An immersed converter valve device

Abstract

The present application relates to the technical field of heat dissipation of converter valve, and discloses a submerged converter valve device, comprising a box body, a converter valve module and a cooling module, wherein the converter valve module comprises a plurality of converter valve assemblies, the plurality of converter valve assemblies are arranged in the vertical direction and staggered in sequence, and the bubbles generated by the lower converter valve assemblies are not blocked by the upper converter valve assemblies, so that the situation that the bubbles are gathered to increase the heat transfer thermal resistance between the bottom surface of the upper converter valve assemblies and the cooling liquid is avoided, and the heat transfer efficiency of the submerged converter valve device is improved.

Description

Technical Field

[0001] This invention relates to the technical field of heat dissipation for converter valves, and more particularly to an immersion converter valve device. Background Technology

[0002] Converter valves are crucial equipment in ultra-high voltage direct current (UHVDC) transmission, and high-power thyristors are the core components of these high-power power electronic devices. Excessive temperature can cause the electronic components in converter valves to fail. Besides the inherent performance of the thyristors themselves, operating temperature is a key factor affecting their reliability. Studies show that 55% of all power electronic device failures are caused by excessively high temperatures, and traditional air-cooling technology is insufficient to meet the protection requirements of thyristors in high-power transmission and distribution equipment. Therefore, to ensure the operational stability of converter valves, the existing converter valve structure needs to be improved to efficiently enhance its heat dissipation capacity.

[0003] Immersion cooling involves submerging components in a low-boiling-point cooling liquid. The components transfer heat to the insulating coolant, which absorbs the heat and vaporizes into steam. The steam is then liquefied by an external cold source to continue absorbing heat. Immersion cooling offers advantages such as good cooling effect, simple structure, low cost, and high reliability. Furthermore, it meets the heat dissipation requirements of lightweight, highly integrated electronic devices, making it a promising candidate for application in the thermal management of converter valves. However, existing immersion converter valve devices consist of multiple converter valves arranged parallel vertically. Bubbles generated by the heating of the lower valves accumulate in the upper valves, significantly increasing the thermal resistance between the upper valve walls and the coolant, resulting in low heat transfer efficiency. Summary of the Invention

[0004] This invention provides a submersible converter valve device, which solves the technical problem of low heat transfer efficiency in existing submersible converter valve devices.

[0005] The present invention provides an immersion converter valve device, comprising: a housing, a converter valve module, and a cooling module;

[0006] The box is filled with coolant.

[0007] The cooling module is located at the top of the housing;

[0008] The converter valve module includes a mounting frame and multiple converter valve assemblies;

[0009] The fixing frame is suspended and fixed inside the box;

[0010] Multiple converter valve assemblies are respectively mounted on the fixed frame, and the multiple converter valve assemblies are arranged alternately in a vertical direction.

[0011] Optionally, each of the converter valve assemblies is inclined in the horizontal direction.

[0012] Optionally, the interior of the cooling module is connected to the interior of the housing.

[0013] Optionally, the cooling module includes multiple condenser tube bundles;

[0014] The condenser tube bundle has an inverted U-shaped structure.

[0015] Optionally, the condenser tube bundle has multiple fins on its side, and foam metal is filled between the multiple fins.

[0016] Optionally, the foam metal is a porosity gradient foam metal, wherein the porosity of the foam metal gradually increases in the direction away from the outer surface of the condenser tube bundle.

[0017] Optionally, the converter valve assembly includes two converter valves arranged side by side, each converter valve including a clamp, multiple thyristors, and multiple heat sinks;

[0018] The thyristor and the heat sink are alternately arranged to form the main body of a single valve;

[0019] The clamps are located at both ends of the single valve body.

[0020] Optionally, it may also include a wiring module;

[0021] Each of the aforementioned converter valve assemblies is electrically connected in sequence;

[0022] The wiring module is located on the side of the enclosure and is electrically connected to the converter valve assembly.

[0023] Optionally, the wiring module includes a high-voltage AC terminal, a low-voltage DC terminal, and a high-voltage DC terminal;

[0024] The high-voltage AC terminal, the low-voltage DC terminal, and the high-voltage DC terminal are arranged sequentially along the side of the enclosure in a vertical direction.

[0025] Optionally, the mounting bracket is suspended and fixed to the housing by bolts;

[0026] The fixing frame does not contact any of the interior surfaces of the box.

[0027] As can be seen from the above technical solutions, the present invention has the following advantages:

[0028] This invention provides a submersible converter valve device, comprising: a housing, a converter valve module, and a cooling module. The converter valve module includes multiple converter valve assemblies arranged alternately in a vertical direction. Bubbles generated by the lower converter valve assembly are not blocked by the upper converter valve assembly, thus avoiding the situation where bubble accumulation increases the thermal resistance between the bottom surface of the upper converter valve assembly and the coolant, thereby improving the heat transfer efficiency of the submersible converter valve device. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a submersible converter valve device provided in an embodiment of the present invention;

[0031] Figure 2 A top view showing the arrangement of the various converter valve assemblies provided in an embodiment of the present invention;

[0032] Figure 3 A three-dimensional schematic diagram of the arrangement of various converter valve assemblies provided in an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the structure of the condenser tube bundle provided in an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the structure of a single-valve converter valve provided in an embodiment of the present invention. Detailed Implementation

[0035] This invention provides a submersible converter valve device to solve the technical problem of low heat transfer efficiency in existing submersible converter valve devices.

[0036] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of an immersion converter valve device provided in Embodiment 1 of the present invention.

[0040] Embodiment 1 of the present invention provides an immersion converter valve device, comprising: a housing 1, a converter valve module, and a cooling module 2;

[0041] The housing 1 is filled with coolant;

[0042] Cooling module 2 is located at the top of housing 1;

[0043] The converter valve module includes a mounting bracket 3 and multiple converter valve assemblies 4;

[0044] The mounting bracket 3 is suspended and fixed inside the housing 1;

[0045] Multiple converter valve assemblies 4 are respectively installed on the fixed frame 3, and the multiple converter valve assemblies 4 are arranged alternately in the vertical direction.

[0046] Understandably, the multiple converter valve assemblies 4 inside the housing 1 are submerged in the coolant filling the housing 1. When the converter valve assemblies 4 are working, the heat generated causes the coolant inside the housing 1 to vaporize and evaporate, carrying away the heat. The coolant vapor is condensed into coolant droplets by the cooling system at the top of the housing 1 and drips back into the housing 1 under gravity. The coolant is preferably a low-boiling-point liquid with good chemical inertness, electrical insulation, and thermal conductivity.

[0047] It should be noted that the mounting bracket 3 can be fixed inside the housing 1 by bolts; in order to ensure the heat transfer effect of the coolant convection, it is necessary to ensure that the coolant has a sufficient flow area around the converter valve assembly 4. The multiple converter valve assemblies 4 are installed on the mounting bracket 3 without contacting each other, and the mounting bracket 3 and the multiple converter valve assemblies 4 are not in contact with any of the interior surfaces of the housing 1.

[0048] Multiple converter valve assemblies 4 are arranged in a staggered manner along the vertical direction, meaning that in the vertical direction, each layer of converter valve assembly 4 is offset from the converter valve assembly 4 of the layer above and the layer below by a certain position, forming a layout in which multiple converter valve assemblies 4 intersect each other but do not overlap when viewed from above; for example Figure 2 As shown, when there are three converter valve assemblies 4, the converter valve assemblies 4 in each layer are staggered at 60° to each other in the vertical direction.

[0049] Because multiple valves are arranged in a staggered manner along the vertical direction, the bubbles generated by the heating of the lower converter valve assembly rise to the cooling module 2 at the top of the housing 1 and condense, preventing them from accumulating on the bottom surface of the upper converter valve assembly. This avoids the situation where bubble accumulation increases the thermal resistance between the bottom surface of the upper converter valve assembly and the coolant, thus improving the heat transfer efficiency of the submersible converter valve device.

[0050] Furthermore, if there is a limitation on the vertical installation space of the converter valve device, the parallel arrangement of multiple converter valve assemblies will result in a smaller distance between adjacent converter valve assemblies, and the corresponding flow area of ​​coolant between the converter valve assemblies will also be smaller, resulting in poor convective heat transfer effect; while arranging multiple converter valve assemblies 4 in a staggered manner along the vertical direction can increase the flow area of ​​coolant between the converter valve assemblies 4 and promote convective heat transfer.

[0051] Furthermore, each converter valve assembly 4 is inclined in the horizontal direction.

[0052] like Figure 3 As shown, based on the arrangement of multiple converter valve assemblies 4 arranged alternately in a vertical direction, the converter valve assemblies 4 can be further inclined in a horizontal direction. This allows the bubbles generated by the heat generated by the converter valve assemblies 4 to move along the inclined surface of the converter valve assemblies 4 under the combined influence of buoyancy, gravity, and surface tension, driving the surrounding coolant to flow. This allows more fresh coolant to exchange heat with the surface of the converter valve assemblies 4, increasing the convective heat transfer coefficient in this area. Furthermore, as the bubbles rise, they also disrupt the coolant boundary layer on the surface of the converter valve assemblies 4, reducing the thickness of the coolant boundary layer. This further improves the convective heat transfer effect between the surface of the converter valve assemblies 4 and the coolant, thereby further improving the heat transfer efficiency of the submerged converter valve device.

[0053] In a preferred embodiment, the interior of the cooling module 2 is connected to the interior of the housing 1.

[0054] Understandably, the connection between the interior of the cooling module 2 and the interior of the housing 1 allows for a larger contact area between the rising coolant vapor and the cooling module 2, promoting vapor condensation. Specifically, the cooling module 2 may include multiple condenser tube bundles 21, which have an inverted U-shaped structure. The inlet and outlet of the condenser tube bundles 21 are both connected to the interior of the housing 1 at the top. After the coolant vapor condenses into coolant droplets on the inner wall of the condenser tube bundles 21, it can flow smoothly back into the housing 1 through the inverted U-shaped structure.

[0055] Furthermore, the side of the condenser tube bundle 21 is provided with a plurality of fins 22, and foam metal 23 is filled between the plurality of fins 22.

[0056] It should be noted that multiple fins 22 are arranged in parallel on both sides of the condenser tube bundle 21 or around the side of the condenser tube bundle 21. The interior of the fins 22 is connected to the interior of the condenser tube bundle 21, which increases the heat transfer area of ​​the condenser tube bundle 21. Foam metal is a lightweight material with a porous structure. Filling the fins 22 with foam metal can increase the specific surface area for heat transfer, and heat can be quickly conducted in the metal structure, thereby achieving better heat conduction performance. Since the thinner the fins 22, the larger the relative heat transfer area, but thin fins 22 are also easily damaged under external forces, filling the fins 22 with foam metal can also share the external forces borne by the fins 22, increase the structural rigidity of the condenser tube bundle 21 at the fins 22, and make the fin structure less susceptible to damage.

[0057] Furthermore, the foam metal 23 is a porosity gradient foam metal, and the porosity of the foam metal 23 gradually increases along the direction away from the outer surface of the condenser tube bundle 21.

[0058] It is understandable that selecting foam metal with lower porosity in the area near the outer side of the condenser tube can increase the heat exchange surface area and promote heat transfer and dissipation. The porosity of this area is preferably 70%. Selecting foam metal with higher porosity in the area away from the outer side of the condenser tube can reduce air resistance and make it easier for air to carry away heat through the pores. The porosity of the foam metal in this area is preferably 95%. The porosity of the foam metal in the middle area gradually increases in the direction away from the outer side of the condenser tube bundle 21.

[0059] In a preferred embodiment, the converter valve assembly 4 includes two side-by-side converter valve units, such as... Figure 5 As shown, the single converter valve includes a clamp 41, multiple thyristors 42, and multiple heat sinks 43;

[0060] The thyristor 42 and the heat sink 43 are alternately arranged to form the main body of the single valve;

[0061] The clamps 41 are located at both ends of the single valve body.

[0062] It should be noted that "side by side" refers to being based on Figure 5 As shown, the two converter valves are arranged side-by-side or front-to-back, excluding those arranged vertically. The clamp 41 is used to press and fix multiple alternating thyristors 42 and multiple heat sinks 43; the number of thyristors 42 needs to have a certain redundancy to ensure that the submersible converter valve device can continue to operate normally even if some thyristors 42 fail.

[0063] In a preferred embodiment, the submersible converter valve device of the present invention further includes a wiring module 5;

[0064] Each converter valve assembly 4 is electrically connected in sequence;

[0065] The wiring module 5 is located on the side of the housing 1 and is electrically connected to the converter valve assembly 4.

[0066] Furthermore, the wiring module 5 includes a high-voltage AC terminal 51, a low-voltage DC terminal 52, and a high-voltage DC terminal 53;

[0067] High-voltage AC terminal 51, low-voltage DC terminal 52 and high-voltage DC terminal 53 are arranged sequentially on the side of the housing 1 in a vertical direction.

[0068] Understandably, wiring module 5 is used to connect converter valve assembly 4 to external equipment.

[0069] In the several embodiments provided in this application, it should be understood that the disclosed devices and modules can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0070] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0071] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A submersible converter valve device, characterized in that, include: The enclosure, the converter valve module, and the cooling module; The box is filled with coolant. The cooling module is located at the top of the housing; The converter valve module includes a mounting frame and multiple converter valve assemblies; The fixing frame is suspended and fixed inside the box; Multiple converter valve assemblies are respectively mounted on the fixing frame, and the multiple converter valve assemblies are arranged alternately with each other in a vertical direction; The arrangement of the plurality of converter valve assemblies in a staggered manner along the vertical direction specifically includes: in the vertical direction, each layer of converter valve assembly is offset from the converter valve assembly of the layer above and the layer below by a certain position, forming a layout in which the plurality of converter valve assemblies intersect each other and do not overlap when viewed from above; when the number of converter valve assemblies is three, the converter valve assemblies in each layer are staggered at 60° to each other in the vertical direction. Each of the aforementioned converter valve assemblies is arranged at an angle in the horizontal direction; The interior of the cooling module is connected to the interior of the housing; The cooling module includes multiple condenser tube bundles; The condenser tube bundle has an inverted U-shaped structure; The condenser tube bundle has multiple fins on its side, and foam metal is filled between the multiple fins; The foam metal is a porosity gradient foam metal, wherein the porosity of the foam metal gradually increases in the direction away from the outer surface of the condenser tube bundle; The multiple converter valve assemblies inside the housing are submerged in the coolant filling the housing.

2. The submersible converter valve device according to claim 1, characterized in that, The converter valve assembly includes two converter valves arranged side by side, and each converter valve includes a clamp, multiple thyristors, and multiple heat sinks. The thyristor and the heat sink are alternately arranged to form the main body of a single valve; The clamps are located at both ends of the single valve body.

3. The submersible converter valve device according to claim 1, characterized in that, It also includes a wiring module; Each of the aforementioned converter valve assemblies is electrically connected in sequence; The wiring module is located on the side of the enclosure and is electrically connected to the converter valve assembly.

4. The submersible converter valve device according to claim 3, characterized in that, The wiring module includes a high-voltage AC terminal, a low-voltage DC terminal, and a high-voltage DC terminal. The high-voltage AC terminal, the low-voltage DC terminal, and the high-voltage DC terminal are arranged sequentially along the side of the enclosure in a vertical direction.

5. The submersible converter valve device according to claim 1, characterized in that, The mounting bracket is suspended and fixed inside the box by bolts; The fixing frame does not contact any of the interior surfaces of the box.

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