Skid-mounted full-control high-power hydrogen production power supply

Abstract

The invention discloses a skid-mounted full-control high-power hydrogen production power supply, which belongs to the technical field of hydrogen production power supplies, and is characterized in that key components such as a water cooling device, a control device, a high-voltage switch device, a starting device, a transformer and a power supply conversion device are all arranged in a container body through an integrated design and are arranged in a skid-mounted manner; the compactness and modularization of the system are realized; according to the layout, space utilization is optimized, the occupied area is reduced, rapid installation, transportation and maintenance are facilitated, and the flexibility and transportability of the whole equipment are improved; meanwhile, all key components are integrated in a closed and controllable environment, so that the safety and the stability of the system are effectively improved, and particularly, the system can still operate efficiently under the outdoor severe environment condition, so that the high efficiency and the reliability of the hydrogen production process are ensured; the method is of great significance in promoting green energy application and hydrogen energy industry development.

Description

Technical Field

[0001] The invention belongs to the technical field of hydrogen production power supplies, and in particular relates to a skid-mounted fully-controlled high-power hydrogen production power supply. Background Art

[0002] Hydrogen energy is a secondary energy source with abundant sources, green and low carbon, and wide applications. It can help to absorb renewable energy on a large scale, realize large-scale peak load regulation of power grids, and cross-seasonal and cross-regional energy storage, and accelerate the low-carbonization of industries, construction, transportation, etc. In the field of electricity, due to the instability of renewable energy, hydrogen energy may become a new form of energy storage through the conversion of electricity-hydrogen-electricity. Among them, the power supply technology in hydrogen production is a key link in the development of hydrogen energy as a whole. Generally speaking, high-power hydrogen production power supply usually refers to power supply equipment that can support power output of MW level and above; now the power required for hydrogen production equipment is getting larger and larger, which puts higher requirements on the flexibility of its application environment.

[0003] At present, the mainstream technology of hydrogen production power supply still mainly relies on thyristors or diodes as its core components. These traditional solutions are generally designed for indoor applications and are limited by the characteristics of semi-controlled or uncontrolled devices, resulting in certain limitations in control flexibility and efficiency. However, with the innovation of technology and the vigorous development of the green hydrogen industry, IGBT hydrogen production power supply is gradually emerging and occupying an increasing market share. Although IGBT hydrogen production power supply has shown many advantages, such as high efficiency and high controllability, its current form is mainly indoor installation. The transformer, control unit and switch device in the system architecture are often arranged in different areas, which not only leads to a large footprint, but also makes the installation process complicated and lengthy, requiring a long construction period. What is particularly critical is that IGBT hydrogen production power supply generally adopts a two-stage conversion design, which further increases the complexity and cost of the system.

[0004] It can be seen that the existing hydrogen production power sources are mostly designed indoors, and key components such as transformers, control units and switch devices are arranged in different areas, resulting in a large footprint and a long construction period. Summary of the invention

[0005] The present invention provides a skid-mounted fully-controlled high-power hydrogen production power supply to solve the technical problems that the existing hydrogen production power supplies are mostly designed indoors, and key components such as transformers, control units and switch devices are arranged in different areas, resulting in a large footprint and a long construction period.

[0006] In order to achieve the above object, the present invention adopts the following technical contents:

[0007] A skid-mounted fully controlled high-power hydrogen production power source, comprising a container body;

[0008] The container body is provided with a water cooling device, a control device, a high-voltage switch device, a starting device, a transformer and a power conversion device;

[0009] Wherein, the high-voltage AC incoming line is introduced by the high-voltage switch device and connected to the transformer through the starting device;

[0010] The transformer is connected to the power conversion device, and the power conversion device is used to convert AC current into DC current output;

[0011] The control device is electrically connected to the water cooling device, the high voltage switch device and the power conversion device respectively;

[0012] The water cooling device, the control device, the high-voltage switch device, the starting device, the transformer and the power conversion device are arranged in a skid-mounted manner.

[0013] Furthermore, the interior of the container body is divided into a plurality of space units along the axial direction;

[0014] The water cooling device, the control device, the high-voltage switch device, and the starting device are located in the first space unit;

[0015] The transformer is located in the second space unit;

[0016] The power conversion device is located in the third space unit;

[0017] The first space unit, the second space unit and the third space unit are connected in sequence;

[0018] A wire hole, a busbar hole and a water pipe hole are arranged between every two adjacent space units, and all holes are provided with insulating sheaths.

[0019] Furthermore, the output side busbar of the transformer includes two gears; the switching busbar of the transformer is connected to a three-phase busbar; the three-phase busbar is located at the center of the two gears of the output side busbar; the three-phase busbar can drive the switching busbar to switch from one gear of the output side busbar to another gear to achieve two-gear output of the transformer; the switching busbar adopts a soft-connected busbar.

[0020] Furthermore, a DC bus output structure is provided at the bottom of the side wall of one side of the container body, and the DC bus output structure is used to insert a DC busbar; a plurality of the DC busbars are arranged in parallel through the wall; and a supporting assembly and a sealing structure are provided on the DC busbar.

[0021] Furthermore, the support assembly includes insulating support columns fixed to both sides of the DC busbar, and the insulating support columns are fixedly connected to the ground through insulating support members.

[0022] Further, the sealing structure includes a horizontal sealing member and a vertical sealing member;

[0023] The horizontal seal comprises two groups of first insulating rods, which are symmetrically arranged at the top and bottom of the DC busbar;

[0024] The vertical seal comprises a plurality of groups of second insulating rods, which are located on both sides of the DC busbar and between every two adjacent DC busbars;

[0025] All the second insulating rods are fixed between two groups of first insulating rods;

[0026] The first insulating rod is provided with a first insulating pad; the second insulating rod is provided with a second insulating pad.

[0027] Furthermore, the sealing structure also includes an insulating sealing plate sleeved on the DC busbar, and one side of the insulating sealing plate is arranged close to the wall.

[0028] Furthermore, the water cooling device includes a water-cooled internal machine, and the water-cooled internal machine is connected to a water-cooled external machine; the water-cooled external machine is arranged on the top of the container body.

[0029] Furthermore, the power conversion device adopts a multi-group hierarchical structure, and each hierarchical structure includes an AC bus, a module level, a module level and a DC bus arranged from upper to lower layers.

[0030] Furthermore, the modules at the module level are arranged face to face, and an inspection passage is reserved in the middle.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The present invention provides a skid-mounted fully-controlled high-power hydrogen-producing power supply. Through an integrated design, the key components such as a water cooling device, a control device, a high-voltage switch device, a starting device, a transformer and a power conversion device are all placed in a container body, and a skid-mounted layout is adopted to achieve the compactness and modularity of the system. This layout not only optimizes space utilization and reduces floor space, but also facilitates rapid installation, transportation and maintenance, and improves the flexibility and portability of the overall equipment. At the same time, since all key components are integrated in a closed and controllable environment, the safety and stability of the system are effectively improved, especially in harsh outdoor environmental conditions. It can still maintain efficient operation, thereby ensuring the high efficiency and reliability of the hydrogen production process, which is of great significance to promoting the application of green energy and promoting the development of the hydrogen energy industry. The structure and principle of the hydrogen-producing power supply are simple, easy to implement and operate, and have good promotion and application value.

[0033] Preferably, in the present invention, the container body is divided into a plurality of space units along the axial direction and the components are rationally arranged, thereby further optimizing the internal structure of the equipment, improving space utilization, facilitating independent maintenance and overhaul of the components, and improving the reliability and maintainability of the overall system.

[0034] Preferably, in the present invention, the transformer adopts a two-speed output design and is equipped with a switching busbar and a three-phase busbar, which realizes the convenience of shifting operation, improves the flexibility and adaptability of the system, and meets the needs under different working conditions. At the same time, the use of the soft-connected busbar replaces the manual knife switch, reduces the layout of the manual knife switch, and thus reduces the floor space and operating space.

[0035] Preferably, in the present invention, the DC bus output structure adopts a parallel wall-penetrating setting and is equipped with a supporting assembly and a sealing structure, which improves the safety and stability of the DC output, while facilitating the plugging and maintenance of the DC busbar, and enhancing the maintainability and scalability of the system; the above-mentioned structural setting can effectively replace the traditional sleeve bushing to save costs and solve the dilemma that there are currently no sleeves with a current level of more than 20kA in the current market, thereby meeting the design requirements of high-power hydrogen production power supplies.

[0036] Further preferably, in the present invention, the design of the insulating support column and the insulating support member ensures stable support of the DC busbar, achieves insulation from the ground, and improves the safety and reliability of the system.

[0037] Further preferably, in the present invention, the sealing structure adopts a combination of horizontal seals and vertical seals, and uses insulating pads and insulating sealing plates, which effectively prevents interference of the external environment on the DC busbar, improves the sealing and protection level of the system, and ensures the long-term stable operation of the equipment; in addition, the combination of insulating rods and insulating pads can not only solve the sealing problem, but also avoid the problem of smaller busbar spacing caused by thermal expansion of the busbar due to long-term current flow and heat generation of the DC bus.

[0038] More preferably, in the present invention, the sealing structure is further provided with an insulating sealing plate, which is arranged close to the wall, further enhancing the sealing effect, preventing water vapor, dust, etc. from entering the interior of the equipment, and improving the environmental adaptability and service life of the equipment.

[0039] Preferably, in the present invention, the water cooling device includes a water-cooled internal unit and a water-cooled external unit, and the water-cooled external unit is arranged on the top of the container. This layout is conducive to saving floor space; and is also conducive to improving heat dissipation and cooling efficiency, ensuring stable operation of the equipment in a high temperature environment.

[0040] Preferably, in the present invention, the power conversion device adopts a multi-group hierarchical structure setting, which optimizes the circuit layout, improves the power density and conversion efficiency, and facilitates modular and standardized production, thereby reducing costs.

[0041] Further preferably, in the present invention, the module levels are arranged face to face and maintenance channels are reserved, which improves the compactness and heat dissipation efficiency of the equipment, while facilitating the maintenance and replacement of the modules and reducing the difficulty and cost of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic diagram of the structure of a skid-mounted, fully-controlled, high-power hydrogen production power supply provided by an embodiment of the present invention;

[0043] Figure 2 An internal layout diagram of one side of a skid-mounted fully-controlled high-power hydrogen production power supply provided by an embodiment of the present invention;

[0044] Figure 3 The internal layout diagram of the other side of another skid-mounted fully-controlled high-power hydrogen production power supply provided by an embodiment of the present invention;

[0045] Figure 4 A top view of a skid-mounted, fully-controlled, high-power hydrogen production power supply provided by an embodiment of the present invention;

[0046] Figure 5 A schematic diagram of a switching copper bus and a DC bus outlet of a skid-mounted fully-controlled high-power hydrogen production power supply provided in an embodiment of the present invention;

[0047] Figure 6 for Figure 5 A partial enlarged view of

[0048] Figure 7 A schematic diagram of the structure of a DC bus outlet of a skid-mounted fully-controlled high-power hydrogen production power supply provided by an embodiment of the present invention;

[0049] Figure 8 A first view of the switching copper busbar connection part of a skid-mounted fully-controlled high-power hydrogen production power supply provided by an embodiment of the present invention;

[0050] Fig. 9 A second view of the switching copper busbar connection portion of a skid-mounted fully-controlled high-power hydrogen production power supply provided by an embodiment of the present invention;

[0051] Fig.10 A top view of the switching copper busbar connection portion of a skid-mounted fully-controlled high-power hydrogen production power supply provided in an embodiment of the present invention.

[0052] Reference numerals:

[0053] Container body-1, water-cooled internal unit-2, water-cooled external unit-3, control device-4, high-voltage switch device-5, starting device-6, transformer-7, power conversion device-8,

[0054] Module level-9, module level-10, AC bus-11, DC bus-12, switching bus-13, three-phase bus-14, DC bus-15, insulating sealing plate-16, first insulating rod-17, first insulating cushion-18, second insulating rod-19, insulating support column-20, second insulating cushion-21; first insulating support member-22, second insulating support member-23, output side bus-25. DETAILED DESCRIPTION

[0055] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail in the following specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0056] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0057] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0059] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0060] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0061] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] Example 1

[0063] As mentioned in the background technology, at present, the mainstream technology of hydrogen production power supply still mainly relies on thyristors or diodes as its core components. These traditional solutions are generally designed for indoor applications and are limited by the characteristics of semi-controlled or uncontrolled devices, resulting in certain limitations in control flexibility and efficiency. However, with the innovation of technology and the vigorous development of the green hydrogen industry, IGBT hydrogen production power supply is gradually emerging and occupying an increasing market share. Although IGBT hydrogen production power supply has shown many advantages, such as high efficiency and high controllability, its current form is mainly indoor installation. Transformers, control units and switch devices in the system architecture are often arranged in different areas, which not only leads to a large footprint, but also makes the installation process complicated and lengthy, requiring a long construction period. What is particularly critical is that IGBT hydrogen production power supply generally adopts a two-stage conversion design, which further increases the complexity and cost of the system. Specifically, taking the "A water electrolysis hydrogen production power supply device based on IGBT technology" disclosed in Chinese patent number CN114726241B as an example, this hydrogen production power supply device includes a rectifier module and a step-down module connected in series, the rectifier module includes a plurality of parallel rectifier modules, and the step-down module includes a plurality of parallel step-down modules; this patent describes an IGBT hydrogen production power supply based on two-stage conversion, adopts a multi-module regional layout structure, does not involve a skid-mounted structure, and does not mention a single-stage conversion hydrogen production power supply. It can be seen that the prior art has the problems of large footprint, complicated installation procedures and long construction period.

[0064] In order to solve the above problems, the present invention provides a skid-mounted fully-controlled high-power hydrogen-producing power supply. Firstly, the hydrogen-producing power supply integrates power supply, water cooling, control, switch, transformer and other equipment in a skid-mounted shell, which can meet the multi-scenario application of hydrogen-producing power supply equipment by customers. Its internal layout and structural form are novel, and some key designs can effectively improve the power supply performance; secondly, the transformer of the power supply has two-speed switching, and through structural design, the gear position of the device can be switched conveniently and quickly; finally, the sealing form of the busbar outlet of the device is novel to solve the problem that there is a lack of wall bushings suitable for large currents above this level in the existing market.

[0065] like Figure 1 and Figure 2 As shown, this embodiment provides a skid-mounted fully-controlled high-power hydrogen production power supply. This hydrogen production power supply is a fully-controlled high-power hydrogen production power supply with a current source type primary conversion as the basic topology. It adopts a skid-mounted structure layout, and integrates a water cooling device, a control device 4, a high-voltage switch device 5, a starting device 6, a transformer 7 and a power conversion device 8 in the container body 1.

[0066] The specific functions of the above components are as follows:

[0067] The water cooling device is mainly used for heat dissipation in hydrogen production power supply. During the hydrogen production process, due to the large current and high power, the electronic components inside the power supply will generate a lot of heat. The water cooling device effectively absorbs and takes away this heat through circulating water or other cooling media, ensuring that the internal components of the power supply work within the appropriate temperature range, preventing overheating damage, ensuring the stable operation of the power supply and extending its service life.

[0068] The control device 4 is the core part of the hydrogen production power supply, responsible for monitoring, regulating and protecting the entire power supply system. It receives signals from various parts of the power supply system, such as voltage, current, temperature, etc., and accurately controls the power supply system according to preset programs and parameters. At the same time, the control device 4 also has fault diagnosis and protection functions. When an abnormality occurs in the power supply system, it can cut off the power supply in time to prevent the accident from expanding and ensure the safety of personnel and equipment.

[0069] The high-voltage switch device 5 is mainly used for on-off control of the high-voltage circuit of the hydrogen production power supply. When the power supply is started, stopped or fault processing is handled, the high-voltage switch device can quickly and reliably cut off or connect the high-voltage circuit to ensure the safe operation of the power supply system. In addition, the high-voltage switch device 5 also has overload protection and short-circuit protection functions, which can quickly cut off the high-voltage circuit when an abnormal situation occurs in the power supply system to prevent equipment damage and accidents.

[0070] The starting device 6 is a key device for starting the hydrogen power supply. It is responsible for providing sufficient starting current and voltage when the power supply is started, ensuring that the power supply system can start smoothly and enter normal working state. The design of the starting device 6 needs to take into account the load characteristics and starting requirements of the power supply system to ensure a smooth and reliable starting process.

[0071] The transformer 7 is mainly used for voltage conversion in the hydrogen production power supply. Since the hydrogen production power supply needs to adapt to different grid voltages and load requirements, the transformer 7 can convert the input grid voltage into the voltage level required by the power supply system. At the same time, the transformer 7 also has an isolation function, which can prevent faults and interference in the grid from affecting the power supply system.

[0072] The power conversion device 8 is the core conversion component in the hydrogen production power supply, which is responsible for converting the input electric energy into the electric energy form required for hydrogen production. In a fully controlled high-power hydrogen production power supply, the power conversion device 8 usually adopts advanced power electronics technology, such as IGBT (insulated gate bipolar transistor), etc., to achieve efficient electric energy conversion. The power conversion device 8 can accurately adjust the output voltage and current according to the instructions of the control device 4 to meet the electric energy requirements of the hydrogen production electrolyzer.

[0073] The high-voltage AC incoming line is introduced from the high-voltage switch device 5, connected to the transformer 7 through the starting device 6, the transformer 7 converts the high-voltage input into a low-voltage input, and is connected to the power conversion device 8 through the busbar. Finally, the power conversion device 8 converts the AC current into a DC current output.

[0074] Specifically, the control device 4 is electrically connected to the water cooling device, the high-voltage switch device 5 and the power conversion device 8 respectively, and is used to start and stop the water cooling device, control the disconnection of the high-voltage switch device 5, and adjust the output current capacity of the power conversion device 8.

[0075] In this embodiment, the water cooling device uses a water cooling internal unit 2 located inside the container body 1 and a water cooling external unit 3 arranged on the top of the container body 1; such an arrangement saves the floor space of the water cooling device.

[0076] Combination Figure 2 and Figure 3 As shown, in this embodiment, the interior of the container body 1 is divided into at least three space units along the axial direction, such as Figure 2 In the figure, from left to right, it is divided into the first space unit, the second space unit and the third space unit; Figure 4As shown, the control device 4, the high-voltage switch device 5, and the starting device 6 are located in the first space unit; the transformer 7 is independently located in the second space unit; the power conversion device 8 is independently located in the third space unit; wire holes, busbar holes and water pipe holes are provided between every two adjacent space units, and all holes are provided with insulating sheaths; such a structural design optimizes the internal structure of the equipment, improves space utilization, and facilitates independent maintenance and overhaul of each component, thereby improving the reliability and maintainability of the overall system.

[0077] like Figure 3 As shown, the power conversion device 8 adopts a hierarchical structure, and the levels from top to bottom are the top AC bus 11, the module level 10, the module level 9 and the bottom DC bus 12; among them, in order to improve the compactness and heat dissipation efficiency of the equipment, and at the same time facilitate the maintenance and replacement of the modules and reduce the maintenance difficulty and cost, in this embodiment, the modules of the module level 9 are arranged face to face, and an inspection channel is left in the middle.

[0078] The power conversion device 8 adopts a hierarchical structure arrangement, which can optimize the circuit layout, improve the power density and conversion efficiency, and facilitate modular and standardized production, while reducing costs.

[0079] like Figure 5 As shown, in order to realize the convenience of the gear shifting operation of the hydrogen production power supply, the transformer 7 of the hydrogen production power supply is set with two-gear output, and the gear shifting is performed by switching the busbar 13, which reduces the layout of the knife switch and saves the floor space and cost. Among them, the three-phase busbar 14 to the power conversion device 8 is respectively located in the middle position of the two gears of the transformer 7. When the switching busbar 13 is connected to the two gear positions, it is installed on both sides 14 of the three-phase busbar, and its distance to the two gear positions is consistent; in this embodiment, the switching busbar 13 is a soft connection busbar; the use of the soft connection busbar replaces the manual knife switch, reduces the layout of the manual knife switch, and thus reduces the floor space and operation space.

[0080] More specifically, combined Figure 8 , Fig. 9 and Fig.10 As shown, the output side busbar 25 of the transformer is divided into two output gears, namely A1, B1, C1 as one gear, A2, B2, C2 as one gear, and the two gears can be switched by changing the position of the switching busbar 13. The switching busbar 13 is a soft connection, and the position of the three-phase busbar 14 connected to the rear end of the switching busbar 13 is at the center of A1 and A2, B1 and B2, C1 and C3. Fig.10 As shown, taking the B-phase connecting busbar as an example, the distance L1 from the B-phase busbar of the three-phase busbar 14 to the B1 of the transformer output busbar 25 and the distance L2 to the B2 busbar are equal.

[0081] It can be seen that the present embodiment provides a skid-mounted fully-controlled high-power hydrogen production power supply. By integrating the key components such as the water cooling device, the control device, the high-voltage switch device, the starting device, the transformer and the power conversion device, the compactness and modularity of the system are achieved. It not only optimizes the space utilization and reduces the floor space, but also facilitates rapid installation, transportation and maintenance, and improves the flexibility and portability of the overall equipment. At the same time, it effectively improves the safety and stability of the system, especially in harsh outdoor environments. It can still maintain efficient operation, thereby ensuring the high efficiency and reliability of the hydrogen production process.

[0082] Example 2

[0083] like Figure 5 and Figure 7 As shown, this embodiment also provides another skid-mounted fully controlled high-power hydrogen production power supply. The basic structure of this embodiment is the same as that of embodiment 1, and is optimized and improved on the basis of embodiment 1, as follows:

[0084] In order to solve the problem that the DC busbar 15 has a large output current and there are currently no finished wall bushings on the market; this embodiment provides a new busbar wall penetration solution, which can effectively replace the sleeve bushing to save costs and solve the dilemma that there are currently no bushings with a current rating of more than 20kA on the market.

[0085] Specific as Figure 6 and Figure 7 As shown, a hidden container wall is used, and the insulating support 20 is made of high-strength insulating parts. A number of DC busbars 15 of equal thickness, equal distance and parallel connection are fixed on the bottom plate. When passing through the wall, a horizontal seal composed of an insulating rod 18 and an insulating pad 17 and a vertical seal composed of an insulating rod 19 and an insulating pad 21 are used for sealing. The vertical seals are respectively located on both sides of the output of the DC busbar 15 and in the equidistant gap between the DC busbars 15. The horizontal seals are respectively located on the upper and lower sides. The horizontal seals and the vertical seals are fastened with insulating screws. Finally, an insulating sealing plate 16 is used to add secondary sealing when the DC busbar 15 passes through the wall. The specific structure is as follows:

[0086] like Figure 5 and Figure 6 As shown, multiple groups of DC busbars 15 are connected in parallel through the wall, and support components located on both sides are used to provide support force, such as Figure 7 As shown, the specific support assembly includes an insulating support column 20, the bottom of which is fixed to the ground through a first insulating support member 22 and a second insulating support member 23, wherein the first insulating support member 22 and the second insulating support member 23 adopt a bent plate structure to ensure a good supporting effect.

[0087] In order to ensure the sealing effect of multiple groups of DC busbars 15, in this embodiment, horizontal seals and vertical seals are arranged on the DC busbar 15. The horizontal seals use two groups of symmetrically arranged first insulating rods 17, which are located at the top and bottom of the DC busbar 15; the vertical seals use multiple groups of second insulating rods 19, which are located on both sides of the output of the DC busbar 15 and between two adjacent DC busbars 15. The combination of insulating rods and insulating cushions can not only solve the sealing problem, but also avoid the problem of smaller busbar spacing caused by thermal expansion of the busbar due to long-term current flow and heat generation of the DC bus.

[0088] Another example Figure 7 As shown, in this embodiment, a secondary sealing structure is added to the DC busbar 15, that is, an insulating sealing plate 16 is sleeved on the DC busbar 15, and one side of the insulating sealing plate is arranged close to the wall; the sealing effect is further enhanced, preventing water vapor, dust, etc. from entering the interior of the equipment, and improving the environmental adaptability and service life of the equipment.

[0089] It can be seen that this embodiment provides a skid-mounted fully-controlled high-power hydrogen production power supply, which adopts a busbar output sealing form. Specifically, a support component and a sealing structure are set for the DC busbar, which ensures good support and sealing effects, and can solve the problem that the current high-current bushings are all non-standard customization.

[0090] In summary, the present invention provides a skid-mounted fully controlled high-power hydrogen production power supply, which has the following advantages over existing hydrogen production power supplies:

[0091] First, integrated and modular design: The skid-mounted layout allows key components such as water cooling devices, control devices, high-voltage switch devices, starting devices, transformers and power conversion devices to be highly integrated into the container body, which not only reduces the footprint, improves the mobility and flexibility of the equipment, but also facilitates transportation, installation and maintenance.

[0092] Second, space optimization and insulation protection: The interior of the container is divided into multiple space units along the axial direction, and each unit is used to place specific equipment, which effectively utilizes the space and reduces mutual interference. At the same time, the wire holes, busbar holes and water pipe holes between each two adjacent space units are equipped with insulating sheaths to enhance electrical safety performance.

[0093] Third, high-efficiency transformer design: The transformer adopts a two-speed output design, which cooperates with the switching busbar and the three-phase busbar to realize the shifting operation, which improves the flexibility and adaptability of the power output and meets the hydrogen production needs under different working conditions.

[0094] Fourth, DC bus output structure optimization: The DC bus output structure adopts a parallel through-the-wall setting and is equipped with supporting components and sealing structures, which ensures the stable installation and good sealing of the DC busbar and improves the reliability and safety of the system.

[0095] Fifth, perfect sealing and insulation measures: The sealing structure effectively prevents interference from the external environment and damage to internal electrical components through the combination of horizontal seals and vertical seals, as well as the application of insulating pads and insulating sealing plates, ensuring the long-term and stable operation of the equipment.

[0096] Sixth, efficient heat dissipation system: The water cooling device includes a water-cooled internal unit and a water-cooled external unit. In particular, the water-cooled external unit is arranged on the top of the container, which is conducive to the rapid dissipation of heat, ensures the normal operation of the equipment in a high temperature environment, and can also save floor space.

[0097] Seventh, multi-level power conversion device: The power conversion device adopts a multi-level structure setting, each layer has a clear structure, and is easy to manage and maintain; the modules in the module level are arranged face to face and maintenance channels are reserved, which improves the maintainability and maintenance efficiency of the equipment.

[0098] The above embodiment is only one of the implementation methods that can realize the technical solution of the present invention. The scope of protection claimed by the present invention is not limited only to this embodiment, but also includes changes, replacements and other implementation methods that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention.

Claims

1. A skid-mounted fully controlled high-power hydrogen production power supply, characterized in that: It comprises a container body (1); The container body (1) is provided with a water cooling device, a control device (4), a high-voltage switch device (5), a starting device (6), a transformer (7) and a power conversion device (8); The high-voltage AC incoming line is introduced by the high-voltage switch device (5) and connected to the transformer (7) through the starting device (6); The transformer (7) is connected to the power conversion device (8), and the power conversion device (8) is used to convert alternating current into direct current output; The control device (4) is electrically connected to the water cooling device, the high-voltage switch device (5) and the power conversion device (8) respectively; The water cooling device, the control device (4), the high-voltage switch device (5), the starting device (6), the transformer (7) and the power conversion device (8) are arranged in a skid-mounted manner.

2. The skid-mounted fully controlled high-power hydrogen production power supply according to claim 1 is characterized in that: The interior of the container body (1) is divided into a plurality of space units along the axial direction; The water cooling device, the control device (4), the high-voltage switch device (5), and the starting device (6) are located in the first space unit; The transformer (7) is located in the second space unit; The power conversion device (8) is located in the third space unit; The first space unit, the second space unit and the third space unit are connected in sequence; A wire hole, a busbar hole and a water pipe hole are arranged between every two adjacent space units, and all holes are provided with insulating sheaths.

3. The skid-mounted fully controlled high-power hydrogen production power supply according to claim 1 is characterized in that: The output side busbar (25) of the transformer (7) comprises two gears; the switching busbar (13) of the transformer (7) is connected to a three-phase busbar (14); the three-phase busbar (14) is located at a central position between the two gears of the output side busbar (25); the three-phase busbar (14) can drive the switching busbar (13) to switch from one gear of the output side busbar (25) to another gear to achieve two-gear output of the transformer (7); the switching busbar (13) adopts a soft connection busbar.

4. The skid-mounted fully controlled high-power hydrogen production power supply according to claim 1 is characterized in that: A DC bus output structure is provided at the bottom of a side wall of one side of the container body (1), and the DC bus output structure is used to insert a DC busbar (15); a plurality of the DC busbars (15) are arranged in parallel through the wall; and a support assembly and a sealing structure are provided on the DC busbar (15).

5. The skid-mounted fully controlled high-power hydrogen production power supply according to claim 4 is characterized in that: The support assembly comprises insulating support columns (20) fixed to both sides of the DC busbar (15), and the insulating support columns (20) are fixedly connected to the ground via insulating support members.

6. The skid-mounted fully controlled high-power hydrogen production power supply according to claim 4 is characterized in that: The sealing structure includes a horizontal sealing member and a vertical sealing member; The horizontal sealing member comprises two groups of first insulating rods (17) symmetrically arranged at the top and bottom of the DC busbar (15); The vertical sealing member comprises a plurality of groups of second insulating rods (19) located on both sides of the DC busbar (15) and between every two adjacent DC busbars (15); All the second insulating rods (19) are fixed between two groups of first insulating rods (17); The first insulating rod (17) is provided with a first insulating pad (18); and the second insulating rod (19) is provided with a second insulating pad (21).

7. The skid-mounted fully controlled high-power hydrogen production power supply according to claim 6 is characterized in that: The sealing structure further comprises an insulating sealing plate (16) sleeved on the DC busbar (15), and one side of the insulating sealing plate (16) is arranged close to the wall.

8. The skid-mounted fully controlled high-power hydrogen production power supply according to claim 1 is characterized in that: The water cooling device comprises a water cooling internal machine (2), the water cooling internal machine (2) being connected to a water cooling external machine (3); the water cooling external machine (3) being arranged on the top of the container body (1).

9. The skid-mounted fully controlled high-power hydrogen production power supply according to claim 1 is characterized in that: The power conversion device (8) is arranged in a plurality of hierarchical structures, each hierarchical structure comprising an AC bus (11), a module level (10), a module level (9) and a DC bus (12) arranged from upper to lower layers.

10. The skid-mounted fully controlled high-power hydrogen production power supply according to claim 9 is characterized in that: The modules of the module level (9) are arranged face to face, and a maintenance passage is reserved in the middle.

Images