules or units described above can be embodied in one module or unit. On the contrary, the features and functions of one module or unit described above can be further divided into being embodied by multiple modules or units.

[0159] An embodiment of the present application also provides an electronic device, comprising: a processor; and a memory for storing instructions executable by the processor; wherein the processor is configured to execute the control method of the electrolyzer cluster in the green electricity hydrogen production system described above in the present example embodiment.

[0160] Reference Figure 3 , Figure 3 This is a schematic diagram of the structure of an electronic device in an embodiment of the present application. The specific embodiment of the present application does not limit the specific implementation of the electronic device.

[0161] like Figure 3 As shown, the electronic device may include: a processor 302 , a communication interface 304 , a memory 306 , and a communication bus 308 .

[0162] The processor 302 , the communication interface 304 , and the memory 306 communicate with each other via a communication bus 308 .

[0163] The communication interface 304 is used to communicate with other electronic devices or servers.

[0164] The processor 302 is used to execute the program 310, and specifically can execute the relevant steps in the above method embodiment.

[0165] Specifically, the program 310 may include program codes, which include computer operation instructions.

[0166] The processor 302 may be a central processing unit, or a specific integrated circuit, or one or more integrated circuits configured to implement the embodiments of the present application. The one or more processors included in the smart device may be processors of the same type, such as one or more CPUs; or processors of different types, such as one or more CPUs and one or more ASICs.

[0167] The memory 306 is used to store the program 310. The memory 306 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0168] The program 310 can be specifically used to enable the processor 302 to execute the steps in the above-mentioned embodiment of the control method for the electrolyzer cluster in the green electricity hydrogen production system.

[0169] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described devices and modules can refer to the corresponding process descriptions in the aforementioned method embodiments and will not be repeated here.

[0170] A computer-readable storage medium is also provided in an embodiment of the present application, on which a computer program is stored. When the computer program is executed by a processor, the control method of the electrolyzer cluster in the above-mentioned green electricity hydrogen production system is implemented.

[0171] It should be noted that the computer-readable storage medium shown in the present application may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory, a read-only memory, an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, device or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, optical cable, radio frequency, etc., or any suitable combination of the above.

[0172] In an embodiment of the present application, a computer program product is also provided. When the computer program product is run on a computer, the computer executes the control method of the electrolyzer cluster in the green electricity hydrogen production system.

[0173] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0174] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A control method for an electrolyzer cluster in a green electricity hydrogen production system, characterized in that: include: Periodically obtain wind and solar power output; Determine whether the wind and solar power output at the current time t is less than N(t-1)P min-soft ;P min-soft represents the lower limit of the soft constraint power; N(t-1) represents the number of electrolyzers that have been turned on in the electrolyzer cluster at the previous moment t-1; If the wind and solar power output is less than N(t-1)P min-soft , determine whether the wind and solar power output is less than N(t-1)P min-hard ;P min-hard represents the hard constraint power lower limit; P min-hard <P min-soft ; If the wind and solar power output is less than N(t-1)P min-hard , according to the hard constraint power lower limit and the wind and solar power output power, the electrolyzer that has been turned on at the previous moment is controlled; If the wind and solar power output is greater than or equal to N(t-1)P min-hard , for each electrolytic cell that has been turned on at the previous moment, calculate the electrolytic cell in P in the historical K cycles min-soft When running as follows, P min-soft The accumulated value of the difference between the operating power of the electrolytic cell and the operating power of the electrolytic cell is used to obtain a low power accumulated value; Controlling the electrolyzer that was turned on at the previous moment according to the low power accumulated value, the wind and solar power output power and the soft constraint power lower limit; If the wind and solar power output is greater than or equal to N(t-1)P min-soft , determine whether the wind and solar power output is greater than N(t-1)P max-soft , P max-soft Indicates the soft constraint power cap; If the wind and solar power output is less than or equal to N(t-1)P max-soft , then the start and stop states of the electrolyzers in the electrolyzer cluster are controlled to remain unchanged, and the wind and solar power output is evenly distributed to the electrolyzers that have been turned on; If the wind and solar power output is greater than N(t-1)P max-soft , for each electrolytic cell that has been turned on at the previous moment, calculate the electrolytic cell in P in the historical K cycles max-soft When the above operation is performed, the operating power of the electrolytic cell is P max-soft The accumulated value of the difference between the high power and the low power is obtained; The electrolyzer cluster is controlled according to the high power accumulated value, the wind and solar power output power and the soft constraint power upper limit.

2. The method according to claim 1, characterized in that The controlling of the electrolyzer that has been turned on at the previous moment according to the low power accumulated value, the wind and solar power output power and the soft constraint power lower limit includes: Assume that the low power accumulated value of the i-th activated electrolyzer is The maximum power difference between a single electrolyzer and the soft constraint power lower limit is if Then the start and stop states of the electrolytic cells in the electrolytic cell cluster are controlled to remain unchanged; According to the following formula: Determine the power P of the i-th activated electrolytic cell i (t), and controlling the electrolytic cell to operate at a corresponding power; in, if Then the low power accumulated values ​​of the electrolytic cells that were turned on at the previous moment are sorted from large to small and shut down in sequence until the low power accumulated values ​​are met. N(t) represents the number of electrolytic cells that are turned on in the electrolytic cell cluster at the current time t, P in (t) represents the wind and solar power output at the current time t; According to the following formula: Determine the power P of the i-th activated electrolytic cell i (t), and controlling the electrolytic cell to operate at a corresponding power.

3. The method according to claim 1, characterized in that The controlling of the electrolyzer that has been turned on at the previous moment according to the hard constraint power lower limit and the wind and solar power output power includes: Determine the number of electrolyzers to be turned on at the current moment based on the wind and solar power output and the hard-constrained power lower limit; The difference between the number of electrolytic cells that were turned on at the previous moment and the number of electrolytic cells to be turned on at the current moment is determined as the number of electrolytic cells to be shut down at the current moment, N. - ; Control the N in the electrolytic cell that was turned on at the previous moment - The electrolytic cells are shut down, and the remaining electrolytic cells that are turned on are used as the electrolytic cells that are turned on at the current moment; The wind and solar power output is evenly distributed to the electrolyzers that are currently turned on, and each electrolyzer that is currently turned on is controlled to operate according to the corresponding power.

4. The method according to claim 3, characterized in that The method of determining the number of electrolyzers to be turned on at the current moment according to the wind and solar power output and the hard constraint power lower limit includes: According to the following formula: Determine the number of electrolytic cells N(t) to be opened at the current moment, Indicates rounding down.

5. The method according to claim 1, characterized in that The controlling of the electrolyzer cluster according to the high power accumulated value, the wind and solar power output power and the soft constraint power upper limit includes: Assume that the high power accumulated value of the i-th activated electrolyzer is The maximum power difference corresponding to a single electrolyzer is if Start a new electrolytic cell and set the power of the newly started electrolytic cell to P start ; According to the following formula: Determine the power P of the other i-th electrolytic cell that has been turned on i (t), and control the electrolytic cell to operate according to the corresponding power; wherein i=1, ..., N(t)-1, P max-hard represents the hard power limit, if Then the start and stop states of the electrolytic cells in the electrolytic cell cluster are controlled to remain unchanged; According to the following formula: Determine the power P of the i-th activated electrolytic cell i (t), and control the electrolytic cell to operate according to the corresponding power; wherein, i=1,...,N(t)-1.

6. A control device for an electrolyzer cluster in a green electricity hydrogen production system, characterized in that: include: A wind and solar power output acquisition module is used to periodically acquire wind and solar power output; The first judgment module is used to judge whether the wind and solar power output at the current time t is less than N(t-1)P min-soft ;P min-soft represents the lower limit of the soft constraint power; N(t-1) represents the number of electrolyzers that have been turned on in the electrolyzer cluster at the previous moment t-1; The second judgment module is used to determine that the wind and solar power output is less than N(t-1)P min-soft , determine whether the wind and solar power output is less than N(t-1)P min-hard ;P min-hard represents the hard constraint power lower limit; P min-hard <P min-soft ; The first control module is used for determining that the wind and solar power output is less than N(t-1)P if the second judgment module determines that the wind and solar power output is less than N(t-1)P min-hard , according to the hard constraint power lower limit and the wind and solar power output power, the electrolyzer that has been turned on at the previous moment is controlled; The second control module is used to determine that the wind and solar power output is greater than or equal to N(t-1)P min-hard , for each electrolytic cell that has been turned on at the previous moment, calculate the electrolytic cell in P in the historical K cycles min-soft When running as follows, P min-soft The accumulated value of the difference between the operating power of the electrolyzer and the operating power of the electrolyzer is used to obtain a low power accumulated value; and the electrolyzer that has been turned on at the previous moment is controlled according to the low power accumulated value, the wind and solar power output power and the soft constraint power lower limit; The third judgment module is used to determine that the wind and solar power output is greater than or equal to N(t-1)P if the first judgment module determines that the wind and solar power output is greater than or equal to N(t-1)P min-soft , determine whether the wind and solar power output is greater than N(t-1)P max-soft , P max-soft Indicates the soft constraint power cap; The third control module is used to determine that the wind and solar power output is less than or equal to N(t-1)P if the third judgment module determines that the wind and solar power output is less than or equal to N(t-1)P max-soft , then the start and stop states of the electrolyzers in the electrolyzer cluster are controlled to remain unchanged, and the wind and solar power output is evenly distributed to the electrolyzers that have been turned on; The fourth control module is used for determining that the wind and solar power output is greater than N(t-1)P if the third judgment module determines that the wind and solar power output is greater than N(t-1)P max-soft , for each electrolytic cell that has been turned on at the previous moment, calculate the electrolytic cell in P in the historical K cycles max-soft When the above operation is performed, the operating power of the electrolytic cell is P max-soft The accumulated value of the difference between the high power and the low power is obtained; The electrolyzer cluster is controlled according to the high power accumulated value, the wind and solar power output power and the soft constraint power upper limit.

7. The device according to claim 6, characterized in that The second control module is specifically used to control the electrolyzer that has been turned on at the previous moment according to the low power cumulative value, the wind and solar power output power and the soft constraint power lower limit through the following steps: Assume that the low power accumulated value of the i-th activated electrolyzer is The maximum power difference between a single electrolyzer and the soft constraint power lower limit is if Then the start and stop states of the electrolytic cells in the electrolytic cell cluster are controlled to remain unchanged; According to the following formula: Determine the power P of the i-th activated electrolytic cell i (t), and controlling the electrolytic cell to operate at a corresponding power; in, if Then the low power accumulated values ​​of the electrolytic cells that were turned on at the previous moment are sorted from large to small and shut down in sequence until the low power accumulated values ​​are met. N(t) represents the number of electrolytic cells that are turned on in the electrolytic cell cluster at the current time t, P in (t) represents the wind and solar power output at the current time t; According to the following formula: Determine the power P of the i-th activated electrolytic cell i (t), and controlling the electrolytic cell to operate at a corresponding power.

8. The device according to claim 6, characterized in that The first control module is specifically used to determine the number of electrolyzers to be turned on at the current moment according to the wind and solar output power and the hard constraint power lower limit if the second judgment module determines that the wind and solar output power is less than N(t-1)Pmin-hard; the difference between the number of electrolyzers turned on at the previous moment and the number of electrolyzers to be turned on at the current moment is determined as the number of electrolyzers to be shut down at the current moment. - ; Control the N in the electrolytic cell that was turned on at the previous moment - The electrolyzers are shut down, and the remaining electrolyzers are used as the electrolyzers that are currently turned on; the wind and solar power output is evenly distributed to the electrolyzers that are currently turned on, and each electrolyzer that is currently turned on is controlled to operate according to the corresponding power.

9. The device according to claim 8, characterized in that The first control module is specifically used to determine the number of electrolyzers to be turned on at the current moment according to the wind and solar power output and the hard constraint power lower limit through the following steps: According to the following formula: Determine the number of electrolytic cells N(t) to be opened at the current moment, Indicates rounding down.

10. The device according to claim 6, characterized in that The fourth control module is specifically used to control the electrolyzer cluster according to the high power cumulative value, the wind and solar power output power and the soft constraint power upper limit through the following steps: Assume that the high power accumulated value of the i-th activated electrolyzer is The maximum power difference corresponding to a single electrolyzer is if Start a new electrolytic cell and set the power of the newly started electrolytic cell to P start ; According to the following formula: Determine the power P of the other i-th electrolytic cell that has been turned on i (t), and control the electrolytic cell to operate according to the corresponding power; wherein i=1, ..., N(t)-1, P max-hard represents the hard power limit, if Then the start and stop states of the electrolytic cells in the electrolytic cell cluster are controlled to remain unchanged; According to the following formula: Determine the power P of the i-th activated electrolytic cell i (t), and control the electrolytic cell to operate according to the corresponding power; wherein, i=1,...,N(t)-1.

Images