Energy scheduling control method and system for photovoltaic off-grid electrolysis hydrogen production

Abstract

The application provides a photovoltaic off-grid electrolysis hydrogen production energy scheduling control method and system, comprising: obtaining photovoltaic input power through a photovoltaic assembly; an energy scheduling management module controls a hydrogen production power source connected with an ALK electrolytic cell to work under constant current or constant power, and controls a hydrogen production power source connected with a PEM electrolytic cell to work under an MPPT mode; the energy scheduling management module sets multiple photovoltaic power intervals according to the photovoltaic input power; power distribution is performed for the ALK electrolytic cell and the PEM electrolytic cell according to the multiple photovoltaic power intervals, and photovoltaic fluctuation power is dynamically adjusted; by using the difference between the ALK electrolytic cell and the PEM electrolytic cell in dynamic response speed and cost, multiple types of electrolytic cells can be simultaneously used in a cooperative operation mode, the adaptability of the electrolytic cell to photovoltaic fluctuation output is improved, the differential utilization of the ALK electrolytic cell and the PEM electrolytic cell is realized, the energy efficiency is improved, the cost is controlled, and the economic benefit maximization is realized.

Description

Technical Field

[0001] This invention relates to the field of power technology, and in particular to an energy dispatch control method and system for off-grid photovoltaic electrolysis hydrogen production. Background Technology

[0002] With the transformation of the energy structure and the large-scale application of renewable energy, photovoltaic hydrogen production, as a clean energy technology, can effectively utilize solar power to convert it into hydrogen energy, realizing the consumption of photovoltaic power and green electricity hydrogen production.

[0003] Alkaline electrolysis hydrogen production technology is relatively mature and low in cost, but the energy conversion efficiency of the hydrogen production process is low. PEM electrolysis hydrogen production has a higher cost than alkaline electrolysis, but its energy conversion efficiency is high. By using multiple types of electrolyzers in synergistic hydrogen production, economic benefits can be maximized.

[0004] Different electrolyzers have different dynamic response characteristics. In the off-grid hydrogen production process, the randomness and volatility of photovoltaic energy cause frequent start-up and shutdown of hydrogen production equipment. Furthermore, the start-up process of the electrolyzer involves a cold start. The instability of start-up and shutdown ultimately leads to a large amount of energy loss, resulting in low hydrogen production efficiency.

[0005] A common control strategy involves using a start-stop control strategy for a single electrolyzer, requiring start-stop scheduling based on actual power load. This approach only considers the system's operating costs and does not account for the differences in response speed and hydrogen production efficiency among different electrolyzers. While it can absorb photovoltaic energy, it does not further increase the system's hydrogen production. Summary of the Invention

[0006] In view of this, the purpose of this invention is to provide an energy dispatch control method and system for off-grid photovoltaic electrolysis hydrogen production. By utilizing the differences in dynamic response speed and cost between ALK electrolyzers and PEM electrolyzers, multiple types of electrolyzers can be used simultaneously in a coordinated manner. This improves the adaptability of the electrolyzers to photovoltaic power fluctuations, realizes differentiated utilization of ALK electrolyzers and PEM electrolyzers, enhances energy efficiency and controls costs, and maximizes economic benefits.

[0007] In a first aspect, embodiments of the present invention provide an energy dispatch control method for off-grid photovoltaic electrolysis hydrogen production, which is applied to a control system. The control system includes photovoltaic modules, an energy dispatch management module, a hydrogen production power supply group, an electrolyzer group, and a hydrogen storage device group.

[0008] The input terminal of the hydrogen production power supply group is connected to the photovoltaic module, the output terminal of the hydrogen production power supply group is connected to one end of the electrolyzer group, the other end of the electrolyzer group is connected to the hydrogen storage device group, and the hydrogen production power supply group is connected to the energy dispatch management module through an interface; wherein, the hydrogen production power supply group includes multiple hydrogen production power sources, and the electrolyzer group includes multiple ALK electrolyzers and multiple PEM electrolyzers; the method includes:

[0009] The photovoltaic input power is obtained through the photovoltaic module;

[0010] The energy scheduling management module controls the hydrogen production power supply connected to the ALK electrolyzer to operate under constant current or constant power, and controls the hydrogen production power supply connected to the PEM electrolyzer to operate in MPPT mode.

[0011] The energy dispatch management module sets multiple photovoltaic power ranges according to the input power of the photovoltaic system;

[0012] Power is allocated to the ALK electrolyzer and the PEM electrolyzer according to multiple photovoltaic power ranges, and photovoltaic fluctuation power is dynamically adjusted.

[0013] Furthermore, the conditional constraints for each of the photovoltaic power ranges are implemented in the following manner:

[0014]

[0015] Among them, P pemRunMin P is the minimum operating power of the PEM electrolyzer. alkReadyMin P is the lower limit of the hot standby power of the ALK electrolytic cell. pemDynamic P represents the allowable power fluctuation of the PEM electrolyzer, indicating the limit of the photovoltaic power fluctuation. alkRunMin P is the minimum operating power of the ALK electrolyzer. alkAdvise P is the recommended power for the ALK electrolyzer. pemRunMax P is the maximum operating power of the PEM electrolyzer. alkRunMax P0 represents the maximum operating power of the ALK electrolytic cell; P0 to P6 represent the upper and lower limits of the photovoltaic input power in each of the photovoltaic power ranges.

[0016] Furthermore, power allocation is performed for the ALK electrolyzer and the PEM electrolyzer based on multiple photovoltaic power ranges, and photovoltaic power fluctuations are dynamically adjusted, including:

[0017] When the input power of the photovoltaic cell falls into the first interval [0, P0), the hydrogen production power supply corresponding to the ALK electrolyzer and the hydrogen production power supply corresponding to the PEM electrolyzer are both not working.

[0018] When the input power of the photovoltaic cell falls into the second interval [P0, P1), the hydrogen production power supply corresponding to the PEM electrolyzer is turned on and hot standby is activated.

[0019] When the input power of the photovoltaic cell falls into the third interval [P1, P2), the ALK electrolytic cell activates the hot standby mode.

[0020] When the input power of the photovoltaic falls into the fourth interval [P2, P3), the hydrogen production power supply corresponding to the ALK electrolyzer is turned on, and the output power of the PEM electrolyzer is set to the sum of the minimum operating power of the PEM electrolyzer and the allowable fluctuation power of the PEM electrolyzer. The first remaining energy is used by the ALK electrolyzer.

[0021] When the input power of the photovoltaic cell falls into the fifth interval [P3, P4), the output power of the ALK electrolyzer is set to the recommended power of the ALK electrolyzer, and the second remaining energy is used by the PEM electrolyzer.

[0022] When the input power of the photovoltaic falls into the sixth interval [P4, P5), the output power of the PEM electrolyzer is set to the difference between the maximum operating power of the PEM electrolyzer and the allowable fluctuation power of the PEM electrolyzer, and the third remaining energy is used by the ALK electrolyzer.

[0023] When the input power of the photovoltaic cell falls into the seventh interval [P5, P6), the output power of the ALK electrolyzer is set to the maximum operating power of the ALK electrolyzer, and the remaining energy is used by the PEM electrolyzer.

[0024] Furthermore, the method also includes:

[0025] Calculate the required power of the ALK electrolyzer based on the required power of the PEM electrolyzer and the input power of the photovoltaic cell;

[0026] The required power of the ALK electrolytic cell is calculated using the following formula:

[0027] P alk =P pv -P pem

[0028] Among them, P alk P is the power required for the ALK electrolytic cell. pv P is the input power of the photovoltaic system. pem This refers to the required power of the PEM electrolyzer.

[0029] Furthermore, the method also includes:

[0030] The energy dispatch management module collects the voltage, current and power of each hydrogen production power source in real time;

[0031] Calculate the total current and total power based on the voltage, the current, and the power;

[0032] The power of each hydrogen production power source is dynamically scheduled based on the total current or total power.

[0033] Secondly, embodiments of the present invention provide an energy dispatch control system for photovoltaic off-grid electrolysis hydrogen production, the control system comprising photovoltaic modules, an energy dispatch management module, a hydrogen production power supply group, an electrolyzer group, and a hydrogen storage device group;

[0034] The input end of the hydrogen production power supply group is connected to the photovoltaic module, the output end of the hydrogen production power supply group is connected to one end of the electrolyzer group, the other end of the electrolyzer group is connected to the hydrogen storage device group, and the hydrogen production power supply group is connected to the energy dispatch management module through an interface; wherein, the hydrogen production power supply group includes multiple hydrogen production power supplies, and the electrolyzer group includes multiple ALK electrolyzers and multiple PEM electrolyzers;

[0035] The photovoltaic module is used to obtain photovoltaic input power;

[0036] The energy scheduling management module is used to control the hydrogen production power supply connected to the ALK electrolyzer to operate under constant current or constant power, and to control the hydrogen production power supply connected to the PEM electrolyzer to operate in MPPT mode; to set multiple photovoltaic power ranges according to the input power of the photovoltaic; to allocate power to the ALK electrolyzer and the PEM electrolyzer according to the multiple photovoltaic power ranges, and to dynamically adjust the photovoltaic fluctuation power.

[0037] Furthermore, the conditional constraints for each of the photovoltaic power ranges are implemented in the following manner:

[0038]

[0039] Among them, P pemRunMin P is the minimum operating power of the PEM electrolyzer. alkReadyMin P is the lower limit of the hot standby power of the ALK electrolytic cell. pemDynamic P represents the allowable power fluctuation of the PEM electrolyzer, indicating the limit of the photovoltaic power fluctuation. alkRunMin P is the minimum operating power of the ALK electrolyzer. alkAdvise P is the recommended power for the ALK electrolyzer. pemRunMax P is the maximum operating power of the PEM electrolyzer. alkRunMax P0 represents the maximum operating power of the ALK electrolytic cell; P0 to P6 represent the upper and lower limits of the photovoltaic input power in each of the photovoltaic power ranges.

[0040] Furthermore, the energy scheduling and management module is specifically used for:

[0041] When the input power of the photovoltaic cell falls into the first interval [0, P0), the hydrogen production power supply corresponding to the ALK electrolyzer and the hydrogen production power supply corresponding to the PEM electrolyzer are both not working.

[0042] When the input power of the photovoltaic cell falls into the second interval [P0, P1), the hydrogen production power supply corresponding to the PEM electrolyzer is turned on and hot standby is activated.

[0043] When the input power of the photovoltaic cell falls into the third interval [P1, P2), the ALK electrolytic cell activates the hot standby mode.

[0044] When the input power of the photovoltaic falls into the fourth interval [P2, P3), the hydrogen production power supply corresponding to the ALK electrolyzer is turned on, and the output power of the PEM electrolyzer is set to the sum of the minimum operating power of the PEM electrolyzer and the allowable fluctuation power of the PEM electrolyzer. The first remaining energy is used by the ALK electrolyzer.

[0045] When the input power of the photovoltaic cell falls into the fifth interval [P3, P4), the output power of the ALK electrolyzer is set to the recommended power of the ALK electrolyzer, and the second remaining energy is used by the PEM electrolyzer.

[0046] When the input power of the photovoltaic falls into the sixth interval [P4, P5), the output power of the PEM electrolyzer is set to the difference between the maximum operating power of the PEM electrolyzer and the allowable fluctuation power of the PEM electrolyzer, and the third remaining energy is used by the ALK electrolyzer.

[0047] When the input power of the photovoltaic cell falls into the seventh interval [P5, P6), the output power of the ALK electrolyzer is set to the maximum operating power of the ALK electrolyzer, and the remaining energy is used by the PEM electrolyzer.

[0048] Thirdly, embodiments of the present invention provide an electronic device, including a memory and a processor, wherein the memory stores a computer program that can run on the processor, and the processor executes the computer program to implement the method described above.

[0049] Fourthly, embodiments of the present invention provide a computer-readable medium having processor-executable non-volatile program code that causes the processor to perform the method described above.

[0050] This invention provides an energy dispatch control method and system for off-grid photovoltaic electrolysis hydrogen production, applied to a control system. The control system includes photovoltaic modules, an energy dispatch management module, a hydrogen production power supply group, an electrolyzer group, and a hydrogen storage device group. The input end of the hydrogen production power supply group is connected to the photovoltaic modules, the output end of the hydrogen production power supply group is connected to one end of the electrolyzer group, and the other end of the electrolyzer group is connected to the hydrogen storage device group. The hydrogen production power supply group is connected to the energy dispatch management module through an interface. The hydrogen production power supply group includes multiple hydrogen production power sources, and the electrolyzer group includes multiple ALK electrolyzers and multiple PEM electrolyzers. The method includes: obtaining the input power of the photovoltaic modules; and the energy dispatch management module controlling the ALK electrolyzers. The connected hydrogen production power supply operates under constant current or constant power, and the hydrogen production power supply connected to the PEM electrolyzer operates in MPPT mode. The energy dispatch management module sets multiple photovoltaic power ranges based on the input power of the photovoltaic system. It allocates power to the ALK electrolyzer and PEM electrolyzer based on these multiple photovoltaic power ranges and dynamically adjusts the photovoltaic power fluctuations. By utilizing the differences in dynamic response speed and cost between the ALK and PEM electrolyzers, multiple types of electrolyzers can be used simultaneously in a coordinated manner. This improves the adaptability of the electrolyzers to photovoltaic power fluctuations, enables differentiated utilization of the ALK and PEM electrolyzers, improves energy efficiency, controls costs, and maximizes economic benefits.

[0051] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained in accordance with the structures particularly pointed out in the description, claims and drawings.

[0052] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0053] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0054] Figure 1 This is a flowchart of the energy dispatch and control method for photovoltaic off-grid electrolysis hydrogen production provided in Embodiment 1 of the present invention;

[0055] Figure 2 This is a schematic diagram of the energy dispatch and control system for photovoltaic off-grid electrolysis hydrogen production provided in Embodiment 2 of the present invention;

[0056] Figure 3 This is a schematic diagram of another photovoltaic off-grid electrolysis hydrogen production energy dispatch control system provided in Embodiment 2 of the present invention. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0058] To facilitate understanding of this embodiment, the embodiments of the present invention will be described in detail below.

[0059] Example 1:

[0060] Figure 1 The flowchart illustrates the energy dispatch and control method for photovoltaic off-grid electrolysis hydrogen production provided in Embodiment 1 of the present invention.

[0061] Reference Figure 1 This system is applied to a control system, which includes photovoltaic modules, an energy dispatch management module, a hydrogen production power supply group, an electrolyzer group, and a hydrogen storage device group. The input of the hydrogen production power supply group is connected to the photovoltaic modules, and the output of the hydrogen production power supply group is connected to one end of the electrolyzer group. The other end of the electrolyzer group is connected to the hydrogen storage device group. The hydrogen production power supply group is connected to the energy dispatch management module through an interface. The hydrogen production power supply group includes multiple hydrogen production power sources, and the electrolyzer group includes multiple ALK electrolyzers and multiple PEM electrolyzers. The control strategy software of the energy dispatch management module communicates with multiple hydrogen production power sources through a 485 interface. It can collect the current and power of the hydrogen production power sources and control the mode, target voltage, target current, target power, etc. of the hydrogen production power sources.

[0062] The method includes the following steps:

[0063] Step S101: Obtain the photovoltaic input power through photovoltaic modules;

[0064] Step S102: The energy scheduling management module controls the hydrogen production power supply connected to the ALK electrolyzer to operate under constant current or constant power, and controls the hydrogen production power supply connected to the PEM electrolyzer to operate in MPPT mode.

[0065] Here, the energy dispatch management module can also control the hydrogen production power supply connected to the PEM electrolyzer to operate in MPPT (Maximum Power Point Tracking) mode, that is, to ensure the maximum output of photovoltaic power by using maximum power tracking.

[0066] Step S103: The energy dispatch management module sets multiple photovoltaic power ranges according to the input power of the photovoltaic system;

[0067] Step S104: Power allocation is performed for the ALK electrolyzer and PEM electrolyzer based on multiple photovoltaic power ranges, and photovoltaic fluctuation power is dynamically adjusted.

[0068] In this embodiment, during the dynamic operation of the control strategy, the system controls the distribution of photovoltaic energy according to the capacity configuration of the hydrogen electrolyzer equipment. Photovoltaic energy with low fluctuation is allocated to the ALK electrolyzer (alkaline electrolyzer) for absorption and utilization, ensuring the stability of the alkaline electrolyzer. Photovoltaic energy with large fluctuation is allocated to the PEM electrolyzer to make full use of the PEM electrolyzer's fast response advantage.

[0069] Furthermore, the conditional constraints for each photovoltaic power range are implemented in the following way:

[0070]

[0071] Among them, P pemRunMin P is the minimum operating power of the PEM electrolyzer. alkReadyMin P is the lower limit of the hot standby power for the ALK electrolyzer. pemDynamic P represents the permissible power fluctuation of the PEM electrolyzer, indicating the limit of photovoltaic power fluctuation. alkRunMin P is the minimum operating power of the ALK electrolyzer. alkAdvise For the recommended power of the ALK electrolyzer, P pemRunMax P represents the maximum operating power of the PEM electrolyzer. alkRunMax P0 represents the maximum operating power of the ALK electrolyzer; P0 to P6 represent the upper and lower limits of the photovoltaic input power in each photovoltaic power range.

[0072] Specifically, during the design phase, the control strategy software of the energy dispatch management module needs to configure the upper and lower limit power and hot standby power required by the PEM electrolyzer and ALK electrolyzer to ensure the safety of the electrolyzers. At the same time, it is also necessary to dynamically adjust the photovoltaic fluctuation power. Therefore, seven photovoltaic power ranges are set for the power allocation of the system composed of PEM electrolyzers and ALK electrolyzers. The condition constraints for each power range can be referred to formula (2).

[0073] P pemDynamic This indicates a limit on fluctuating photovoltaic power, which is absorbed by the PEM electrolyzer; when the power is low and about to drop, the PEM electrolyzer ensures that it is allocated at least P power. pemRunMin +P pemDynamic Therefore, when photovoltaic power decreases, it can avoid touching P. pemRunMin To ensure the stable operation of the PEM electrolyzer;

[0074] When the power is high and increasing, ensure the PEM electrolyzer operates at P. pemRunMax -P pemDynamic It can avoid touching P pemRunMax This ensures that excess power resulting from increased photovoltaic fluctuations is allocated to the ALK electrolyzer.

[0075] Furthermore, step S104 includes the following steps:

[0076] Step S301: When the input power of the photovoltaic cell falls into the first interval [0, P0), the hydrogen production power supply corresponding to the ALK electrolyzer and the hydrogen production power supply corresponding to the PEM electrolyzer are both not working.

[0077] Here, when the input power of the photovoltaic falls into the first interval [0, P0), the photovoltaic power is insufficient, and the hydrogen production power supply corresponding to the ALK electrolyzer and the hydrogen production power supply corresponding to the PEM electrolyzer are not working.

[0078] Step S302: When the input power of the photovoltaic cell falls into the second interval [P0, P1), the hydrogen production power supply corresponding to the PEM electrolyzer is turned on and the hot standby is activated.

[0079] Here, when the input power of the photovoltaic power falls into the second interval [P0, P1), it exceeds P. pemRunMin The hydrogen production power supply corresponding to the PEM electrolyzer is turned on and put into hot standby mode. Hot standby mode refers to the equipment used to heat the electrolyte.

[0080] Step S303: When the input power of the photovoltaic falls into the third interval [P1, P2), the ALK electrolyzer is activated for hot standby.

[0081] Here, when the input power of the photovoltaic falls into the third interval [P1, P2), it exceeds P. pemRunMin +P alkReadyMin The ALK electrolytic cell is now in hot standby mode.

[0082] Step S304: When the input power of the photovoltaic falls into the fourth interval [P2, P3), the hydrogen production power supply corresponding to the ALK electrolyzer is turned on, and the output power of the PEM electrolyzer is set to the sum of the minimum operating power of the PEM electrolyzer and the allowable fluctuation power of the PEM electrolyzer. The first remaining energy is used by the ALK electrolyzer.

[0083] Here, when the input power of the photovoltaic power falls into the fourth interval [P2, P3), it exceeds P. pemRunMin +P pemDynamic +P alkRunMin The hydrogen production power supply for the ALK electrolyzer is turned on, and the output power of the PEM electrolyzer is set to P. pemRunMin +P pemDynamic The first remaining energy is used by the ALK electrolyzer.

[0084] Step S305: When the input power of the photovoltaic cell falls into the fifth interval [P3, P4), the output power of the ALK electrolyzer is set to the recommended power of the ALK electrolyzer, and the second remaining energy is used by the PEM electrolyzer.

[0085] Here, when the input power of the photovoltaic falls into the fifth interval [P3, P4), it exceeds P. pemRunMin +P pemDynamic +P alkAdvise The ALK electrolytic cell is set to output power of P. alkAdvise The second remaining energy is used in the PEM electrolyzer.

[0086] Step S306: When the input power of the photovoltaic falls into the sixth interval [P4, P5), the output power of the PEM electrolyzer is set to the difference between the maximum operating power of the PEM electrolyzer and the allowable fluctuation power of the PEM electrolyzer, and the third remaining energy is used by the ALK electrolyzer.

[0087] Here, when the input power of the photovoltaic falls into the sixth interval [P4, P5), it exceeds P. pemRunMax -P pemDynamic +P alkAdvise The PEM electrolytic cell is set to output power of P. pemRunMax -P pemDynamic The remaining energy is then used in the ALK electrolytic cell.

[0088] Step S307: When the input power of the photovoltaic cell falls into the seventh interval [P5, P6), the output power of the ALK electrolyzer is set to the maximum operating power of the ALK electrolyzer, and the remaining energy is used by the PEM electrolyzer.

[0089] Here, when the input power of the photovoltaic falls into the seventh interval [P5, P6), it exceeds P. pemRunMax -P pemDynamic +P alkRunMax The ALK electrolytic cell is set to output power of P. alkRunMax The remaining energy is then used in the PEM electrolyzer.

[0090] Due to the volatility of photovoltaic energy output, when Ppv crosses intervals, it is necessary to set a certain time lag and energy lag to avoid frequent interval jumps.

[0091] Collect energy efficiency data such as hydrogen production and electricity generation from the electrolyzer, adjust power weights, and further optimize energy efficiency. The power boundaries of each of the above intervals can be fine-tuned according to the energy efficiency situation.

[0092] Furthermore, the method also includes the following steps:

[0093] Step S401: Calculate the required power of the ALK electrolyzer based on the required power of the PEM electrolyzer and the input power of the photovoltaic cell;

[0094] Calculate the required power of the ALK electrolytic cell according to formula (2):

[0095] P alk =P pv -P pem (2)

[0096] Among them, P alk P is the power required for the ALK electrolyzer. pv P represents the input power of the photovoltaic system. pem This refers to the power required for a PEM electrolyzer.

[0097] Specifically, the energy obtained by the hydrogen production power source from the output side of the photovoltaic module, except for a small amount of backup loss, is all used to supply the electrolyzer, and the energy loss due to damage is negligible.

[0098] Furthermore, the method also includes the following steps:

[0099] Step S501: The energy dispatch management module collects the voltage, current and power of each hydrogen production power source in real time.

[0100] Step S502: Calculate the total current and total power based on voltage, current, and power;

[0101] Step S503: Dynamically schedule the power of each hydrogen production power source based on the total current or total power.

[0102] Specifically, the control strategy software of the energy dispatch management module can also collect and summarize parameters such as voltage, current, and power of each hydrogen production power source in real time. After feedback of total current or total power parameters, it can dynamically dispatch the power of each hydrogen production power source, such as setting a target power for the alkali tank power source in real time. The current, voltage, and power of the hydrogen production power source need to have upper operating limits set and be matched with the capacity of the electrolyzer equipment.

[0103] This application utilizes the fast response speed of the PEM electrolyzer to absorb the fluctuating power of the photovoltaic system as much as possible, and employs maximum power point tracking to ensure the maximum output of the photovoltaic system, thereby maximizing the utilization of solar energy. Alternatively, an ALK electrolyzer can be used to absorb the stable power of the photovoltaic system as much as possible, ultimately achieving the optimal solution for electrolysis efficiency and cost.

[0104] Example 2:

[0105] Figure 2 This is a schematic diagram of the energy dispatch and control system for photovoltaic off-grid electrolysis hydrogen production provided in Embodiment 2 of the present invention.

[0106] Reference Figure 2The control system includes photovoltaic modules, an energy dispatch management module, a hydrogen production power supply group, an electrolyzer group, and a hydrogen storage device group. The input end of the hydrogen production power supply group is connected to the photovoltaic modules, the output end of the hydrogen production power supply group is connected to one end of the electrolyzer group, the other end of the electrolyzer group is connected to the hydrogen storage device group, and the hydrogen production power supply group is connected to the energy dispatch management module through an interface.

[0107] Among them, reference Figure 3 The hydrogen production power unit includes multiple hydrogen production power sources, and the electrolyzer group includes multiple ALK electrolyzers and multiple PEM electrolyzers.

[0108] Photovoltaic modules are used to capture the input power from photovoltaics.

[0109] The energy dispatch management module is used to control the hydrogen production power supply connected to the ALK electrolyzer to operate under constant current or constant power, and to control the hydrogen production power supply connected to the PEM electrolyzer to operate in MPPT mode; it sets multiple photovoltaic power ranges according to the input power of the photovoltaic; it allocates power to the ALK electrolyzer and the PEM electrolyzer according to the multiple photovoltaic power ranges, and dynamically adjusts the photovoltaic fluctuation power.

[0110] Furthermore, the conditional constraints for each photovoltaic power range are implemented in the following way:

[0111]

[0112] Among them, P pemRunMin P is the minimum operating power of the PEM electrolyzer. alkReadyMin P is the lower limit of the hot standby power for the ALK electrolyzer. pemDynamic P represents the permissible power fluctuation of the PEM electrolyzer, indicating the limit of photovoltaic power fluctuation. alkRunMin P is the minimum operating power of the ALK electrolyzer. alkAdvise For the recommended power of the ALK electrolyzer, P pemRunMax P represents the maximum operating power of the PEM electrolyzer. alkRunMax P0 represents the maximum operating power of the ALK electrolyzer; P0 to P6 represent the upper and lower limits of the photovoltaic input power in each photovoltaic power range.

[0113] Furthermore, the energy dispatch management module is specifically used for:

[0114] When the input power of the photovoltaic cell falls into the first interval [0, P0), the hydrogen production power supply corresponding to the ALK electrolyzer and the hydrogen production power supply corresponding to the PEM electrolyzer are both not working.

[0115] When the input power of the photovoltaic cell falls into the second interval [P0, P1), the hydrogen production power supply corresponding to the PEM electrolyzer is turned on and the hot standby is activated.

[0116] When the input power of the photovoltaic cell falls into the third interval [P1, P2), the ALK electrolyzer is activated for hot standby.

[0117] When the input power of the photovoltaic falls into the fourth interval [P2, P3), the hydrogen production power supply corresponding to the ALK electrolyzer is turned on, and the output power of the PEM electrolyzer is set to the sum of the minimum operating power of the PEM electrolyzer and the allowable fluctuation power of the PEM electrolyzer. The first remaining energy is used by the ALK electrolyzer.

[0118] When the input power of the photovoltaic cell falls into the fifth interval [P3, P4), the output power of the ALK electrolyzer is set to the recommended power of the ALK electrolyzer, and the second remaining energy is used by the PEM electrolyzer.

[0119] When the input power of the photovoltaic falls into the sixth interval [P4, P5), the output power of the PEM electrolyzer is set to the difference between the maximum operating power of the PEM electrolyzer and the allowable fluctuation power of the PEM electrolyzer, and the third remaining energy is used by the ALK electrolyzer.

[0120] When the input power of the photovoltaic cell falls into the seventh interval [P5, P6), the output power of the ALK electrolyzer is set to the maximum operating power of the ALK electrolyzer, and the remaining energy is used by the PEM electrolyzer.

[0121] This invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the energy dispatch control method for photovoltaic off-grid electrolysis hydrogen production provided in the above embodiments.

[0122] This invention also provides a computer-readable medium having processor-executable non-volatile program code, on which a computer program is stored. When the computer program is run by a processor, it executes the steps of the energy dispatch control method for photovoltaic off-grid electrolysis hydrogen production described above.

[0123] The computer program product provided in this embodiment of the invention includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the methods described in the preceding method embodiments. For specific implementation details, please refer to the method embodiments, which will not be repeated here.

[0124] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the system and apparatus described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0125] Furthermore, in the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0126] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0127] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0128] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for energy dispatch and control of off-grid photovoltaic electrolysis hydrogen production, characterized in that, It is applied to a control system, which includes photovoltaic modules, an energy dispatch management module, a hydrogen production power supply group, an electrolyzer group, and a hydrogen storage device group; The input terminal of the hydrogen production power supply group is connected to the photovoltaic module, the output terminal of the hydrogen production power supply group is connected to one end of the electrolyzer group, the other end of the electrolyzer group is connected to the hydrogen storage device group, and the hydrogen production power supply group is connected to the energy dispatch management module through an interface; wherein, the hydrogen production power supply group includes multiple hydrogen production power sources, and the electrolyzer group includes multiple ALK electrolyzers and multiple PEM electrolyzers; the method includes: The photovoltaic input power is obtained through the photovoltaic module; The energy scheduling management module controls the hydrogen production power supply connected to the ALK electrolyzer to operate under constant current or constant power, and controls the hydrogen production power supply connected to the PEM electrolyzer to operate in MPPT mode. The energy dispatch management module sets multiple photovoltaic power ranges according to the input power of the photovoltaic system; Power is allocated to the ALK electrolyzer and the PEM electrolyzer according to multiple photovoltaic power ranges, and photovoltaic fluctuation power is dynamically adjusted. The conditional constraints for each photovoltaic power range are implemented in the following manner: Among them, P pemRunMin P is the minimum operating power of the PEM electrolyzer. alkReadyMin P is the lower limit of the hot standby power of the ALK electrolytic cell. pemDynamic P represents the allowable power fluctuation of the PEM electrolyzer, indicating the limit of the photovoltaic power fluctuation. alkRunMin P is the minimum operating power of the ALK electrolyzer. alkAdvise P is the recommended power for the ALK electrolyzer. pemRunMax P is the maximum operating power of the PEM electrolyzer. alkRunMax P0 represents the maximum operating power of the ALK electrolytic cell; P0~P6 represent the upper and lower limits of the photovoltaic input power in each of the photovoltaic power ranges.

2. The energy dispatch and control method for off-grid photovoltaic electrolysis hydrogen production according to claim 1, characterized in that, Power allocation is performed on the ALK electrolyzer and the PEM electrolyzer according to multiple photovoltaic power ranges, and photovoltaic power fluctuations are dynamically adjusted, including: When the input power of the photovoltaic cell falls into the first interval [0, P0), the hydrogen production power supply corresponding to the ALK electrolyzer and the hydrogen production power supply corresponding to the PEM electrolyzer are both not working. When the input power of the photovoltaic cell falls into the second interval [P0, P1), the hydrogen production power supply corresponding to the PEM electrolyzer is turned on and hot standby is activated. When the input power of the photovoltaic cell falls into the third interval [P1, P2), the ALK electrolytic cell activates the hot standby mode. When the input power of the photovoltaic falls into the fourth interval [P2, P3), the hydrogen production power supply corresponding to the ALK electrolyzer is turned on, and the output power of the PEM electrolyzer is set to the sum of the minimum operating power of the PEM electrolyzer and the allowable fluctuation power of the PEM electrolyzer. The first remaining energy is used by the ALK electrolyzer. When the input power of the photovoltaic cell falls into the fifth interval [P3, P4), the output power of the ALK electrolyzer is set to the recommended power of the ALK electrolyzer, and the second remaining energy is used by the PEM electrolyzer. When the input power of the photovoltaic falls into the sixth interval [P4, P5), the output power of the PEM electrolyzer is set to the difference between the maximum operating power of the PEM electrolyzer and the allowable fluctuation power of the PEM electrolyzer, and the third remaining energy is used by the ALK electrolyzer. When the input power of the photovoltaic cell falls into the seventh interval [P5, P6), the output power of the ALK electrolyzer is set to the maximum operating power of the ALK electrolyzer, and the remaining energy is used by the PEM electrolyzer.

3. The energy dispatch and control method for off-grid photovoltaic electrolysis hydrogen production according to claim 1, characterized in that, The method further includes: Calculate the required power of the ALK electrolyzer based on the required power of the PEM electrolyzer and the input power of the photovoltaic cell; The required power of the ALK electrolytic cell is calculated using the following formula: P alk =P pv -P pem Among them, P alk P is the power required for the ALK electrolytic cell. pv P is the input power of the photovoltaic system. pem This refers to the required power of the PEM electrolyzer.

4. The energy dispatch and control method for off-grid photovoltaic electrolysis hydrogen production according to claim 1, characterized in that, The method further includes: The energy dispatch management module collects the voltage, current and power of each hydrogen production power source in real time; Calculate the total current and total power based on the voltage, the current, and the power; The power of each hydrogen production power source is dynamically scheduled based on the total current or total power.

5. An energy dispatch and control system for photovoltaic off-grid electrolysis hydrogen production, characterized in that, The control system includes photovoltaic modules, an energy dispatch management module, a hydrogen production power supply group, an electrolyzer group, and a hydrogen storage device group. The input end of the hydrogen production power supply group is connected to the photovoltaic module, the output end of the hydrogen production power supply group is connected to one end of the electrolyzer group, the other end of the electrolyzer group is connected to the hydrogen storage device group, and the hydrogen production power supply group is connected to the energy dispatch management module through an interface; wherein, the hydrogen production power supply group includes multiple hydrogen production power supplies, and the electrolyzer group includes multiple ALK electrolyzers and multiple PEM electrolyzers; The photovoltaic module is used to obtain photovoltaic input power; The energy scheduling management module is used to control the hydrogen production power supply connected to the ALK electrolyzer to operate under constant current or constant power, and to control the hydrogen production power supply connected to the PEM electrolyzer to operate in MPPT mode; to set multiple photovoltaic power ranges according to the input power of the photovoltaic; to allocate power to the ALK electrolyzer and the PEM electrolyzer according to the multiple photovoltaic power ranges; and to dynamically adjust the photovoltaic fluctuation power. The conditional constraints for each photovoltaic power range are implemented in the following manner: Among them, P pemRunMin P is the minimum operating power of the PEM electrolyzer. alkReadyMin P is the lower limit of the hot standby power of the ALK electrolytic cell. pemDynamic P represents the allowable power fluctuation of the PEM electrolyzer, indicating the limit of the photovoltaic power fluctuation. alkRunMin P is the minimum operating power of the ALK electrolyzer. alkAdvise P is the recommended power for the ALK electrolyzer. pemRunMax P is the maximum operating power of the PEM electrolyzer. alkRunMax P0 represents the maximum operating power of the ALK electrolytic cell; P0~P6 represent the upper and lower limits of the photovoltaic input power in each of the photovoltaic power ranges.

6. The energy dispatch and control system for off-grid photovoltaic electrolysis hydrogen production according to claim 5, characterized in that, The energy scheduling and management module is specifically used for: When the input power of the photovoltaic cell falls into the first interval [0, P0), the hydrogen production power supply corresponding to the ALK electrolyzer and the hydrogen production power supply corresponding to the PEM electrolyzer are both not working. When the input power of the photovoltaic cell falls into the second interval [P0, P1), the hydrogen production power supply corresponding to the PEM electrolyzer is turned on and hot standby is activated. When the input power of the photovoltaic cell falls into the third interval [P1, P2), the ALK electrolytic cell activates the hot standby mode. When the input power of the photovoltaic falls into the fourth interval [P2, P3), the hydrogen production power supply corresponding to the ALK electrolyzer is turned on, and the output power of the PEM electrolyzer is set to the sum of the minimum operating power of the PEM electrolyzer and the allowable fluctuation power of the PEM electrolyzer. The first remaining energy is used by the ALK electrolyzer. When the input power of the photovoltaic cell falls into the fifth interval [P3, P4), the output power of the ALK electrolyzer is set to the recommended power of the ALK electrolyzer, and the second remaining energy is used by the PEM electrolyzer. When the input power of the photovoltaic falls into the sixth interval [P4, P5), the output power of the PEM electrolyzer is set to the difference between the maximum operating power of the PEM electrolyzer and the allowable fluctuation power of the PEM electrolyzer, and the third remaining energy is used by the ALK electrolyzer. When the input power of the photovoltaic cell falls into the seventh interval [P5, P6), the output power of the ALK electrolyzer is set to the maximum operating power of the ALK electrolyzer, and the remaining energy is used by the PEM electrolyzer.

7. An electronic device comprising a memory and a processor, wherein the memory stores a computer program executable on the processor, characterized in that, When the processor executes the computer program, it implements the method described in any one of claims 1 to 4.

8. A computer-readable medium having processor-executable non-volatile program code, characterized in that, The program code causes the processor to execute the method described in any one of claims 1 to 4.

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