35kV dynamic compensation-free device prefabricated cabin and heat dissipation method

Abstract

The invention relates to the field of heat dissipation of static var generators, in particular to a 35kV dynamic compensation-free device prefabricated cabin and a heat dissipation method. Comprising a prefabricated cabin body and power devices arranged in the prefabricated cabin body, the interior of the prefabricated cabin body is divided into a first cavity and a second cavity through a partition plate, an electrical system and a water cooling system are arranged in the second cavity, and a plurality of power valve frames used for containing the power devices are sequentially arranged in the first cavity at intervals. Wherein at least one heat exchanger is further arranged at the top of the prefabricated cabin body. Layout optimization is conducted on the internal structure of the prefabricated cabin, the water-air heat exchanger is arranged on the top of the prefabricated cabin, the problems that in a traditional structure, the size is too large, and space utilization is unreasonable are solved, through the compact and efficient design, arrangement of all power devices is ensured, the overall occupied area of the prefabricated cabin is reduced, and cost is reduced. And installation and deployment are more flexible and convenient.

Description

Technical Field

[0001] The invention relates to the field of heat dissipation of static VAR generators, and in particular to a prefabricated cabin of a 35kV dynamic non-compensation device and a heat dissipation method. Background Art

[0002] In the context of the current rapid development of new energy and the large-scale access of power electronic equipment to the power grid, the necessity of controlling and compensating reactive power is increasing day by day. Dynamic reactive power compensation devices (SVG) have a wide range of application scenarios and a broad market capacity. High-voltage dynamic reactive power compensation devices can enhance power transmission capabilities, reduce power loss, compensate for reactive power, control harmonics, suppress flicker, stabilize grid voltage, balance three-phase systems, change the damping characteristics of the system, and improve the stability of the system. They have a wide range of applications. They can be widely used in new energy, petrochemicals, power systems, metallurgy, electrified railways, urban construction and other industries.

[0003] Prior art application number 202322550237.4, entitled A Compact Direct-mounted Water-cooled SVG Container, discloses a box body, wherein the interior of the box body is divided into two independent compartments by a compartment component, an SVG control cabinet and a water cooler, wherein the two independent compartments are: a high-pressure compartment and a low-pressure compartment; three power modules corresponding to independent ABC three-phases are arranged inside the high-pressure compartment, and an SVG control cabinet and a water cooler are arranged inside the low-pressure compartment; the three power modules are arranged in an L-shape inside the box body and are arranged in a manner of surrounding the low-pressure compartment. The problem with this scheme is that the primary and secondary compartments of the prefabricated cabin scheme are close to each other, and the power modules are It is difficult to inspect and maintain, and the wiring method of the prefabricated cabin is confusing; Application No. 202221562967.5, named A water-cooled SVG container heat dissipation system discloses a water-cooled SVG container body, a power chamber, a water cooler and an external water-to-air heat exchanger. The power chamber is provided with a power unit assembly and an internal water-to-air heat exchanger assembly. The internal water-to-air heat exchanger assembly includes an internal water-to-air heat exchanger, and the internal water-to-air heat exchanger includes a water-to-air heat exchanger body and a fan. The fan blows air toward the power unit assembly. A water-cooled heat dissipation pipeline is provided inside the power chamber. The water-cooled heat dissipation pipeline includes a water inlet pipe and a water return pipe arranged around the power unit assembly. The problem with this solution is that the outdoor water-to-air heat exchange fan is placed on a horizontal ground, and the whole machine occupies a large area. In order to facilitate module inspection, a large number of prefabricated cabin doors are opened, and the cooling water path has poor flow uniformity. Summary of the invention

[0004] In view of the problems mentioned in the prior art, the present invention proposes a prefabricated cabin and heat dissipation method for a 35kV dynamic non-compensation device. The internal structure of the prefabricated cabin is optimized to facilitate the inspection and maintenance of the power module. In view of the distribution of heat-generating components inside the prefabricated cabin, liquid cooling pipelines and industrial air conditioning are used to dissipate heat, ensuring that the 35kV dynamic reactive power compensation device operates in a stable constant temperature environment, greatly extending the service life of the equipment.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: The present invention discloses a prefabricated cabin for a 35kV dynamic non-compensation device, comprising a prefabricated cabin body and power devices arranged in the prefabricated cabin body, wherein the prefabricated cabin body is divided into a first chamber and a second chamber by a partition, the second chamber is provided with an electrical system and a water cooling system, a plurality of power valve racks for placing power devices are arranged in sequence at intervals in the first chamber, wherein at least one heat exchanger is also provided on the top of the prefabricated cabin body.

[0006] As a further improvement of the present invention, the electrical system includes a cabin distribution box and a control cabinet.

[0007] As a further improvement of the present invention, the power valve rack includes an A-phase power valve rack, a B-phase power valve rack and a C-phase power valve rack, wherein the A-phase power valve rack, the B-phase power valve rack and the C-phase power valve rack are all connected to the 35kV system through a wall bushing.

[0008] As a further improvement of the present invention, it also includes an air cooling device, each of which is respectively arranged to align with the A-phase power valve rack, the B-phase power valve rack and the C-phase power valve rack.

[0009] As a further improvement of the present invention, an inspection channel is provided between the A-phase power valve rack and the B-phase power valve rack, and an inspection channel is provided between the B-phase power valve rack and the C-phase power valve rack.

[0010] As a further improvement of the present invention, one end of the water cooling system is connected to the heat exchanger, and the other end is connected to the power valve rack; the water cooling system includes a water-cooled main unit and a pipeline connected to the water-cooled main unit, the pipeline includes a first water inlet pipe and a second water return pipe surrounding the power valve rack, and a second water inlet pipe and a second water return pipe connected to the heat exchanger.

[0011] As a further improvement of the present invention, the partition includes a first partition for isolating the water cooling system and a second partition for isolating the electrical system.

[0012] As a further improvement of the present invention, at least one inspection door is provided on the prefabricated cabin body.

[0013] A heat dissipation method for a prefabricated cabin of a 35kV dynamic non-compensation device comprises the following steps: The cooling medium flows into the power valve rack through the first water inlet pipe, absorbs the heat of the power valve rack and heats up to become high-temperature cooling medium. The high-temperature cooling medium returns to the water-cooled main unit through the second water outlet pipe. The cooling medium enters from the bottom and exits from the top, and can take away a large amount of heat. At this time, the high-temperature cooling medium is pressurized by the water pump of the water-cooled main unit and flows into the heat exchanger through the second water inlet pipe. The heat exchanger cools the high-temperature cooling medium through high-speed air flow. The cooled cooling medium flows back to the water-cooled main unit through the second return pipe, forming a complete coolant cycle.

[0014] As a further improvement of the present invention, when the current of the 35kV system passes through the copper busbar conductor in the power valve rack, the generated heat can be absorbed by the air cooling device.

[0015] Compared with the prior art, the present invention has achieved the following technical effects: The present invention optimizes the layout of the internal structure of the prefabricated cabin and places the water-to-air heat exchanger on the top of the prefabricated cabin, thereby solving the problems of oversize and unreasonable space utilization in the traditional structure. Through the compact and efficient design, it not only ensures the placement of all power devices, but also reduces the overall footprint of the prefabricated cabin, making installation and deployment more flexible and convenient.

[0016] The present invention provides maintenance channels, each of which can separate multiple power valve racks, making it simple and direct for workers to inspect and replace power devices without going back and forth, greatly shortening maintenance time, reducing operation and maintenance costs, and improving the maintainability and reliability of the equipment.

[0017] The present invention combines liquid cooling technology with a dual cooling solution of industrial air conditioning, providing a stable and efficient constant temperature operating environment for the power devices inside the power valve frame, effectively extending the life of the equipment and improving the heat dissipation effect; in addition, by optimizing the design and layout of the water cooling system, the problem of poor water cooling flow distribution is effectively solved, ensuring the uniform distribution of the cooling medium in the system, and further improving the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a top view of the overall structure of the present invention; Figure 3 It is a schematic diagram of the cooling system of the present invention; Figure 4 It is a schematic diagram of the internal structure of the overall structure of the present invention.

[0019] Figure numerals: 11. Prefabricated cabin body; 12. Cabin body distribution box; 13. Control cabinet; 14. Water cooling system; 15. First inspection door; 16. Second inspection door; 21. Second partition; 22. Wall bushing; 23. First partition; 31. Water-cooled main unit; 32. Second water inlet pipe; 33. Second water return pipe; 34. Heat exchanger; 35. First water return pipe; 36. First water inlet pipe; 41. A-phase industrial air conditioner; 42. B-phase industrial air conditioner; 43. C-phase industrial air conditioner; 44. A-phase power valve rack; 45. B-phase power valve rack; 46. C-phase power valve rack. DETAILED DESCRIPTION

[0020] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0025] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0026] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0027] It should be further understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0028] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0029] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0030] like Figure 1 and Figure 2As shown, the present invention provides a prefabricated cabin for a 35kV dynamic non-compensation device, comprising a prefabricated cabin body 11 and power devices arranged in the prefabricated cabin body 11, wherein the prefabricated cabin body 11 is divided into a first chamber and a second chamber by a partition, the second chamber is provided with an electrical system and a water cooling system 14, a plurality of power valve racks for placing power devices are arranged in sequence at intervals in the first chamber, wherein at least one heat exchanger 34 is also provided on the top of the prefabricated cabin body 11.

[0031] The prefabricated cabin in the embodiment realizes the primary and secondary electrical isolation of the prefabricated cabin by setting the partition, avoids the electromagnetic interference of the 35kV primary strong current, and optimizes the overall layout; at the same time, the heat exchanger 34 is arranged on the top of the prefabricated cabin body 11, so that the footprint of the entire structure is smaller.

[0032] The heat exchanger 34 in the embodiment is preferably a water-air heat exchanger 34, and the heat exchanger 34 can transfer the heat in the cooling medium to the air, thereby achieving the effect of heating or cooling; in this embodiment, there are two heat exchangers 34, but it is not limited to this, and the specific number of heat exchangers 34 can be increased or decreased according to actual installation requirements; The electrical system includes a cabin distribution box 12 and a control cabinet 13. In the embodiment, the cabin distribution box 12 is a device responsible for power distribution and protection, and is provided with reasonable electrical wiring and switch devices for introducing external power and distributing power to various internal functional modules; the control cabinet 13 is a device in the electrical system responsible for monitoring, controlling and adjusting the operating status of various functional modules, and is usually closely connected to the cabin distribution box 12, and through complex electrical connections and signal transmission, it realizes precise control of the entire 35kV dynamic reactive power compensation device.

[0033] The power valve rack includes an A-phase power valve rack 44, a B-phase power valve rack 45 and a C-phase power valve rack 46, wherein the A-phase power valve rack 44, the B-phase power valve rack 45 and the C-phase power valve rack 46 are all connected to the 35kV system through the wall bushing 22. Figure 2 As shown, each phase power valve rack in the embodiment includes a series of power electronic devices, through which rapid response and regulation of reactive power in the power system can be achieved; the wall bushing 22 is preferably made of insulating material, which has the characteristics of high strength, high insulation performance and corrosion resistance, so that the power valve rack can be safely and reliably connected to the 35kV system, while avoiding safety hazards caused by improper electrical connection. When the A-phase, B-phase and C-phase power valve racks are connected to the corresponding phases of the 35kV system through their respective wall bushings 22, it is ensured that each phase power valve rack can independently process the power signal of the corresponding phase, and accurate compensation of reactive power is achieved.

[0034] It also includes air cooling devices, each of which is respectively arranged to face the A-phase power valve frame 44, the B-phase power valve frame 45, and the C-phase power valve frame 46. Figure 4 As shown, the air cooling device in the embodiment is preferably an industrial air conditioner, including an A-phase industrial air conditioner 41, a B-phase industrial air conditioner 42 and a C-phase industrial air conditioner 43 arranged corresponding to each phase power valve rack; the industrial air conditioner can quickly take away the heat generated by the power valve rack, ensure that the temperature inside the prefabricated cabin body 11 remains stable, and ensure that each power valve rack can operate within a safe operating temperature range.

[0035] An inspection channel is provided between the A-phase power valve rack 44 and the B-phase power valve rack 45, and an inspection channel is provided between the B-phase power valve rack 45 and the C-phase power valve rack 46. The inspection channel provided in the embodiment enables the staff to directly reach the periphery of each power valve rack without bypassing other equipment or performing complicated operations, which is extremely convenient; in addition, it helps to reduce the risk of direct contact between the operation and maintenance personnel and the live equipment during the operation, thereby ensuring the safety of the staff.

[0036] The water cooling system 14 is connected to the heat exchanger 34 at one end and to the power valve rack at the other end; the water cooling system 14 includes a water cooling main unit 31 and pipelines connected to the water cooling main unit 31, the pipelines including a first water inlet pipe 36 and a second water return pipe 33 surrounding the power valve rack and a second water inlet pipe 32 and a second water return pipe 33 connected to the heat exchanger 34. Figure 3 The figure shows the arrangement of the water cooling system 14 in the present device, wherein the water cooling main unit 31 is arranged in the second chamber, the water cooling main unit 31 is connected to the inlet end of the heat exchanger 34 through the second water inlet pipe 32, and the outlet end of the heat exchanger 34 is connected to the water cooling main unit 31 through the second water return pipe 33, wherein one end of the water cooling main unit 31 is connected to the first water return pipe 35 and the first water inlet pipe 36, Figure 3 In the embodiment, the first return pipe 35 and the first inlet pipe 36 are connected to each phase power valve rack, which can take away the generated heat. The cooling medium in the embodiment is preferably water or coolant. The specific heat dissipation process is: the cooling medium flows into the power valve rack through the first inlet pipe 36, absorbs the heat of the power valve rack and heats up to become a high-temperature cooling medium. The high-temperature cooling medium returns to the water-cooled main unit 31 through the second outlet pipe. The cooling medium enters from the bottom and exits from the top, which can take away a large amount of heat; at this time, the high-temperature cooling medium is pressurized by the water pump of the water-cooled main unit 31, and flows into the heat exchanger 34 through the second inlet pipe 32. The heat exchanger 34 cools the high-temperature cooling medium through high-speed air flow. The cooled cooling medium flows back to the water-cooled main unit 31 through the second return pipe 33, forming a complete coolant cycle, transferring the heat generated inside the power valve rack to the outdoor air, and ensuring the normal operation of the power devices inside the power valve rack.

[0037] The partition includes a first partition 23 for separating the water cooling system 14 and a second partition 21 for separating the electrical system. In the embodiment, the first partition 23 and the second partition 21 separate the water cooling system 14 and the electrical system respectively, avoiding electromagnetic interference of 35kV primary strong electricity and ensuring normal operation of the system.

[0038] At least one inspection door is provided on the prefabricated cabin body 11. The inspection doors in the embodiment are provided with two first inspection door 15 and second inspection door 16, respectively, so that the staff can easily enter the cabin to perform daily inspection, maintenance and troubleshooting on components such as the power valve rack, air cooling device, and water cooling system 14.

[0039] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0040] In addition, it should be understood that although this specification is described in accordance with the implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art. The above content is only to illustrate the technical idea of ​​the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution according to the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A 35kV dynamic non-compensation device prefabricated cabin, characterized in that: It includes a prefabricated cabin body and power devices arranged in the prefabricated cabin body, wherein the prefabricated cabin body is divided into a first chamber and a second chamber by a partition, the second chamber is provided with an electrical system and a water cooling system, and a plurality of power valve racks for placing power devices are arranged in sequence at intervals in the first chamber, wherein at least one heat exchanger is also provided on the top of the prefabricated cabin body.

2. According to claim 1, a 35kV dynamic non-compensation device prefabricated cabin is characterized in that: The electrical system includes a cabin distribution box and a control cabinet.

3. According to claim 1, a 35kV dynamic non-compensation device prefabricated cabin is characterized in that: The power valve rack includes an A-phase power valve rack, a B-phase power valve rack and a C-phase power valve rack, wherein the A-phase power valve rack, the B-phase power valve rack and the C-phase power valve rack are all connected to the 35kV system through a wall bushing.

4. According to claim 3, a 35kV dynamic non-compensation device prefabricated cabin is characterized in that: It also includes air cooling devices, each of which is respectively arranged to align with the A-phase power valve rack, the B-phase power valve rack and the C-phase power valve rack.

5. According to claim 4, a 35kV dynamic non-compensation device prefabricated cabin is characterized in that: An inspection passage is provided between the A-phase power valve rack and the B-phase power valve rack, and an inspection passage is provided between the B-phase power valve rack and the C-phase power valve rack.

6. According to claim 1, a 35kV dynamic non-compensation device prefabricated cabin is characterized in that: One end of the water cooling system is connected to the heat exchanger, and the other end is connected to the power valve rack; The water cooling system includes a water cooling main unit and pipelines connected to the water cooling main unit, wherein the pipelines include a first water inlet pipe and a second water return pipe surrounding a power valve rack, and a second water inlet pipe and a second water return pipe connected via a heat exchanger.

7. According to claim 1, a 35kV dynamic non-compensation device prefabricated cabin is characterized in that: The partition includes a first partition for isolating a water cooling system and a second partition for isolating an electrical system.

8. The 35kV dynamic non-compensation device prefabricated cabin according to claim 1, characterized in that: The prefabricated cabin body is provided with at least one inspection door.

9. A heat dissipation method for a prefabricated cabin of a 35kV dynamic non-compensation device according to any one of claims 1 to 8, characterized in that: The following steps are involved: The cooling medium flows into the power valve rack through the first water inlet pipe, absorbs the heat of the power valve rack and heats up to become high-temperature cooling medium. The high-temperature cooling medium returns to the water-cooled main unit through the second water outlet pipe. The cooling medium enters from the bottom and exits from the top, and can take away a large amount of heat. At this time, the high-temperature cooling medium is pressurized by the water pump of the water-cooled main unit and flows into the heat exchanger through the second water inlet pipe. The heat exchanger cools the high-temperature cooling medium through high-speed air flow. The cooled cooling medium flows back to the water-cooled main unit through the second return pipe, forming a complete coolant cycle.

10. The heat dissipation method of a prefabricated cabin of a 35kV dynamic non-compensation device according to claim 9, characterized in that: When the current of the 35kV system passes through the copper busbar conductor in the power valve rack, the heat generated can be absorbed by the air cooling device.

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