CN219893166U - Hydrogen production power conversion unit, hydrogen production power converter and wind power generation hydrogen production system - Google Patents

Abstract

The application discloses a hydrogen production power conversion unit, a hydrogen production power converter and a wind power generation hydrogen production system, and belongs to the field of wind power generation. The hydrogen production power conversion unit includes: the power assembly comprises a first shell, two target areas are arranged in the first shell, each target area comprises a first area and a second area, the first area is provided with a radiator, four IGBT modules, two diode device modules and two first switch device modules, and the second area is provided with a primary capacitor group, a primary inductor, an isolation transformer, a secondary inductor and a secondary capacitor; in each target area, the IGBT module and the primary capacitor bank which are connected in series are connected in parallel, the IGBT module which is connected in series is correspondingly and electrically connected with the diode device module, the diode device module is electrically connected with the primary capacitor bank, the IGBT module is electrically connected with the isolation transformer through the primary inductor, and the first switch device module is electrically connected with the isolation transformer. According to the embodiment of the application, the capacity expansion difficulty of the hydrogen production power converter can be reduced.

Description

Hydrogen production power conversion unit, hydrogen production power converter and wind power generation hydrogen production system

Technical Field

The application belongs to the field of wind power generation, and particularly relates to a hydrogen production power conversion unit, a hydrogen production power converter and a wind power generation hydrogen production system.

Background

With the increase of energy shortage, renewable energy sources become a field of great concern, and wind power generation is one of the most mature and scale-developed renewable energy technologies in the renewable energy field. However, wind energy has strong randomness and obvious intermittence, so that the output power of the wind generating set is continuously changed, and the independent grid connection of the wind generating set is not beneficial to the stability of a power grid. In order to stabilize the power grid, a method for producing hydrogen by utilizing redundant electric energy generated by a wind generating set is provided, so that the overall wind power absorption capacity of the wind generating system is improved.

In the process of transmitting electric energy to the hydrogen production equipment, the electric energy is required to be converted into electric energy matched with the requirement of the hydrogen production equipment by utilizing a power conversion circuit, but the power conversion circuit between the wind generating set and the hydrogen production equipment is a non-standardized complex circuit, and when a wind power generation hydrogen production system comprising the wind generating set and the hydrogen production equipment has capacity expansion requirement, the capacity expansion of the power conversion circuit is difficult.

Disclosure of Invention

The embodiment of the utility model provides a hydrogen production power conversion unit, a hydrogen production power converter and a wind power generation hydrogen production system, which can reduce the capacity expansion difficulty of the hydrogen production power converter comprising the hydrogen production power conversion unit.

In a first aspect, an embodiment of the present utility model provides a hydrogen-producing power conversion unit, including: the power assembly comprises a first shell, wherein two target areas distributed along a first direction are arranged in the first shell, each target area comprises a first area and a second area distributed along a second direction, the first area is provided with a radiator, four IGBT modules positioned on a radiating surface of the radiator, two diode device modules and two first switch device modules, the IGBT modules comprise more than two IGBT devices connected in series, the diode device modules comprise more than two clamping diodes connected in series, the first switch device modules comprise more than two first switch devices connected in series, and the second area is provided with a primary capacitor group, a primary inductor, an isolation transformer, a secondary inductor and a secondary capacitor; in each target area, two IGBT modules connected in series, two other IGBT modules connected in series and a primary capacitor bank are connected in parallel, each two IGBT modules connected in series are correspondingly and electrically connected with one diode device module, the two diode device modules are electrically connected with the primary capacitor bank, the IGBT modules are electrically connected with an isolation transformer through primary inductors, the two first switch device modules are connected in parallel, the first switch device modules are electrically connected with the isolation transformer, and the secondary capacitor is electrically connected with the first switch device modules through secondary inductors; any two IGBT modules connected in series in one target area are electrically connected with any two IGBT modules connected in series in the other target area, and the first switching device modules in the two target areas are electrically connected.

In a second aspect, an embodiment of the present application provides a hydrogen-producing power converter, including: n hydrogen production power conversion units of the first aspect, N being a positive integer; under the condition that N is more than 1, one direct current anode input port of the ith hydrogen production power conversion unit is electrically connected with one direct current anode input port of the (i+1) th hydrogen production power conversion unit, i is a positive integer smaller than N, or two direct current anode input ports and two direct current anode input ports of each hydrogen production power conversion unit are correspondingly connected in parallel; under the condition that N is more than 1, the two direct current positive electrode output ports and the two direct current negative electrode output ports of each hydrogen production power conversion unit are correspondingly connected in parallel.

In a third aspect, an embodiment of the present application provides a wind power generation hydrogen production system, including: a wind power generator set; the hydrogen production power converter of the second aspect is electrically connected with a direct current bus of the wind generating set; and the hydrogen production equipment is electrically connected with the hydrogen production power converter.

In an embodiment of the application, the hydrogen production power conversion unit can comprise a power assembly, wherein the power assembly comprises a first shell, two target areas distributed along a first direction are arranged in the first shell, and each target area comprises a first area and a second area distributed along a second direction. The first region is provided with a radiator, an IGBT module, a diode device module and a first switching device module, the IGBT module, the diode device module and the first switching device module are integrally arranged on a radiating surface of the radiator, and devices such as a primary capacitor bank, a primary inductor, an isolation transformer, a secondary inductor and a secondary capacitor are integrally arranged in the second region, so that the devices in the two target regions are compactly distributed in the first shell to form standard modularized units, the standard modularized units are convenient to produce, assemble and connect, when the wind power generation hydrogen production system has capacity expansion requirements, the capacity expansion can be realized by simply increasing the hydrogen production power conversion unit, and the capacity expansion difficulty of the hydrogen production power converter comprising the hydrogen production power conversion unit is reduced.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present application, the drawings that are needed to be used in the embodiments of the present application will be briefly described, and it is possible for a person skilled in the art to obtain other drawings according to these drawings without inventive effort.

FIG. 1 is a schematic diagram of the overall structure of a hydrogen generation power conversion unit at an angle in an embodiment of the application;

FIG. 2 is a schematic diagram of a partial structure of a hydrogen-producing power conversion unit at an angle in an embodiment of the application;

FIG. 3 is a schematic view of a partial structure of a hydrogen-producing power conversion unit at another angle in an embodiment of the application;

FIG. 4 is a schematic diagram of an example of port connections in a hydrogen-producing power conversion unit in accordance with an embodiment of the application;

FIG. 5 is a schematic diagram of another example of port connections in a hydrogen-producing power conversion unit in an embodiment of the application;

FIG. 6 is a schematic electrical topology of an example of a portion of devices in a hydrogen-producing power conversion unit located in a target area in accordance with an embodiment of the application;

FIG. 7 is a schematic electrical topology of an example of another portion of devices in a hydrogen-producing power conversion unit located in a target area in accordance with an embodiment of the application;

FIG. 8 is a schematic electrical topology of another example of another portion of devices in a hydrogen-producing power conversion unit located in a target area in accordance with an embodiment of the application;

FIG. 9 is a schematic electrical topology of an example of a portion of the components of a hydrogen-producing power conversion unit in accordance with an embodiment of the application;

FIG. 10 is a schematic electrical topology of an example of another portion of the components of a hydrogen-producing power conversion unit in accordance with an embodiment of the application;

FIG. 11 is an electrical schematic diagram of another example of a portion of the components of a hydrogen-producing power conversion unit in accordance with an embodiment of the application;

FIG. 12 is a schematic electrical topology of a portion of the components of a power distribution module in a hydrogen-producing power conversion unit in accordance with an embodiment of the present application;

FIG. 13 is a schematic electrical topology of another portion of the devices of the power distribution module in the hydrogen-producing power conversion unit in accordance with an embodiment of the present application;

FIG. 14 is a schematic diagram of a wind power generation hydrogen production system in accordance with an embodiment of the application.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail below with reference to the accompanying drawings and the detailed embodiments. It should be understood that the particular embodiments described herein are meant to be illustrative of the application only and not limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the application by showing examples of the application.

With the increase of energy shortage, renewable energy sources become a field of great concern, and wind power generation is one of the most mature and scale-developed renewable energy technologies in the renewable energy field. However, wind energy has strong randomness and obvious intermittence, so that the output power of the wind generating set is continuously changed, and the independent grid connection of the wind generating set is not beneficial to the stability of a power grid. In order to stabilize the power grid, a method for producing hydrogen by utilizing redundant electric energy generated by a wind generating set is provided, so that the overall wind power absorption capacity of the wind generating system is improved. In the process of transmitting electric energy to the hydrogen production equipment, the electric energy is required to be converted into electric energy matched with the requirement of the hydrogen production equipment by utilizing a power conversion circuit, but the power conversion circuit between the wind generating set and the hydrogen production equipment is a non-standardized complex circuit, and when a wind power generation hydrogen production system comprising the wind generating set and the hydrogen production equipment has capacity expansion requirement, the capacity expansion of the power conversion circuit is difficult.

The application provides a hydrogen production power conversion unit, a hydrogen production power converter and a wind power generation hydrogen production system, wherein the hydrogen production power conversion unit can comprise a power assembly, the power assembly comprises a first shell, and devices such as a radiator, an IGBT (insulated gate bipolar transistor) module, a diode device module, a first switching device module, a capacitor, an inductor, an isolation transformer and the like which are arranged in the first shell are distributed in the first shell according to a certain relation to form a standard modularized unit, so that the hydrogen production power converter comprising the hydrogen production power conversion unit is convenient to assemble, the capacity expansion of the hydrogen production power converter comprising the hydrogen production power conversion unit is easier, and the capacity expansion difficulty of the hydrogen production power converter comprising the hydrogen production power conversion unit is reduced.

The hydrogen production power conversion unit, the hydrogen production power converter and the wind power generation hydrogen production system provided by the application are respectively described below.

The first aspect of the application provides a hydrogen-producing power conversion unit. Fig. 1-5 illustrate the structure of a hydrogen-producing power conversion unit in an embodiment of the application, which may include a power assembly 20, as illustrated in fig. 1-5. The power assembly 20 may include a first housing 21 having two target areas A1 distributed along a first direction within the first housing 21, each target area including a first area a11 and a second area a12 distributed along a second direction. The first region is provided with a heat sink 22, four IGBT modules 23 located on the heat radiating surface of the heat sink 22, two diode device modules 24, and two first switching device modules 25. The second region is provided with a primary capacitor bank 26, a primary inductor, an isolation transformer T1, a secondary inductor L1 and a secondary capacitor C1. The first direction intersects the second direction, which in some examples is perpendicular to the second direction.

In some examples, the heat dissipating surface of the heat spreader 22 has a first sub-region and a second sub-region distributed along the second direction, as shown in fig. 2, with two diode device modules 24 and two first switching device modules 25 located in the first sub-region and arranged sequentially along the first direction; four IGBT modules 23 are located in the second sub-region and are arranged one after the other in the first direction. In some examples, the heat sink 22 may be a liquid-cooled heat sink, with the coolant in the heat sink 22 dissipating heat for the four IGBT modules 23, the two diode device modules 24, and the two first switching device modules 25 located on the heat dissipating surface.

The primary capacitor set 26, the primary inductor, the isolation transformer T1, the secondary inductor L1 and the secondary capacitor C1 are integrated in the second area a12 and are adjacently arranged. In some examples, the second region a12 may include a third sub-region and a fourth sub-region distributed along the second direction, as shown in fig. 2, the secondary inductance L1 and the secondary capacitance C1 may be located in the third sub-region, the primary capacitance group 26, the primary inductance, and the isolation transformer T1 may be located in the fourth sub-region, and the primary inductance may be integrally provided with the isolation transformer T1, and the isolation transformer T1 in fig. 2 to 5 is the isolation transformer T1 integrated with the primary inductance. The primary capacitor bank 26 may be integrated with a plurality of primary capacitors, which is not limited herein. The primary capacitor set 26, the primary inductor, the isolation transformer T1, the secondary inductor L1 and the secondary capacitor C1 are all passive power devices, and the primary capacitor set 26, the primary inductor, the isolation transformer T1, the secondary inductor L1 and the secondary capacitor C1 are arranged in a centralized manner, so that space can be saved, and power flow in the power assembly 20 is smoother.

In order to clearly show the distribution of the above-mentioned devices such as the heat sink 22, the IGBT module 23, the diode device module 24, the first switching device module 25, the primary capacitor bank 26, the primary inductor, the isolation transformer T1, the secondary inductor L1, and the secondary capacitor C1 in the hydrogen-producing power conversion unit, the electrical connection between the above-mentioned devices is not shown in fig. 2 to 5. The electrical connections between the above-described devices are described below.

The IGBT module 23 includes two or more IGBT devices connected in series. The diode device module 24 includes more than two clamp diodes in series. The first switching device module 25 includes two or more first switching devices connected in series.

The four IGBT modules 23 in each target area A1 may be divided into two groups, each group including two IGBT modules 23, and the two IGBT modules 23 in each group are connected in series. In each target area A1, two IGBT modules 23 connected in series, two other IGBT modules 23 connected in series, and a primary capacitor bank 26 are connected in parallel, each two IGBT modules 23 connected in series are electrically connected with one diode device module 24, and two diode device modules 24 are electrically connected with the primary capacitor bank 26. The IGBT module 23 is electrically connected to the isolation transformer T1 through a primary inductance, and the two first switching device modules 25 are connected in parallel.

In some examples, the first switching device may include a diode or an IGBT device, which is not limited herein. For convenience of explanation, the following describes the electrical connection of devices in one target area A1 in the hydrogen-producing power conversion unit with reference to fig. 6 to 8, taking the IGBT module 23 including two IGBT devices connected in series, the diode device module 24 including two clamp diodes connected in series, the first switching device module 25 including two first switching devices connected in series, and the primary capacitor group 26 including two primary capacitors connected in series as an example.

As shown in fig. 6, in the first group of two IGBT modules 23 connected in series, the first IGBT module 23 includes IGBT devices M1 and M2 connected in series, and the second IGBT module 23 includes IGBT devices M3 and M4 connected in series. Of the second series of two IGBT modules 23, the first IGBT module 23 includes IGBT devices M5 and M6 connected in series, and the second IGBT module 23 includes IGBT devices M7 and M8 connected in series. The first diode device module 24 includes clamp diodes F1 and F2 in series, and the second diode device module 24 includes clamp diodes F3 and F4 in series. The four IGBT modules 23 and the two diode device modules 24 form a three-level inverted full bridge. Each group of two IGBT modules 23 connected in series may be regarded as one bridge arm of the three-level inversion full bridge, and each IGBT module 23 in the bridge arm may be regarded as one half bridge. The IGBT module 23 includes an upper half-bridge device group including at least one IGBT device and an lower half-bridge device group including at least one IGBT device. As shown in fig. 6, the half-bridge upper device group in the IGBT module 23 includes one IGBT device, and the half-bridge lower device group in the IGBT module 23 includes one IGBT device. In the IGBT module 23 serving as the upper half bridge of the two IGBT modules 23 connected in series, the collector of the IGBT device of the half bridge upper device group is electrically connected to the primary positive bus, and the emitter of the IGBT device of the half bridge upper device group is electrically connected to the collector of the IGBT device of the half bridge lower device group. In the IGBT module 23 serving as the lower half bridge of the two IGBT modules 23 connected in series, the emitter of the IGBT device of the half bridge upper device group is electrically connected to the collector of the IGBT device of the half bridge lower device group, and the emitter of the IGBT device of the half bridge upper device group is electrically connected to the primary negative bus. Among the two IGBT modules 23 connected in series, the emitter of the IGBT device of the half-bridge lower device group in the IGBT module 23 of the upper half-bridge is electrically connected to the collector of the IGBT device of the half-bridge upper device group in the IGBT module 23 of the lower half-bridge. For example, as shown in fig. 6, the collector of the IGBT device M1 is electrically connected to the primary positive bus, the emitter of the IGBT device M1 is electrically connected to the collector of the IGBT device M2, the emitter of the IGBT device M2 is electrically connected to the collector of the IGBT device M3, the emitter of the IGBT device M3 is electrically connected to the collector of the IGBT device M4, and the emitter of the IGBT device M4 is electrically connected to the primary negative bus.

As shown in fig. 6, the first diode device module 24 includes clamp diodes F1 and F2 in series, and the second diode device module 24 includes clamp diodes F3 and F4 in series. In each diode device module 24, the cathode of one clamp diode is electrically connected to the emitter of the IGBT device in the half-bridge upper device group and the collector of the IGBT device in the half-bridge lower device group in the corresponding IGBT module 23 as the upper half-bridge, and the anode of the one clamp diode is electrically connected to the cathode of the other clamp diode and the anode of the other clamp diode is electrically connected to the emitter of the IGBT device in the half-bridge upper device group and the collector of the IGBT device in the half-bridge lower device group in the corresponding IGBT module 23 as the lower half-bridge. For example, as shown in fig. 6, the cathode of the clamp diode F1 is electrically connected to the emitter of the IGBT device M1 and the collector of the IGBT device M2, the anode of the clamp diode F1 is electrically connected to the cathode of the clamp diode F2, and the anode of the clamp diode F2 is electrically connected to the emitter of the IGBT device M3 and the collector of the IGBT device M4.

One end of the primary capacitor bank 26 is connected to a primary positive bus, and the other end of the primary capacitor bank 26 is electrically connected to a primary negative bus. As shown in fig. 6, the primary capacitor set 26 includes primary capacitors C2 and C3 connected in series, one end of the primary capacitor set 26 includes one end of the primary capacitor C2, one end of the primary capacitor C2 is electrically connected with the primary positive bus, the other end of the primary capacitor C2 is electrically connected with one end of the primary capacitor C3, the other end of the primary capacitor set 26 includes the other end of the primary capacitor C3, and the other end of the primary capacitor C3 is electrically connected with the primary negative bus. The other end of the primary side capacitor C2 and one end of the primary side capacitor C3 are also electrically connected with the anode of one clamping diode and the cathode of the other clamping diode in each diode device module. For example, as shown in fig. 6, the other end of the primary capacitor C2 and one end of the primary capacitor C3 are also electrically connected to the anode of the clamp diode F1, the cathode of the clamp diode F2, the anode of the clamp diode F3, and the cathode of the clamp diode F4.

The IGBT module 23 is electrically connected to the isolation transformer T1 through the primary inductance L2. The connection part of the IGBT module 23 serving as the upper half bridge and the IGBT module 23 serving as the lower half bridge in the group of two series-connected IGBT modules 23 may be electrically connected to one end of the primary inductor L2, and the other end of the primary inductor L2 is electrically connected to the first input port of the primary side of the isolation transformer T1. The connection of the IGBT module 23 as the upper half-bridge and the IGBT module 23 as the lower half-bridge in the other group of two series-connected IGBT modules 23 may be electrically connected to the second input port of the primary side of the isolation transformer T1. As shown in fig. 6, the emitter of the IGBT device M2 and the collector of the IGBT device M3 are electrically connected to one end of the primary inductor L2, and the emitter of the IGBT device M6 and the collector of the IGBT device M7 are electrically connected to the second input port on the primary side of the isolation transformer T1.

As shown in fig. 7, in each target area A1, two first switching device modules 25 are connected in parallel, the first switching device modules 25 are electrically connected to the isolation transformer T1, and the secondary capacitor C1 is electrically connected to the first switching device modules 25 through the secondary inductance L1.

The two first switching devices 25 connected in parallel may form a rectifying full-bridge structure. The first switching device module 25 includes diodes D1 and D2 connected in series, and the second first switching device module 25 includes diodes D3 and D4 connected in series. The diodes D1 to D4 may be high frequency diodes, and the diodes D1 to D4 may form a high frequency rectifying full bridge. The first switching device module 25 may be regarded as one bridge arm of the rectifying full-bridge structure, each bridge arm includes an upper bridge arm and a lower bridge arm, the upper bridge arm may include at least one first switching device, the lower bridge arm may include at least one first switching device, one end of the upper bridge arm is electrically connected with one end of the secondary side capacitor C1 through the secondary side inductor L1, and one end of the lower bridge arm is connected with the other end of the secondary side capacitor C1.

For example, as shown in fig. 7, the upper leg may include one diode and the second lower leg may include one diode. The anode of the diode of the upper bridge arm in each bridge arm is electrically connected with the cathode of the diode of the lower bridge arm in the bridge arm. The cathode of the diode of the upper bridge arm of each bridge arm may be electrically connected to the secondary side positive bus and the secondary side inductance L1, and the anode of the diode of the lower bridge arm of each bridge arm is electrically connected to the secondary side negative bus, so as to realize the parallel connection of the two first switching device modules 25. The first switching device module 25 is further electrically connected to the isolation transformer T1, the anode of the diode D1 and the cathode of the diode D2 are electrically connected to the first input terminal of the secondary side of the isolation transformer T1, and the anode of the diode D3 and the cathode of the diode D4 are electrically connected to the second input terminal of the secondary side of the isolation transformer T1.

Diodes D1 to D4 in fig. 7 may also be replaced with IGBT devices. For example, as shown in fig. 8, the diodes D1 to D4 in fig. 7 may be replaced by the IGBT devices D1 'to D4' in fig. 8, the emitter of the IGBT device of the upper arm of each first switching device module 25 is electrically connected to the collector of the IGBT device of the lower arm of the first switching device module 25, for example, the emitter of the IGBT device D1 'is electrically connected to the collector of the IGBT device D2', the emitter of the IGBT device D3 'is electrically connected to the collector of the IGBT device D4', the collector of the IGBT device D1 'and the collector of the IGBT device D3' are electrically connected to one end of the secondary inductor L1, the emitter of the IGBT device D2 'and the emitter of the IGBT device D4' are electrically connected to one end of the secondary capacitor C1 through the secondary inductor L1. The first switching device is an IGBT device, so that the output voltage, namely the current value, of the hydrogen production power conversion unit can be better controlled, and the hydrogen production power conversion unit can be controlled more flexibly.

Any two IGBT modules 23 connected in series in one target area A1 in the above embodiment are electrically connected to any two IGBT modules 23 connected in series in the other target area A1. In some examples, any two IGBT modules 23 connected in series in one target area A1 are connected in parallel with any two IGBT modules 23 connected in series in another target area A1. In other examples, any two IGBT modules 23 connected in series in one target area A1 are connected in series with any two IGBT modules 23 connected in series in another target area A1.

The first switching device modules 25 in the two target areas A1 are electrically connected. In some examples, the first switching device modules 25 in the two target areas A1 are connected in parallel.

In an embodiment of the present application, the hydrogen-producing power conversion unit may include a power assembly 20, where the power assembly 20 includes a first housing 21 having two target areas A1 distributed along a first direction therein, and each target area A1 includes a first area a11 and a second area a12 distributed along a second direction. The first area A11 is provided with a radiator 22, an IGBT module 23, a diode device module 24 and a first switch device module 25, the IGBT module 23, the diode device module 24 and the first switch device module 25 are integrally arranged on the radiating surface of the radiator 22, and the primary capacitor bank 26, the primary inductor L2, the isolation transformer T1, the secondary inductor L1, the secondary capacitor C1 and other devices are integrally arranged on the second area A12, so that the devices in the two target areas A1 are compactly distributed in the first shell 21 to form a standard modularized unit, the production, the assembly and the connection are convenient, when the wind power generation hydrogen production system has the capacity expansion requirement, the capacity expansion can be realized by simply increasing the hydrogen production power conversion unit, and the capacity expansion difficulty of the hydrogen production power converter comprising the hydrogen production power conversion unit is reduced.

The electric topology connection among the devices and the use of the IGBT devices in the IGBT module 23 can adopt a high-frequency conversion technology, on the basis of adopting a hydrogen production power conversion unit with a simpler structure, the harmonic wave and the current ripple of the electric energy converted by the hydrogen production power conversion unit are reduced, the quality of the electric energy converted by the hydrogen production power conversion unit is improved, the improvement of the electric energy quality can also reduce the adverse effect of larger harmonic wave and larger current ripple on hydrogen production equipment for producing hydrogen by using the electric energy, and the service life of the hydrogen production equipment is prolonged. In addition, in the embodiment of the application, the IGBT module 23, the diode device module 24 and the IGBT device in the first switch device module 25 adopt a high-frequency conversion technology, so that the adjustment speed of the hydrogen production power conversion unit is higher, and the device is more suitable for the scene that the intermittent and fluctuation of wind energy needs quick response.

As shown in fig. 2-5, the power assembly 20 may further include an IGBT drive board 27, the IGBT drive board 27 for driving the IGBT module 23. The IGBT driving boards 27 may be disposed in one-to-one correspondence with the IGBT modules 23, so as to facilitate driving the corresponding IGBT modules 23. The IGBT driving board 27 and the IGBT module 23 may be stacked and positioned on a side of the IGBT module 23 away from the heat sink 22.

In the above embodiment, the IGBT module includes an upper half-bridge device group including at least one IGBT device and an lower half-bridge device group including at least one IGBT device. For example, as shown in fig. 6, the half-bridge upper device group of the IGBT module 23 includes one IGBT device, and the half-bridge lower device group of the IGBT module 23 includes one IGBT device.

As shown in fig. 3 to 5, two dc positive input ports 211 and two dc negative input ports 212 are provided on the first side wall of the first housing 21. In each target area, one end of the half-bridge upper device group of one IGBT module 23 of the two series-connected IGBT modules 23, the half-bridge upper device group of one IGBT module 23 of the other two series-connected IGBT modules 23, and the primary side capacitor group 26 is electrically connected to the corresponding one of the dc positive input ports 211, and the half-bridge lower device group of the other IGBT module 23 of the two series-connected IGBT modules 23, and the half-bridge lower device group of the other one IGBT module 23 of the other two series-connected IGBT modules 23, and the other end of the primary side capacitor group 26 are electrically connected to the corresponding one of the dc negative input ports 212. As can be obtained in conjunction with fig. 6, the collector of the IGBT device M1, the collector of the IGBT device M5, and one end of the primary side capacitor C2 in each target area A1 are electrically connected to the corresponding dc positive input port 211, and the emitter of the IGBT device M4, the emitter of the IGBT device M8, and the other end of the primary side capacitor C3 in each target area A1 are electrically connected to the corresponding dc negative input port 212.

The first switching device module 25 in the above embodiment includes an upper leg including at least one first switching device and a lower leg including at least one first switching device. One end of the upper bridge arm is electrically connected with one end of the secondary side capacitor C1 through the secondary side inductor L1, and one end of the lower bridge arm is connected with the other end of the secondary side capacitor C1.

As shown in fig. 3 to 5, two dc positive output ports 213 and two dc negative output ports 214 are provided on the first side wall of the first housing 21. In each target area A1, one end of the secondary inductor L1 and one end of the secondary capacitor C1 are electrically connected to a corresponding one of the dc positive output ports 213, and one end of the lower bridge arm and the other end of the secondary capacitor C1 are electrically connected to a corresponding one of the dc negative output ports 214. As can be obtained in conjunction with fig. 7, the other end of the secondary inductor L1 and one end of the secondary capacitor C1 in each target area A1 are electrically connected to the corresponding dc positive output port 213, and the anode of the diode D2, the anode of the diode D4 and the other end of the secondary capacitor C1 in each target area A1 are electrically connected to the corresponding dc negative output port 214. As can be obtained in conjunction with fig. 8, the other end of the secondary inductor L1 and one end of the secondary capacitor C1 in each target area A1 are electrically connected to the corresponding dc positive output port 213, and the collector of the IGBT device D2 'and the collector of the IGBT device D4' in each target area A1 and the other end of the secondary capacitor C1 are electrically connected to the corresponding dc negative output port 214.

As shown in fig. 3 to 5, two sets of openings may be further provided on the first side wall of the first housing 21, each set of openings including a first opening and a second opening. One set of openings corresponds to the heat sink 22 in one target area A1. Radiator 22 may have a liquid inlet 215 and a liquid outlet 216, with liquid inlet 215 extending from the first opening and liquid outlet 216 extending from the second opening. The liquid inlet 215 and the liquid outlet 216 may be further connected to a liquid inlet pipe and a liquid outlet pipe, so as to realize the circulation of the cooling liquid in the radiator 22. Along the first direction, the liquid inlet 215 corresponding to one target area A1, the liquid outlet 216 corresponding to the one target area A1, the direct current negative electrode input port 212 corresponding to the one target area A1, the direct current positive electrode input port 211 corresponding to the one target area A1, the direct current negative electrode output port 214 corresponding to the one target area A1, the direct current positive electrode output port 213 corresponding to the one target area A1, the liquid inlet 215 corresponding to the other target area A1, the liquid outlet 216 corresponding to the other target area A1, the direct current negative electrode input port 212 corresponding to the other target area A1, the direct current positive electrode input port 211 corresponding to the other target area A1, the direct current negative electrode output port 214 corresponding to the other target area A1, and the direct current positive electrode output port 213 corresponding to the other target area A1 are sequentially arranged.

The direct current positive electrode input port 211, the direct current negative electrode input port 212, the direct current positive electrode output port 213 and the direct current negative electrode output port 214 are arranged on the same side wall of the first shell 21, so that electric connection among the direct current positive electrode input port 211, the direct current negative electrode input port 212, the direct current positive electrode output port 213 and the direct current negative electrode output port 214 corresponding to different target areas A1 is facilitated, and electric connection among different hydrogen production power conversion units is also facilitated.

The electric connection modes between the input ports and the output ports corresponding to different target areas A1 are also flexible.

In some embodiments, input ports corresponding to two target areas A1 in the same hydrogen production power conversion unit may be connected in series, and output ports corresponding to two target areas A1 in the same hydrogen production power conversion unit may be connected in parallel. Referring to fig. 4, a dc negative input port 212 corresponding to one target area A1 is connected in series with a dc positive input port 211 corresponding to another target area A1, and a dc positive output port 213 and a dc negative output port 214 corresponding to one target area A1 are connected in parallel with a dc positive output port 213 and a dc negative output port 214 corresponding to another target area A1.

Similarly, the electrical topology of the serial connection of the input ports corresponding to the two target areas A1 in the same hydrogen-producing power conversion unit can be seen in fig. 9, and the other end of the primary side capacitor C3 in one target area A1, the emitter of the IGBT device M4, and the emitter of the IGBT device M8 are electrically connected with one end of the primary side capacitor C2 in the other target area A1, the collector of the IGBT device M1, and the collector of the IGBT device M5. The input ports corresponding to different target areas are connected in series and the output ports are connected in parallel, so that the input voltage level of the hydrogen production power conversion unit can be improved, and the requirement of wide-range voltage is met.

The electrical topology of the parallel connection of the output ports corresponding to the two target areas A1 in the same hydrogen production power conversion unit can be seen in fig. 10, wherein the other end of the secondary side capacitor L1 in one target area A1 and one end of the secondary side capacitor C1 are electrically connected with the other end of the secondary side capacitor L1 and one end of the secondary side capacitor C1 in the other target area A1, and the anode of the diode D2, the anode of the diode D4 and the other end of the secondary side capacitor C1 in one target area A1 are electrically connected with the anode of the diode D2, the anode of the diode D4 and the other end of the secondary side capacitor C1 in the other target area A1.

In other embodiments, input ports corresponding to two target areas A1 in the same hydrogen production power conversion unit may be connected in parallel, and output ports corresponding to two target areas A1 in the same hydrogen production power conversion unit may be connected in parallel. Referring to fig. 5, the dc positive input port 211 and the dc negative input port 212 corresponding to one target area A1 are connected in parallel with the dc positive input port 211 and the dc negative input port 212 corresponding to the other target area A1, and the dc positive output port 213 and the dc negative output port 214 corresponding to the one target area A1 are connected in parallel with the dc positive output port 213 and the dc negative output port 214 corresponding to the other target area A1.

Similarly, the electrical topology of the parallel connection of the input ports corresponding to the two target areas A1 in the same hydrogen-producing power conversion unit may be seen in fig. 11, where one end of the primary side capacitor C2 in one target area A1, the collector of the IGBT device M5 are electrically connected to one end of the primary side capacitor C2 in the other target area A1, the collector of the IGBT device M1, and the collector of the IGBT device M5, and the other end of the primary side capacitor C3 in one target area A1, the emitter of the IGBT device M4, and the emitter of the IGBT device M8 are electrically connected to the other end of the primary side capacitor C3 in the other target area A1, the emitter of the IGBT device M4, and the emitter of the IGBT device M8.

The electrical topology of the parallel connection of the output ports corresponding to the two target areas A1 in the same hydrogen-producing power conversion unit can be seen in fig. 10, and will not be described herein.

In some embodiments, one or more of a primary side current sensor, a voltage detection module, a discharge resistor, a secondary side current sensor, an output switch assembly, etc., may also be provided in the power assembly 20. As shown in fig. 2, the power assembly 20 may further include a power distribution module 28, and the power distribution module 28 may be disposed on the first housing 21 proximate to the diode device module 24 and the inner sidewall of the first switching device module 25. The power distribution module 28 may include, but is not limited to, one or more of the following: primary side current sensor, voltage detection module, discharge resistor, secondary side current sensor, output switch subassembly.

For ease of illustration, the electrical connections of the devices in the power distribution module 28 to other devices in the power assembly 20 are illustrated by electrical topology connections.

Referring to fig. 3, 4, 5 and 12, in each target area A1, one end of the half-bridge device group of one IGBT module 23 of the two series-connected IGBT modules 23, the half-bridge device group of one IGBT module 23 of the other two series-connected IGBT modules 23, and the primary capacitor group 26 is electrically connected to the corresponding one dc positive input port 211 through the primary current sensor 281, and the voltage detection module 282 is electrically connected to the half-bridge device group of one IGBT module 23 of the two series-connected IGBT modules 23, and the half-bridge device group of the other IGBT module 23 of the two series-connected IGBT modules 23. That is, the IGBT module 23 as the upper half-bridge may be electrically connected to the dc positive input port 211 via the voltage detection module 282 and the primary current sensor 281, and the IGBT module 23 as the lower half-bridge may be electrically connected to the dc negative input port 212 via the voltage detection module 282. Primary side current sensor 282 may be used to collect current from the DC input of the hydrogen-producing power conversion unit, and in some examples, primary side current sensor 282 may include a current Hall element. The voltage detection module 281 may be configured to collect the voltage of the primary dc bus.

Referring to fig. 3, 4, 5 and 13, in each target area A1, the discharge resistor R1 is connected in parallel with the secondary capacitor C1, the first output terminal of the first switching device module 25 is electrically connected to a corresponding one of the dc positive output ports 213 through the secondary inductor L1, the secondary current sensor 283, and the output switch assembly 284, and the second output terminal of the first switching device module 25 is electrically connected to a corresponding one of the dc negative output ports 214 through the output switch assembly 284. Secondary side current sensor 283 may be used to collect the current of the input of the hydrogen-producing power conversion unit, in some examples, secondary side current sensor 283 may include a current hall element. The output switch assembly 284 is used to control the on-off of the output of the hydrogen-producing power conversion unit.

The power distribution module 28 integrates the devices for controlling the on-off of the output and the detection devices, is convenient for manufacturing and maintenance, and can further save space of the power assembly 20.

In some embodiments, the hydrogen-producing power conversion unit may also include a control component for controlling power component 20. As shown in fig. 1-5, the hydrogen-producing power conversion unit may also include a control assembly 30. The control assembly 30 is removably coupled to the power assembly 20 to facilitate separate maintenance of the power assembly 20 and the control assembly 30.

The control assembly 30 includes a second housing 31, a primary side control circuit board 32, a secondary side control circuit board 33, and a switching power supply 34 within the second housing 31.

The primary control circuit board 32 may be used to control devices of the power assembly 20 that are electrically topologically located on the primary side of the isolation transformer T1, and may also obtain parameters of devices of the power assembly that are electrically topologically located on the primary side of the isolation transformer T1, so as to facilitate control. The devices whose electrical topology is located on the primary side of the isolation transformer T1 may include, but are not limited to, IGBT devices, clamp diodes, devices of the distribution module 28 that are located on the primary side of the isolation transformer T1, and the like. As shown in fig. 12, the primary control circuit board 32 may acquire current data acquired by the primary current sensor 281, voltage data acquired by the voltage detection module 282, and the like, and may control the hydrogen production power conversion unit according to the acquired data, signals, and the like. Primary side control circuit board 32 may also be communicatively coupled to and in communication with the control system of the hydrogen generation power conversion unit.

The secondary control circuit board 33 may be used to control devices in the power assembly 20 that are electrically topologically located on the secondary side of the isolation transformer T1, and may also obtain parameters of devices that are electrically topologically located on the secondary side of the isolation transformer T1, so as to facilitate control. The devices of the electrical topology on the secondary side of the isolation transformer T1 may include, but are not limited to, the first switching device, the devices of the distribution module 28 disposed on the secondary side of the isolation transformer T1, and the like. As shown in fig. 13, the secondary side control circuit board 33 may acquire current data or the like acquired by the secondary side current sensor 283, and may control the hydrogen production power conversion unit according to the acquired data or the like. The secondary control circuit board 33 may be communicatively coupled to the primary control circuit board 32 to enable data communication interactions. The communication connection between the secondary control circuit board 33 and the primary control circuit board 32 may be a wired connection or a wireless connection, for example, the secondary control circuit board 33 and the primary control circuit board 32 may be connected by optical fibers.

The switching power supply 34 may be electrically connected to the primary control circuit board 32 and the secondary control circuit board 33 to supply power to the primary control circuit board 32 and the secondary control circuit board 33. The switching power supply 34 may generate two isolated power supplies, one supplying power to the primary control circuit board 32 and the other supplying power to the secondary control circuit board 33.

In a hydrogen generation power conversion unit, two target areas A1 may be commonly configured with a primary side control circuit board 32 and a secondary side control circuit board 33, and two target areas A1 may be configured with a primary side control circuit board 32 and a secondary side control circuit board 33, which are not limited herein.

The primary control circuit board 32 and the secondary control circuit board 33 are stacked, and the primary control circuit board 32 or the secondary control circuit board 33 is located on a side wall of the second housing 31, which is attached to the first housing 21. For example, as shown in fig. 2, the secondary side control circuit board 33 is located on a side wall of the second housing 31 to which the first housing 21 is attached. The switching power supply 34 is located on a side wall of the second housing 31, which is attached to the first housing 21, and is electrically connected to the primary side control circuit board 32 and the secondary side control circuit board 33, so as to supply power to the primary side control circuit board 32 and the secondary side control circuit board 33. The primary control circuit board 32, the secondary control circuit board 33 and the switching power supply 34 are integrated in the second housing 31, so that the control assembly 30 can also achieve standard modularization.

A second aspect of the application includes a hydrogen-producing power converter. The hydrogen production power converter comprises N hydrogen production power conversion units in the above embodiments, wherein N is a positive integer. N may be 1 or an integer greater than 1.

Under the condition that N is more than 1, the direct current input ports of the plurality of hydrogen production power conversion units are connected in series, and the direct current output ports of the plurality of hydrogen production power conversion units are connected in parallel. Specifically, one dc negative input port 212 of the ith hydrogen production power conversion unit is electrically connected to one dc positive input port 211 of the (i+1) th hydrogen production power conversion unit, and two dc positive output ports 213 and two dc negative output ports 214 of each hydrogen production power conversion unit are correspondingly connected in parallel, where i is a positive integer less than N. The connection of the dc positive input port, the dc negative input port, the dc positive output port, and the dc negative output port of each hydrogen production power conversion unit may be referred to fig. 4 and the related description in the foregoing embodiments, and will not be described herein. The parallel connection of the dc positive output port 213 and the dc negative output port 214 may be connected by a dc bus assembly, which may include a dc bus.

Under the condition that N is more than 1, the direct current input ports of the plurality of hydrogen production power conversion units are connected in parallel, and the direct current output ports of the plurality of hydrogen production power conversion units are connected in parallel. Specifically, the two direct current positive electrode input ports 211 and the two direct current negative electrode input ports 212 of each hydrogen production power conversion unit are correspondingly connected in parallel, and the two direct current positive electrode output ports 213 and the two direct current negative electrode output ports 214 of each hydrogen production power conversion unit are correspondingly connected in parallel. The parallel connection of the dc positive input port 211 and the dc negative input port 212 may be connected by a dc bus assembly, and the parallel connection of the dc positive output port 213 and the dc negative output port 214 may be connected by another dc bus assembly.

In the embodiment of the application, the hydrogen production power conversion unit is a standard modularized unit, and the hydrogen production power conversion unit can be added or reduced according to the requirements in the hydrogen production power converter, so that the hydrogen production power converter can adapt to various power grades, is convenient for capacity expansion and maintenance, is centralized, and is convenient for management. The configuration of the input port of the hydrogen production power converter is flexible, and the hydrogen production power converter can cover a plurality of application scenes without configuring special power conversion equipment for new energy power energy of direct current input.

A third aspect of the application provides a wind power generation hydrogen production system, as shown in fig. 14, which may include a wind power generator set 51, hydrogen production power converter 40 and hydrogen production apparatus 52 in the above embodiments.

The wind power generator set 51 may output electric power. Wind turbine 51 may include a main pitch system 511, an ac-dc rectifier 512, and a dc-ac inverter 513, with the output of ac-dc rectifier 512 and the input of dc-ac inverter 513 being connectable by dc bus. Both ac-dc rectifier 512 and dc-ac inverter 513 are three-level structures.

The hydrogen-producing power converter 40 is electrically connected to a dc bus of the wind turbine 51. The hydrogen-producing power converter 40 includes a plurality of hydrogen-producing power conversion units in the above embodiment, and the hydrogen-producing power conversion units are three-level hydrogen-producing power conversion units, and the hydrogen-producing power converter 40 including three-level hydrogen-producing power conversion units may be used in combination with the three-level ac-dc rectifier 512 and the three-level dc-ac inverter 513.

Hydrogen plant 52 is electrically connected to hydrogen-producing power converter 40. Hydrogen plant 52 may utilize the electrical energy converted by hydrogen power converter 40 to produce hydrogen. Hydrogen plant 52 may include a hydrogen production electrolyzer 521 and a hydrogen storage device 522. Hydrogen production electrolyzer 521 may store the produced hydrogen gas into hydrogen storage device 522.

The output of the wind generating set 51 may also be electrically connected to the power grid 60, and the electrical energy output by the wind generating set 51 may also be transmitted to the power grid 60. In some examples, a first transformer 53 may also be included between the power grid 60 and the wind turbine 51, and is not limited herein.

The specific content of the wind power generation hydrogen production system can be referred to the related content of the hydrogen production power conversion unit and the hydrogen production power converter in the above embodiment, and the same technical effects can be achieved, so that repetition is avoided, and the detailed description is omitted.

It should be understood that, in the present specification, each embodiment is described in an incremental manner, and the same or similar parts between the embodiments are all referred to each other, and each embodiment is mainly described in a different point from other embodiments. For wind power generation hydrogen production system embodiments, hydrogen production power converter embodiments, the relevant points may be found in the description of hydrogen production power conversion unit embodiments. The application is not limited to the specific constructions described above and shown in the drawings. Various changes, modifications and additions may be made by those skilled in the art after appreciating the spirit of the present application. Also, a detailed description of known techniques is omitted herein for the sake of brevity.

Those skilled in the art will appreciate that the above-described embodiments are exemplary and not limiting. The different technical features presented in the different embodiments may be combined to advantage. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art in view of the drawings, the description, and the claims. In the claims, the term "comprising" does not exclude other means or steps; the word "a" does not exclude a plurality; the terms "first," "second," and the like, are used for designating a name and not for indicating any particular order. Any reference signs in the claims shall not be construed as limiting the scope. The functions of the various elements presented in the claims may be implemented by means of a single hardware or software module. The presence of certain features in different dependent claims does not imply that these features cannot be combined to advantage.

Claims (10)

1. A hydrogen-producing power conversion unit, comprising:

the power assembly comprises a first shell, wherein two target areas distributed along a first direction are arranged in the first shell, each target area comprises a first area and a second area distributed along a second direction, the first area is provided with a radiator, four IGBT modules positioned on a radiating surface of the radiator, two diode device modules and two first switch device modules, the IGBT modules comprise more than two IGBT devices connected in series, the diode device modules comprise more than two clamping diodes connected in series, the first switch device modules comprise more than two first switch devices connected in series, and the second area is provided with a primary capacitor group, a primary inductor, an isolation transformer, a secondary inductor and a secondary capacitor;

In each target area, two IGBT modules connected in series, the other two IGBT modules connected in series and a primary capacitor bank are connected in parallel, each two IGBT modules connected in series are correspondingly and electrically connected with one diode device module, two diode device modules are electrically connected with the primary capacitor bank, the IGBT modules are electrically connected with the isolation transformer through the primary inductor, two first switch device modules are connected in parallel, the first switch device modules are electrically connected with the isolation transformer, and the secondary capacitor is electrically connected with the first switch device modules through the secondary inductor;

any two IGBT modules connected in series in one target area are electrically connected with any two IGBT modules connected in series in the other target area, and the first switching device modules in the two target areas are electrically connected.

2. The hydrogen-producing power conversion unit according to claim 1, wherein the heat dissipation surface has a first sub-region and a second sub-region distributed along the second direction,

two of the diode device modules and two of the first switching device modules are located in the first sub-region and are arranged one after the other in the first direction,

Four IGBT modules are located in the second subarea and are arranged in sequence along the first direction.

3. The hydrogen-producing power conversion unit according to claim 1, wherein,

the IGBT module comprises a half-bridge upper device group and a half-bridge lower device group, wherein the half-bridge upper device group comprises at least one IGBT device, and the half-bridge lower device group comprises at least one IGBT device;

two direct current positive electrode input ports and two direct current negative electrode input ports are arranged on the first side wall of the first shell,

in each target area, one end of the half-bridge upper device group of one IGBT module of the two IGBT modules connected in series, the half-bridge upper device group of one IGBT module of the other two IGBT modules connected in series, and one end of the primary side capacitor group are electrically connected with a corresponding direct current positive electrode input port, and the half-bridge lower device group of the other IGBT module of the two IGBT modules connected in series, and the other end of the half-bridge lower device group of the other two IGBT modules connected in series, and the other end of the primary side capacitor group are electrically connected with a corresponding direct current negative electrode input port.

4. A hydrogen-producing power conversion unit according to claim 3,

the first switching device module comprises an upper bridge arm and a lower bridge arm, the upper bridge arm comprises at least one first switching device, the lower bridge arm comprises at least one first switching device, one end of the upper bridge arm is electrically connected with one end of the secondary side capacitor through the secondary side inductor, and one end of the lower bridge arm is connected with the other end of the secondary side capacitor;

two direct current positive electrode output ports and two direct current negative electrode output ports are arranged on the first side wall of the first shell,

in each target area, one end of the secondary side inductor and one end of the secondary side capacitor are electrically connected with a corresponding direct current positive output port, and one end of the lower bridge arm and the other end of the secondary side capacitor are electrically connected with a corresponding direct current negative output port.

5. The hydrogen-producing power conversion unit according to claim 4, wherein,

the direct current negative electrode input port corresponding to one target area is connected with the direct current positive electrode input port corresponding to the other target area in series, or the direct current positive electrode input port and the direct current negative electrode input port corresponding to one target area are connected with the direct current positive electrode input port and the direct current negative electrode input port corresponding to the other target area in parallel;

And the direct current positive electrode output port and the direct current negative electrode output port corresponding to one target area are connected in parallel with the direct current positive electrode output port and the direct current negative electrode output port corresponding to the other target area.

6. The hydrogen-producing power conversion unit according to claim 1, wherein the power assembly further comprises an IGBT drive board,

the IGBT driving plates are arranged in one-to-one correspondence with the IGBT modules, are arranged in a stacked mode, and are located on one side, away from the radiator, of the IGBT modules.

7. The hydrogen-producing power conversion unit of claim 4, wherein the power assembly further comprises:

the power distribution module is arranged on the inner side wall of the first shell, which is close to the first switching device module, and comprises one or more than two of the following components: a primary side current sensor, a voltage detection module, a discharge resistor, a secondary side current sensor and an output switch assembly,

in each target area, one end of the half-bridge upper device group of one IGBT module of the two IGBT modules connected in series and one end of the half-bridge upper device group of the other two IGBT modules connected in series are electrically connected with a corresponding direct current positive input port through the primary side current sensor, the voltage detection module is electrically connected with the half-bridge upper device group of the one IGBT module of the two IGBT modules connected in series and the half-bridge lower device group of the other IGBT module of the two IGBT modules connected in series, the discharge resistor is connected with the secondary side capacitor in parallel, a first output end of the first switch device module is electrically connected with a corresponding direct current positive output port through the secondary side inductor, the secondary side current sensor and the output switch assembly, and a second output end of the first switch device module is electrically connected with a corresponding direct current negative output port through the output switch assembly.

8. The hydrogen-producing power conversion unit of claim 1, further comprising:

the control assembly is detachably connected with the power assembly and comprises a second shell, a primary side control circuit board, a secondary side control circuit board and a switching power supply, wherein the primary side control circuit board, the secondary side control circuit board and the switching power supply are positioned in the second shell;

the primary side control circuit board and the secondary side control circuit board are arranged in a stacked mode, the primary side control circuit board or the secondary side control circuit board is located on the side wall of the second shell, which is attached to the first shell, the switching power supply is located on the side wall of the second shell, which is attached to the first shell, and is electrically connected with the primary side control circuit board and the secondary side control circuit board.

9. A hydrogen-producing power converter, comprising:

n hydrogen production power conversion units as defined in any one of claims 1 to 8, N being a positive integer;

under the condition that N is more than 1, one direct current negative electrode input port of the ith hydrogen production power conversion unit is electrically connected with one direct current positive electrode input port of the (i+1) th hydrogen production power conversion unit, i is a positive integer smaller than N, or two direct current positive electrode input ports and two direct current negative electrode input ports of each hydrogen production power conversion unit are correspondingly connected in parallel;

And under the condition that N is more than 1, the two direct current positive electrode output ports and the two direct current negative electrode output ports of each hydrogen production power conversion unit are correspondingly connected in parallel.

10. A wind power generation hydrogen production system, comprising:

a wind power generator set;

the hydrogen-producing power converter of claim 9, electrically connected to a dc bus of the wind turbine;

and the hydrogen production equipment is electrically connected with the hydrogen production power converter.