Wind generating set for hydrogen production, hydrogen production system and control method and controller of hydrogen production system

Abstract

The invention discloses a wind generating set for hydrogen production, a hydrogen production system, a control method of the hydrogen production system and a controller, and relates to the field of wind power generation. The wind generating set for hydrogen production comprises a generator; the hydrogen production power supply comprises a rectifier and a direct current chopper which are electrically connected, the input of the rectifier is electrically connected with the output of the generator, and the output of the direct current chopper is configured to be electrically connected with hydrogen production equipment; the direct-current energy storage module comprises a direct-current converter and a battery unit which are electrically connected, and the direct-current converter is electrically connected with the direct-current bus between the rectifier and the direct-current chopper; and the standby power module is electrically connected with the output of the generator and is used for generating electric energy to charge the direct-current energy storage module through the rectifier under the condition that the electric energy stored by the direct-current energy storage module is not enough to start the wind generating set for hydrogen production. According to the embodiment of the invention, the electric energy loss of the wind generating set for hydrogen production can be reduced, and the electric energy transmission efficiency is improved.

Description

Technical Field

[0001] The present application belongs to the field of wind power generation, and in particular relates to a wind power generator set for hydrogen production, a hydrogen production system and a control method and controller thereof. Background Art

[0002] As society continues to develop, the demand for energy is gradually increasing. In order to meet the demand for energy, renewable energy has become a key research direction. Wind power generation is one of the important development directions of renewable energy and can be applied in many fields. For example, wind power generation can be used to produce hydrogen. Wind turbines are connected to the power grid. Wind turbines convert wind energy into electrical energy, which can be provided to the power grid and hydrogen production equipment.

[0003] Figure 1 FIG. 1 is a schematic diagram of a wind power grid-connected hydrogen production system in the prior art. Figure 1 As shown, the electric energy generated by the generator 11 of the wind power generator set 10 is converted into DC electric energy by the rectifier 121 in the wind power converter 12, and then converted into AC electric energy by the inverter 122 in the wind power converter 12 and transmitted to the grid-connected boost transformer 13, and then transmitted to the power grid 14 and the hydrogen production step-down transformer 15 by the grid-connected boost transformer 13. The hydrogen production step-down transformer 15 is electrically connected to the hydrogen production equipment group 16, so that the hydrogen production equipment group 16 uses the received electric energy to produce hydrogen. In this process, the AC electric energy output by the generator 11 has successively undergone the processes of AC electric energy rectification to DC electric energy, DC electric energy inversion to AC electric energy, AC electric energy boosting to 35kV (kilovolts) through the grid-connected boost transformer 13, and AC electric energy boosted to 35kV is then stepped down to between several hundred volts and 1kV through the hydrogen production step-down transformer 15. The electric energy conversion process between the generator 11 and the hydrogen production equipment group 16 is too complicated, resulting in increased power loss and low power transmission efficiency. Summary of the invention

[0004] The embodiments of the present application provide a wind turbine generator set for hydrogen production, a hydrogen production system and a control method and a controller thereof, which can reduce the power loss of the wind turbine generator set for hydrogen production and improve the power transmission efficiency.

[0005] In a first aspect, an embodiment of the present application provides a wind turbine generator set for hydrogen production, comprising: a generator; a hydrogen production power supply, comprising an electrically connected rectifier and a DC chopper, the input of the rectifier is electrically connected to the output of the generator, and the output of the DC chopper is configured to be electrically connected to a hydrogen production device; a DC energy storage module, comprising an electrically connected DC converter and a battery unit, the DC converter is electrically connected to a DC bus between the rectifier and the DC chopper; a backup power module, electrically connected to the output of the generator, for generating electrical energy to charge the DC energy storage module through the rectifier when the electrical energy stored in the DC energy storage module is insufficient to start the wind turbine generator set for hydrogen production.

[0006] In a second aspect, an embodiment of the present application provides a hydrogen production system, comprising: the wind turbine generator set for hydrogen production of the first aspect; and hydrogen production equipment, wherein the hydrogen production equipment is electrically connected to the output of a DC chopper in a hydrogen production power supply of the wind turbine generator set for hydrogen production.

[0007] In a third aspect, an embodiment of the present application provides a control method for a hydrogen production system, which is applied to the hydrogen production system of the second aspect, the method comprising: obtaining energy storage information of a DC energy storage module; when the energy storage information indicates that the stored power is less than the power required to start, controlling the backup power module to generate electric energy to charge the DC energy storage module, so that the power stored in the DC energy storage module is greater than or equal to the power required to start; when the energy storage information indicates that the stored power is greater than or equal to the power required to start, controlling the DC energy storage module to provide starting power for a wind turbine generator set for hydrogen production; and controlling the wind turbine generator set for hydrogen production to start and supply power to the hydrogen production equipment.

[0008] In a fourth aspect, an embodiment of the present application provides a controller, comprising: a processor and a memory storing computer program instructions; when the processor executes the computer program instructions, the control method of the hydrogen production system of the third aspect is implemented.

[0009] The embodiment of the present application provides a wind turbine generator set for hydrogen production, a hydrogen production system and its control method and controller. The wind turbine generator set for hydrogen production may include a generator, a hydrogen production power supply, a DC energy storage module and a backup power module. The output of the generator can be directly connected to the hydrogen production power supply and the backup power module. The hydrogen production power supply includes a rectifier and a DC chopper, which can convert the AC power output by the generator into DC power suitable for hydrogen production. The DC bus between the rectifier and the DC chopper is electrically connected to the DC energy storage module. The output of the DC chopper is configured to be electrically connected to the hydrogen production equipment, and can directly power the hydrogen production equipment. The electric energy output by the generator does not need to pass through the rectifier in the wind power converter, the inverter in the wind power converter, the grid-connected step-up transformer and the hydrogen production step-down transformer, which reduces the link of power conversion between the generator and the hydrogen production equipment, reduces power loss, and improves power transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0011] Figure 1 It is a structural schematic diagram of a wind power generation grid-connected hydrogen production system in the prior art;

[0012] Figure 2 A schematic diagram of the structure of a wind turbine generator set for hydrogen production provided in one embodiment of the present application;

[0013] Figure 3 A schematic structural diagram of an example of a DC energy storage module provided in an embodiment of the present application;

[0014] Figure 4 A schematic structural diagram of another example of a DC energy storage module provided in an embodiment of the present application;

[0015] Figure 5 A schematic diagram of the structure of an example of a hydrogen production power supply provided in an embodiment of the present application;

[0016] Figure 6 A schematic diagram of another example of a hydrogen production power supply provided in an embodiment of the present application;

[0017] Figure 7 A schematic diagram of the structure of a hydrogen production system provided in one embodiment of the present application;

[0018] Figure 8 A schematic diagram of an example of a control subsystem provided in an embodiment of the present application;

[0019] Fig. 9 A flow chart of a control method for a hydrogen production system provided in one embodiment of the present application;

[0020] Fig.10 A flow chart of a control method for a hydrogen production system provided in another embodiment of the present application;

[0021] Fig.11 A schematic diagram of the structure of a controller provided in one embodiment of the present application. DETAILED DESCRIPTION

[0022] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0023] As society continues to develop, the demand for energy is gradually increasing. In order to meet the demand for energy, renewable energy has become a key research direction. Wind power generation is one of the important development directions of renewable energy and can be applied in many fields. For example, wind power generation can be used to produce hydrogen. Wind turbines are connected to the power grid. Wind turbines convert wind energy into electrical energy, which can be provided to the power grid and hydrogen production equipment. Figure 1FIG. 1 is a schematic diagram of a wind power grid-connected hydrogen production system in the prior art. Figure 1 As shown, the electric energy generated by the generator 11 of the wind power generator set 10 is converted into DC electric energy by the rectifier 121 in the wind power converter 12, and then converted into AC electric energy by the inverter 122 in the wind power converter 12 and transmitted to the grid-connected boost transformer 13, and then transmitted to the power grid 14 and the hydrogen production step-down transformer 15 by the grid-connected boost transformer 13. The hydrogen production step-down transformer 15 is electrically connected to the hydrogen production equipment group 16, so that the hydrogen production equipment group 16 uses the received electric energy to produce hydrogen. In this process, the AC electric energy output by the generator 11 has successively undergone the processes of AC electric energy rectification to DC electric energy, DC electric energy inversion to AC electric energy, AC electric energy boosting to 35kV (kilovolts) through the grid-connected boost transformer 13, and AC electric energy boosted to 35kV is then stepped down to between several hundred volts and 1kV through the hydrogen production step-down transformer 15. The electric energy conversion process between the generator 11 and the hydrogen production equipment group 16 is too complicated, resulting in increased power loss and low power transmission efficiency. Moreover, as the hydrogen production capacity of hydrogen production projects gradually increases, it can reach the level of 100,000 tons and 200,000 tons. In the scenario of wind turbines connected to the grid for hydrogen production, the power grid cannot help with the peak regulation of hydrogen production and it is difficult to meet the hydrogen production demand.

[0024] The present application provides a wind turbine generator set for hydrogen production, a hydrogen production system and a control method and controller thereof. The wind turbine generator set for hydrogen production may include a generator, a hydrogen production power supply, a DC energy storage module and a backup power module. The output of the generator can be directly connected to the hydrogen production power supply. The hydrogen production power supply includes a rectifier and a DC chopper, which can convert the AC power output by the generator into DC power suitable for hydrogen production. The output of the DC chopper is configured to be electrically connected to the hydrogen production equipment and can directly power the hydrogen production equipment. The electric energy output by the generator does not need to pass through the rectifier in the wind power converter, the inverter in the wind power converter, the grid-connected step-up transformer and the hydrogen production step-down transformer, which reduces the link of power conversion between the generator and the hydrogen production equipment, reduces power loss, and improves power transmission efficiency. In addition, the wind turbine generator set for hydrogen production in the present application does not need to be connected to the grid, and can form an off-grid hydrogen production system with the hydrogen production equipment to meet the hydrogen production needs. The DC energy storage module and the hydrogen production power source include a DC busbar electrical connection between a rectifier and a DC chopper. When the wind turbine generator set for hydrogen production is not connected to the grid, the DC power released by the DC energy storage module can be converted into AC power by the rectifier as starting energy to provide to other power-demanding parts of the wind turbine generator set. Starting energy can also be provided for the rectifier, DC chopper and other devices, which are not limited here, thereby achieving a black start of the wind turbine generator set for hydrogen production. When the DC energy storage module does not store enough electric energy, the backup power module can charge the DC energy storage module so that the DC energy storage module provides starting energy for the wind turbine generator set for hydrogen production, further improving the reliability of the black start of the wind turbine generator set for hydrogen production.

[0025] The wind turbine generator set for hydrogen production, the hydrogen production system and its control method and controller are described below respectively.

[0026] A first aspect of the present application provides a wind turbine generator set for producing hydrogen. Figure 2 A schematic diagram of the structure of a wind turbine generator set for hydrogen production provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the wind turbine generator set 20 for hydrogen production may include a generator 21 , a hydrogen production power source 22 , a DC energy storage module 23 and a backup power module 24 .

[0027] The hydrogen production power supply 22 may include an electrically connected rectifier 221 and a DC chopper 222. The input of the rectifier 221 is electrically connected to the output of the generator 21. The output of the rectifier 221 is electrically connected to the input of the DC chopper 222. The output of the DC chopper 222 is configured to be electrically connected to the hydrogen production equipment. The output of the hydrogen production power supply 22 may include the output of the DC chopper 222, and the output of the DC chopper 222 is the output of the wind turbine generator set 20 for hydrogen production.

[0028] The wind turbine generator set 20 for hydrogen production may further include a transmission structure 25, which may convert wind energy into mechanical energy and transmit it to the generator 21. The generator 21 converts the mechanical energy into AC power and outputs it to the hydrogen production power supply 22. The hydrogen production power supply 22 is used to convert the AC power output by the generator 21 into DC power suitable for the requirements of the hydrogen production equipment, and directly provide it to the hydrogen production equipment. Specifically, the rectifier 221 may convert the AC power output by the generator 21 into DC power, and the DC chopper 222 converts the DC power into DC power suitable for the requirements of the hydrogen production equipment.

[0029] The DC energy storage module 23 includes a DC converter 231 and a battery unit 232 which are electrically connected. The DC converter 231 is electrically connected to a DC bus between the rectifier 221 and the DC chopper 222 .

[0030] The DC energy storage module 23 can be used to store and release electrical energy. When the wind turbine generator set 20 for hydrogen production needs to be started, the DC energy storage module 23 can provide starting power for the wind turbine generator set 20 for hydrogen production. Specifically, the battery unit 232 can release the stored DC power to the DC converter 231, and the DC converter 231 converts the DC power into DC power suitable for the DC bus between the rectifier 221 and the DC chopper 222. The DC power can be converted by the rectifier 221 to obtain AC power, and provide starting power for the part of the wind turbine generator set 20 for hydrogen production that needs AC power to start. The DC power can also be transmitted to the part of the wind turbine generator set 20 for hydrogen production that needs DC power to start to provide starting power, so as to achieve the black start of the wind turbine generator set 20 for hydrogen production.

[0031] The backup power module 24 is electrically connected to the output of the generator 21. The backup power module 24 can be used to generate electric energy to charge the DC energy storage module 23 when the electric energy stored in the DC energy storage module 23 is insufficient to start the wind turbine generator set 20 for hydrogen production, until the electric energy stored in the DC energy storage module 23 is sufficient to start the wind turbine generator set 20 for hydrogen production, so that the DC energy storage module 23 provides starting electric energy for the wind turbine generator set 20 for hydrogen production.

[0032] In an embodiment of the present application, a wind turbine generator set 20 for hydrogen production may include a generator 21, a hydrogen production power supply 22, a DC energy storage module 23, and a backup power module 24. The output of the generator 21 can be directly connected to the hydrogen production power supply 22 and the backup power module 24. The hydrogen production power supply 22 includes a rectifier 221 and a DC chopper 222, which can convert the AC power output by the generator 21 into DC power suitable for hydrogen production. The DC bus between the rectifier 221 and the DC chopper 222 is electrically connected to the DC energy storage module 23, and the output of the DC chopper 222 is configured to be electrically connected to the hydrogen production equipment, which can directly power the hydrogen production equipment. The electric energy output by the generator 21 does not need to pass through the rectifier in the wind power converter, the inverter in the wind power converter, the grid-connected step-up transformer, and the hydrogen production step-down transformer, which reduces the link of power conversion between the generator 21 and the hydrogen production equipment, reduces power loss, and improves power transmission efficiency. The wind power converter in the hydrogen production wind generator set is replaced by the hydrogen production power supply 22, and the output of the hydrogen production wind generator set is changed from AC to DC, which saves the electrical circuit of the hydrogen production wind generator set, reduces the cost of the hydrogen production wind generator set, and is more convenient for the large-scale promotion of green hydrogen production. In addition, the hydrogen production wind generator set 20 in the embodiment of the present application does not need to be connected to the grid, and can be combined with the hydrogen production equipment to form an off-grid hydrogen production system to meet the hydrogen production needs. In the case where the hydrogen production wind generator set 20 is not connected to the grid, the DC energy storage module 23 can provide starting energy for the hydrogen production wind generator set 20 to achieve the black start of the hydrogen production wind generator set 20. In the case where the DC energy storage module 23 does not store enough electric energy, the backup power module 24 can charge the DC energy storage module 23 through the rectifier 221, so that the DC energy storage module 23 provides starting energy for the hydrogen production wind generator set 20, further improving the reliability of the black start of the hydrogen production wind generator set 20.

[0033] In the embodiment of the present application, the DC converter 231 in the DC energy storage module 23 can receive the DC power transmitted by the rectifier 221 through the DC bus and convert it into charging the battery unit 232, and can also convert the DC power output by the battery unit 232 and transmit it to the DC bus to provide it to the DC chopper 222, so that the DC chopper 222 converts it into power supply for the hydrogen production equipment. The DC converter 231 is used to realize the bidirectional conversion of power between the DC bus and the battery unit 232, thereby completing the matching of power between the DC bus and the battery unit 232.

[0034] In some embodiments, the DC converter 231 in the DC energy storage module 23 may include a first capacitor group, a bidirectional half-bridge buck-boost conversion unit, and a second capacitor group electrically connected in sequence. Figure 3 A schematic diagram of an example of a DC energy storage module provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, both ends of the first capacitor group 2311 and the first connection end and the second connection end of the bidirectional half-bridge buck-boost conversion unit 2312 are electrically connected to the DC bus, and the third connection end and the fourth connection end of the bidirectional half-bridge buck-boost conversion unit 2312 and both ends of the second capacitor group 2313 are electrically connected to the battery unit 232. The first capacitor group 2311 may include one or more capacitors, and the second capacitor group 2313 may include one or more capacitors, which are not limited here.

[0035] The bidirectional half-bridge buck-boost conversion unit 2312 can realize voltage boost and voltage reduction, thereby realizing bidirectional conversion of boost and voltage reduction of DC power between the DC bus and the battery unit 232. The voltage parameter and current parameter of the side where the bidirectional half-bridge buck-boost conversion unit 2312 is electrically connected to the DC bus are associated with the voltage parameter and current parameter output by the rectifier 221, and the voltage parameter and current parameter of the side where the bidirectional half-bridge buck-boost conversion unit 2312 is electrically connected to the battery unit 232 are associated with the voltage parameter and current parameter of the battery unit 232. The bidirectional half-bridge buck-boost conversion unit 2312 can be designed according to the voltage parameter and current parameter output by the rectifier 221 and the voltage parameter and current parameter of the battery unit 232. The battery unit 232 may include battery cells connected in series and / or in parallel, and the number and connection relationship of the battery cells in the battery unit 232 are not limited here.

[0036] Specifically, the bidirectional half-bridge buck-boost conversion unit 2312 includes a first switch tube, a second switch tube, a third switch tube, a fourth switch tube and a first inductor. The first connection end of the bidirectional half-bridge buck-boost conversion unit 2312 includes the first end of the first switch tube, the second connection end of the bidirectional half-bridge buck-boost conversion unit 2312 includes the second end of the second switch tube, and the second end of the first switch tube is electrically connected to the first end of the second switch tube. The third connection end of the bidirectional half-bridge buck-boost conversion unit 2312 includes the first end of the third switch tube, the fourth connection end of the bidirectional half-bridge buck-boost conversion unit 2312 includes the second end of the fourth switch tube, and the second end of the third switch tube is electrically connected to the first end of the fourth switch tube. One end of the first inductor is electrically connected to the second end of the first switch tube and the first end of the second switch tube, and the other end of the first inductor is electrically connected to the second end of the third switch tube and the first end of the fourth switch tube.

[0037] like Figure 3As shown, the first switch tube, the second switch tube, the third switch tube, and the fourth switch tube in the bidirectional half-bridge buck-boost conversion unit 2312 can be implemented as switch tubes T1, T2, T3, and T4, and the first inductor in the bidirectional half-bridge buck-boost conversion unit 2312 can be implemented as inductor L1. The first capacitor group 2311 can be implemented as capacitor C1, and the second capacitor group 2313 can be implemented as capacitor C2. One end of capacitor C1 is electrically connected to the positive bus of the DC bus, and the other end of capacitor C1 is electrically connected to the negative bus of the DC bus. The first end of switch tube T1 is electrically connected to one end of capacitor C1 and the positive bus of the DC bus, and the second end of switch tube T1 is electrically connected to the first end of switch tube T2. The second end of switch tube T2 is electrically connected to the other end of capacitor C1 and the negative bus of the DC bus. The first end of switch tube T3 is electrically connected to one end of capacitor C2 and the battery unit 232, and the second end of switch tube T3 is electrically connected to the first end of switch tube T4. The second end of the switch tube T4 is electrically connected to the other end of the capacitor C2 and the battery unit 232. One end of the inductor L1 is electrically connected to the second end of the switch tube T1 and the first end of the switch tube T2, and the other end of the inductor L1 is electrically connected to the second end of the switch tube T3 and the first end of the switch tube T4.

[0038] In other embodiments, the voltage level of the rectifier 221 in the hydrogen production power supply 22 can be set according to demand. If the voltage level of the rectifier 221 is high, without changing the technical parameters of the switch tube in the DC converter 231, the bidirectional half-bridge buck-boost conversion unit 2312 in the above embodiment is difficult to match the relatively high voltage output by the rectifier 221. In order to improve the voltage tolerance of the DC converter 231 and match the relatively high voltage output by the rectifier 221, the DC converter 231 in this embodiment can be used. The DC converter 231 in the DC energy storage module 23 in this embodiment may include a third capacitor group, two bidirectional half-bridge buck-boost conversion units connected in series, and a fourth capacitor group that are electrically connected in sequence. The third capacitor group includes two first capacitor subgroups connected in series, and the fourth capacitor group includes two second capacitor subgroups connected in series. Figure 4 A schematic diagram of another example of a DC energy storage module provided in an embodiment of the present application is shown in FIG. Figure 4As shown, two ends of the third capacitor group 2314 and the first connection end of one of the bidirectional half-bridge buck-boost conversion units 2312a, and the second connection end of another bidirectional half-bridge buck-boost conversion unit 2312b are electrically connected to the DC bus, the third connection end of one of the bidirectional half-bridge buck-boost conversion units 2312a, the fourth connection end of another of the bidirectional half-bridge buck-boost conversion units 2312b, and two ends of the fourth capacitor group 2315 are electrically connected to the battery unit 232, and one end of the two first capacitor sub-groups connected in series, the second connection end of one of the bidirectional half-bridge buck-boost conversion units 2312a, the first connection end of another of the bidirectional half-bridge buck-boost conversion units 2312b, the fourth connection end of one of the bidirectional half-bridge buck-boost conversion units 2312a, the third connection end of another of the bidirectional half-bridge buck-boost conversion units 2312b, and one end of the two second capacitor sub-groups connected in series are electrically connected. Each first capacitor subgroup in the third capacitor group 2314 may include one or more capacitors, and each second capacitor subgroup in the fourth capacitor group 2315 may include one or more capacitors, which is not limited here.

[0039] The bidirectional half-bridge buck-boost conversion unit 2312a and the bidirectional half-bridge buck-boost conversion unit 2312b connected in series can realize voltage boost and voltage reduction, thereby realizing bidirectional conversion of DC power between the DC bus and the battery unit 232.

[0040] Specifically, the bidirectional half-bridge buck-boost conversion unit 2312a and the bidirectional half-bridge buck-boost conversion unit 2312b may each include a first switch tube, a second switch tube, a third switch tube, a fourth switch tube and a first inductor. In each bidirectional half-bridge buck-boost conversion unit, the first connection end of the bidirectional half-bridge buck-boost conversion unit includes the first end of the first switch tube, the second connection end of the bidirectional half-bridge buck-boost conversion unit includes the second end of the second switch tube, and the second end of the first switch tube is electrically connected to the first end of the second switch tube. The third connection end of the bidirectional half-bridge buck-boost conversion unit includes the first end of the third switch tube, the fourth connection end of the bidirectional half-bridge buck-boost conversion unit includes the second end of the fourth switch tube, and the second end of the third switch tube is electrically connected to the first end of the fourth switch tube. One end of the first inductor is electrically connected to the second end of the first switch tube and the first end of the second switch tube, and the other end of the first inductor is electrically connected to the second end of the third switch tube and the first end of the fourth switch tube.

[0041] like Figure 4As shown, the first switch tube, the second switch tube, the third switch tube, and the fourth switch tube in the bidirectional half-bridge buck-boost conversion unit 2312a can be implemented as switch tube T5, switch tube T6, switch tube T7, and switch tube T8, and the first inductor in the bidirectional half-bridge buck-boost conversion unit 2312a can be implemented as L2. The first switch tube, the second switch tube, the third switch tube, and the fourth switch tube in the bidirectional half-bridge buck-boost conversion unit 2312b can be implemented as switch tube T9, switch tube T10, switch tube T11, and switch tube T12, and the first inductor in the bidirectional half-bridge buck-boost conversion unit 2312b can be implemented as L3. The two first capacitor subgroups in the third capacitor group 2314 are respectively implemented as capacitor C3 and capacitor C4. The two second capacitor subgroups in the fourth capacitor group 2315 are respectively implemented as capacitor C5 and capacitor C6.

[0042] One end of the capacitor C3 is electrically connected to the first end of the switch tube T5 and the positive busbar of the DC bus, and the other end of the capacitor C3 is electrically connected to one end of the capacitor C4. The first end of the switch tube T5 is electrically connected to one end of the capacitor C3 and the positive busbar of the DC bus, and the second end of the switch tube T5 is electrically connected to the first end of the switch tube T6. The first end of the switch tube T7 is electrically connected to one end of the capacitor C5 and the battery unit 232, and the second end of the switch tube T7 is electrically connected to the first end of the switch tube T8. The first end of the capacitor C5 is electrically connected to the first end of the switch tube T7 and the battery unit 232. One end of the inductor L2 is electrically connected to the second end of the switch tube T5 and the first end of the switch tube T6, and the other end of the inductor L2 is electrically connected to the second end of the switch tube T7 and the first end of the switch tube T8. The other end of the capacitor C3, one end of the capacitor C4, the second end of the switch tube T6, the first end of the switch tube T9, the second end of the switch tube T8, the first end of the switch tube T11, the other end of the capacitor C5, and one end of the capacitor C6 are electrically connected. The second end of the switch tube T9 is electrically connected to the first end of the switch tube T10, and the second end of the switch tube T10 is electrically connected to the other end of the capacitor C4 and the negative bus of the DC bus. The second end of the switch tube T11 is electrically connected to the first end of the switch tube T12, and the second end of the switch tube T12 is electrically connected to the other end of the capacitor C6 and the battery unit 232. One end of the inductor L3 is electrically connected to the second end of the switch tube T9 and the first end of the switch tube T10, and the other end of the inductor L3 is electrically connected to the second end of the switch tube T11 and the first end of the switch tube T12.

[0043] The hydrogen production equipment in the above embodiment generally produces hydrogen by electrolyzing water, and has high requirements for the ripple current accuracy of DC power to improve the purity of hydrogen produced by electrolyzing water. The DC chopper 222 in the above embodiment can be used to convert the DC power output by the rectifier 221 into DC power with a current accuracy less than or equal to the hydrogen production requirement accuracy threshold. The current accuracy can be the ratio of the ripple current to the output current. The hydrogen production requirement accuracy threshold is the maximum value of the current accuracy required to ensure the purity of the hydrogen produced by the hydrogen production equipment, such as the hydrogen production requirement accuracy threshold is 0.5%. The current accuracy of the DC power output by the DC chopper 222 can be less than or equal to the hydrogen production requirement accuracy threshold, and the DC power is provided to the hydrogen production equipment to meet the requirements of the hydrogen production equipment for the purity of the produced hydrogen.

[0044] In some examples, the DC chopper 222 may include N-phase reactors, where N is an integer greater than or equal to 2, and may be set according to the specific requirements of the hydrogen production power supply. For example, N may be 2, 3, or 4, which is not limited here. The currents passing through each phase reactor in the DC chopper 222 are interlaced with each other, thereby offsetting part of the ripple current, reducing the ripple current, improving the current accuracy, and making the current accuracy of the DC power output by the DC chopper 222 less than or equal to the hydrogen production requirement accuracy threshold, thereby meeting the power demand of the hydrogen production equipment.

[0045] In some embodiments, the rectifier 221 includes a three-phase AC filter, an AC-DC conversion unit, and a fifth capacitor group electrically connected in sequence. The three-phase AC filter is electrically connected to the output of the generator 21, and the DC end of the AC-DC conversion unit and the fifth capacitor group are electrically connected to the DC chopper 222. The DC chopper 222 may include N-phase chopper units, where N is an integer greater than or equal to 2. Figure 5 This is a schematic diagram of an example of a hydrogen production power supply provided in an embodiment of the present application. Figure 6 This is a schematic diagram of another example of a hydrogen production power supply provided in an embodiment of the present application. Figure 5 The rectifier 221 in Figure 6 The structure of the rectifier 221 in is different.

[0046] like Figure 5As shown, the three-phase AC filter 2211 in the rectifier 221 can be implemented as three-phase inductors L4, L5 and L6. The AC-DC conversion unit 2212 in the rectifier 221 is a two-level rectification structure and may include a three-phase bridge arm. The first phase bridge arm includes a switch tube T13 and a switch tube T14 connected in series, the second phase bridge arm includes a switch tube T15 and a switch tube T16 connected in series, and the third phase bridge arm includes a switch tube T17 and a switch tube T18 connected in series. The first end of the switch tube T13, the first end of the switch tube T15 and the first end of the switch tube T17 are electrically connected, the second end of the switch tube T14, the second end of the switch tube T16 and the second end of the switch tube T18 are electrically connected, the second end of the switch tube T13 is electrically connected to the first end of the switch tube T14, the second end of the switch tube T15 is electrically connected to the first end of the switch tube T16, and the second end of the switch tube T17 is electrically connected to the first end of the switch tube T18. The AC-DC conversion unit 2212 has an AC end and a DC end. The AC end of the AC-DC conversion unit 2212 is electrically connected to the three-phase AC filter 2211. The AC end of the AC-DC conversion unit 2212 includes a first-phase AC end, a second-phase AC end, and a third-phase AC end. The first-phase AC end includes the second end of the switch tube T13 and the first end of the switch tube T14. The second-phase AC end includes the second end of the switch tube T15 and the first end of the switch tube T16. The third-phase AC end includes the second end of the switch tube T17 and the first end of the switch tube T18. The DC end of the AC-DC conversion unit 2212 may include a first DC end and a second DC end. The first DC end includes the first end of the switch tube T13, the first end of the switch tube T15, and the first end of the switch tube T17. The second DC end includes the second end of the switch tube T14, the second end of the switch tube T16, and the second end of the switch tube T18. The fifth capacitor group 2213 can be implemented as a capacitor C7, and the capacitor C7 is connected in parallel with the AC-DC conversion unit 2212.

[0047] like Figure 6As shown, the three-phase AC filter 2211 in the rectifier 221 can be implemented as three-phase inductors L4, L5 and L6. The AC-DC conversion unit 2212 in the rectifier 221 is a three-level rectification structure and may include a three-phase bridge arm. The first-phase bridge arm includes a series-connected switch tube T19, a switch tube T20, a switch tube T21 and a switch tube T22, and a series-connected diode D1 and a diode D2; the second-phase bridge arm includes a series-connected switch tube T23, a switch tube T24, a switch tube T25 and a switch tube T26, and a series-connected diode D3 and a diode D4; the first-phase bridge arm includes a series-connected switch tube T27, a switch tube T28, a switch tube T29 and a switch tube T30, and a series-connected diode D5 and a diode D6. The series diode D1 and the series diode D2 are connected in parallel with the series switch tube T20 and the series switch tube T21, the series diode D3 and the series diode D4 are connected in parallel with the series switch tube T24 and the series switch tube T25, and the series diode D5 and the series diode D6 are connected in parallel with the series switch tube T28 and the series switch tube T29. The first end of the switch tube T19, the first end of the switch tube T23, and the first end of the switch tube T27 are electrically connected, and the second end of the switch tube T22, the second end of the switch tube T26, and the second end of the switch tube T30 are electrically connected. The AC-DC conversion unit 2212 has an AC end and a DC end. The AC end of the AC-DC conversion unit 2212 is electrically connected to the three-phase AC filter 2211. The AC end of the AC-DC conversion unit 2212 includes a first-phase AC end, a second-phase AC end, and a third-phase AC end. The first-phase AC end includes the second end of the switch tube T20 and the first end of the switch tube T21. The second-phase AC end includes the second end of the switch tube T24 and the first end of the switch tube T25. The third-phase AC end includes the second end of the switch tube T28 and the first end of the switch tube T29. The DC end of the AC-DC conversion unit 2212 may include a first DC end and a second DC end. The first DC end includes the first end of the switch tube T19, the first end of the switch tube T23, and the first end of the switch tube T27. The second DC end includes the second end of the switch tube T22, the second end of the switch tube T26, and the second end of the switch tube T30. The fifth capacitor group 2213 can be implemented as a capacitor C8 and a capacitor C9 connected in series, one end of the capacitor C8 is electrically connected to the first DC end of the AC-DC conversion unit 2212, the other end of the capacitor C8, one end of the capacitor C9, the anode of the diode D1, the cathode of the diode D2, the anode of the diode D3, the cathode of the diode D4, the anode of the diode D5 and the cathode of the diode D6 are electrically connected, and the other end of the capacitor C9 is electrically connected to the second DC end of the AC-DC conversion unit 2212.

[0048] The DC power output by the DC chopper 222 is directly supplied to the hydrogen production equipment for hydrogen production, and the hydrogen production equipment has high requirements for the current accuracy of the DC power used for hydrogen production. The DC chopper 222 may include N-phase chopper units, where N is an integer greater than or equal to 2, and can be set according to the specific requirements of the hydrogen production power supply. For example, N can be 2, 3 or 4, which is not limited here. Each phase chopper unit may include a corresponding one-phase reactor. By controlling the conduction and shutdown of the N-phase chopper units, the currents passing through each phase reactor can be staggered with each other, thereby offsetting part of the ripple current and improving the current accuracy, so as to meet the requirements of the hydrogen production equipment for the DC power used for hydrogen production.

[0049] like Figure 5 and Figure 6 As shown, N-phase chopper units are staggered in parallel, the first connection end of each phase chopper unit is electrically connected to the first DC output end of the rectifier 221, the second connection end of each phase chopper unit is electrically connected to the second DC output end of the rectifier 221, the third connection end of the N-phase chopper unit is electrically connected, and the output of the DC chopper 222 includes the second connection end and the third connection end of the chopper unit. The first DC output end of the rectifier 221 includes the first DC end of the AC-DC conversion unit 2212 and one end of the capacitor C2, and the second DC output end of the rectifier 221 includes the second DC end of the AC-DC conversion unit 2212 and the other end of the capacitor C3. The second connection end and the third connection end of the chopper unit can be configured to be electrically connected to the hydrogen production equipment. The phases of the current output from the third connection end of the N-phase chopper unit are staggered. Each phase chopper unit may include a switch tube and a reactor, and the N-phase chopper units jointly bear the output current, which reduces the current stress of the switch tube in the chopper unit and reduces the conduction loss of the DC chopper 222. The N-phase chopper units are staggered in parallel, and the inductance of the reactor in the DC chopper 222 is relatively small, which can improve the transient response speed. The phases of the currents output from the third connection terminals of the N-phase chopper units are staggered, and a higher frequency output can be achieved by using a lower switching frequency of the switch tube. For example, if the switching frequency of the switch tube in each phase chopper unit is f, the frequency output of the DC chopper 222 can reach Nf, achieving a double frequency output, thereby reducing the switching loss of the DC chopper 222 and improving the efficiency of the DC chopper 222.

[0050] In some examples, each phase chopper unit includes a first inductor, a fifth switch tube, and a sixth switch tube. The first connection end of the chopper unit includes the first end of the fifth switch tube, the second end of the fifth switch tube is electrically connected to the first end of the sixth switch tube, the second connection end of the chopper unit includes the second end of the sixth switch tube, the first end of the first inductor is electrically connected to the second end of the fifth switch tube and the first end of the sixth switch tube, and the third connection end of the chopper unit includes the second end of the first inductor.

[0051] like Figure 5 and Figure 6 As shown, the DC chopper 222 includes an N-phase chopping unit ( Figure 5 and Figure 6 Only the first phase chopper unit and the Nth phase chopper unit are shown in the figure, the first reactor in the first phase chopper unit is the reactor L7, the first switch tube in the first phase chopper unit is the switch tube T31, the second switch tube in the first phase chopper unit is the switch tube T32, the first reactor in the Nth phase chopper unit is the reactor L8, the first switch tube in the Nth phase chopper unit is the switch tube T33, and the second switch tube in the Nth phase chopper unit is the switch tube T34. The first end of the switch tube T31 is electrically connected to the first end of the switch tube T33, the second end of the switch tube T31, the first end of the switch tube T32 and the first end of the reactor L7 are electrically connected, the second end of the switch tube T33, the first end of the switch tube T34 and the first end of the reactor L8 are electrically connected, the second end of the switch tube T32 is electrically connected to the second end of the switch tube T34, the second end of the reactor L7, the second end of the reactor L8, the second end of the switch tube T32 and the second end of the switch tube T34 are electrically connected to the hydrogen production equipment. The switch tube control signals of the N-phase chopper unit are staggered 360° / N, and the switch tube control signals are used to control the on and off of the fifth switch tube and the sixth switch tube. The switch tube control signals are used to control the on and off of the switch tubes in the N-phase chopper unit, so that the switch tubes of the N-phase chopper unit are staggered, and a higher frequency output is achieved using a lower switching frequency. The switch tube control signals of the N-phase chopper unit are staggered 360° / N, so that the current output by the N-phase chopper unit presents a phase staggered state, and the output current with a smaller ripple is formed by the mutual cancellation of the current ripples, thereby improving the accuracy of the DC current.

[0052] In some embodiments, Figure 2 As shown, the backup power module 24 may include an electrically connected transformer 241 and a power generation unit 242. The power generation unit 242 can generate electricity when the electric energy stored in the DC energy storage module 23 is insufficient to start the wind turbine generator set 20 for hydrogen production. The type of the power generation unit 242 is not limited here. For example, the power generation unit 242 can be implemented as a diesel generator. The transformer 241 can transform the electric energy generated by the power generation unit 242 so that the electric energy output by the transformer meets the requirements of the electric energy transmitted between the generator 21 and the hydrogen production unit 22. The electric energy output by the transformer is transmitted to the rectifier 221, and the rectifier 221 converts the electric energy into DC electric energy, and transmits it to the DC energy storage module 23 through the DC bus.

[0053] The switch tube in the above embodiment may include an insulated gate bipolar transistor (IGBT) or other types of switch tubes, which are not limited here. In some examples, when the switch tube in the above embodiment includes an IGBT, the first end of the switch tube is the collector of the IGBT, and the second end of the switch tube is the emitter of the IGBT.

[0054] A second aspect of the present application provides a hydrogen production system. Figure 7 A schematic diagram of the structure of a hydrogen production system provided in one embodiment of the present application is shown in FIG. Figure 7 As shown, the hydrogen production system includes the wind turbine generator set 20 for hydrogen production and the hydrogen production equipment 30 in the above embodiment.

[0055] The hydrogen production equipment 30 is electrically connected to the output of the DC chopper 222 in the hydrogen production power supply 22 of the hydrogen production wind turbine 20. The output of the hydrogen production wind turbine 20 includes the output of the hydrogen production power supply 22, and the output of the hydrogen production power supply 22 includes the output of the DC chopper 222. The DC power output of the hydrogen production power supply 22 is directly provided to the hydrogen production equipment 30. The hydrogen production equipment 30 can produce hydrogen using the received DC power.

[0056] In some examples, the hydrogen production device 30 can use direct current power to electrolyze water to produce hydrogen. Figure 7 As shown, the hydrogen production equipment 30 may include a hydrogen production electrolysis device 31 and a hydrogen storage device 32. The hydrogen production electrolysis device 31 may include an electrolyzer, a hydrogen separation device, a hydrogen purification device, and a hydrogen pressurizing device, etc., which are not limited here. The electrolyzer may have a positive electrode interface and a negative electrode interface, and the positive electrode interface and the negative electrode interface of the electrolyzer may be electrically connected to the output of the DC chopper 222. The electrolyzer may use the DC power output by the hydrogen production wind turbine 20 to electrolyze water to obtain hydrogen and other components. The hydrogen separation device may separate hydrogen from other components. The hydrogen purification device may further purify the separated hydrogen. The hydrogen pressurizing device may pressurize the purified hydrogen for storage or transportation. The hydrogen storage device 32 may be connected to the hydrogen production electrolysis device 31 through a pipeline, and the hydrogen produced by the hydrogen production electrolysis device 31 may be transmitted to the hydrogen storage device 32 through the pipeline.

[0057] The hydrogen production system includes a wind turbine generator set 20 for hydrogen production. For details, please refer to the relevant descriptions in the above embodiments, and the same technical effects can be achieved. To avoid repetition, they will not be described here.

[0058] In some embodiments, the hydrogen production system may further include a control subsystem. Figure 8 A schematic diagram of an example of a control subsystem provided in an embodiment of the present application, such as Figure 8As shown, the control subsystem includes a wind farm hydrogen production energy management subsystem 51, a wind power prediction device 52, a load prediction device 53, a hydrogen production power supply control subsystem 54, a main control and pitch control subsystem 55, a DC energy storage control subsystem 56 and a backup power control subsystem 57.

[0059] The wind power prediction device 52 can be used to obtain the power generation of the generator. Specifically, the wind power prediction device 52 can estimate the power generation of the generator according to the power information of the generator.

[0060] The load prediction device 53 is used to obtain the hydrogen production load demand power of the hydrogen production equipment. Specifically, the load prediction device 53 can determine the hydrogen production load demand power according to the hydrogen production demand information of the hydrogen production equipment 30.

[0061] The wind farm hydrogen production energy management subsystem 51 is in communication connection with the wind power prediction device 52 and the load prediction device 53 , and is used to obtain the power generation from the wind power prediction device 52 and the power demand of the hydrogen production load from the load prediction device 53 .

[0062] The hydrogen production power supply control subsystem 54 is communicatively connected with the wind farm hydrogen production energy management subsystem 51, and is used to obtain the power generation and hydrogen production load demand from the wind farm hydrogen production energy management subsystem 51, and control the main control and pitch control subsystem 55, the DC energy storage control subsystem 56 and the backup power control subsystem 57 according to the power generation and the hydrogen production load demand.

[0063] The main control and pitch control subsystem 55 is connected to the hydrogen production power supply control subsystem 54 .

[0064] The DC energy storage control subsystem 56 is connected to the hydrogen production power supply control subsystem 54 and is used to control the DC energy storage module in the hydrogen production wind turbine generator set under the control of the hydrogen production power supply control subsystem 54 .

[0065] The backup power control subsystem 57 is connected to the hydrogen production power supply control subsystem 54 and is used to control the backup power module in the hydrogen production wind turbine generator set under the control of the hydrogen production power supply control subsystem.

[0066] The wind farm hydrogen production energy management subsystem 51 can obtain the power generation of the generator obtained by the wind power prediction device 52 and the hydrogen production load demand power of the hydrogen production equipment obtained by the load prediction device 53. The wind farm hydrogen production energy management subsystem 51 can transmit the power generation of the generator and the hydrogen production load demand power of the hydrogen production equipment to the hydrogen production power supply control subsystem 54. The hydrogen production power supply control subsystem 54 can interact with the main control and pitch control subsystem 55, the DC energy storage control subsystem 56 and the backup power control subsystem 57, and control the DC energy storage module through the DC energy storage control subsystem 56, and control the backup power module through the backup power control subsystem 57.

[0067] A third aspect of the present application provides a control method for a hydrogen production system, which can be applied to the hydrogen production system in the above-mentioned embodiment and can be specifically executed by a controller, a control system, etc., and is not limited here. Fig. 9 A flow chart of a control method for a hydrogen production system provided in one embodiment of the present application, such as Fig. 9 As shown, the control method of the hydrogen production system may include steps S401 to S404.

[0068] In step S401, energy storage information of a DC energy storage module is obtained.

[0069] The energy storage information of the DC energy storage module may indicate the amount of electricity stored in the DC energy storage module.

[0070] In step S402, when the energy storage information indicates that the stored power is less than the startup required power, the backup power module is controlled to generate power to charge the DC energy storage module so that the power stored in the DC energy storage module is greater than or equal to the startup required power.

[0071] The startup power requirement is the amount of power required to start the wind turbine generator set for hydrogen production. The energy storage information indicates that the stored power is less than the startup power requirement, which means that the power stored in the DC energy storage module cannot start the wind turbine generator set for hydrogen production. In order to enable the DC energy storage module to provide enough power to start the wind turbine generator set for hydrogen production, the backup power module is controlled to generate electric energy, which is transmitted to the rectifier, converted into DC power through the rectifier, and the DC power is used to charge the DC energy storage module. The energy storage information of the DC energy storage module can be obtained in real time to obtain the amount of power stored in the DC energy storage module in real time. When the electric energy stored in the DC energy storage module is greater than or equal to the startup power requirement, the DC energy storage module is controlled to provide startup power for the wind turbine generator set for hydrogen production, thereby starting the wind turbine generator set for hydrogen production.

[0072] In step S403, when the energy storage information indicates that the stored power is greater than or equal to the startup power requirement, the DC energy storage module is controlled to provide startup power for the hydrogen production wind turbine generator set.

[0073] The energy storage information indicates that the stored electricity is greater than or equal to the required starting electricity, which means that the electricity stored in the DC energy storage module is sufficient to start the wind turbine generator set for hydrogen production. The DC energy storage module can be directly controlled to discharge and provide starting power for the wind turbine generator set for hydrogen production.

[0074] In step S404, the wind turbine generator set for hydrogen production is controlled to start up to supply power to the hydrogen production equipment.

[0075] The wind turbine generator set for hydrogen production can be controlled to start up using the starting power provided by the DC energy storage module, thereby supplying power to the hydrogen production equipment. The hydrogen production equipment can produce hydrogen using the power output by the wind turbine generator set for hydrogen production.

[0076] In the embodiment of the present application, on the basis of the hydrogen production system being an off-grid hydrogen production system, the DC energy storage module and the backup power module in the wind turbine generator set for hydrogen production can be used to cooperate to achieve a black start of the wind turbine generator set for hydrogen production and meet the hydrogen production demand.

[0077] In some embodiments, after the wind turbine generator set for hydrogen production is started and the hydrogen production equipment is started and preheated, the power mismatch problem between the wind turbine generator set for hydrogen production and the hydrogen production equipment can be solved according to the power generation of the generator and the hydrogen production demand of the hydrogen production equipment. Fig.10 This is a flow chart of a control method for a hydrogen production system provided in another embodiment of the present application. Fig.10 and Fig. 9 The difference is that Fig.10 The control method of the hydrogen production system shown may further include steps S405 to S408.

[0078] In step S405, power information of the generator and hydrogen production demand information of the hydrogen production equipment are obtained.

[0079] The power information of the generator may indicate the power of the generator. The hydrogen production demand information of the hydrogen production equipment may indicate the hydrogen production demand of the hydrogen production equipment, and the hydrogen production demand may comprehensively consider the comprehensive demand for hydrogen production, hydrogen transportation and hydrogen use, that is, the hydrogen production demand information may include hydrogen production information, hydrogen transportation information and hydrogen use information.

[0080] In step S406, the power generation of the generator and the power demand of the hydrogen production load of the hydrogen production equipment are determined according to the power information and the hydrogen production demand information.

[0081] The power generation of the generator can be estimated based on the power information. The hydrogen production demand of the hydrogen production equipment can be estimated based on the hydrogen production demand information, so as to determine the hydrogen production load power demand based on the hydrogen production demand, and the hydrogen production load power demand includes the power required to produce the hydrogen required for hydrogen production.

[0082] In step S407, when the power generation is greater than the power demand of the hydrogen production load, at least part of the power output by the generator is used to charge the DC energy storage module.

[0083] The power generation is greater than the power demand of the hydrogen production load, which means that the power generation of the generator meets the hydrogen production demand and has surplus power, which can be used to charge the DC energy storage module. Specifically, the AC power output by the generator is converted into DC power by the rectifier in the hydrogen production power supply, and at least part of the DC power is input into the DC energy storage module to charge the DC energy storage module.

[0084] In step S408, when the power generation is less than the power demand of the hydrogen production load, the DC energy storage module is controlled to discharge so as to supply power to the hydrogen production equipment through the hydrogen production power supply.

[0085] The power generation is less than the power demand of the hydrogen production load, which means that the power generation of the generator cannot meet the hydrogen production demand of the hydrogen production equipment. The DC energy storage module can be controlled to discharge. The DC power output by the DC energy storage module is transmitted to the DC bus between the rectifier and the DC chopper in the hydrogen production power supply, and converted into DC power that meets the requirements of the hydrogen production equipment through the DC chopper, so as to supply power to the hydrogen production equipment and meet the hydrogen production demand of the hydrogen production equipment.

[0086] A fourth aspect of the present application provides a controller. Fig.11 A schematic diagram of the structure of a controller provided in an embodiment of the present application is shown in FIG. Fig.11 As shown, the controller 600 includes a memory 601 , a processor 602 , and a computer program stored in the memory 601 and executable on the processor 602 .

[0087] In some examples, the processor 602 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0088] The memory 601 may include a read-only memory (ROM), a random access memory (RAM), a disk storage medium device, an optical storage medium device, a flash memory device, an electrical, optical or other physical / tangible memory storage device. Therefore, generally, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., a memory device) encoded with software including computer executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the control method of the hydrogen production system in the embodiment of the present application.

[0089] The processor 602 runs a computer program corresponding to the executable program code by reading the executable program code stored in the memory 601 , so as to implement the control method of the hydrogen production system in the above embodiment.

[0090] In some examples, the controller 600 may further include a communication interface 603 and a bus 604. Fig.11 As shown, the memory 601, the processor 602, and the communication interface 603 are connected via a bus 604 and communicate with each other.

[0091] The communication interface 603 is mainly used to realize the communication between the modules, devices, units and / or equipment in the embodiment of the present application. The communication interface 603 can also be used to access input devices and / or output devices.

[0092] The bus 604 includes hardware, software, or both, coupling the components of the controller 600 to each other. By way of example and not limitation, the bus 604 may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hyper Transport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand interconnect, a Low Pin Count (LPC) bus, a Memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-E) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local Bus (VLB) bus, or other suitable buses or a combination of two or more of the above. Where appropriate, the bus 604 may include one or more buses. Although embodiments of the present application describe and illustrate a particular bus, the present application contemplates any suitable bus or interconnect.

[0093] The present application may also provide a computer-readable storage medium, on which a computer program instruction is stored. When the computer program instruction is executed by a processor, the control method of the hydrogen production system in the above embodiment can be implemented, and the same technical effect can be achieved. To avoid repetition, it is not repeated here. Among them, the above-mentioned computer-readable storage medium may include a non-transitory computer-readable storage medium, such as a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc., which is not limited here.

[0094] The present application may also provide a computer program product. When the instructions in the computer program product are executed by a processor of an electronic device, the electronic device executes the control method of the hydrogen production system in the above embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0095] It should be clear that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. For hydrogen production system embodiments, method embodiments, computer-readable storage medium embodiments, and computer program products, the relevant parts can refer to the description part of the embodiment of the wind turbine generator set for hydrogen production. The present application is not limited to the specific steps and structures described above and shown in the figures. Those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application. In addition, for the sake of brevity, a detailed description of the known technology is omitted here.

[0096] The above reference is according to the method of the embodiment of the present application, the flow chart of the device (system) and the computer program product and / or the block diagram described various aspects of the present application.It should be understood that each square box in the flow chart and / or the block diagram and the combination of each square box in the flow chart and / or the block diagram can be realized by computer program instructions.These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the realization of the function / action specified in one or more square boxes of the flow chart and / or the block diagram.Such a processor can be but is not limited to a general-purpose processor, a special-purpose processor, a special application processor or a field programmable logic circuit.It can also be understood that each square box in the block diagram and / or the flow chart and the combination of the square boxes in the block diagram and / or the flow chart can also be realized by the dedicated hardware that performs the specified function or action, or can be realized by the combination of dedicated hardware and computer instructions.

[0097] Those skilled in the art should understand that the above embodiments are exemplary rather than restrictive. Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Based on the study of the drawings, the specification and the claims, those skilled in the art should be able to understand and implement other variations of the disclosed embodiments. In the claims, the term "comprising" does not exclude other devices or steps; the quantifier "one" does not exclude multiple; the terms "first" and "second" are used to indicate names rather than to indicate any specific order. Any figure marks in the claims should not be understood as limiting the scope of protection. The functions of multiple parts appearing in the claims can be implemented by a single hardware or software module. The appearance of certain technical features in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A wind turbine generator set for hydrogen production, characterized in that: include: dynamo; a hydrogen production power supply, comprising an electrically connected rectifier and a DC chopper, the input of the rectifier being electrically connected to the output of the generator, and the output of the DC chopper being configured to be electrically connected to a hydrogen production device; A DC energy storage module, comprising an electrically connected DC converter and a battery unit, wherein the DC converter is electrically connected to a DC bus between the rectifier and the DC chopper; The backup power module is electrically connected to the output of the generator and is used to generate electric energy to charge the DC energy storage module through the rectifier when the electric energy stored in the DC energy storage module is insufficient to start the wind turbine generator set for hydrogen production.

2. The wind turbine generator set for hydrogen production according to claim 1, characterized in that: The DC converter is used to realize bidirectional conversion of electric energy between the DC bus and the battery unit.

3. The wind turbine generator set for hydrogen production according to claim 1, characterized in that: The DC converter comprises a first capacitor group, a bidirectional half-bridge buck-boost conversion unit and a second capacitor group which are electrically connected in sequence; The two ends of the first capacitor group and the first connection end and the second connection end of the bidirectional half-bridge buck-boost conversion unit are electrically connected to the DC bus, and the third connection end, the fourth connection end of the bidirectional half-bridge buck-boost conversion unit and the two ends of the second capacitor group are electrically connected to the battery unit.

4. The wind turbine generator set for hydrogen production according to claim 1, characterized in that: The DC converter comprises a third capacitor group, two bidirectional half-bridge buck-boost conversion units connected in series, and a fourth capacitor group, which are electrically connected in sequence. The third capacitor group comprises two first capacitor subgroups connected in series, and the fourth capacitor group comprises two second capacitor subgroups connected in series. The two ends of the third capacitor group and the first connection end of one of the bidirectional half-bridge buck-boost conversion units, and the second connection end of another of the bidirectional half-bridge buck-boost conversion units are electrically connected to the DC bus; the third connection end of one of the bidirectional half-bridge buck-boost conversion units, the fourth connection end of another of the bidirectional half-bridge buck-boost conversion units, and the two ends of the fourth capacitor group are electrically connected to the battery unit; one end of the two first capacitor sub-groups connected in series, the second connection end of one of the bidirectional half-bridge buck-boost conversion units, the first connection end of another of the bidirectional half-bridge buck-boost conversion units, the fourth connection end of one of the bidirectional half-bridge buck-boost conversion units, the third connection end of another of the bidirectional half-bridge buck-boost conversion units, and one end of the two second capacitor sub-groups connected in series are electrically connected.

5. The wind turbine generator set for hydrogen production according to claim 3 or 4, characterized in that: The bidirectional half-bridge buck-boost conversion unit includes a first switch tube, a second switch tube, a third switch tube, a fourth switch tube and a first inductor; The first connection end of the bidirectional half-bridge buck-boost conversion unit includes the first end of the first switch tube, the second connection end of the bidirectional half-bridge buck-boost conversion unit includes the second end of the second switch tube, and the second end of the first switch tube is electrically connected to the first end of the second switch tube. The third connection end of the bidirectional half-bridge buck-boost conversion unit includes the first end of the third switch tube, the fourth connection end of the bidirectional half-bridge buck-boost conversion unit includes the second end of the fourth switch tube, the second end of the third switch tube is electrically connected to the first end of the fourth switch tube, One end of the first inductor is electrically connected to the second end of the first switch tube and the first end of the second switch tube, and the other end of the first inductor is electrically connected to the second end of the third switch tube and the first end of the fourth switch tube.

6. The wind turbine generator set for hydrogen production according to claim 1, characterized in that: The DC chopper is used to convert the DC power output by the rectifier into DC power with a current accuracy less than or equal to a hydrogen production required accuracy threshold.

7. The wind turbine generator set for hydrogen production according to claim 1, characterized in that: The DC chopper includes N-phase reactors, where N is an integer greater than or equal to 2, and the currents passing through each phase reactor are staggered in phase.

8. The wind turbine generator set for hydrogen production according to claim 1, characterized in that: The DC chopper comprises N-phase chopper units, N is an integer greater than or equal to 2, a first connection end of each phase of the chopper unit is electrically connected to the first DC output end of the rectifier, a second connection end of each phase of the chopper unit is electrically connected to the second DC output end of the rectifier, and a third connection end of the N-phase chopper unit is electrically connected, and the output of the DC chopper comprises the second connection end and the third connection end of the chopper unit; The phases of the currents outputted from the third connection terminals of the N-phase chopping units are staggered.

9. The wind turbine generator set for hydrogen production according to claim 8, characterized in that: The chopper unit of each phase includes a first reactor, a fifth switch tube and a sixth switch tube; The first connection end of the chopping unit includes the first end of the fifth switching tube, the second end of the fifth switching tube is electrically connected to the first end of the sixth switching tube, the second connection end of the chopping unit includes the second end of the sixth switching tube, the first end of the first inductor is electrically connected to the second end of the fifth switching tube and the first end of the sixth switching tube, and the third connection end of the chopping unit includes the second end of the first inductor.

10. The wind turbine generator set for hydrogen production according to claim 9, characterized in that: The switch control signals of the chopper units of the N phases are staggered 360° / N. The switch tube control signal is used to control the on and off of the fifth switch tube and the on and off of the sixth switch tube.

11. The wind turbine generator set for hydrogen production according to claim 1, characterized in that: The rectifier comprises a three-phase AC filter, an AC-DC conversion unit and a fifth capacitor group which are electrically connected in sequence; The three-phase AC filter is electrically connected to the output of the generator, and the DC end of the AC-DC conversion unit and the fifth capacitor group are electrically connected to the DC chopper.

12. The wind turbine generator set for hydrogen production according to claim 1, characterized in that: The backup power module includes an electrically connected transformer and a power generation unit; The transformer is electrically connected to an output of the generator.

13. A hydrogen production system, characterized in that: include: A wind turbine generator set for hydrogen production as claimed in any one of claims 1 to 12; A hydrogen production device is electrically connected to the output of the DC chopper in the hydrogen production power supply of the wind turbine generator set for hydrogen production.

14. The hydrogen production system according to claim 13, characterized in that: The hydrogen production equipment includes hydrogen production electrolysis equipment and hydrogen storage equipment; The hydrogen production electrolysis equipment comprises an electrolytic cell, a hydrogen separation device, a hydrogen purification device and a hydrogen pressurizing device.

15. The hydrogen production system according to claim 13, characterized in that: Also included is a control subsystem, the control subsystem comprising: A wind power prediction device, used to obtain the power generation of the generator; A load prediction device, used to obtain the hydrogen production load demand power of the hydrogen production equipment; A wind farm hydrogen production energy management subsystem is connected to the wind power prediction device and the load prediction device in communication, and is used to obtain the power generation from the wind power prediction device and obtain the hydrogen production load demand power from the load prediction device; A hydrogen production power supply control subsystem is communicatively connected with the wind farm hydrogen production energy management subsystem, and is used to obtain the power generation and the power demand of the hydrogen production load from the wind farm hydrogen production energy management subsystem, and control the main control and pitch control subsystem, the DC energy storage control subsystem and the backup power control subsystem according to the power generation and the power demand of the hydrogen production load; The main control and pitch control subsystem is connected to the hydrogen production power supply control subsystem; The DC energy storage control subsystem is connected to the hydrogen production power supply control subsystem and is used to control the DC energy storage module under the control of the hydrogen production power supply control subsystem; The backup power control subsystem is connected to the hydrogen production power supply control subsystem and is used to control the backup power module under the control of the hydrogen production power supply control subsystem.

16. A control method for a hydrogen production system, characterized in that: Applied to the hydrogen production system according to any one of claims 13 to 15, the method comprises: Acquiring energy storage information of the DC energy storage module; When the energy storage information indicates that the stored power is less than the startup required power, control the backup power module to generate power to charge the DC energy storage module, so that the power stored in the DC energy storage module is greater than or equal to the startup required power; When the energy storage information indicates that the stored power is greater than or equal to the startup required power, controlling the DC energy storage module to provide startup power for the hydrogen production wind turbine generator set; The wind turbine generator set for hydrogen production is controlled to start and supply power to the hydrogen production equipment.

17. The method according to claim 16, characterized in that After controlling the wind turbine generator set to start and supplying power to the hydrogen production equipment, the method further includes: Acquiring power information of the generator and hydrogen production demand information of the hydrogen production equipment; Determine the power generation of the generator and the power demand of the hydrogen production load of the hydrogen production equipment according to the power information and the hydrogen production demand information; When the power generation is greater than the power demand of the hydrogen production load, at least part of the power output by the generator is used to charge the DC energy storage module; When the power generation is less than the power demand of the hydrogen production load, the DC energy storage module is controlled to discharge, so as to supply power to the hydrogen production equipment through the hydrogen production power supply.

18. A controller, characterized in that: include: a processor and a memory storing computer program instructions; When the processor executes the computer program instructions, the control method of the hydrogen production system according to claim 16 or 17 is implemented.

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