Start-stop control method and system for operation of electrolytic cell of off-grid hydrogen production station

Abstract

The invention relates to a start-stop control method and system for operation of electrolytic cells of an off-grid hydrogen production station. The method comprises the following steps: acquiring related data of an electrolytic cell cluster to construct a power interval self-adaptive regulation and control strategy; the start-up state is to judge whether the output of the wind generating set at a preset moment is greater than the minimum operation power of a single electrolytic cell or not; the operation state is to obtain the output of the wind generating set at the next moment, and calculate the power generation variable quantity of the wind generating set and the upper limit of the remaining power accommodating interval of the started electrolytic cell at the previous moment; judging the size between the upper limit of the residual power accommodating interval of the started electrolytic cell and the power generation variable quantity; further judging whether the lower limit of the residual power accommodating interval of the started electrolytic cells can meet the minimum power of each started electrolytic cell at the current moment or not; the number of the electrolytic cells capable of being started in the two states and the hydrogen production load rate of each electrolytic cell are calculated; and iteratively judging operation states at all moments to obtain an optimal start-stop control scheme.

Description

Technical Field

[0001] This application relates to the technical field of hydrogen production, and mainly relates to a start-stop control method and system for the operation of an electrolyzer in an off-grid hydrogen production station. Background Art

[0002] Using renewable energy such as wind power to generate electricity for hydrogen production can promote the realization of "zero-carbon" emissions and contribute to the construction of a clean, low-carbon, safe and efficient energy system. The electrolyzer is the core device of the electrolytic water hydrogen production technology. Taking the currently technically mature alkaline electrolyzer as an example, it has a large single-cell capacity and better economic indicators in large-scale hydrogen production systems. However, renewable energy generation such as wind energy, as the input power of the hydrogen production system, has volatility and uncertainty. Especially in off-grid hydrogen production systems, it will cause the alkaline electrolyzer, which has extremely high requirements for power stability, to start and stop frequently during operation. This will not only reduce its own service life, but also lead to a decrease in its hydrogen production, and even affect the purity of the product hydrogen, thereby affecting the safety of the entire electrolytic water hydrogen production system.

[0003] At the same time, in large-scale electrolytic hydrogen production projects, a single electrolyzer generally cannot meet the requirements of the hydrogen production system. In actual operation, an electrolyzer cluster is often composed of multiple electrolyzers to accommodate relevant renewable energy.

[0004] Therefore, advanced control strategies are crucial for the electrolyzer cluster. Existing research has shown that using advanced control strategies can effectively improve the hydrogen production efficiency of the system and reduce the number of electrolyzer startups. However, these control strategies cannot make full use of the hydrogen production characteristics of the electrolyzer, resulting in low hydrogen production efficiency. In severe cases, large-scale shutdowns will occur, which is very likely to cause inconsistent service lives of each electrolyzer, and thus safety problems will occur.

[0005] The Chinese invention patent with the publication number "CN114561667A" discloses a "Renewable Energy Hydrogen Production System and Its Start - Stop Control Method for Hydrogen Production Equipment". Specifically, it discloses that "after determining whether it is necessary to adjust the number of operating hydrogen production equipment, if the number of operations needs to be adjusted, the adjustment quantity is determined, and according to the current state of the renewable energy hydrogen production system, the adjustment method is determined as the number - priority method or the duration - priority method; among them, the number - priority method can balance the start - stop times of each hydrogen production equipment in the system, while the duration - priority method can balance the operating duration of each hydrogen production equipment in the system; determining the adjustment method to be adopted at this moment according to the current state of the system can comprehensively consider the influence of start - stop times and operating duration on the service life; thereafter, the corresponding hydrogen production equipment is controlled to act according to the adjustment method". However, this method only determines the adjustment method according to the current state of the renewable energy hydrogen production system, lacking detailed consideration and utilization of the specific data of the electrolyzer, resulting in the adjustment method not being comprehensive and accurate enough, and it is difficult to optimize the hydrogen production process more meticulously; in addition, this method only determines the adjustment quantity and method when it is necessary to adjust the number of operating hydrogen production equipment, and the adjustment methods are only the number - priority and duration - priority, lacking flexibility and being unable to well adapt to complex and changeable power generation situations. Summary of the Invention

[0006] In order to solve the above problems existing in the prior art, the present application provides a start - stop control method and system for the operation of electrolyzers in an off - grid hydrogen production station.

[0007] The technical solution of the present application is as follows:

[0008] On the one hand, the present invention proposes a start - stop control method for the operation of electrolyzers in an off - grid hydrogen production station, and the method includes:

[0009] Obtain relevant data of the electrolyzer cluster in the off - grid wind - power hydrogen production station and perform data cleaning; the relevant data includes the rated power of a single electrolyzer, the minimum operating power of a single electrolyzer, the output of the wind turbine generator set, and the number of electrolyzers included in the electrolyzer cluster;

[0010] Construct a power - interval adaptive regulation strategy including the startup state and the running state; the startup state specifically judges whether the output of the wind turbine generator set is greater than the minimum operating power of a single electrolyzer at a preset moment; the running state specifically obtains the output of the wind turbine generator set at the next moment, calculates the power change of the wind turbine generator set and the upper limit of the remaining power accommodation interval of the electrolyzers started at the previous moment; judges the magnitude between the upper limit of the remaining power accommodation interval of the started electrolyzers and the power change; further judges whether the lower limit of the remaining power accommodation interval of the started electrolyzers can meet the minimum power of each started electrolyzer at the current moment;

[0011] Calculate the number of electrolyzers that can be started and the hydrogen production load rate of each electrolyzer in the electrolyzer cluster of the hydrogen production station in two states according to the output of the wind turbine generator set and the rated power of a single electrolyzer;

[0012] Iteratively judge the operating states at all times until the optimal number of started electrolyzers is obtained and the hydrogen production amount is maximized, calculate the total hydrogen production amount of the hydrogen production station during the iteration cut-off period; obtain the optimal start-stop control scheme for the operation of the electrolyzer cluster in the off-grid wind power hydrogen production station.

[0013] Preferably, calculate the number of electrolyzers that can be started and the hydrogen production load rate of each electrolyzer in the starting state, specifically:

[0014] If at a preset initial time, the initial output of the wind turbine generator set is less than the minimum operating power of the single electrolyzer, that is where represents the initial output of the wind turbine generator set, P min represents the minimum operating power of a single electrolyzer, then no electrolyzer is started, n 0 = 0, and the hydrogen production load rate of each electrolyzer is η 0 = 0, where n 0 represents the number of initially started electrolyzers, and η 0 represents the initial hydrogen production load rate;

[0015] If at a preset initial time, the initial output of the wind turbine generator set is greater than the minimum operating power of the electrolyzer, that is then the number of electrolyzers that can be started is If n 0 ≥ N, take n 0 = N, where INF represents the infimum, P e represents the rated power of a single electrolyzer, and N represents the number of electrolyzers in the electrolyzer cluster; the operating power of each electrolyzer is The hydrogen production load rate of each electrolyzer is

[0016] Preferably, calculate the power generation change of the wind turbine generator set in the operating state and the upper limit of the remaining power accommodation range of the electrolyzers started at the previous moment, specifically:

[0017] The power generation change is expressed by the formula:

[0018]

[0019] In the formula, ΔP represents the power generation change; represents the output of the wind turbine generator set at the (i + 1)-th moment; i represents the index value at the i-th moment;

[0020] The upper limit of the remaining power accommodation range of the electrolyzers started at the previous moment is expressed by the formula:

[0021]

[0022] In the formula, RP represents the upper limit of the remaining power accommodation range; n i represents the number of electrolyzers started at the i-th moment.

[0023] Preferably, judge the size between the remaining power accommodation range of the started electrolyzers and the power generation change amount, and calculate the number of electrolyzers that can be started and the hydrogen production load rate of each electrolyzer in the electrolyzer cluster of the hydrogen production station during the operation state, specifically:

[0024] If the upper limit of the remaining power accommodation range of the started electrolyzers is less than the power generation change amount, that is, RP < ΔP, the number of started electrolyzers is expressed by the formula:

[0025]

[0026] In the formula, n i+1 represents the number of electrolyzers started at the (i + 1)-th moment;

[0027] The operating power of each electrolyzer at the current moment is expressed by the formula:

[0028]

[0029] If the upper limit of the remaining power accommodation range of the started electrolyzers is greater than or equal to the power generation change amount, that is, RP ≥ ΔP, further judge whether the lower limit of the remaining power accommodation range of the started electrolyzers can meet the minimum power of each started electrolyzer at the current moment, specifically:

[0030] If That is, it cannot be satisfied. At this time, the number of started electrolyzers is recalculated as Calculate the operating power of each electrolyzer, which is expressed by the formula:

[0031] If That is, it is satisfied. At this time, the number of started electrolyzers remains unchanged as n i+1 = n i ; Calculate the operating power of each electrolyzer, which is expressed by the formula:

[0032] The hydrogen production load rate η of each electrolyzer at the current moment i+1 , is expressed by the formula:

[0033]

[0034] Preferably, when the electrolyzer is in the startup state, if the initial output of the wind turbine is less than the minimum operating power of a single electrolyzer, there will be curtailed power, and the curtailed power is equal to the initial output of the wind turbine; when the electrolyzer is in the operating state, all the output of the wind turbine is used for hydrogen production and the electricity consumption of auxiliary equipment in the hydrogen production station; since the proportion of the electricity consumption of auxiliary equipment in the total electricity load is less than a preset threshold and is not considered, it can be obtained that there is no curtailed power in the operating state, that is, the curtailed power is equal to 0.

[0035] Preferably, the optimal start-stop control scheme is specifically that when starting n i+1 electrolyzers, since the curtailed power is 0, the hydrogen production amount in the hydrogen production station reaches the maximum.

[0036] Calculate the total hydrogen production amount in the hydrogen production station during the iterative cut-off period, which is expressed by the formula:

[0037]

[0038] In the formula, V t represents the total hydrogen production amount in the hydrogen production station during the t period; represents the output of the wind turbine during the t period; q t represents the hydrogen production power load of each electrolyzer during the t period; v t represents the hydrogen production amount of each electrolyzer during the t period; n t represents the number of electrolyzers started in the electrolyzer cluster during the t period; t represents the period.

[0039] Preferably, the method further includes real-time monitoring of the operating state of the electrolyzer. When the wind turbine changes, if the working power of each electrolyzer exceeds the set threshold or there is curtailed power, the alarm mechanism will be automatically triggered; the staff will timely adjust the number of started electrolyzers according to the power interval adaptive control strategy to realize the power distribution of the electrolyzer cluster.

[0040] On the other hand, the present invention also proposes a start-stop control system for the operation of an electrolyzer in an off-grid hydrogen production station, and the system includes a data acquisition module, a control strategy module, a scheme acquisition module, and a result output module, wherein:

[0041] The data acquisition module is used to acquire the relevant data of the electrolyzer cluster in the off-grid wind power hydrogen production station, including the rated power of a single electrolyzer, the minimum operating power of a single electrolyzer, the output of the wind turbine, and the number of electrolyzers included in the electrolyzer cluster; and transmit the relevant data to the control strategy module;

[0042] The control strategy module is used to construct an adaptive regulation strategy for power intervals, including the startup state and the running state. The startup state specifically judges whether the output power of the wind turbine generator is greater than the minimum running power of a single electrolyzer at a preset moment. The running state specifically obtains the output power of the wind turbine generator at the next moment, calculates the power generation change of the wind turbine generator and the upper limit of the remaining power accommodation interval of the electrolyzers that have been started at the previous moment, judges the magnitude relationship between the upper limit of the remaining power accommodation interval of the started electrolyzers and the power generation change, and further judges whether the lower limit of the remaining power accommodation interval of the started electrolyzers can meet the minimum power of each started electrolyzer at the current moment.

[0043] According to the output power of the wind turbine generator and the rated power of a single electrolyzer, calculate the number of electrolyzers that can be started in the electrolyzer cluster of the hydrogen production station and the hydrogen production load rate of each electrolyzer in the two states.

[0044] The scheme acquisition module is used to iteratively judge the running states at all moments until the optimal number of started electrolyzers is obtained, the hydrogen production amount reaches the maximum, calculate the total hydrogen production amount of the hydrogen production station during the iterative cut-off period, and obtain the optimal start-stop control scheme for the operation of the electrolyzer cluster in the off-grid wind power hydrogen production station.

[0045] The result output module is used to display the optimal start-stop control scheme.

[0046] On the other hand, the present invention also proposes an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements a start-stop control method for the operation of an electrolyzer in an off-grid hydrogen production station as described in any embodiment of the present invention.

[0047] On the other hand, the present invention also proposes a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, it implements a start-stop control method for the operation of an electrolyzer in an off-grid hydrogen production station as described in any embodiment of the present invention.

[0048] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0049] 1) The present invention provides a start-stop control method and system for the operation of an electrolyzer in an off-grid hydrogen production station, proposes an adaptive regulation strategy for power intervals, and through the start-stop control of the electrolyzer cluster in the off-grid wind power hydrogen production station, by accurately calculating the relationship between the wind power and the operation requirements of the electrolyzers, reduces the start-stop frequency of the electrolyzers, improves the hydrogen production efficiency of the hydrogen production station, extends the service life of the electrolyzers, and reduces the operation and maintenance costs.

[0050] 2) The present invention provides a start-stop control method and system for the operation of an electrolyzer in an off-grid hydrogen production station. By iteratively judging the operating states at all times until the optimal number of starting units is obtained, it can adjust the operating state of the electrolyzer in a timely manner according to the changes in wind power generation, reduce the impact of power generation fluctuations on the operation of the hydrogen production station, and improve the operating stability of the system;

[0051] 3) The present invention provides a start-stop control method and system for the operation of an electrolyzer in an off-grid hydrogen production station. By real-time obtaining the output of wind turbine generators and relevant power data of the electrolyzer, dynamically calculating the number of electrolyzers that can be started and the hydrogen production load rate, it can utilize wind energy for hydrogen production to the greatest extent, avoid energy waste, and improve energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 is the flowchart of the method in the embodiment of the present invention;

[0053] Figure 2 is the flowchart of the power interval adaptive control strategy in the embodiment of the present invention;

[0054] Figure 3 is the offshore wind power generation output curve diagram of the preset province in the embodiment of the present invention;

[0055] Figure 4 is the comparison diagram of the number of started and stopped electrolyzers between the chain control strategy and the power interval adaptive control strategy in the embodiment of the present invention;

[0056] Figure 5 is the comparison diagram of the hydrogen production amount between the chain control strategy and the power interval adaptive control strategy in the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0057] The following describes the specific embodiments of the present invention to facilitate those skilled in the art to understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are within the scope of protection.

[0058] The present invention provides the following technical solutions: a start-stop control method and system for the operation of an electrolyzer in an off-grid hydrogen production station.

[0059] Embodiment 1

[0060] Specifically refer to Figure 1 , this embodiment provides a start-stop control method for the operation of an electrolyzer in an off-grid hydrogen production station. The specific steps include:

[0061] S1. Obtain relevant data of the electrolyzer cluster in the off-grid wind power hydrogen production station, including the rated power of a single electrolyzer, the minimum operating power of a single electrolyzer, the output of the wind turbine generator, and the number of electrolyzers included in the electrolyzer cluster;

[0062] The method further includes data cleaning of the relevant data, and the data cleaning includes processing missing values, outliers, and unifying data formats;

[0063] In this embodiment, the rated power of a single electrolyzer is 5 MW, the minimum operating power of a single electrolyzer is 30% of the rated power of a single electrolyzer, that is, 1.5 MW; the number of electrolyzers included in the electrolyzer cluster is 10;

[0064] S2. Specifically refer to Figure 2 , and construct an adaptive power interval regulation strategy including the startup state and the operating state;

[0065] S21. The startup state is specifically to judge whether the output of the wind turbine generator is greater than the minimum operating power of a single electrolyzer at a preset moment, and calculate the number of electrolyzers that can be started and the hydrogen production load rate of each electrolyzer in the startup state;

[0066] If at a preset initial moment, the initial output of the wind turbine generator is less than the minimum operating power of a single electrolyzer, that is where represents the initial output of the wind turbine generator, P min represents the minimum operating power of a single electrolyzer, then no electrolyzer starts, n 0 = 0, and the hydrogen production load rate of each electrolyzer is η 0 = 0, where n 0 represents the number of initially started electrolyzers, and η 0 represents the initial hydrogen production load rate;

[0067] If at a preset initial moment, the initial output of the wind turbine generator is greater than the minimum operating power of the electrolyzer, that is then the number of electrolyzers that can be started is If n 0 ≥ N, take n 0 = N, where INF represents the infimum, P e represents the rated power of a single electrolyzer, and N represents the number of electrolyzers included in the electrolyzer cluster; the operating power of each electrolyzer is The hydrogen production load rate of each electrolyzer is

[0068] In this embodiment, the initial output of the wind turbine generator is 15 MW, then That is, the number of electrolyzers that can be started for the first time is 4, and the operating power of each electrolyzer is The hydrogen production load rate of each electrolyzer is 75%;

[0069] S22. The specific operating state is to obtain the output of the wind turbine generator at the next moment, calculate the power generation change of the wind turbine generator and the upper limit of the remaining power accommodation range of the electrolyzers started at the previous moment;

[0070] The power generation change is expressed by the formula:

[0071]

[0072] In the formula, ΔP represents the power generation change; represents the output of the wind turbine generator at the (i + 1)-th moment; i represents the index value at the i-th moment;

[0073] The upper limit of the remaining power accommodation range of the electrolyzers started at the previous moment is expressed by the formula:

[0074]

[0075] In the formula, RP represents the upper limit of the remaining power accommodation range; n i represents the number of electrolyzers started at the i-th moment.

[0076] In this embodiment, at this time, the upper limit of the fluctuation range accommodated by the off-grid wind power hydrogen production station is RP = (5×4 - 15) = 5 MW;

[0077] S23. Judge the magnitude between the upper limit of the remaining power accommodation range of the started electrolyzers and the power generation change, and calculate the number of electrolyzers that can be started in the electrolyzer cluster of the hydrogen production station and the hydrogen production load rate of each electrolyzer;

[0078] S231. If the upper limit of the remaining power accommodation range of the started electrolyzers is less than the power generation change, that is, RP < ΔP, the number of started electrolyzers is expressed by the formula:

[0079]

[0080] In the formula, n i+1 represents the number of electrolyzers started at the (i + 1)-th moment;

[0081] The operating power of each electrolyzer at the current moment is expressed by the formula:

[0082]

[0083] In this embodiment, the output of the wind power generation unit changes from 15 MW to 25 MW, that is, ΔP = 10 MW > 5 MW. At this time, RP < ΔP, that is, the power generation change amount is greater than the upper limit of the remaining power accommodation interval. When the increased power is evenly distributed to the power accommodation intervals of the currently started 4 electrolyzers, it has exceeded the rated operating power of 4 electrolyzers, 5 × 4 = 20 MW, and the number of electrolyzers to be started needs to be recalculated. The operating power of each electrolyzer is The hydrogen production load rate of each electrolyzer is

[0084] S232. If the upper limit of the remaining power accommodation interval of the started electrolyzers is greater than or equal to the power generation change amount, that is, RP ≥ ΔP, further determine whether the lower limit of the remaining power accommodation interval of the started electrolyzers can meet the minimum power of each started electrolyzer at the current moment, specifically:

[0085] S2321. If That is, it cannot be satisfied. At this time, the number of started electrolyzers is recalculated as Calculate the operating power of each electrolyzer, which is expressed by the formula:

[0086] In this embodiment, the output of the wind power generation unit changes from 15 MW to 5 MW, that is, ΔP = -10 MW. At this time, RP ≥ ΔP, that is, the power generation change amount is less than the upper limit of the remaining power accommodation interval; at this time, That is, when the decreased power is evenly distributed to the accommodation intervals of the 4 started electrolyzers, it cannot meet the minimum operating power of 4 electrolyzers, 30% × 5 × 4 = 6 MW. The number of started electrolyzers is recalculated as The operating power of each electrolyzer is The hydrogen production load rate of each electrolyzer is

[0087]

[0088] S2322. If That is, it is satisfied. At this time, the number of started electrolyzers remains unchanged at n i+1 = n i ; Calculate the operating power of each electrolyzer, which is expressed by the formula:

[0089] In this embodiment, the output of the wind power generation unit changes from 15 MW to 10 MW, that is, ΔP = -5 MW. At this time, RP ≥ ΔP, that is, the power generation change amount is less than the upper limit of the remaining power accommodation interval; at this time, That is, when the decreasing power is evenly distributed to the accommodation intervals of the 4 activated electrolyzers, the minimum operating power of the 4 electrolyzers can be satisfied, which is 30%×5×4 = 6 MW, and the number of activated electrolyzers remains unchanged at n i+1 = n i = 4; the operating power of each electrolyzer is The hydrogen production load rate of each electrolyzer is

[0090]

[0091] S3. The power interval adaptive control strategy only generates curtailment when the electrolyzers are in the on state and the initial output of the wind turbine generator is less than the minimum operating power of a single electrolyzer. The curtailment is equal to the initial output of the wind turbine generator. When the electrolyzers are in the operating state, the output of the wind turbine generator is all used for hydrogen production and the power consumption of the auxiliary equipment in the hydrogen production station. Since the proportion of the power consumption of the auxiliary equipment in the total power load is less than the preset threshold and is not considered, it can be obtained that there is no curtailment in the operating state, that is, the curtailment is equal to 0;

[0092] S4. Iteratively judge the operating states at all times until the optimal number of started electrolyzers is obtained, the hydrogen production amount reaches the maximum, and calculate the total hydrogen production amount of the hydrogen production station during the iterative cut-off period; obtain the optimal start-stop control scheme for the operation of the electrolyzer cluster in the off-grid wind power hydrogen production station;

[0093] S41. Calculate the total hydrogen production amount of the hydrogen production station during the iterative cut-off period, which is expressed by the formula:

[0094]

[0095] In the formula, V t represents the total hydrogen production amount of the hydrogen production station during the t period; P ct represents the output of the wind turbine generator during the t period; q t represents the hydrogen production power load of each electrolyzer during the t period; v t represents the hydrogen production amount of each electrolyzer during the t period; n t represents the number of started electrolyzers in the electrolyzer cluster during the t period; t represents the period;

[0096] S42. The specific optimal start-stop control scheme is that when n i+1 electrolyzers are started, since the curtailment is 0, the hydrogen production amount of the hydrogen production station reaches the maximum;

[0097] S5. The method further includes monitoring the operating state of the electrolyzer in real time. When the wind turbine generator set changes, if the operating power of each electrolyzer exceeds the set threshold or there is abandoned electricity, the alarm mechanism will be automatically triggered; the staff will timely adaptively adjust the number of started electrolyzers according to the power interval adaptive control strategy to realize the power distribution of the electrolyzer cluster.

[0098] S6. In this embodiment, please refer to Figure 3 , to obtain the 8760-hour wind power output curve graph of a preset province and a preset year, and select the chain control strategy for comparison with the power interval adaptive control strategy.

[0099] Please refer to Figure 4 , under the same conditions, it is obtained that the number of start-stop times of the electrolyzers in the off-grid hydrogen production station for each month of the year under the power interval adaptive control strategy is lower than that of the chain control strategy.

[0100] S7. In this embodiment, the DC power consumption of a single electrolyzer is preset to 5 MW, and the hydrogen production per hour is 1000 Nm 3 ; please refer to Figure 5 , compare the hydrogen production of the chain control strategy and the power interval adaptive control strategy for each month of the year, and it is obtained that the energy utilization rate and hydrogen production of the hydrogen production system for each month of the year under the power interval adaptive control strategy are higher than those of the chain control strategy.

[0101] Embodiment 2

[0102] This embodiment provides a start-stop control system for the operation of electrolyzers in an off-grid hydrogen production station. The system includes a data acquisition module, a control strategy module, a solution acquisition module, and a result output module, where:

[0103] The data acquisition module is used to acquire the relevant data of the electrolyzer cluster in the off-grid wind power hydrogen production station, including the rated power of a single electrolyzer, the minimum operating power of a single electrolyzer, the output of the wind turbine generator set, and the number of electrolyzers included in the electrolyzer cluster; and transmit the relevant data to the control strategy module.

[0104] The control strategy module is used to construct a power interval adaptive control strategy including the startup state and the running state; the startup state is specifically to judge whether the output of the wind turbine generator set at a preset moment is greater than the minimum operating power of a single electrolyzer; the running state is specifically to obtain the output of the wind turbine generator set at the next moment, calculate the power generation change amount of the wind turbine generator set and the upper limit of the remaining power accommodation interval of the electrolyzers started at the previous moment; judge the magnitude between the upper limit of the remaining power accommodation interval of the started electrolyzers and the power generation change amount; and further judge whether the lower limit of the remaining power accommodation interval of the started electrolyzers can meet the minimum power of each started electrolyzer at the current moment.

[0105] According to the output of the wind turbine generator set and the rated power of a single electrolyzer, calculate the number of electrolyzers that can be started in the electrolyzer cluster of the hydrogen production station and the hydrogen production load rate of each electrolyzer in the two states;

[0106] The said scheme acquisition module is used to iteratively judge the operating states at all moments until the optimal number of started electrolyzers is obtained, the hydrogen production amount reaches the maximum, calculate the total hydrogen production amount of the hydrogen production station during the iteration cut-off period; obtain the optimal start-stop control scheme for the operation of the electrolyzer cluster in the off-grid wind power hydrogen production station;

[0107] The said result output module is used to display the optimal start-stop control scheme.

[0108] Embodiment 3

[0109] This embodiment provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements a start-stop control method for the operation of an electrolyzer in an off-grid hydrogen production station as described in any embodiment of the present invention.

[0110] Embodiment 4

[0111] This embodiment provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, it implements a start-stop control method for the operation of an electrolyzer in an off-grid hydrogen production station as described in any embodiment of the present invention.

[0112] It should be noted that the systems, electronic devices, and computer-readable storage media described in the present invention are all based on the same principle as the method described in Embodiment 1, and will not be elaborated here.

[0113] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A start-stop control method for the operation of an electrolyzer in an off-grid hydrogen production station, characterized in that: The method comprises: Obtain relevant data of the electrolyzer cluster in the off-grid wind power hydrogen production station and perform data cleaning; the relevant data includes the rated power of a single electrolyzer, the minimum operating power of a single electrolyzer, the output of the wind turbine generator set, and the number of electrolyzers included in the electrolyzer cluster; Constructing a power interval adaptive control strategy includes a startup state and an operating state; the startup state is specifically to determine whether the output of the wind turbine generator set is greater than the minimum operating power of the single electrolyzer at a preset moment; the operating state is specifically to obtain the output of the wind turbine generator set at the next moment, calculate the power generation change of the wind turbine generator set and the upper limit of the remaining power accommodation interval of the electrolyzer started at the previous moment; determine the size between the upper limit of the remaining power accommodation interval of the started electrolyzer and the power generation change; and further determine whether the lower limit of the remaining power accommodation interval of the started electrolyzer can meet the minimum power of each electrolyzer started at the current moment; According to the output of the wind turbine and the rated power of a single electrolyzer, the number of electrolyzers that can be started in the electrolyzer cluster of the hydrogen production station and the hydrogen production load rate of each electrolyzer are calculated in two states; Iterate and judge the operating status at all times until the optimal number of electrolyzers to be started is obtained, the hydrogen production is maximized, and the total hydrogen production of the hydrogen production station during the iteration deadline is calculated; obtain the optimal start-stop control scheme for the operation of the electrolyzer cluster in the off-grid wind power hydrogen production station.

2. A start-stop control method for the operation of an electrolyzer in an off-grid hydrogen production station according to claim 1, characterized in that: Calculate the number of electrolyzers that can be started and the hydrogen production load rate of each electrolyzer in the startup state, specifically: If at the preset initial moment, the initial output of the wind turbine generator set is less than the minimum operating power of the single electrolyzer, that is, P c0 <P min , where P c0 Represents the initial output of the wind turbine generator set, P min represents the minimum operating power of a single electrolyzer, then no electrolyzer is started up n0 = 0, and the hydrogen production load rate of each electrolyzer is η0 = 0, where n0 represents the number of electrolyzers initially started up, and η0 represents the initial hydrogen production load rate; If at the preset initial moment, the initial output of the wind turbine generator set is greater than the minimum operating power of the electrolyzer, that is, The number of electrolytic cells that can be started is If n0≥N, take n0=N, where INF represents the infimum, P e represents the rated power of a single electrolyzer, N represents the number of electrolyzers in the electrolyzer cluster; the operating power of each electrolyzer is The hydrogen production load rate of each electrolyzer is 3. A start-stop control method for the operation of an electrolyzer in an off-grid hydrogen production station according to claim 1, characterized in that: Calculate the power generation change of the wind turbine generator set and the upper limit of the remaining power capacity range of the electrolyzer that was started at the last moment during the operation state, specifically: The power generation change is expressed as follows: In the formula, ΔP represents the change in power generation; represents the output of the wind turbine generator set at the i+1th moment; i represents the index value at the i-th moment; The upper limit of the remaining power accommodation range of the electrolyzer that was started at the last moment is expressed as follows: Where RP represents the upper limit of the remaining power accommodation range; n i Indicates the number of electrolytic cells started at the i-th moment.

4. A start-stop control method for the operation of an electrolyzer in an off-grid hydrogen production station according to claim 1, characterized in that: Determine the size between the remaining power accommodation interval of the started electrolyzer and the power generation change, and calculate the number of electrolyzers that can be started in the electrolyzer cluster of the hydrogen production station and the hydrogen production load rate of each electrolyzer in the operating state, specifically: If the upper limit of the remaining power accommodation range of the activated electrolytic cell is less than the power generation change, that is, RP<ΔP, the number of activated electrolytic cells is expressed as follows: Where n i+1 Indicates the number of electrolytic cells started at time i+1; The operating power of each electrolyzer at the current moment It is expressed as: If the upper limit of the remaining power accommodation interval of the started electrolytic cell is greater than or equal to the power generation change, that is, RP ≥ ΔP, it is further determined whether the lower limit of the remaining power accommodation interval of the started electrolytic cell can meet the minimum power of each electrolytic cell started at the current moment, specifically: like That is, it cannot be satisfied. At this time, the number of electrolytic cells started is recalculated as Calculate the operating power of each electrolyzer, expressed as: like That is, the number of electrolytic cells started at this time remains unchanged at n i+1 =n i ; Calculate the operating power of each electrolyzer, expressed as: The hydrogen production load rate η of each electrolyzer at the current moment i+1 , expressed as:

5. A start-stop control method for the operation of an electrolyzer in an off-grid hydrogen production station according to claim 1, characterized in that: The power range adaptive control strategy will only generate power abandonment when the electrolyzer is in the on state if the initial output of the wind generator set is less than the minimum operating power of a single electrolyzer, and the abandoned power is equal to the initial output of the wind generator set; When the electrolyzer is in operation, the output of the wind turbine generator set is all used for hydrogen production and electricity consumption of auxiliary equipment of the hydrogen production station; since the proportion of electricity consumption of auxiliary equipment in the total power load is less than the preset threshold, it is not taken into consideration, and it can be obtained that no power abandonment will be generated in the operation state, that is, the power abandonment is equal to 0.

6. A start-stop control method for the operation of an electrolyzer in an off-grid hydrogen production station according to claim 1, characterized in that: The optimal start-stop control scheme is specifically: when starting n i+1 When the number of electrolyzers is 1, the amount of hydrogen produced by the hydrogen production station is maximized because the amount of power wasted is 0. Calculate the total amount of hydrogen produced by the hydrogen production station during the iteration deadline, expressed as: Where V t It represents the total amount of hydrogen produced by the hydrogen production station during the period t; represents the output of wind turbine generator set in period t; q t represents the electricity load of hydrogen production of each electrolyzer during the period t; v t represents the amount of hydrogen produced by each electrolyzer during the period t; n t It indicates the number of electrolytic cells started in the electrolytic cell cluster during the period t; t indicates the period.

7. A start-stop control method for the operation of an electrolyzer in an off-grid hydrogen production station according to claim 1, characterized in that: The method also includes real-time monitoring of the operating status of the electrolyzers. When the wind turbine generator set changes, if the working power of each electrolyzer exceeds a set threshold or generates abandoned power, an alarm mechanism will be automatically triggered; the staff will promptly adjust the number of electrolyzers started according to the power range adaptive control strategy to achieve power allocation for the electrolyzer cluster.

8. A start-stop control system for the operation of an electrolyzer in an off-grid hydrogen production station, characterized in that: The system includes a data acquisition module, a control strategy module, a solution acquisition module and a result output module, wherein: The data acquisition module is used to obtain relevant data of the electrolyzer cluster in the off-grid wind power hydrogen production station, including the rated power of a single electrolyzer, the minimum operating power of a single electrolyzer, the output of the wind turbine generator set and the number of electrolyzers included in the electrolyzer cluster; and transmit the relevant data to the control strategy module; The control strategy module is used to construct a power interval adaptive control strategy including a startup state and an operation state; the startup state is specifically to determine whether the output of the wind turbine generator set is greater than the minimum operating power of the single electrolyzer at a preset moment; the operation state is specifically to obtain the output of the wind turbine generator set at the next moment, calculate the power generation change of the wind turbine generator set and the upper limit of the remaining power accommodation interval of the electrolyzer started at the previous moment; determine the size between the upper limit of the remaining power accommodation interval of the started electrolyzer and the power generation change; and further determine whether the lower limit of the remaining power accommodation interval of the started electrolyzer can meet the minimum power of each electrolyzer started at the current moment; According to the output of the wind turbine and the rated power of a single electrolyzer, the number of electrolyzers that can be started in the electrolyzer cluster of the hydrogen production station and the hydrogen production load rate of each electrolyzer are calculated in two states; The scheme acquisition module is used to iteratively determine the operating status at all times until the optimal number of electrolyzers to be started is obtained, the hydrogen production is maximized, and the total hydrogen production of the hydrogen production station during the iteration deadline is calculated; the optimal start-stop control scheme for the operation of the electrolyzer cluster in the off-grid wind power hydrogen production station is obtained; The result output module is used to display the optimal start-stop control solution.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, a start-stop control method for the operation of an electrolyzer in an off-grid hydrogen production station is implemented as described in any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, a start-stop control method for the operation of an electrolyzer in an off-grid hydrogen production station as described in any one of claims 1 to 7 is implemented.

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