Off-grid hydrogen production system

Abstract

This application provides a wind power off-grid hydrogen production system, comprising: a hydrogen production module, a voltage regulator module, and at least one power supply system connected in parallel. Each power supply system includes: a wind power module and a power regulation module. The output terminal of the wind power module is connected to the input terminal of the power regulation module, and the output terminal of the power regulation module is connected to the hydrogen production module through the voltage regulator module. The control terminal of the power regulation module is used to receive a power control signal. The power regulation module is used to adjust the output power of the power regulation module and the angular velocity of the wind power module under the action of the power control signal, so that the output power of the power regulation module is equal to a preset reference power. This application enables multiple wind power modules to be connected in parallel and stably supply power to the hydrogen production module without grid or battery involvement, allowing the hydrogen production module to produce hydrogen efficiently.

Description

Technical Field

[0001] This application relates to the field of wind power hydrogen production technology, and more specifically, to a wind power off-grid hydrogen production system. Background Technology

[0002] With the development of the renewable energy industry and the increasing demand for hydrogen energy applications, wind power-to-hydrogen has become an important technological path for achieving efficient wind energy conversion and clean energy storage. Therefore, how to solve the stability problem of coordinated power supply from multiple wind turbines in a wind power-to-hydrogen system to ensure continuous and efficient hydrogen production from the electrolyzer has become an urgent technical issue to be addressed.

[0003] Currently, there are two main ways for multiple wind turbines to work together to supply power in wind-powered hydrogen production systems: one is grid-connected operation mode, which uses the power grid as an energy buffer to suppress intermittent power fluctuations of wind power; the other is off-grid operation mode, which stores excess wind power through energy storage devices such as batteries and supercapacitors, and releases the energy when wind power is insufficient to maintain stable power supply to the electrolyzer.

[0004] However, grid-connected mode is limited by the grid coverage area and cannot meet the application needs of remote areas; off-grid mode relies on energy storage devices that are costly, complex to maintain, and have limited cycle life, resulting in poor long-term operating economy. Utility Model Content

[0005] The purpose of this application is to provide a wind power off-grid hydrogen production system to address the shortcomings of the prior art, thereby solving the problems of insufficient grid coverage and high cost of energy storage devices in the prior art.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: In a first aspect, this application provides a wind power off-grid hydrogen production system, which includes: a hydrogen production module, a voltage regulator module, and at least one power supply system connected in parallel; each of the power supply systems is used to supply power to the hydrogen production module; Each of the aforementioned power supply systems includes: a wind power module and a power regulation module; The output terminal of the wind power module is connected to the input terminal of the power regulation module, and the output terminal of the power regulation module is connected to the hydrogen production module through the voltage regulator module. The control terminal of the power regulation module is used to receive a power control signal. The power regulation module is used to adjust the output power of the power regulation module and the angular velocity of the wind power module under the action of the power control signal, so that the output power of the power regulation module is equal to the preset reference power.

[0007] Optionally, each wind power module includes: a wind turbine unit and a power generation unit; The first end of the wind turbine unit is connected to the first end of the power generation unit, and the second end of the power generation unit is connected to the first end of the power regulation module. The wind turbine unit is used to convert wind energy into mechanical energy, and the power generation unit is used to convert mechanical energy into alternating current.

[0008] Optionally, each wind power module further includes: a pitch angle control module; The input terminal of the pitch angle control module is connected to the angular velocity acquisition terminal of the wind turbine unit, and the output terminal of the pitch angle control module is connected to the pitch angle control terminal of the wind turbine unit. The pitch angle control module is used to output a pitch angle control signal to the wind turbine unit based on the angular velocity of the wind turbine unit, the preset control speed, and the preset pitch angle threshold, so that the wind turbine unit adjusts the pitch angle under the action of the pitch angle control signal.

[0009] Optionally, each of the power supply systems further includes: a power control module; The first input terminal of the power control module is connected to the angular velocity acquisition terminal of the wind turbine unit, the second input terminal of the power control module is connected to the first terminal of the wind power module, and the output terminal of the power control module is connected to the control terminal of the power regulation module. The power control module is used to output a power control signal to the power adjustment module based on the angular velocity of the wind turbine unit and the actual output power of the wind power module, so that the power adjustment module adjusts the output power and the angular velocity of the wind power module under the action of the power control signal.

[0010] Optionally, the power control module includes: a maximum power point tracking unit, a power deviation comparison unit, a correction unit, and a control signal generation unit; The first end of the maximum power tracking unit is connected to the angular velocity acquisition end of the wind turbine unit, and the second end of the maximum power tracking unit is connected to the first end of the power deviation comparison unit. The second end of the power deviation comparison unit is connected to the first end of the wind power module, and the third end of the power deviation comparison unit is connected to the first end of the correction unit. The second end of the correction unit is connected to the first end of the control signal generation unit, the second end of the control signal generation unit is connected to a reference carrier signal, and the third end of the control signal generation unit is connected to the control end of the power control module.

[0011] Optionally, the system further includes: a power control module; Each first input terminal of the power control module is connected to the angular velocity acquisition terminal of the wind turbine unit in each wind power module, each second input terminal of the power control module is connected to the first terminal of each wind power module, and the output terminal of the power control module is connected to the control terminal of each power control module. The power control module is used to output power control signals to each power adjustment module according to the angular velocity of each wind turbine unit and the actual output power of the wind power module, so that each power adjustment module adjusts the output power and the angular velocity of the wind power module under the action of the power control signal.

[0012] Optionally, the power regulation module includes: an AC-DC conversion unit and a power regulation unit; The first, second, and third ends of the AC-DC conversion unit are respectively connected to the first phase, second phase, and third phase of the first end of the wind power module. The fourth terminal of the AC-DC conversion unit is connected to the first input terminal of the power regulation unit, and the fifth terminal of the AC-DC conversion unit is connected to the second input terminal of the power regulation unit. The first output terminal and the second output terminal of the power regulation unit are respectively connected to the first input terminal and the second input terminal of the hydrogen production module; The control terminal of the power regulation unit is used to receive power control signals.

[0013] Optionally, the AC-DC conversion unit includes: a three-phase full-bridge subunit and a filter subunit; The first, second, and third input terminals of the three-phase full-bridge subunit are respectively connected to the first, second, and third phases of the first terminal of the wind power module. The first output terminal of the three-phase full-bridge subunit is connected to the first terminal of the filter subunit and the first input terminal of the power regulation unit. The second output terminal of the three-phase full-bridge subunit is connected to the second terminal of the filter subunit and the second input terminal of the power regulation unit.

[0014] Optionally, the three-phase full-bridge subunit includes: a first diode, a second diode, a third diode, a fourth diode, a fifth diode, and a sixth diode; The anode of the first diode is connected to the cathode of the second diode and the first phase of the first terminal of the wind power module, the anode of the third diode is connected to the cathode of the fourth diode and the second phase of the first terminal of the wind power module, and the anode of the fifth diode is connected to the cathode of the sixth diode and the third phase of the first terminal of the wind power module. The cathodes of the first diode, the third diode, and the fifth diode are respectively connected to the first terminal of the filter subunit and the first terminal of the power adjustment unit. The anodes of the second diode, the fourth diode, and the sixth diode are respectively connected to the second terminal of the filter subunit and the second terminal of the power adjustment unit.

[0015] Optionally, the power regulation unit includes: a first inductor, a first transistor, and a seventh diode; The first end of the first inductor is connected to the third end of the AC-DC conversion unit, the second end of the first inductor is connected to the collector of the first transistor and the anode of the seventh diode, the emitter of the first transistor is connected to the fourth end of the AC-DC conversion unit and the second input end of the hydrogen production module, and the gate of the first transistor is used to receive the power control signal. The negative terminal of the seventh diode is connected to the first input terminal of the hydrogen production module.

[0016] The beneficial effects of this application are as follows: The off-grid wind power hydrogen production system includes a hydrogen production module, a voltage regulator module, and at least one power supply system connected in parallel. Each power supply system is used to supply power to the hydrogen production module. Each power supply system includes a wind power module and a power regulation module. The output terminal of the wind power module is connected to the input terminal of the power regulation module, and the output terminal of the power regulation module is connected to the hydrogen production module through the voltage regulator module. The control terminal of the power regulation module is used to receive a power control signal. Under the action of the power control signal, the power regulation module adjusts the output power of the power regulation module and the angular velocity of the wind power module so that the output power of the power regulation module is equal to the preset reference power. In this embodiment, the power regulation module receives the power control signal through its control terminal to adjust the output power and the angular velocity of the wind power module, so that the output power approaches the preset reference power, thereby maximizing the utilization of wind energy and avoiding the instability between branches caused by parallel connection. This enables multiple wind power modules to be connected in parallel and supply stable power to the hydrogen production module without the participation of the grid and batteries, allowing the hydrogen production module to produce hydrogen efficiently. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a wind power off-grid hydrogen production system provided in an embodiment of this application; Figure 2 This is a schematic diagram of the output characteristics of a wind power module provided in an embodiment of this application; Figure 3 This is a schematic diagram of another wind power off-grid hydrogen production system provided in the embodiments of this application; Figure 4 This is a schematic diagram of the structure of a power control module provided in an embodiment of this application; Figure 5 This is a schematic diagram of another power control module provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of an AC-DC conversion unit provided in an embodiment of this application; Figure 7 This is a schematic diagram of the first simulation result provided in the embodiments of this application; Figure 8 This is a schematic diagram of the second simulation result provided in the embodiments of this application; Figure 9 This is a schematic diagram of the third simulation result provided in the embodiments of this application; Figure 10 This is a schematic diagram of the fourth simulation result provided in the embodiments of this application; Figure 11 This is a schematic diagram of the fifth simulation result provided in the embodiments of this application; Figure 12 This is a schematic diagram of the sixth simulation result provided in the embodiments of this application. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the accompanying drawings in this application are for illustrative and descriptive purposes only and are not intended to limit the scope of protection of this application. Furthermore, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented according to some embodiments of this application. It should be understood that the operations in the flowcharts may not be implemented in sequence, and steps without logical contextual relationships may be reversed or implemented simultaneously. In addition, those skilled in the art, guided by the content of this application, may add one or more other operations to the flowcharts, or remove one or more operations from the flowcharts.

[0020] Furthermore, the described embodiments are merely some, not all, of the embodiments of this application. The components of the embodiments of this application described and illustrated herein can typically be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0021] It should be noted that the term "comprising" will be used in the embodiments of this application to indicate the presence of the features declared thereafter, but does not exclude the addition of other features.

[0022] In the current wind power hydrogen production system, there are two power supply modes for multiple wind turbines to work together: grid-connected operation mode is limited by the grid coverage and cannot meet the application needs of remote areas, while off-grid operation mode relies on energy storage devices that are costly, complex to maintain, and have limited cycle life, resulting in poor long-term operating economy.

[0023] Based on this, this application proposes a wind power off-grid hydrogen production system. The system includes a hydrogen production module, a voltage stabilization module, and at least one power supply system connected in parallel. Each power supply system includes a wind power module and a power regulation module. Under the action of a power control signal, the power regulation module adjusts its output power and the angular velocity of the wind power module so that the power output of the power regulation module is equal to a preset reference power. Thus, without the participation of the grid and batteries, multiple wind turbines can be connected in parallel to stably supply power to the hydrogen production module, enabling the hydrogen production module to produce hydrogen efficiently.

[0024] Next, refer to Figure 1 The specific structure of a wind power off-grid hydrogen production system is described. Among other things, Figure 1 This is a schematic diagram of a wind power off-grid hydrogen production system provided in an embodiment of this application.

[0025] The wind power off-grid hydrogen production system includes: a hydrogen production module 3, a voltage regulator module 2, and at least one power supply system 1 connected in parallel. Each power supply system 1 is used to supply power to the hydrogen production module 3.

[0026] Each power supply system 1 includes: a wind power module 11 and a power regulation module 12.

[0027] The wind power module 11 is the energy source for the entire system, converting wind energy into electrical energy in the form of alternating current (AC). The power regulation module 12 receives the AC power from the wind power module 11, converts it into direct current (DC), and can adjust the received power based on the wind turbine's maximum power point tracking (MPPT) characteristics to ensure a stable power supply to the hydrogen production module 3. The hydrogen production module 3 is used to convert electrical energy into hydrogen energy.

[0028] The output terminal of the wind power module 11 is connected to the input terminal of the power regulation module 12, and the output terminal of the power regulation module 12 is connected to the hydrogen production module 3 through the voltage regulator module 2.

[0029] Specifically, the first output terminal of the power regulation module 12 is connected to the first terminal of the voltage regulator module 2 and the first input terminal of the hydrogen production module 3, respectively, and the second output terminal of the power regulation module 12 is connected to the second terminal of the voltage regulator module 2 and the second input terminal of the hydrogen production module 3, respectively.

[0030] Among them, the voltage regulator module 2 can be a second capacitor, which can offset the power fluctuations caused by the differences in wind speed and the operating conditions of the wind power module 11 in different power supply systems 1, stabilize the voltage of the bus, and prevent the hydrogen production module 3 from being affected by sudden changes in input voltage, thus affecting the operating efficiency or equipment safety.

[0031] The control terminal of the power regulation module 12 is used to receive a power control signal. The power regulation module 12 is used to adjust the output power of the power regulation module 12 and the angular velocity of the wind power module 11 under the action of the power control signal, so that the output power of the power regulation module 12 is equal to the preset reference power.

[0032] Specifically, the power control signal can be generated by the power control module 13 based on the current angular velocity of the wind power module 11 and the actual output power of the wind power module 11. The power regulation module 12 adjusts the on / off duty cycle of the internal switching components according to the power control signal, thereby changing the output power and in turn regulating the angular velocity of the wind power module 11. Specifically, by adjusting the on / off duty cycle of the internal switching components, the input current of the power regulation module 12 is changed, which in turn changes the electromagnetic torque of the wind power module 11, breaking its balance with the mechanical torque of the wind energy. The torque imbalance will cause the angular velocity of the wind power module 11 to rise or fall until it matches the optimal value.

[0033] The optimal value of the angular velocity is matched with the preset reference power. The preset reference power can be obtained through Maximum Power Point Tracking (MPPT). Specifically, in the off-grid hydrogen production system, the output power of the wind power module 11 varies with wind speed and angular velocity. There is a unique optimal operating point at different wind speeds, corresponding to a specific angular velocity, at which the wind energy conversion efficiency is the highest. The role of MPPT is to calculate this optimal operating point in real time, and then adjust the angular velocity of the wind power module 11 in reverse through closed-loop control, so that it always operates at the optimal operating point, ensuring that the wind turbine continuously outputs maximum power and provides sufficient electrical energy for the efficient hydrogen production of the hydrogen production module 3.

[0034] Figure 2 This is a schematic diagram of the output characteristics of a wind power module 11 provided in an embodiment of this application. For example... Figure 2 As shown, the angular velocity of the wind power module 11 is different under different wind speeds, and its output power is different. The dashed line in the figure shows the correspondence between the angular velocity of the wind power module 11 and the maximum output power under different wind speeds.

[0035] For example, the maximum output power of the MPPT-based wind power module 11 can be expressed by the following formula (1): (1) in, This is the maximum output power of wind power module 11. It is the preset maximum wind energy utilization coefficient. It is the pre-obtained air density. It is the angular velocity of wind turbine module 11. The rotor radius of wind power module 11 This is the preset optimal tip speed ratio. Using the above formula (1), the preset reference power of the wind power module 11 at the current wind speed can be calculated based on the current angular velocity of the wind power module 11. It should be noted that the ratio of angular velocity to the current wind speed is a constant value; therefore, the preset reference power can be determined based on the current angular velocity.

[0036] In this embodiment, the off-grid wind power hydrogen production system includes a hydrogen production module, a voltage regulator module, and at least one power supply system connected in parallel. Each power supply system supplies power to the hydrogen production module. Each power supply system includes a wind power module and a power regulation module. The output terminal of the wind power module is connected to the input terminal of the power regulation module, and the output terminal of the power regulation module is connected to the hydrogen production module through the voltage regulator module. The control terminal of the power regulation module is used to receive a power control signal. Under the action of the power control signal, the power regulation module adjusts the output power of the power regulation module and the angular velocity of the wind power module so that the output power of the power regulation module is equal to a preset reference power. In this embodiment, the power regulation module receives a power control signal through its control terminal to adjust the output power and the angular velocity of the wind power module, so that the output power approaches the preset reference power, thereby maximizing the utilization of wind energy and avoiding the instability between branches caused by parallel connection. This enables multiple wind power modules to be connected in parallel and supply stable power to the hydrogen production module without the participation of the grid or batteries, allowing the hydrogen production module to produce hydrogen efficiently.

[0037] Figure 3 This is a schematic diagram of another off-grid hydrogen production system based on wind power provided in this application. Next, refer to... Figure 3 The off-grid hydrogen production system using wind turbines will be further described.

[0038] Each wind power module 11 includes: a wind turbine unit 111 and a power generation unit 112.

[0039] The first end of the wind turbine unit 111 is connected to the first end of the power generation unit 112, and the second end of the power generation unit 112 is connected to the first end of the power regulation module 12.

[0040] The wind turbine unit 111 is used to convert wind energy into mechanical energy, and the power generation unit 112 is used to convert mechanical energy into alternating current.

[0041] Specifically, the wind turbine unit 111 may include an impeller and a main shaft. The impeller is in direct contact with the air, and the main shaft connects the impeller to the power generation unit 112, transferring the rotational mechanical energy of the impeller to the rotor of the power generation unit 112.

[0042] When the impeller of the wind turbine unit 111 is driven to rotate by the wind, the main shaft will synchronously drive the rotor of the power generation unit 112 to rotate, directly converting the rotational mechanical energy of the impeller into the rotational mechanical energy of the rotor, providing a power basis for the electromagnetic induction power generation of the power generation unit 112.

[0043] The power generation unit 112 includes a rotor, a stator, and sensors. The rotor is rigidly connected to the main shaft of the wind turbine unit 111, and contains a permanent magnet, allowing it to rotate synchronously with the main shaft and generate a rotating magnetic field. The stator can be fixed inside the generator housing and is used to generate an induced electromotive force. The sensors detect the rotor's angular velocity and send it to the power control module 13. The power generation unit 112 converts mechanical energy into alternating current using the law of electromagnetic induction.

[0044] In this embodiment, the wind turbine unit and the power generation unit provide power to the off-grid hydrogen production system.

[0045] Further as Figure 3 As shown, each wind power module 11 also includes a pitch angle control module 113.

[0046] The input terminal of the pitch angle control module 113 is connected to the angular velocity acquisition terminal of the wind turbine unit 111, and the output terminal of the pitch angle control module 113 is connected to the pitch angle control terminal of the wind turbine unit 111.

[0047] The angular velocity acquisition end can be the sensor output end of the wind turbine unit 111.

[0048] The pitch angle control module 113 is used to output a pitch angle control signal to the wind turbine unit 111 based on the angular velocity of the wind turbine unit 111, the preset control speed, and the preset pitch angle threshold, so that the wind turbine unit 111 adjusts the pitch angle under the action of the pitch angle control signal.

[0049] Specifically, the pitch angle control module 113 stabilizes the wind turbine angular velocity by adjusting the angle between the wind turbine blades and the wind in the wind turbine unit 111, so that the wind turbine angular velocity is stabilized within a safe and preset reasonable range, protecting the equipment and working with MPPT to achieve efficient power supply.

[0050] Optionally, the pitch angle control module 113 includes: a speed deviation calculation unit, a proportional-integral control unit, an inertia adjustment unit, and a limiting unit.

[0051] The first end of the speed deviation calculation unit is connected to the angular velocity acquisition end of the wind turbine unit 111, and the second end of the speed deviation calculation unit is connected to the first end of the proportional-integral control unit.

[0052] The second end of the proportional-integral control unit is connected to the first end of the inertial adjustment unit, the second end of the inertial adjustment unit is connected to the first end of the limiting unit, and the second end of the limiting unit is connected to the pitch angle control end of the wind turbine unit 111.

[0053] The speed deviation calculation unit is used to determine the deviation value based on the angular velocity and the reference angular velocity and send it to the proportional-integral control unit. The proportional-integral control unit is used to perform proportional-integral adjustment on the deviation value, output an initial control signal, and send the initial control signal to the inertial adjustment unit. The inertial adjustment unit is used to filter the initial control signal to obtain an intermediate control signal and send the intermediate control signal to the limiting unit. The limiting unit is used to adjust the speed and pitch angle amplitude of the intermediate control signal to obtain a control signal and send the control signal to the wind turbine unit 111.

[0054] For example, the limiting unit can limit the adjustment speed to 10 degrees per second and the pitch angle amplitude to 90 degrees for stable adjustment.

[0055] In this embodiment, the pitch angle control module can stabilize the wind turbine angular velocity and avoid overload.

[0056] Next, we will introduce the structures of two power control modules 13.

[0057] As a first alternative implementation, Figure 4 This is a schematic diagram of the structure of a power control module provided in an embodiment of this application. Figure 4 As shown, each power supply system 1 also includes a power control module 13.

[0058] The first input terminal of the power control module 13 is connected to the angular velocity acquisition terminal of the wind turbine unit 111, the second input terminal of the power control module 13 is connected to the first terminal of the wind power module 11, and the output terminal of the power control module 13 is connected to the control terminal of the power regulation module 12.

[0059] The power control module 13 is used to output a power control signal to the power adjustment module 12 according to the angular velocity of the wind turbine unit 111 and the actual output power of the wind power module 11, so that the power adjustment module 12 adjusts the output power and the angular velocity of the wind power module 11 under the action of the power control signal.

[0060] Specifically, the power control module 13 determines the preset reference power based on the angular velocity of the wind turbine unit 111, and then generates a power control signal based on the comparison between the preset reference power and the actual output power.

[0061] Optionally, if the actual output power is lower than the preset reference power, a power control signal is generated to increase the duty cycle of the switching component in the power regulation module 12; if the actual output power is higher than the preset reference power, a power control signal is generated to decrease the duty cycle of the switching component in the power regulation module 12.

[0062] Optionally, the power control module 13 includes: a maximum power tracking unit, a power deviation comparison unit, a correction unit, and a control signal generation unit.

[0063] The first end of the maximum power tracking unit is connected to the angular velocity acquisition end of the wind turbine unit 111, and the second end of the maximum power tracking unit is connected to the first end of the power deviation comparison unit.

[0064] The second end of the power deviation comparison unit is connected to the first end of the wind power module 11, and the third end of the power deviation comparison unit is connected to the first end of the correction unit.

[0065] The second end of the correction unit is connected to the first end of the control signal generation unit. The second end of the control signal generation unit is connected to the reference carrier signal. The third end of the control signal generation unit is connected to the control end of the power control module 13.

[0066] Specifically, the maximum power point tracking (MPPT) unit receives the angular velocity of the wind power module 11 and outputs an optimal reference power signal to the power deviation comparison unit according to the MPPT algorithm. The power deviation comparison unit receives the optimal reference power signal and the actual output power of the wind power module 11, calculates the deviation, and outputs a deviation signal to the correction unit. The correction unit corrects the deviation signal and outputs a correction signal to the control signal generation unit. The control signal generation unit standardizes the correction signal based on the correction signal and the reference carrier signal, and outputs a power control signal that the power regulation module 12 can recognize.

[0067] In this embodiment, the output power is ensured to approach the preset reference power by means of a maximum power tracking unit, a power deviation comparison unit, a correction unit, and a control signal generation unit, and system fluctuations are avoided, making the power regulation more stable and accurate.

[0068] As a second alternative implementation, Figure 5 This is a schematic diagram of another power control module provided in an embodiment of this application. For example... Figure 5 As shown, the wind power off-grid hydrogen production system also includes: power control module 13.

[0069] Each first input terminal of the power control module 13 is connected to the angular velocity acquisition terminal of the wind turbine unit 111 in each wind power module 11, each second input terminal of the power control module 13 is connected to the first terminal of each wind power module 11, and the output terminal of the power control module 13 is connected to the control terminal of each power control module 13.

[0070] The power control module 13 is used to output power control signals to each power adjustment module 12 according to the angular velocity of each wind turbine unit 111 and the actual output power of the wind power module 11, so that each power adjustment module 12 adjusts the output power and the angular velocity of the wind power module 11 under the action of the power control signal.

[0071] In this embodiment, the power control module is used to collect the angular velocity and output power of each power supply system and output the corresponding power control signal for each power supply system to control each power supply system separately, thereby decoupling the control of each branch in an integrated manner.

[0072] Continue to refer to Figure 3 The power regulation module 12 includes: an AC-DC conversion unit 121 and a power regulation unit 122.

[0073] The first, second, and third terminals of the AC-DC conversion unit 121 are respectively connected to the first phase, second phase, and third phase of the first terminal of the wind power module 11.

[0074] The fourth terminal of the AC-DC conversion unit 121 is connected to the first terminal of the power regulation unit 122, and the fifth terminal of the AC-DC conversion unit 121 is connected to the second terminal of the power regulation unit 122.

[0075] The first output terminal and the second output terminal of the power regulation unit 122 are respectively connected to the first input terminal and the second input terminal of the hydrogen production module 3.

[0076] The control terminal of the power regulation unit 122 is used to receive power control signals.

[0077] Specifically, the AC-DC conversion unit 121 is used to rectify the AC power output from the wind power module 11 into DC power. The power regulation unit 122 controls the duty cycle of the switching components based on the power control signal input from the control terminal. On the one hand, it regulates the rectified DC power to output power close to the preset reference power. On the other hand, it reverses the angular velocity of the wind power module 11 to ensure that the wind power module 11 operates at the optimal operating point under the current wind speed, thereby maximizing the utilization of wind energy.

[0078] Figure 6 This is a schematic diagram of the structure of an AC-DC conversion unit provided in an embodiment of this application. Figure 6 As shown, the AC-DC conversion unit 121 includes a three-phase full-bridge subunit 1211 and a filter subunit 1212.

[0079] The first, second, and third input terminals of the three-phase full-bridge subunit 1211 are respectively connected to the first phase, second phase, and third phase of the first terminal of the wind power module 11. The first output terminal of the three-phase full-bridge subunit 1211 is connected to the first terminal of the filter subunit 1212 and the first input terminal of the power regulation unit 122. The second output terminal of the three-phase full-bridge subunit 1211 is connected to the second terminal of the filter subunit 1212 and the second input terminal of the power regulation unit 122.

[0080] Specifically, the three-phase full-bridge subunit 1211 is connected to the three-phase AC power output from the wind power module 11. Through the internal power switching transistors or diodes forming a full-bridge rectifier topology, the three-phase AC power output from the wind power module 11 is converted into unidirectional pulsating DC power.

[0081] The filter subunit 1212 is used to filter out the ripple in the DC output of the three-phase full-bridge subunit 1211, correcting the pulsating DC to a stable and continuous DC, preventing the ripple from affecting the duty cycle control accuracy of the power regulation unit 122, and protecting subsequent power devices. The filter subunit 1212 can be the first capacitor C1.

[0082] Furthermore, continue to refer to Figure 6 The three-phase full-bridge subunit 1211 includes: a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, and a sixth diode D6.

[0083] The positive terminal of the first diode D1 is connected to the negative terminal of the second diode D2 and the first phase of the first terminal of the wind power module 11, respectively. The positive terminal of the third diode D3 is connected to the negative terminal of the fourth diode D4 and the second phase of the first terminal of the wind power module 11, respectively. The positive terminal of the fifth diode D5 is connected to the negative terminal of the sixth diode D6 and the third phase of the first terminal of the wind power module 11, respectively.

[0084] The cathodes of the first diode D1, the third diode D3, and the fifth diode D5 are connected to the first terminal of the filter subunit 1212 and the first terminal of the power adjustment unit 122, respectively. The anodes of the second diode D2, the fourth diode D4, and the sixth diode D6 are connected to the second terminal of the filter subunit 1212 and the second terminal of the power adjustment unit 122, respectively.

[0085] Specifically, diodes D1, D3, and D5 are all upper bridge arm diodes, while diodes D2, D4, and D6 are all lower bridge arm diodes. The cathodes of all upper bridge arm diodes serve as the positive DC output terminal after rectification, and the cathodes of all lower bridge arm diodes serve as the negative DC output terminal after rectification.

[0086] Rectification is achieved through individual diodes, eliminating the need for additional control signals. Rectification is automatically completed solely by the characteristics of the diodes, resulting in a simple structure and high reliability.

[0087] Continue to refer to Figure 6 The power regulation unit 122 includes: a first inductor L1, a first transistor S1, and a seventh diode D7.

[0088] The first end of the first inductor L1 is connected to the third end of the AC-DC conversion unit 121. The second end of the first inductor L1 is connected to the collector of the first transistor S1 and the positive terminal of the seventh diode D7. The emitter of the first transistor S1 is connected to the fourth end of the AC-DC conversion unit 121 and the second input terminal of the hydrogen production module 3. The gate of the first transistor S1 is used to receive the power control signal.

[0089] The negative terminal of the seventh diode D7 is connected to the first input terminal of the hydrogen production module 3.

[0090] The power control signal controls the on / off time of the first transistor S1, thereby driving the first inductor L1 to charge and discharge energy, ultimately achieving voltage boost and buck conversion. Specifically, increasing the duty cycle allows the first inductor L1 to store more energy, increasing the output power, while decreasing the duty cycle reduces the output power.

[0091] The seventh diode D7 is used to prevent the reverse flow of electrical energy from the hydrogen production module 3.

[0092] Next, the simulation results of the off-grid hydrogen production system proposed in this application will be introduced. Table 1 shows the simulation parameters. The simulation is illustrated using the example of wind turbine unit 111 as a wind turbine, power generation unit 112 as a permanent magnet synchronous generator, and hydrogen production module 3 as an electrolyzer.

[0093] Table 1 Simulation Parameter Table

[0094] Figure 7 This is a schematic diagram of the first simulation result provided in the embodiments of this application. Figure 7 The curves showing the change of wind speed over time are shown for five different wind speeds.

[0095] Figure 8 This is a schematic diagram of the second simulation result provided in the embodiments of this application. Figure 8 The diagram shows the angular velocity of the wind turbine module after adjustment by the power regulation module. Figure 8 It can be seen that the angular velocity changes with the wind speed.

[0096] Figure 9 This is a schematic diagram of the third simulation result provided in the embodiments of this application. Figure 9 This shows the output power of the wind power module after adjustment by the power regulation module. Figure 9 It can be seen that the output power varies with wind speed.

[0097] Figure 10 This is a schematic diagram of the fourth simulation result provided in the embodiments of this application. Figure 10 The diagram shows a schematic of the duty cycle of the power control signal, from... Figure 10 It can be seen that the duty cycle changes with wind speed.

[0098] Depend on Figures 7 to 10 It is evident that the power regulation module is effective. The duty cycle of the power regulation signal varies with different wind speeds, and the angular velocity of the wind turbine module matches this duty cycle, thus outputting a matched power. Furthermore, both pitch angle control and power control are effective regardless of wind speed.

[0099] Figure 11 This is a schematic diagram of the fifth simulation result provided in the embodiments of this application. Figure 11 The load power curve of the hydrogen production module is shown, and the load power also varies with the output power of the wind power module.

[0100] Figure 12 This is a schematic diagram of the sixth simulation result provided in the embodiments of this application. Figure 12 The hydrogen production curve of the hydrogen production module is shown. Figure 12 It is evident that, based on the power control of the off-grid wind power hydrogen production system, the hydrogen production capacity of the hydrogen production module has steadily increased.

[0101] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A wind power off-grid hydrogen production system, characterized in that, The wind power off-grid hydrogen production system includes: a hydrogen production module, a voltage regulator module, and at least one power supply system connected in parallel; each of the power supply systems is used to supply power to the hydrogen production module. Each of the aforementioned power supply systems includes: a wind power module and a power regulation module; The output terminal of the wind power module is connected to the input terminal of the power regulation module, and the output terminal of the power regulation module is connected to the hydrogen production module through the voltage regulator module. The control terminal of the power regulation module is used to receive a power control signal. The power regulation module is used to adjust the output power of the power regulation module and the angular velocity of the wind power module under the action of the power control signal, so that the output power of the power regulation module is equal to the preset reference power.

2. The wind power off-grid hydrogen production system according to claim 1, characterized in that, Each wind power module includes: a wind turbine unit and a power generation unit; The first end of the wind turbine unit is connected to the first end of the power generation unit, and the second end of the power generation unit is connected to the first end of the power regulation module. The wind turbine unit is used to convert wind energy into mechanical energy, and the power generation unit is used to convert mechanical energy into alternating current.

3. The wind power off-grid hydrogen production system according to claim 2, characterized in that, Each wind power module also includes: a pitch angle control module; The input terminal of the pitch angle control module is connected to the angular velocity acquisition terminal of the wind turbine unit, and the output terminal of the pitch angle control module is connected to the pitch angle control terminal of the wind turbine unit. The pitch angle control module is used to output a pitch angle control signal to the wind turbine unit based on the angular velocity of the wind turbine unit, the preset control speed, and the preset pitch angle threshold, so that the wind turbine unit adjusts the pitch angle under the action of the pitch angle control signal.

4. The wind power off-grid hydrogen production system according to claim 2, characterized in that, Each of the aforementioned power supply systems also includes: a power control module; The first input terminal of the power control module is connected to the angular velocity acquisition terminal of the wind turbine unit, the second input terminal of the power control module is connected to the first terminal of the wind power module, and the output terminal of the power control module is connected to the control terminal of the power regulation module. The power control module is used to output a power control signal to the power adjustment module based on the angular velocity of the wind turbine unit and the actual output power of the wind power module, so that the power adjustment module adjusts the output power and the angular velocity of the wind power module under the action of the power control signal.

5. The wind power off-grid hydrogen production system according to claim 4, characterized in that, The power control module includes: a maximum power tracking unit, a power deviation comparison unit, a correction unit, and a control signal generation unit; The first end of the maximum power tracking unit is connected to the angular velocity acquisition end of the wind turbine unit, and the second end of the maximum power tracking unit is connected to the first end of the power deviation comparison unit. The second end of the power deviation comparison unit is connected to the first end of the wind power module, and the third end of the power deviation comparison unit is connected to the first end of the correction unit. The second end of the correction unit is connected to the first end of the control signal generation unit, the second end of the control signal generation unit is connected to a reference carrier signal, and the third end of the control signal generation unit is connected to the control end of the power control module.

6. The wind power off-grid hydrogen production system according to claim 2, characterized in that, The system also includes: a power control module; Each first input terminal of the power control module is connected to the angular velocity acquisition terminal of the wind turbine unit in each wind power module, each second input terminal of the power control module is connected to the first terminal of each wind power module, and the output terminal of the power control module is connected to the control terminal of each power control module. The power control module is used to output power control signals to each power adjustment module according to the angular velocity of each wind turbine unit and the actual output power of the wind power module, so that each power adjustment module adjusts the output power and the angular velocity of the wind power module under the action of the power control signal.

7. The wind power off-grid hydrogen production system according to claim 1, characterized in that, The power regulation module includes: an AC-DC conversion unit and a power regulation unit; The first, second, and third ends of the AC-DC conversion unit are respectively connected to the first phase, second phase, and third phase of the first end of the wind power module. The fourth terminal of the AC-DC conversion unit is connected to the first input terminal of the power regulation unit, and the fifth terminal of the AC-DC conversion unit is connected to the second input terminal of the power regulation unit. The first output terminal and the second output terminal of the power regulation unit are respectively connected to the first input terminal and the second input terminal of the hydrogen production module. The control terminal of the power regulation unit is used to receive power control signals.

8. The wind power off-grid hydrogen production system according to claim 7, characterized in that, The AC-DC conversion unit includes: a three-phase full-bridge subunit and a filter subunit; The first, second, and third input terminals of the three-phase full-bridge subunit are respectively connected to the first, second, and third phases of the first terminal of the wind power module. The first output terminal of the three-phase full-bridge subunit is connected to the first terminal of the filter subunit and the first input terminal of the power regulation unit. The second output terminal of the three-phase full-bridge subunit is connected to the second terminal of the filter subunit and the second input terminal of the power regulation unit.

9. The wind power off-grid hydrogen production system according to claim 8, characterized in that, The three-phase full-bridge subunit includes: a first diode, a second diode, a third diode, a fourth diode, a fifth diode, and a sixth diode; The anode of the first diode is connected to the cathode of the second diode and the first phase of the first terminal of the wind power module, the anode of the third diode is connected to the cathode of the fourth diode and the second phase of the first terminal of the wind power module, and the anode of the fifth diode is connected to the cathode of the sixth diode and the third phase of the first terminal of the wind power module. The cathodes of the first diode, the third diode, and the fifth diode are respectively connected to the first terminal of the filter subunit and the first terminal of the power adjustment unit. The anodes of the second diode, the fourth diode, and the sixth diode are respectively connected to the second terminal of the filter subunit and the second terminal of the power adjustment unit.

10. The wind power off-grid hydrogen production system according to claim 8, characterized in that, The power regulation unit includes: a first inductor, a first transistor, and a seventh diode; The first end of the first inductor is connected to the third end of the AC-DC conversion unit, the second end of the first inductor is connected to the collector of the first transistor and the anode of the seventh diode, the emitter of the first transistor is connected to the fourth end of the AC-DC conversion unit and the second input end of the hydrogen production module, and the gate of the first transistor is used to receive the power control signal. The negative terminal of the seventh diode is connected to the first input terminal of the hydrogen production module.

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