Compact water-cooling SVG power device

Abstract

The utility model discloses a compact water-cooling SVG power device, which comprises an SVG power device body, the SVG power device body comprises a box body, an I-GBT assembly and a capacitor, and a water-cooling assembly is arranged in the box body; the water cooling assembly comprises two heat exchange plates which are tightly attached to each other, a plurality of sinking grooves are formed in the heat exchange plates, heat exchange pipes are arranged in the sinking grooves, and the heat exchange pipes are distributed on the heat exchange plates in a snake shape. According to the SVG power device, the water cooling assembly is arranged, the heat exchange plate is adopted to abut against the IGBT assembly and the capacitor respectively, the heat exchange plate is matched with the heat exchange tube to transmit heat to the cooling fins, so that the temperature of the SVG power device is reduced, the expansion joints are matched with the connectors, when the temperature of the capacitor or the IGBT assembly is too high, the expansion joints extend, and then the connectors are driven to be separated; and the electrical connection between the IGBT assembly and the capacitor is disconnected, so that the loss expansion caused by equipment failure is avoided, and the safety of the SVG power device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hardware processing equipment, in particular to a compact water-cooled SVG power device. Background Art

[0002] SVG (static var compensation device) is an advanced reactive power compensation device. Its main working principle is to use a power electronic converter (such as IGBT) to control the reactor connected to the AC side. According to the real-time reactive power demand of the load, the reactive output of the reactor is adjusted in real time to achieve the purpose of compensating the reactive power of the system. SVG can respond quickly to changes in the reactive load of the power grid and perform reactive power compensation almost in real time.

[0003] In a compact water-cooled SVG power device proposed in my country's utility model patent CN209692360U, an IGBT component is arranged on a water-cooled radiator to dissipate heat, and the laminated busbar extends to the IGBT component and the capacitor component for connection. When the capacitor component fails, the intermediate partition and even the water-cooled radiator can effectively isolate the capacitor component to prevent the IGBT component from being affected. However, this design does not give full play to the advantages of water-cooled heat dissipation, and the structure is too complicated. Therefore, we propose a compact water-cooled SVG power device to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the problems existing in the prior art and proposes a compact water-cooled SVG power device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A compact water-cooled SVG power device comprises an SVG power device body, wherein the SVG power device body comprises a box, an IGBT component and a capacitor, and a water cooling component is arranged in the box;

[0007] The water cooling component includes two heat exchange plates close to each other, a plurality of troughs are provided on the heat exchange plates, heat exchange tubes are arranged in the troughs, wherein the heat exchange tubes are distributed on the heat exchange plates in a serpentine shape, the heat exchange tubes are arranged between the two heat exchange plates, the heat exchange plates are arranged opposite to the IGBT components and capacitors, and the IGBT components and capacitors are arranged on both sides of the heat exchange plates respectively, a plurality of expansion joints are also arranged in the troughs, and connectors are provided on the expansion joints, the capacitors are electrically connected to the IGBT components via the connectors, the heat exchange tubes are connected to a liquid storage tank, and a driving pump is also provided on the liquid storage tank, a heat sink is also provided in the box, and the heat exchange tubes are arranged opposite to the heat sink.

[0008] Preferably, the expansion joint comprises a shell, an inner shell is slidably connected to the shell, a glass sleeve is further arranged in the shell, and the glass sleeve is filled with kerosene, and two ends of the glass sleeve are fixedly connected to the shell and the inner shell.

[0009] Preferably, the connector comprises adapters fixedly connected to the shell and the inner shell respectively, and conductive sheets are provided at the ends of the two adapters close to each other, and the adapters are electrically connected to the IGBT component and the capacitor respectively.

[0010] Preferably, the heat sink comprises a heat dissipation plate fixedly connected to the box body, the heat dissipation plate is arranged against the heat exchange tube, a plurality of fins are fixedly connected to the heat dissipation plate, and a fan is arranged on the inner wall of the box body close to the heat dissipation plate.

[0011] Preferably, a coolant is provided in the liquid storage tank, and a diastolic joint is provided in the liquid storage tank.

[0012] Preferably, strip openings are provided on the upper surface and side walls of the box body, and a dustproof net is placed on the upper surface of the box body.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model sets a water cooling component, uses a heat exchange plate to offset the IGBT component and the capacitor respectively, and uses the heat exchange plate with a heat exchange tube to transfer heat to the heat sink, thereby reducing the temperature of the SVG power device, and uses multiple expansion joints to cooperate with the connector. When the temperature of the capacitor or IGBT component is too high, the expansion joint is extended, thereby driving the connector to separate, disconnecting the electrical connection between the IGBT component and the capacitor, avoiding the expansion of losses caused by equipment failure, and improving the safety of the SVG power device;

[0015] 2. The utility model provides an expansion joint consisting of a shell, an inner shell and a glass sleeve. When the temperature of the heat exchange plate reaches a certain level, the kerosene expands to support the glass sleeve, and then the inner shell slides relative to the shell. Within the temperature variation range of the SVG power device, the expansion joint will not expand or contract, thereby ensuring the stability of the connector during the operation of the SVG power device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a compact water-cooled SVG power device proposed by the utility model;

[0017] Figure 2 It is a schematic diagram of the side cross-section structure of a compact water-cooled SVG power device proposed by the utility model;

[0018] Figure 3 A schematic diagram of the heat exchange plate structure of a compact water-cooled SVG power device proposed in the utility model;

[0019] Figure 4 A schematic diagram of the expansion joint structure of a compact water-cooled SVG power device proposed by the utility model;

[0020] Figure 5 for Figure 2 Schematic diagram of the cross-sectional structure at point A in the middle.

[0021] In the figure: 1, box body; 2, I GBT assembly; 3, capacitor; 4, heat exchange plate; 5, heat exchange tube; 6, liquid storage tank; 7, drive pump; 8, heat sink; 9, shell; 10, inner shell; 11, glass sleeve; 12, adapter; 13, conductive sheet; 14, fin; 15, fan; 16, diastolic joint; 17, strip mouth. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Reference Figure 1-5 A compact water-cooled SVG power device comprises an SVG power device body, wherein the SVG power device body comprises a box 1, an IGBT component 2 and a capacitor 3, wherein a water cooling component is arranged in the box 1;

[0024] The water cooling assembly includes two heat exchange plates 4 that are close to each other, and a plurality of sinks are provided on the heat exchange plates 4. Heat exchange tubes 5 are provided in the sinks, and the heat exchange tubes 5 are provided between the two heat exchange plates 4.

[0025] In this design, the heat exchange plates 4 are located on both sides of the heat exchange tube 5 to ensure that the heat exchange tube 5 is covered, and when the heat exchange tube 5 leaks after long-term use, the heat exchange plates 4 are used to prevent the medium in the heat exchange tube 5 from leaking;

[0026] The heat exchange plate 4 is arranged to be offset against the IGBT component 2 and the capacitor 3, and the IGBT component 2 and the capacitor 3 are respectively arranged on both sides of the heat exchange plate 4, a plurality of expansion joints are also arranged in the sink, and a connector is arranged on the expansion joint, and the capacitor 3 is electrically connected to the IGBT component 2 through the connector, the heat exchange tube 5 is connected to the liquid storage tank 6, and the liquid storage tank 6 is also provided with a driving pump 7, and a heat sink is also arranged in the box body 1, and the heat exchange tube 5 is arranged to be offset against the heat sink;

[0027] In the above design, the heat exchange plate 4 separates the IGBT component 2 and the capacitor 3, and the two are respectively arranged on both sides of the heat exchange plate 4. While the heat exchange plate 4 is used to dissipate heat for the IGBT component 2 and the capacitor 3, they are also isolated. During the operation of the SVG power device, the driving pump 7 is used to drive the medium in the liquid storage tank 6 to enter the heat exchange tube 5 along the liquid storage tank 6, so as to realize water cooling of the IGBT component 2 and the capacitor 3. When the IGBT component 2 or the capacitor 3 fails and overheats, the expansion joint expands after being heated, so that the connector is separated, and then the electrical connection between the capacitor 3 and the IGBT component 2 is disconnected, and the SVG power device stops running. This design ensures that the IGBT component 2 and the capacitor 3 in the SVG power device are water-cooled during daily use. When the IGBT component 2 or the capacitor 3 fails, the electrical connection can be interrupted in time to avoid further expansion of the failure and reduce equipment losses.

[0028] Further, the expansion joint comprises a shell 9, an inner shell 10 is slidably connected in the shell 9, a glass sleeve 11 is also arranged in the shell 9, and the glass sleeve 11 is filled with kerosene, and both ends of the glass sleeve 11 are fixedly connected to the shell 9 and the inner shell 10;

[0029] In the above design, the shell 9 is arranged on the heat exchange plate 4, so that the temperature of the shell 9 is close to that of the heat exchange plate 4, and the shell 9 will transfer the heat of the heat exchange plate 4 to the glass sleeve 11 in the shell 9. When the temperature of the shell 9 is too high, the kerosene expands due to the heat and breaks the glass shell. At this time, the internal pressure of the shell 9 is also relatively large. At the same time, the inner shell 10 will not be restricted by the glass sleeve 11 and can slide relative to the shell 9, eventually making the expansion joint elongate and driving the connector to separate. During the normal operation of the IGBT component 2 and the capacitor 3 within the temperature range, the glass sleeve 11 will limit the sliding of the inner shell 10, so that the overall length of the expansion joint will not change or the change amplitude is very small, and will not interfere with the connection of the connector.

[0030] Furthermore, the connector includes adapters 12 fixedly connected to the housing 9 and the inner housing 10 respectively, and conductive sheets 13 are provided at the ends of the two adapters 12 close to each other, and the adapters 12 are electrically connected to the IGBT component 2 and the capacitor 3 respectively;

[0031] Based on the above design, when the inner shell 10 moves relative to the housing 9 , the connector can realize electrical connection between the IGBT component 2 and the capacitor 3 .

[0032] Furthermore, the heat sink includes a heat sink 8 fixedly connected to the housing 1, the heat sink 8 is arranged against the heat exchange tube 5, a plurality of fins 14 are fixedly connected to the heat sink 8, and a fan 15 is arranged on the inner wall of the housing 1 close to the heat sink 8. In this design, the heat sink 8 is used to dissipate heat for the water-cooled medium, and cooperates with the fins 14 to expand the heat exchange area and quickly reduce the temperature of the medium.

[0033] Furthermore, the liquid storage tank 6 is provided with a coolant, and a diastolic joint 16 is provided in the liquid storage tank 6. In this embodiment, the coolant is a coolant commonly used in water cooling equipment in the prior art, which avoids corrosion to the heat exchange tube 5, and the expansion after heating is relatively small and will not freeze in cold weather. The diastolic joint 16 is provided so that after the coolant expands and contracts due to its own heat, the diastolic joint 16 will shrink and reduce the pressure in the liquid storage tank 6, thereby avoiding damage or deformation of the liquid storage tank 6 and the heat exchange tube 5 due to excessive internal pressure.

[0034] Furthermore, the upper surface and side wall of the box body 1 are provided with a strip opening 17, and a dust screen is placed on the upper surface of the box body 1. In this design, when the air flow circulates, the fan 15 draws air from the upper surface of the box body 1 and blows it toward the heat sink 8 and the fins 14 and discharges it from the side wall of the box body 1, while the dust screen is placed at the strip opening 17 for air intake, which is also convenient for the user to remove the dust screen for cleaning later.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A compact water-cooled SVG power device, comprising an SVG power device body, wherein the SVG power device body comprises a housing (1), an IGBT assembly (2) and a capacitor (3), wherein: A water cooling component is arranged in the box (1); The water cooling component comprises two heat exchange plates (4) closely attached to each other, a plurality of troughs are provided on the heat exchange plates (4), a heat exchange tube (5) is arranged in the troughs, the heat exchange tube (5) is arranged between the two heat exchange plates (4), the heat exchange plate (4) is arranged opposite to the IGBT component (2) and the capacitor (3), and the IGBT component (2) and the capacitor (3) are arranged on both sides of the heat exchange plate (4), a plurality of expansion joints are also arranged in the troughs, and a connector is provided on the expansion joints, the capacitor (3) is electrically connected to the IGBT component (2) via the connector, the heat exchange tube (5) is connected to a liquid storage tank (6), and a driving pump (7) is also provided on the liquid outlet pipe, a heat sink is also provided in the box body (1), and the heat exchange tube (5) is arranged opposite to the heat sink.

2. A compact water-cooled SVG power device according to claim 1, characterized in that: The expansion joint comprises a shell (9), an inner shell (10) is slidably connected inside the shell (9), a glass sleeve (11) is also arranged inside the shell (9), and the glass sleeve (11) is filled with kerosene, and two ends of the glass sleeve (11) are fixedly connected to the shell (9) and the inner shell (10).

3. A compact water-cooled SVG power device according to claim 2, characterized in that: The connector comprises adapters (12) respectively fixedly connected to the shell (9) and the inner shell (10); conductive sheets (13) are provided at the ends of the two adapters (12) close to each other; and the adapters (12) are respectively electrically connected to the IGBT assembly (2) and the capacitor (3).

4. A compact water-cooled SVG power device according to claim 1, characterized in that: The heat sink comprises a heat dissipation plate (8) fixedly connected to the housing (1); the heat dissipation plate (8) is arranged to abut against the heat exchange tube (5); a plurality of fins (14) are fixedly connected to the heat dissipation plate (8); and a fan (15) is arranged on the inner wall of the housing (1) close to the heat dissipation plate (8).

5. A compact water-cooled SVG power device according to claim 1, characterized in that: The liquid storage tank (6) is provided with cooling liquid, and a diastolic joint (16) is provided in the liquid storage tank (6).

6. A compact water-cooled SVG power device according to claim 2, characterized in that: The upper surface and side walls of the box body (1) are provided with strip-shaped openings (17), and a dustproof net is placed on the upper surface of the box body (1).

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