Coordination control method and device for off-grid new energy hydrogen production, electronic equipment and medium

Abstract

The invention provides a coordination control method and device for off-grid new energy hydrogen production, electronic equipment and a medium, and relates to the technical field of new energy hydrogen production. The coordination control method for off-grid new energy hydrogen production comprises the following steps: performing first coordination control on off-grid new energy hydrogen production based on a steady-state control mode under the condition that the actually measured current frequency of a system is within an adjustment dead zone range; under the condition that the current frequency of the system is not in the adjustment dead zone range, performing second coordination control based on the transient state control mode; after the second coordination control, under the condition that the current frequency of the system is not in the adjustment dead zone range, third coordination control is carried out on off-network new energy hydrogen production based on the emergency control mode; and after the third coordination control, under the condition that the current frequency of the system is not in the adjustment dead zone range, determining a to-be-cut power value of off-grid new energy hydrogen production according to an overcut principle. According to the method, the load adjusting characteristic of the hydrogen production electrolytic cell is considered, source-load interaction is achieved, and the absorption rate of new energy is increased.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen production from renewable energy, for example, to a coordinated control method, device, electronic equipment and medium for off-grid hydrogen production from renewable energy. Background Art

[0002] Different from hydrogen production from fossil energy, hydrogen production from new energy refers to hydrogen produced from new energy such as wind and light. The green hydrogen production process is clean and pollution-free, with very low or even zero carbon emissions. It is the main way to encourage the development of the hydrogen energy industry on the supply side, and is expected to become the most important source of hydrogen production in the future low-carbon era. Off-grid hydrogen production is not restricted by the power grid and capacity, and is suitable for remote areas or places where traditional power grids cannot be accessed. Compared with grid-connected hydrogen production, off-grid hydrogen production eliminates grid-connected auxiliary equipment, can avoid the problems caused by grid connection, does not need to pay power transmission and distribution fees, and also reduces the cost of power transmission. Off-grid hydrogen production can not only absorb new energy well on site, but also realize large-scale green hydrogen production, which is the development trend of green hydrogen production in the future. However, off-grid hydrogen production from new energy loses the energy and inertial support provided by the large power grid, which brings challenges to the safe, stable and economic operation of the new energy hydrogen production power system.

[0003] In the related technologies, coordinated control of hydrogen production is generally achieved based on the power balance adjustment between energy storage and new energy. It has a high degree of dependence on energy storage, but only considers the maximum power generation power of new energy under the condition of energy storage margin, resulting in a low consumption rate of new energy. Summary of the invention

[0004] The present application aims to provide a coordinated control method, device, electronic equipment and medium for off-grid renewable energy hydrogen production.

[0005] According to one aspect of the present application, a coordinated control method for off-grid hydrogen production from renewable energy is proposed, comprising: when the measured current frequency of the system is within a preset regulation dead zone, performing a first coordinated control on the off-grid hydrogen production from renewable energy based on a preset steady-state control mode; when the current frequency of the system is not within the regulation dead zone, performing a second coordinated control on the off-grid hydrogen production from renewable energy based on a preset transient control mode; after the second coordinated control, when the current frequency of the system is still not within the regulation dead zone, performing a third coordinated control on the off-grid hydrogen production from renewable energy based on a preset emergency control mode; after the third coordinated control, when the current frequency of the system is still not within the regulation dead zone, determining the power value to be cut off of the off-grid hydrogen production from renewable energy according to the preset over-cut principle.

[0006] According to some embodiments, a first coordinated control is performed on off-grid new energy hydrogen production based on a preset steady-state control mode, including: obtaining the current power generation power of the new energy, the maximum charging power limit of energy storage, the current power of the energy storage, the current power of the hydrogen production load, the current predicted maximum power value of the new energy and the maximum working power value of the hydrogen production load; determining the maximum power value of the new energy according to the steady-state control mode, the current power generation power of the new energy, the maximum charging power limit of the energy storage and the current power of the energy storage; determining the power value of the hydrogen production load according to the current power of the hydrogen production load and the current power of the energy storage; determining the power command value of the new energy according to the maximum power value of the new energy and the current predicted maximum power value of the new energy; determining the power command value of the hydrogen production load according to the power value of the hydrogen production load and the maximum working power value of the hydrogen production load; and performing the first coordinated control based on the power command value of the new energy and the power command value of the hydrogen production load.

[0007] According to some embodiments, a second coordinated control is performed on off-grid renewable energy hydrogen production based on a preset transient control mode, including: comparing a preset system rated frequency with a current system frequency according to the transient control mode; obtaining a corresponding hydrogen production power supply power response determination mode based on the comparison result; and performing a second coordinated control based on the hydrogen production power supply power response determination mode.

[0008] According to some embodiments, the comparison results include the result that the current frequency of the system is greater than the rated frequency of the system, the result that the current frequency of the system is less than the rated frequency of the system, and the result that the current frequency of the system is equal to the rated frequency of the system; wherein, according to the hydrogen production power supply power response determination mode, the second coordinated control is performed, including: obtaining the initial power of the hydrogen production power supply, the rated power of the hydrogen production power supply, the lower limit of the frequency adjustment dead zone, the upper limit of the frequency adjustment dead zone and the system adjustment rate; according to the hydrogen production power supply power response determination mode, when the current frequency of the system is greater than the rated frequency of the system, the hydrogen production power supply power response value is determined according to the initial power of the hydrogen production power supply, the rated power of the hydrogen production power supply, the lower limit of the frequency adjustment dead zone and the system adjustment rate, so as to perform the second coordinated control based on the hydrogen production power supply power response value; according to the hydrogen production power supply power response determination mode, when the current frequency of the system is less than the rated frequency of the system, the hydrogen production power supply power response value is determined according to the initial power of the hydrogen production power supply, the rated power of the hydrogen production power supply, the upper limit of the frequency adjustment dead zone and the system adjustment rate, so as to perform the second coordinated control based on the hydrogen production power supply power response value; when the current frequency of the system is equal to the rated frequency of the system, the second coordinated control is not performed.

[0009] According to some embodiments, a third coordinated control is performed on off-grid renewable energy hydrogen production based on a preset emergency control mode, including: determining a power adjustment margin according to the emergency control mode and a corresponding overshoot parameter; determining a power adjustment command value according to the power adjustment margin and the emergency control mode; and performing a third coordinated control according to the power adjustment command value.

[0010] According to some embodiments, when the current frequency of the system is still not within the regulation dead zone, the power value to be cut off of off-grid renewable energy hydrogen production is determined according to the preset over-cutting principle, including: judging whether the power adjustment margin matches the preset power margin condition; if matched, judging whether the current frequency of the system is within the regulation dead zone at the preset regulation waiting end time to determine whether to re-perform the third coordinated control; if not matched, determining the power value to be cut off based on the real-time calculated energy storage overload, the power adjustment margin, the acquired energy storage rated power and the preset over-cutting coefficient.

[0011] According to some embodiments, the power adjustment margin includes a power increase margin and a power decrease margin; wherein, the power value to be cut off is determined according to the real-time calculated energy storage overload, the power adjustment margin, the obtained energy storage rated power and the preset over-cut coefficient, including: when the energy storage overload is equal to 0, the power value to be cut off is determined to be 0; when the energy storage overload is greater than 0, the load power to be cut off is determined according to the energy storage overload, the power increase margin, the energy storage rated power and the over-cut coefficient; when the energy storage overload is less than 0, the new energy power to be cut off is determined according to the energy storage overload, the power decrease margin, the energy storage rated power and the over-cut coefficient; the load power to be cut off and the new energy power to be cut off are determined as the power value to be cut off.

[0012] According to one aspect of the present application, a coordinated control device for off-grid renewable energy hydrogen production is proposed, comprising:

[0013] A first coordination control module is used to perform a first coordination control on off-grid renewable energy hydrogen production based on a preset steady-state control mode when the measured current frequency of the system is within a preset regulation dead zone;

[0014] A second coordination control module is used to perform a second coordination control on off-grid renewable energy hydrogen production based on a preset transient control mode when the current frequency of the system is not within the regulation dead zone;

[0015] A third coordinated control module is used to perform a third coordinated control on off-grid renewable energy hydrogen production based on a preset emergency control mode after the second coordinated control when the current frequency of the system is still not within the regulation dead zone;

[0016] The cutting module is used to determine the power value to be cut off for off-grid renewable energy hydrogen production according to a preset over-cutting principle when the current frequency of the system is still not within the regulation dead zone after the third coordinated control.

[0017] Optionally, when the first coordinated control module performs the first coordinated control on the off-grid renewable energy hydrogen production based on the preset steady-state control mode, it is specifically used to:

[0018] Obtain the current power generation power of new energy, the maximum charging power limit of energy storage, the current power of energy storage, the current power of hydrogen production load, the current predicted maximum power value of new energy and the maximum working power value of hydrogen production load;

[0019] Determine the maximum power value of the new energy source based on the steady-state control mode, the current power generation of the new energy source, the maximum charging power limit of the energy storage and the current power of the energy storage;

[0020] Determine the hydrogen production load power value according to the current power of the hydrogen production load and the current power of the energy storage;

[0021] Determine the power command value of the new energy according to the maximum power value of the new energy and the current predicted maximum power value of the new energy;

[0022] Determine the hydrogen production load power instruction value according to the hydrogen production load power value and the maximum working power value of the hydrogen production load;

[0023] Based on the new energy power command value and the hydrogen production load power command value, a first coordinated control is performed.

[0024] Optionally, when the second coordinated control module performs the second coordinated control on the off-grid renewable energy hydrogen production based on the preset transient control mode, it is specifically used to:

[0025] According to the transient control mode, the preset system rated frequency is compared with the current system frequency;

[0026] According to the comparison result, the corresponding hydrogen production power supply power response determination mode is obtained;

[0027] The mode is determined according to the power response of the hydrogen production power supply, and the second coordinated control is performed.

[0028] Optionally, the comparison result includes a result that the current frequency of the system is greater than the rated frequency of the system, a result that the current frequency of the system is less than the rated frequency of the system, and a result that the current frequency of the system is equal to the rated frequency of the system; when the second coordinated control module determines the mode according to the power response of the hydrogen production power supply and performs the second coordinated control, it is specifically used to:

[0029] Obtain the initial power of the hydrogen production power supply, the rated power of the hydrogen production power supply, the lower limit of the frequency regulation dead zone, the upper limit of the frequency regulation dead zone and the system adjustment rate;

[0030] According to the hydrogen production power supply power response determination mode, when the current system frequency is greater than the system rated frequency, the hydrogen production power supply power response value is determined according to the hydrogen production power supply initial power, the hydrogen production power supply rated power, the frequency adjustment dead zone lower limit and the system adjustment rate, so as to perform the second coordinated control based on the hydrogen production power supply power response value;

[0031] According to the hydrogen production power supply power response determination mode, when the current system frequency is less than the system rated frequency, the hydrogen production power supply power response value is determined according to the hydrogen production power supply initial power, the hydrogen production power supply rated power, the frequency adjustment dead zone upper limit and the system adjustment rate, so as to perform the second coordinated control based on the hydrogen production power supply power response value;

[0032] When the current system frequency is equal to the rated system frequency, the second coordinated control is not performed.

[0033] Optionally, when the third coordinated control module performs the third coordinated control on the off-grid renewable energy hydrogen production based on the preset emergency control mode, it is specifically used to:

[0034] Determine the power adjustment margin according to the emergency control mode and the corresponding overshoot parameter;

[0035] Determine the power regulation command value according to the power regulation margin and the emergency control mode;

[0036] The third coordinated control is performed according to the power adjustment command value.

[0037] The resection module may be specifically used for:

[0038] Determining whether the power adjustment margin matches a preset power margin condition;

[0039] In the case of matching, at the preset adjustment waiting end time, it is determined whether the current frequency of the system is within the adjustment dead zone range to determine whether to re-perform the third coordinated control;

[0040] In the case of mismatch, the power value to be cut off is determined based on the real-time calculated energy storage overload, power adjustment margin, acquired energy storage rated power and preset overcut coefficient.

[0041] Optionally, the power adjustment margin includes a power increase margin and a power decrease margin; when the removal module determines the power value to be removed according to the real-time calculated energy storage overload, the power adjustment margin, the obtained energy storage rated power and the preset over-cut coefficient, it is specifically used to:

[0042] When the energy storage overload is equal to 0, the power value to be removed is determined to be 0;

[0043] When the energy storage overload is greater than 0, the load power that needs to be cut off is determined based on the energy storage overload, power increase margin, energy storage rated power and overcut coefficient;

[0044] When the energy storage overload is less than 0, the new energy power that needs to be cut off is determined based on the energy storage overload, power reduction margin, energy storage rated power and over-cut coefficient;

[0045] The load power that needs to be cut off and the new energy power that needs to be cut off are determined as the power value to be cut off.

[0046] According to one aspect of the present application, an electronic device is proposed, which includes: a processor; a memory storing a computer program, and when the computer program is executed by the processor, the processor executes the coordinated control method for off-grid new energy hydrogen production as described above.

[0047] According to one aspect of the present application, a non-transitory computer-readable medium is provided, on which readable instructions are stored. When the instructions are executed by a processor, the processor executes the coordinated control method for off-grid renewable energy hydrogen production as described above.

[0048] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application.

[0049] Beneficial effects:

[0050] Through the above embodiments provided by the present application, by setting the regulation dead zone and adopting the steady-state control mode when the current frequency of the system is within the regulation dead zone range, it is possible to ensure that the system maintains a high stability under normal operation. This control mode can reduce unnecessary regulation actions and avoid oscillations caused by frequent regulation of the system, thereby extending the life of the equipment and improving the reliability of the system. When the system frequency exceeds the regulation dead zone range, the control method automatically switches to the transient control mode for the second coordinated control. This control mode can quickly respond to changes in the system frequency, quickly return the system frequency to the normal range, effectively suppress the further deterioration of the system frequency, and ensure the safe and stable operation of the power grid and the hydrogen production system. When the transient control cannot restore the system frequency to normal, the control method further switches to the emergency control mode for the third coordinated control. After the emergency control mode, if the system frequency has not returned to normal, the control method will determine the power value to be cut off according to the preset over-cut principle. The load regulation characteristics of the hydrogen production electrolyzer itself are fully considered and tapped to achieve source-load interaction and improve the absorption rate of new energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without exceeding the scope of protection required by the present application.

[0052] Figure 1 A flow chart of a coordinated control method for off-grid renewable energy hydrogen production provided in an embodiment of the present application;

[0053] Figure 2A flowchart for implementing step S10 provided in an embodiment of the present application;

[0054] Figure 3 A flowchart for implementing the second coordinated control of off-grid renewable energy hydrogen production based on a preset transient control mode in step S11 provided in an embodiment of the present application;

[0055] Figure 4 A flowchart for implementing the second coordinated control according to the power response determination mode of the hydrogen production power supply in step S111 provided in the embodiment of the present application;

[0056] Figure 5 A flowchart for implementing the third coordinated control of off-grid renewable energy hydrogen production based on a preset emergency control mode in step S12 provided in an embodiment of the present application;

[0057] Figure 6 A flowchart for implementing step S13 provided in an embodiment of the present application;

[0058] Figure 7 A flowchart for implementing step S131 provided in an embodiment of the present application;

[0059] Figure 8 A schematic diagram of the structure of a hydrogen production device provided in an embodiment of the present application;

[0060] Fig. 9 A block diagram of a coordinated control device for off-grid renewable energy hydrogen production provided in an embodiment of the present application;

[0061] Fig.10 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0062] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0063] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0064] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0065] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0066] It should be understood that although the terms first, second, third, etc. may be used herein to describe various components, these components should not be limited by these terms. These terms are used to distinguish one component from another component. Therefore, the first component discussed below can be referred to as the second component without departing from the teachings of the concepts of the present application. As used herein, the term "and / or" includes any one of the associated listed items and all combinations of one or more.

[0067] For specific implementation methods, please refer to the following embodiments.

[0068] Figure 1 This is a flow chart of the coordinated control method for off-grid renewable energy hydrogen production provided in the embodiment of the present application. The method of this embodiment can be applied to the coordinated control server. Figure 1 As shown, the method includes: step S10, step S11, step S12 and step S13.

[0069] In step S10, when the measured current frequency of the system is within the preset regulation dead zone, a first coordinated control is performed on off-grid renewable energy hydrogen production based on a preset steady-state control mode.

[0070] In the present application, the current frequency of the system can be used to indicate the operating frequency of the off-grid hydrogen production system. The adjustment dead zone range can be pre-set to indicate the frequency range of stable operation of the system. The steady-state control mode can include a specific operation mode, which can be a control instruction generated based on historical coordinated control data and stored in advance. The first coordinated control process is a specific operation corresponding to the steady-state control mode.

[0071] According to the example embodiment, the current frequency of the system at the current moment is detected in real time, and then the current frequency of the system is compared with the preset dead zone range of regulation. If the current frequency of the system is not within the preset dead zone range of regulation, the preset steady-state control mode can be called to perform the first coordinated control on the off-grid new energy hydrogen production process.

[0072] In step S11, when the current frequency of the system is not within the regulation dead zone, a second coordinated control is performed on off-grid renewable energy hydrogen production based on a preset transient control mode.

[0073] In the present application, the transient control mode can be a control mode that is pre-implemented when the operation of the hydrogen production system is unstable. The transient control mode can be pre-set and stored based on historical coordinated control data. The second coordinated control is the specific operation corresponding to the transient control mode, which can include the power-frequency response value of the hydrogen production power supply.

[0074] According to the example embodiment, if the measured current frequency of the system is not within the regulation dead zone, it means that the operation of the hydrogen production system is not very stable. At this time, the pre-set and stored transient control mode can be called to perform a second coordinated control on the off-grid new energy hydrogen production process.

[0075] In step S12, after the second coordinated control, when the current frequency of the system is still not within the regulation dead zone, a third coordinated control is performed on the off-grid renewable energy hydrogen production based on a preset emergency control mode.

[0076] In this application, the emergency control mode is a control mode when the unstable state of the hydrogen production system cannot be restored to stability through the second coordinated control. The emergency control mode can also be pre-set and stored through historical coordinated control data, and the third coordinated control is the specific operation process corresponding to the emergency control mode.

[0077] According to an exemplary embodiment, after the second coordinated control is performed, if the current frequency of the system is still not within the adjustment dead zone, a pre-set and stored emergency control mode is called to perform the third coordinated control.

[0078] In step S13, after the third coordinated control, when the current frequency of the system is still not within the regulation dead zone, the power value to be cut off for off-grid renewable energy hydrogen production is determined according to the preset over-cut principle.

[0079] In this application, the over-cut principle is that when the hydrogen production system still cannot recover stability after the emergency control mode, it is necessary to cut off certain non-critical load power / new energy power. It can be pre-set and stored according to historical coordinated control data.

[0080] According to an example embodiment, after the third coordinated control, if the current frequency of the system is not within the regulation dead zone, the preset over-cut principle can be called to calculate the power value to be cut off for off-grid renewable energy hydrogen production, so as to restore the operating state of the hydrogen production system to stability.

[0081] This application sets a regulation dead zone and adopts a steady-state control mode when the current frequency of the system is within the regulation dead zone, which can ensure that the system maintains a high stability under normal operation. This control mode can reduce unnecessary regulation actions and avoid oscillations caused by frequent adjustments in the system, thereby extending the life of the equipment and improving system reliability. When the system frequency exceeds the regulation dead zone range, the control method automatically switches to the transient control mode for the second coordinated control. This control mode can quickly respond to changes in the system frequency, quickly return the system frequency to the normal range, effectively suppress the further deterioration of the system frequency, and ensure the safe and stable operation of the power grid and hydrogen production system. When transient control cannot restore the system frequency to normal, the control method further switches to the emergency control mode for the third coordinated control. After the emergency control mode, if the system frequency has not returned to normal, the control method will determine the power value to be cut off for off-grid new energy hydrogen production according to the preset over-cut principle. Fully consider and tap the load regulation characteristics of the hydrogen production electrolyzer itself, realize source-load interaction, and improve the absorption rate of new energy.

[0082] According to some embodiments, reference Figure 2 In step S10, a first coordinated control is performed on off-grid renewable energy hydrogen production based on a preset steady-state control mode, which can be specifically implemented through steps S100, S101, S102 and S103.

[0083] In step S100, the current power generation power of the new energy, the maximum charging power limit of the energy storage, the current power of the energy storage, the current power of the hydrogen production load, the current predicted maximum power value of the new energy and the maximum working power value of the hydrogen production load are obtained.

[0084] In this application, the current power generation power of new energy refers to the actual electric power output by the hydrogen production system at the current moment; the maximum charging power limit of energy storage refers to the maximum charging power that the energy storage system of the hydrogen production system can receive per unit time; the current power of energy storage refers to the charging or discharging power of the energy storage system at the current moment; the current power of hydrogen production load refers to the power actually consumed by the hydrogen production system at the current moment; the current predicted maximum power value of new energy refers to the maximum power generation power that the hydrogen production system may reach in the future based on current weather conditions, historical data and other relevant factors; the maximum operating power value of hydrogen production load refers to the maximum power value that the hydrogen production system can reach under design or operating conditions.

[0085] According to the exemplary embodiment, the current power generation power P of the new energy source which is pre-stored or detected in real time can be directly obtained. dg_out 、Maximum charging power limit of energy storage P lim_charg 、Current power of energy storage P bess_out 、Current power of hydrogen production load P hload_out 、The current predicted maximum power value of new energy P dg_pre_maxand the maximum operating power value of hydrogen production load P hload_max .

[0086] In step S101, the maximum power value of the new energy is determined according to the steady-state control mode, the current power generation power of the new energy, the maximum charging power limit of the energy storage and the current power of the energy storage; the power value of the hydrogen production load is determined according to the current power of the hydrogen production load and the current power of the energy storage.

[0087] According to an example embodiment, the maximum power value of the new energy source may be P dg_cal , the hydrogen production load power value can be P hload_cal The calculation methods corresponding to the steady-state control mode may include:

[0088] P dg_cal =P dg_out +P lim_charg +P bess_out ;

[0089] P hload_cal =P hload_out -P bess_out .

[0090] The new energy maximum power value and hydrogen production load power value are calculated in the above manner.

[0091] In step S102, the new energy power command value is determined according to the new energy maximum power value and the current predicted maximum power value of the new energy; the hydrogen production load power command value is determined according to the hydrogen production load power value and the maximum working power value of the hydrogen production load.

[0092] According to an example embodiment, the new energy power command value is determined to be P dg_out_cmd , the hydrogen production load power instruction value is P hload_cmd The calculation method corresponding to the steady-state control mode also includes:

[0093] P dg_out_cmd =min(P dg_cal ,P dg_pre_max );

[0094] P hload_cmd =min(P hload_cal ,P hload_max ).

[0095] Through the above method, the minimum value can be selected from the two parameters in the brackets to determine the corresponding new energy power command value and hydrogen production load power command value respectively.

[0096] In step S103, a first coordinated control is performed based on the new energy power command value and the hydrogen production load power command value.

[0097] According to the new energy power command value and the hydrogen production load power command value calculated in step S102, corresponding parameter adjustments are performed to achieve the first coordinated control.

[0098] This application adopts a steady-state control mode so that the hydrogen production system can maintain a relatively stable operating state when facing fluctuations in renewable energy power generation. By rationally allocating renewable energy power generation to the energy storage system and hydrogen production load, the adverse effects of power fluctuations on system stability are reduced, ensuring the continuity and safety of the hydrogen production process. According to the current power of the hydrogen production load and the state of the energy storage system, the power value of the hydrogen production load is dynamically adjusted to ensure that the hydrogen production process is neither overloaded nor too conservative, thereby maximizing hydrogen production efficiency while ensuring equipment safety.

[0099] According to an example embodiment, referring to Figure 3 In step S11, a second coordinated control is performed on off-grid renewable energy hydrogen production based on a preset transient control mode, which can be specifically implemented through steps S110 and S111.

[0100] In step S110, according to the transient control mode, the preset system rated frequency is compared with the system current frequency.

[0101] In this application, the system rated frequency refers to the standard frequency preset in the design and operation of the hydrogen production system. The system current frequency refers to the frequency value actually reached by the hydrogen production system at the current moment in real-time operation.

[0102] According to an exemplary embodiment, a preset system rated frequency is directly obtained, the current system frequency at the current moment is detected, and the two frequency values ​​are compared in magnitude.

[0103] In step S111, the corresponding hydrogen production power supply power response determination mode is acquired according to the comparison result; and the second coordinated control is performed according to the hydrogen production power supply power response determination mode.

[0104] In the present application, a hydrogen production power supply power response determination mode under different comparison results can be preset, and the determination mode can include a specific calculation method. In the transient control mode, when the system rated frequency is equal to the system current frequency, it means that the operation of the hydrogen production system is in a stable state.

[0105] According to the example embodiment, the corresponding hydrogen production power supply power response determination mode can be found based on the comparison result, and then calculations can be performed according to the hydrogen production power supply power response determination mode to obtain relevant parameters for second coordinated control.

[0106] Through the preset transient control mode, the hydrogen production system of this application can respond to and cope with frequency fluctuations in a timely manner, especially when the current frequency of the system deviates from the preset system rated frequency, which can reduce potential problems caused by frequency fluctuations. The second coordinated control of off-grid new energy hydrogen production based on the transient control mode means that the system can dynamically adjust the power output of the hydrogen production power supply according to the operating conditions at different frequencies. This helps to maximize the utilization of energy and avoid excessive consumption or waste of energy when the frequency is unstable. By comparing the current frequency of the system with the preset rated frequency and adjusting the power response mode of the hydrogen production power supply accordingly, it has a high degree of adaptability and flexibility.

[0107] According to some embodiments, the above comparison results include a result that the current system frequency is greater than the rated system frequency, a result that the current system frequency is less than the rated system frequency, and a result that the current system frequency is equal to the rated system frequency. Figure 4 In step S111, the mode is determined according to the power response of the hydrogen production power supply, and the second coordinated control is performed, which can be specifically implemented through steps S1110, S1111 and S1112.

[0108] In step S1110, the initial power of the hydrogen production power supply, the rated power of the hydrogen production power supply, the lower limit of the frequency regulation dead zone, the upper limit of the frequency regulation dead zone and the system adjustment rate are obtained.

[0109] In this application, the initial power of the hydrogen production power supply is the power output of the power supply of the hydrogen production system at startup or in the initial state; the rated power of the hydrogen production power supply refers to the maximum power that the hydrogen production power supply can continuously and stably output under standard working conditions; the lower and upper limits of the frequency regulation dead zone are ranges set in the hydrogen production system to prevent frequent adjustments of generator sets or power equipment when the grid frequency fluctuates within a small range. The system differential rate can be used to characterize the relative amount of change in parameters such as the main control valve position or output power of the generator set or power equipment when the system frequency changes by a certain percentage. The differential rate can reflect the sensitivity and responsiveness of the regulation system to frequency changes.

[0110] According to an example embodiment, the initial power P of the hydrogen production power source is h_Pwr0 , Rated power of hydrogen production power supply P h_Pwr_rate , Frequency regulation dead zone lower limit f d_down , frequency regulation dead zone upper limit f d_up and the system adjustment rate δ%, can be preset, detected and stored, and can be directly obtained.

[0111] In step S1111, according to the hydrogen production power supply power response determination mode, when the current system frequency is greater than the system rated frequency, the hydrogen production power supply power response value is determined according to the hydrogen production power supply initial power, the hydrogen production power supply rated power, the frequency adjustment dead zone lower limit and the system adjustment rate, so as to perform the second coordinated control based on the hydrogen production power supply power response value.

[0112] According to an exemplary embodiment, the current frequency f of the system detected in real time cal , greater than the pre-stored system rated frequency f N Under the condition of h_Pwr_cmd The power response determination mode of the hydrogen production power supply is:

[0113]

[0114] The initial power of the hydrogen production power supply, the rated power of the hydrogen production power supply, the lower limit of the frequency adjustment dead zone and the system adjustment rate are brought into this mode for calculation to obtain the corresponding hydrogen production power response value. The operating parameters are adjusted by the response value to achieve the second coordinated control.

[0115] In step S1112, according to the hydrogen production power supply power response determination mode, when the current system frequency is less than the system rated frequency, the hydrogen production power supply power response value is determined according to the hydrogen production power supply initial power, the hydrogen production power supply rated power, the frequency adjustment dead zone upper limit and the system adjustment rate, so as to perform the second coordinated control based on the hydrogen production power supply power response value; when the current system frequency is equal to the system rated frequency, the second coordinated control is not performed.

[0116] According to an exemplary embodiment, the current frequency f of the system detected in real time cal , which is less than the pre-stored system rated frequency f N Under the condition of h_Pwr_cmd The power response determination mode of the hydrogen production power supply is:

[0117]

[0118] The initial power of the hydrogen production power supply, the rated power of the hydrogen production power supply, the upper limit of the frequency adjustment dead zone and the system adjustment rate are brought into this mode for calculation to obtain the corresponding hydrogen production power response value. The operating parameters are adjusted by the response value to achieve the second coordinated control.

[0119] When the current system frequency is equal to the rated system frequency, the operation of the hydrogen production system is in a stable state and there is no need to perform the second coordinated control.

[0120] This application dynamically adjusts the power output of the hydrogen-producing power supply by real-time monitoring and responding to the difference between the current frequency and the rated frequency of the system. When the system frequency deviates from the rated value, the power response value of the hydrogen-producing power supply can be quickly and accurately determined, thereby achieving rapid load regulation and enhancing the flexibility and response speed of the system. By setting the lower and upper limits of the frequency adjustment dead zone, unnecessary adjustments to the hydrogen-producing power supply when the system frequency fluctuates slightly are avoided, reducing energy waste and unnecessary loss of equipment. By setting clear control logic (determining the mode) and parameters, automatic control of the power response of the hydrogen-producing power supply is achieved, improving the accuracy and timeliness of the control.

[0121] According to some embodiments, reference Figure 5 In step S12, the third coordinated control of off-grid renewable energy hydrogen production is performed based on the preset emergency control mode, which can be specifically implemented through steps S120 and S121.

[0122] In step S120 , a power adjustment margin is determined according to the emergency control mode and the corresponding overshoot parameter.

[0123] In this application, the overshoot parameter includes the current predicted maximum power value P of the new energy source. dg_pre_max , the current power generation of new energy P dg_out , the minimum power generation of new energy P dg_min , the current power generation of new energy P dg_out , the minimum power P of the proton exchange membrane electrolyzer hydrogen production load that can be adjusted pemhload_min , the maximum power P that can be adjusted for hydrogen production load in the proton exchange membrane electrolyzer pemhload_max , the current power value P of the proton exchange membrane electrolyzer hydrogen production load pemhload_out , energy storage rated power P bess_rate , overshoot coefficient m regu ; Energy storage current power P bess_out , maximum discharge limit of energy storage P bess_lim_discharg , maximum charging limit of energy storage P bess_lim_charg These parameters can be detected and stored in real time for direct access.

[0124] According to an example embodiment, the calculation process corresponding to the emergency control mode includes:

[0125] ΔP dg_back_up =P dg_pre_max -P dg_out ;

[0126] ΔP dg_back_down =P dg_out -P dg_min ;

[0127] ΔP hload_back_up =P pemhload_max -Ppemhload_out ;

[0128] ΔP hload_back_down =P pemhload_out -P pemhload_min ;

[0129] ΔP regu_back_up =ΔP dg_back_up +ΔP hload_back_down ;

[0130] ΔP regu_back_down =ΔP dg_back_down +ΔP hload_back_up .

[0131] Among them, ΔP dg_back_up The margin for increasing the power of new energy is ΔP dg_back_down The margin for the reduction of new energy power, ΔP hload_back_up is the hydrogen production load power increase margin, ΔP hload_back_down is the power reduction margin of hydrogen production load, ΔP regu_back_up Power up-regulation margin, ΔP regu_back_down Provide margin for power reduction.

[0132] The margins calculated by the above calculation formula are taken as a power adjustment margin.

[0133] In step S121, a power adjustment instruction value is determined according to the power adjustment margin and the emergency control mode; and a third coordinated control is performed according to the power adjustment instruction value.

[0134] According to an example embodiment, the calculation process corresponding to the emergency control mode further includes:

[0135] In P bess_out If it is greater than or equal to zero,

[0136] ΔP bess =P bess_out -P bess_lim_discharg ;

[0137] In P bess_out When it is less than zero,

[0138] ΔP bess =P bes s _out +P bess_lim_charg .

[0139] Among them, ΔP bess is the energy storage overload.

[0140] The calculation process corresponding to the emergency control mode also includes:

[0141] In ΔP bessWhen it is greater than 0,

[0142] ΔP regu_out_cmd =min(ΔP regu_back_up ,ΔP bess +m regu *P bess_rate );

[0143] In ΔP bess When it is less than 0,

[0144]

[0145] Among them, ΔP regu_out_cmd That is, the power adjustment command value, and then the relevant parameters can be adjusted according to the power adjustment command value to achieve the third coordinated control.

[0146] This application uses a preset emergency control mode to quickly start the corresponding control strategy when an emergency situation is detected, without relying on human intervention or a long decision-making process, thereby greatly shortening the response time and improving the emergency response capability of the system. This rapid response mechanism is crucial to ensuring system safety and reducing potential losses. The power adjustment margin is determined according to the emergency control mode and the corresponding overshoot parameter, and then an accurate power adjustment command value is generated, thereby achieving fine control of the output power of the new energy hydrogen production system. This precise control not only helps to quickly stabilize the system state in an emergency, but also effectively avoids waste of resources or system damage caused by over-adjustment.

[0147] According to an example embodiment, referring to Figure 6 , step S13 can be specifically implemented through step S130 and step S131.

[0148] In step S130, it is determined whether the power adjustment margin matches the preset power margin condition; if matched, at the preset adjustment waiting end time, it is determined whether the current frequency of the system is within the adjustment dead zone to determine whether to re-perform the third coordinated control.

[0149] In the present application, after the third coordinated control is performed, a period of time may be waited for the relevant equipment in the hydrogen production system to complete the response. This period of time may be selected to be several hundred milliseconds, and the corresponding end time may be the preset adjustment waiting end time.

[0150] According to an example embodiment, the preset power margin condition is:

[0151] 0<ΔP regu_back_up <ΔP bess , or, ΔP bess< -ΔP regu_back_down <0.

[0152] The power adjustment margin and the power adjustment margin in the power adjustment margin are matched with the preset power margin conditions. If they match, it is determined whether the current frequency of the system is within the adjustment dead zone at the corresponding preset adjustment waiting end time. If it is within the adjustment dead zone, it means that the operation of the hydrogen production system is in a stable state. If it is not within the adjustment dead zone, the third coordinated control is re-performed according to the above steps.

[0153] In step S131, in the case of mismatch, the power value to be cut off is determined according to the real-time calculated energy storage overload, the power adjustment margin, the acquired energy storage rated power and the preset overcut coefficient.

[0154] According to the exemplary embodiment, if there is no match, the pre-stored energy storage rated power can be obtained, and the power value to be cut off can be calculated according to the energy storage overload, power adjustment margin, energy storage rated power and preset overcut coefficient calculated in step S121. Then, the pre-set calculation method can be obtained, and the aforementioned parameters can be substituted for calculation to obtain the power value to be cut off.

[0155] This application first determines whether the power adjustment margin matches the preset conditions, which helps to take more conservative or more proactive measures when necessary. When the power adjustment margin is sufficient, the system will consider whether to wait longer to observe the natural recovery of the frequency, thereby avoiding unnecessary power removal; when the margin is insufficient, the power value to be removed is immediately calculated based on real-time data and preset parameters to ensure the rationality of the decision. When determining the power value to be removed, not only the energy storage overload, which directly reflects the current state of the system, is considered, but also multiple factors such as the power adjustment margin, the rated power of the energy storage, and the preset over-cut coefficient. This multi-factor comprehensive evaluation method makes the power removal decision more comprehensive and scientific, and helps to improve the efficiency and effectiveness of system regulation.

[0156] According to some embodiments, the power adjustment margin includes a power up adjustment margin and a power down adjustment margin. Figure 7 , step S131 can be specifically implemented through step S1310 and step S1311.

[0157] In step S1310, when the energy storage overload is equal to 0, the power value to be removed is determined to be 0.

[0158] According to an exemplary embodiment, at the energy storage overload ΔP bess When it is equal to 0, no cutting is required, that is, the power value to be cut off is 0.

[0159] In step S1311, when the energy storage overload is greater than 0, the load power to be cut off is determined based on the energy storage overload, the power increase margin, the energy storage rated power and the over-cut coefficient; when the energy storage overload is less than 0, the new energy power to be cut off is determined based on the energy storage overload, the power decrease margin, the energy storage rated power and the over-cut coefficient; the load power to be cut off and the new energy power to be cut off are determined as the power values ​​to be cut off.

[0160] According to an example embodiment, the specific calculation method of the power value to be removed may be:

[0161] In ΔP bess >0, ΔP load_shed =ΔP bess -ΔP regu_back_up +m shed *P bess_rate ;

[0162] In ΔP bess <0, ΔP dg_shed =-(ΔP bess +ΔP regu_back_down -+m shed *P bess_rate ).

[0163] Among them, ΔP load_shed is the load power that needs to be removed, ΔP dg_shed is the new energy power that needs to be removed, m shed is the over-cut coefficient. When the energy storage overload is greater than 0, the load power to be cut is calculated as the power value to be cut; when the energy storage overload is less than 0, the new energy power to be cut is calculated as the power value to be cut.

[0164] In some implementations, the removal priority of different new energy sources and loads can be preset according to the importance of the equipment in the hydrogen production process. For example, the power value of a lighting device can be used as the power value to be removed first when removal is required.

[0165] This application does not take any removal measures when the energy storage overload is equal to 0, thus avoiding unnecessary power adjustment. When the energy storage overload is greater than or less than 0, the amount of power to be removed is determined based on the specific value of the overload and the corresponding power adjustment margin, which helps to ensure that the energy storage system operates within a safe range. By comprehensively considering multiple factors such as the energy storage overload, power adjustment margin, energy storage rated power, and over-cut coefficient to determine the power value to be removed, this strategy can ensure that the stability and safety of the system will not be excessively affected when the power is removed. This balanced consideration helps to reduce system fluctuations and potential risks caused by power removal.

[0166] According to other embodiments, Figure 8 This is a schematic diagram of the structure of the hydrogen production device provided in the embodiment of the present application. Figure 8 , this application can use 4 10MW photovoltaics, 10MW / 40MWh grid energy storage, proton exchange membrane electrolyzer hydrogen production load rated power of 5MW, alkaline water electrolyzer hydrogen production load rated power of 3×5MW=15MW. The minimum power generation of photovoltaics is 0.1 times the rated value, that is, the minimum power generation of new energy is 40×0.1=4MW. The grid energy storage can provide a maximum of 3 times the rated overload power for 10s; the safe operating range of the proton exchange membrane electrolyzer hydrogen production and alkaline water electrolyzer hydrogen production load is 0.3 to 1.3 times the rated power, then the rated power of the hydrogen production load is 15+5=20MW, the maximum load power of the proton exchange membrane hydrogen production is 1.3×5=6.5MW, the minimum load power of the proton exchange membrane hydrogen production is 0.3×5=1.5MW, the maximum working power value of the hydrogen production load is 1.3×20=26MW, the minimum working power value of the hydrogen production load is 0.3×20=6MW; the hydrogen production load system adjustment rate is 5%. The lower limit of the frequency regulation dead zone is 49.90Hz, the upper limit of the frequency regulation dead zone is 50.10Hz, and the maximum charging limit of the energy storage and the maximum charging limit are both rated power 10MW.

[0167] Assume that the system frequency is stable at 50Hz in the initial stage. At this time, the power of renewable energy generation is 20MW, the current power of hydrogen production load is 20MW, the energy storage discharge power is 0MW, and the system operates in steady-state control mode.

[0168] If the current predicted maximum power value of new energy changes to 40MW and remains unchanged, according to the steady-state control mode, with the goal of maximizing new energy power generation, the power of new energy and hydrogen production load is periodically adjusted to achieve power balance, and the new energy command is periodically adjusted with a period of 100ms. The new energy power command value is:

[0169] P dg_cal =20+10+0=30MW;

[0170] P dg_out_cmd =min(30,40)=30MW.

[0171] After adjustment, the new energy power generation capacity is 30MW, the energy storage capacity is -10MW (charging state), and the hydrogen production load capacity is 20MW.

[0172] According to the steady-state control mode, the hydrogen production load power is periodically adjusted with a period of 1 minute:

[0173] P hload_cal =20-(-10)=30MW;

[0174] P hload_cmd=min(30,26)=26MW.

[0175] After adjustment, the renewable energy power generation capacity is 30MW, the energy storage capacity is -10MW (charging state), and the hydrogen production load capacity is 26MW. Both the hydrogen production load and the energy storage charging capacity have reached their maximum values, achieving the maximum photovoltaic power generation under power balance under stable system operation.

[0176] If the power of renewable energy suddenly drops by 80% due to weather conditions under the above stable operation, that is, it is reduced to 30×0.2=6MW, then the grid energy storage will instantly increase its output to 20MW (discharge state), and the hydrogen production load power is 26MW. The grid energy storage is running in an overload state. Because the grid energy storage is differentially regulated, assuming that the current system measurement frequency is 49Hz, which exceeds the frequency dead zone limit, it first enters the transient control mode, and the instantaneous support power value of the hydrogen production power supply is:

[0177]

[0178] At this time, the new energy power generation capacity is 6MW, the hydrogen production load power is 19.8MW, the proton membrane exchange membrane hydrogen production load power is 19.8÷4=4.95MW (assuming that the 4 electrolyzers distribute power evenly), the grid energy storage power is 13.8MW (discharge state), the energy storage is still in an overload state, and the system frequency still exceeds the frequency dead zone, entering the emergency control mode.

[0179] After the power frequency control of the grid energy storage and hydrogen production power supply, if the system frequency still exceeds the frequency dead zone, it will enter the emergency control mode: according to the energy storage overload, first adopt the new energy power rapid adjustment and hydrogen production load rapid adjustment measures to ensure the system power balance:

[0180] First calculate the energy storage overload: ΔP bess =13.8-10=3.8MW.

[0181] Further calculation of renewable energy power generation, the adjustable margin of proton exchange membrane electrolyzer load power, according to the overshoot principle, m regu It is set to 0.1, because the accident assumed this time is a sudden drop in new energy, and the new energy adjustment margin is 0, then only the hydrogen production load has the adjustment capability. The power adjustment amount of the hydrogen production load is:

[0182] ΔP dg_back_up =0;

[0183] ΔP hload_back_up =4.95-1.3=3.65MW;

[0184] ΔP regu_back_up =3.65MW;

[0185] ΔPregu_out_cmd =min(3.65,3.8+0.1*10)=3.65MW.

[0186] At this time, the power of renewable energy generation is 6MW, the total power of hydrogen production load is 19.8-3.65=16.15MW, the grid energy storage power is 10.15MW (discharge state), and the energy storage is still in an overload state. It is necessary to further cut off the hydrogen production load, m shed Set it to 0.1, according to the overcut principle, the cut-off power calculation value is:

[0187] ΔP load_shed =3.8-3.65+0.1*10=1.15MW.

[0188] According to the pre-set load priority, 1.15MW of load is removed. At this time, the renewable energy power generation is 6MW, the total hydrogen production load power is 16.15-1.15=15MW, and the energy storage power is 9MW. The system frequency returns to normal (within the adjustment dead zone) and returns to the steady-state control mode.

[0189] The following describes an apparatus embodiment of the present application, which can be used to execute the method embodiment of the present application. For details not disclosed in the apparatus embodiment of the present application, reference can be made to the method embodiment of the present application.

[0190] Fig. 9 This is a block diagram of a coordinated control device for off-grid renewable energy hydrogen production provided in an embodiment of the present application. Fig. 9 As shown, the coordination control device 900 for off-grid renewable energy hydrogen production includes a first coordination control module 901 , a second coordination control module 902 , a third coordination control module 903 and a removal module 904 .

[0191] The first coordinated control module 901 is used to perform a first coordinated control on off-grid renewable energy hydrogen production based on a preset steady-state control mode when the measured current system frequency is within a preset regulation dead zone;

[0192] The second coordinated control module 902 is used to perform a second coordinated control on off-grid renewable energy hydrogen production based on a preset transient control mode when the current frequency of the system is not within the regulation dead zone;

[0193] The third coordinated control module 903 is used to perform a third coordinated control on off-grid renewable energy hydrogen production based on a preset emergency control mode when the current frequency of the system is still not within the regulation dead zone after the second coordinated control;

[0194] The cutting module 904 is used to determine the power value to be cut off for off-grid renewable energy hydrogen production according to a preset over-cutting principle when the current frequency of the system is still not within the regulation dead zone after the third coordinated control.

[0195] Optionally, when the first coordinated control module 901 performs the first coordinated control on the off-grid renewable energy hydrogen production based on the preset steady-state control mode, it is specifically used to:

[0196] Obtain the current power generation power of new energy, the maximum charging power limit of energy storage, the current power of energy storage, the current power of hydrogen production load, the current predicted maximum power value of new energy and the maximum working power value of hydrogen production load;

[0197] Determine the maximum power value of the new energy source based on the steady-state control mode, the current power generation of the new energy source, the maximum charging power limit of the energy storage and the current power of the energy storage;

[0198] Determine the hydrogen production load power value according to the current power of the hydrogen production load and the current power of the energy storage;

[0199] Determine the power command value of the new energy according to the maximum power value of the new energy and the current predicted maximum power value of the new energy;

[0200] Determine the hydrogen production load power instruction value according to the hydrogen production load power value and the maximum working power value of the hydrogen production load;

[0201] Based on the new energy power command value and the hydrogen production load power command value, a first coordinated control is performed.

[0202] Optionally, the second coordinated control module 902 is specifically used to:

[0203] According to the transient control mode, the preset system rated frequency is compared with the current system frequency;

[0204] According to the comparison result, the corresponding hydrogen production power supply power response determination mode is obtained;

[0205] The mode is determined according to the power response of the hydrogen production power supply, and the second coordinated control is performed.

[0206] Optionally, the comparison result includes a result that the current frequency of the system is greater than the rated frequency of the system, a result that the current frequency of the system is less than the rated frequency of the system, and a result that the current frequency of the system is equal to the rated frequency of the system; the second coordinated control module 902, when determining the mode according to the power response of the hydrogen production power supply and performing the second coordinated control, is specifically used to:

[0207] Obtain the initial power of the hydrogen production power supply, the rated power of the hydrogen production power supply, the lower limit of the frequency regulation dead zone, the upper limit of the frequency regulation dead zone and the system adjustment rate;

[0208] According to the hydrogen production power supply power response determination mode, when the current system frequency is greater than the system rated frequency, the hydrogen production power supply power response value is determined according to the hydrogen production power supply initial power, the hydrogen production power supply rated power, the frequency adjustment dead zone lower limit and the system adjustment rate, so as to perform the second coordinated control based on the hydrogen production power supply power response value;

[0209] According to the hydrogen production power supply power response determination mode, when the current system frequency is less than the system rated frequency, the hydrogen production power supply power response value is determined according to the hydrogen production power supply initial power, the hydrogen production power supply rated power, the frequency adjustment dead zone upper limit and the system adjustment rate, so as to perform the second coordinated control based on the hydrogen production power supply power response value;

[0210] When the current system frequency is equal to the rated system frequency, the second coordinated control is not performed.

[0211] Optionally, when the third coordinated control module 903 performs the third coordinated control on the off-grid renewable energy hydrogen production based on the preset emergency control mode, it is specifically used to:

[0212] Determine the power adjustment margin according to the emergency control mode and the corresponding overshoot parameter;

[0213] Determine the power regulation command value according to the power regulation margin and the emergency control mode;

[0214] The third coordinated control is performed according to the power adjustment command value.

[0215] Optionally, the resection module 904 is specifically configured to:

[0216] Determining whether the power adjustment margin matches a preset power margin condition;

[0217] In the case of matching, at the preset adjustment waiting end time, it is determined whether the current frequency of the system is within the adjustment dead zone range to determine whether to re-perform the third coordinated control;

[0218] In the case of mismatch, the power value to be cut off is determined based on the real-time calculated energy storage overload, power adjustment margin, acquired energy storage rated power and preset overcut coefficient.

[0219] Optionally, the power adjustment margin includes a power increase margin and a power decrease margin; the removal module 904 is specifically used to:

[0220] When the energy storage overload is equal to 0, the power value to be removed is determined to be 0;

[0221] When the energy storage overload is greater than 0, the load power that needs to be cut off is determined based on the energy storage overload, power increase margin, energy storage rated power and overcut coefficient;

[0222] When the energy storage overload is less than 0, the new energy power that needs to be cut off is determined based on the energy storage overload, power reduction margin, energy storage rated power and over-cut coefficient;

[0223] The load power that needs to be cut off and the new energy power that needs to be cut off are determined as the power value to be cut off.

[0224] The device performs functions similar to the method provided above. For other functions, please refer to the previous description and will not be repeated here.

[0225] Fig.10 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application, such as Fig.10 As shown, the electronic device 1000 of this embodiment may include: a memory 1001 and a processor 1002 .

[0226] The memory 1001 stores a computer program. When the computer program is executed by the processor 1002, the processor 1002 executes the method in the above embodiment.

[0227] The processor 1002 and the memory 1001 are connected, for example, via a bus.

[0228] Optionally, the electronic device 1000 may further include a transceiver. It should be noted that in actual applications, the number of transceivers is not limited to one, and the structure of the electronic device 1000 does not constitute a limitation on the embodiments of the present application.

[0229] Processor 1002 may be a CPU (Central Processing Unit), a general purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of this application. Processor 1002 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0230] The bus may include a path to transmit information between the above components. The bus may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.

[0231] The memory 1001 can be a ROM (Read Only Memory) or other types of static storage devices that can store static information and instructions, a RAM (Random Access Memory) or other types of dynamic storage devices that can store information and instructions, or an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory) or other optical disk storage, optical disk storage (including compressed optical disk, laser disk, optical disk, digital versatile disk, Blu-ray disk, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited to these.

[0232] The memory 1001 is used to store the application code for executing the solution of the present application, and the execution is controlled by the processor 1002. The processor 1002 is used to execute the application code stored in the memory 1001 to implement the contents shown in the above method embodiment.

[0233] The electronic devices include, but are not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), and fixed terminals such as digital TVs, desktop computers, etc. It can also be a server, etc. Fig.10 The electronic device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0234] The electronic device of this embodiment can be used to execute the method of any of the above embodiments, and its implementation principle and technical effect are similar, which will not be described in detail here.

[0235] The present application also provides a non-transitory computer-readable storage medium having computer-readable instructions stored thereon. When the aforementioned instructions are executed by a processor, the processor executes the method in the above embodiment.

[0236] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a non-transient computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0237] The embodiments of the present application are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and its core idea of ​​the present application. At the same time, changes or deformations made by those skilled in the art based on the ideas of the present application, the specific implementation methods and the scope of application of the present application, all belong to the scope of protection of the present application. In summary, the content of this specification should not be construed as a limitation on the present application.

Claims

1. A coordinated control method for off-grid renewable energy hydrogen production, characterized in that: include: When the measured current frequency of the system is within the preset regulation dead zone, a first coordinated control is performed on the off-grid renewable energy hydrogen production based on the preset steady-state control mode; When the current frequency of the system is not within the regulation dead zone, performing a second coordinated control on the off-grid renewable energy hydrogen production based on a preset transient control mode; After the second coordinated control, when the current frequency of the system is still not within the adjustment dead zone, performing a third coordinated control on the off-grid renewable energy hydrogen production based on a preset emergency control mode; After the third coordinated control, when the current frequency of the system is still not within the regulation dead zone, the power value to be cut off of the off-grid renewable energy hydrogen production is determined according to a preset overcut principle.

2. The method according to claim 1, characterized in that The first coordinated control of off-grid renewable energy hydrogen production based on a preset steady-state control mode includes: Obtain the current power generation power of new energy, the maximum charging power limit of energy storage, the current power of energy storage, the current power of hydrogen production load, the current predicted maximum power value of new energy and the maximum working power value of hydrogen production load; Determine the maximum power value of the new energy according to the steady-state control mode, the current power generation of the new energy, the maximum charging power limit of the energy storage and the current power of the energy storage; Determining a hydrogen production load power value according to the current power of the hydrogen production load and the current power of the energy storage; Determining a new energy power command value according to the new energy maximum power value and the current predicted maximum power value of the new energy; Determining a hydrogen production load power instruction value according to the hydrogen production load power value and the hydrogen production load maximum operating power value; The first coordinated control is performed based on the new energy power command value and the hydrogen production load power command value.

3. The method according to claim 1, characterized in that The second coordinated control of the off-grid renewable energy hydrogen production based on the preset transient control mode includes: According to the transient control mode, comparing a preset system rated frequency with the current frequency of the system; According to the comparison result, the corresponding hydrogen production power supply power response determination mode is obtained; The second coordinated control is performed according to the hydrogen production power supply power response determination mode.

4. The method according to claim 3, characterized in that The comparison result includes a result that the current frequency of the system is greater than the rated frequency of the system, a result that the current frequency of the system is less than the rated frequency of the system, and a result that the current frequency of the system is equal to the rated frequency of the system; The step of determining a mode according to the power response of the hydrogen production power supply and performing the second coordinated control includes: Obtain the initial power of the hydrogen production power supply, the rated power of the hydrogen production power supply, the lower limit of the frequency regulation dead zone, the upper limit of the frequency regulation dead zone and the system adjustment rate; According to the hydrogen production power supply power response determination mode, when the current frequency of the system is greater than the rated frequency of the system, the power response value of the hydrogen production power supply is determined according to the initial power of the hydrogen production power supply, the rated power of the hydrogen production power supply, the lower limit of the frequency adjustment dead zone and the system adjustment rate, so as to perform the second coordinated control based on the power response value of the hydrogen production power supply; According to the hydrogen production power supply power response determination mode, when the current frequency of the system is less than the rated frequency of the system, the power response value of the hydrogen production power supply is determined according to the initial power of the hydrogen production power supply, the rated power of the hydrogen production power supply, the upper limit of the frequency adjustment dead zone and the system adjustment rate, so as to perform the second coordinated control based on the power response value of the hydrogen production power supply; When the current frequency of the system is equal to the rated frequency of the system, the second coordinated control is not performed.

5. The method according to claim 2, characterized in that: The third coordinated control of the off-grid renewable energy hydrogen production based on the preset emergency control mode includes: Determining a power adjustment margin according to the emergency control mode and the corresponding overshoot parameter; Determining a power regulation command value according to the power regulation margin and the emergency control mode; The third coordinated control is performed according to the power adjustment command value.

6. The method according to claim 5, characterized in that After the third coordinated control, when the current frequency of the system is still not within the adjustment dead zone, according to a preset overcut principle, determining the to-be-cut power value of the off-grid new energy hydrogen production, including: Determining whether the power adjustment margin matches a preset power margin condition; In the case of matching, at the preset adjustment waiting end time, judging whether the current frequency of the system is within the adjustment dead zone range to determine whether to re-perform the third coordinated control; In the case of mismatch, the power value to be cut off is determined based on the real-time calculated energy storage overload, the power adjustment margin, the acquired energy storage rated power and the preset overcut coefficient.

7. The method according to claim 6, characterized in that The power adjustment margin includes a power increase margin and a power decrease margin; Wherein, determining the power value to be cut off according to the real-time calculated energy storage overload, the power adjustment margin, the acquired energy storage rated power and the preset overcut coefficient includes: When the energy storage overload is equal to 0, determining the power value to be removed to be 0; When the energy storage overload is greater than 0, the load power to be cut is determined according to the energy storage overload, the power increase margin, the energy storage rated power and the overcut coefficient; When the energy storage overload is less than 0, the new energy power to be cut off is determined according to the energy storage overload, the power reduction margin, the energy storage rated power and the overcut coefficient; The load power that needs to be cut off and the new energy power that needs to be cut off are determined as the power value to be cut off.

8. A coordinated control device for off-grid renewable energy hydrogen production, characterized in that: include: A first coordination control module is used to perform a first coordination control on off-grid renewable energy hydrogen production based on a preset steady-state control mode when the measured current frequency of the system is within a preset regulation dead zone; A second coordination control module is used to perform a second coordination control on the off-grid renewable energy hydrogen production based on a preset transient control mode when the current frequency of the system is not within the regulation dead zone; A third coordinated control module is used to perform a third coordinated control on the off-grid renewable energy hydrogen production based on a preset emergency control mode when the current frequency of the system is still not within the adjustment dead zone after the second coordinated control; A cutting module is used to determine the power value to be cut off of the off-grid renewable energy hydrogen production according to a preset over-cutting principle when the current frequency of the system is still not within the adjustment dead zone after the third coordinated control.

9. An electronic device, characterized in that: include: processor; A memory storing a computer program, which, when executed by the processor, enables the processor to execute the coordinated control method for off-grid renewable energy hydrogen production as described in any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium, characterized in that: Computer-readable instructions are stored thereon, and when the instructions are executed by a processor, the processor executes the coordinated control method for off-grid renewable energy hydrogen production as described in any one of claims 1-7.

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