Mobile Huai-type box transformer substation for wind power overhead outgoing line

Abstract

The utility model discloses a mobile Hua-type box transformer substation for wind power overhead outgoing lines, and relates to the technical field of transformer substations. The utility model specifically comprises a box body, the box body is provided with a transformer, the box body comprises a mounting wall provided with a high-voltage side isolation switch, one end of a switch assembly connected with an overhead line penetrates through the side wall of the box body, the switch assembly is inversely arranged on the mounting wall, and the switch assembly is connected with the transformer. According to the utility model, the box body comprises the mounting wall provided with the switch assembly, so that the switch assembly can be connected with the cable from the side surface and is connected with an overhead line through the cable, the required length of the cable is reduced, the reconstruction construction of a cable trench and other foundations is not needed, and the mounting cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer substations, and specifically provides a mobile Chinese-style box transformer for wind power overhead lines. Background Art

[0002] For conventional Hua-style box-type transformers, the foundation of the Hua-style box-type transformer needs to be prepared in advance on site, including digging cable trenches, making strip ring beams, etc. After the foundation is completed, the Hua-style box-type transformer is transported to the site and placed on the foundation for cable wiring and debugging.

[0003] However, for some wind power boosting projects, the 35kV outgoing line is an overhead outgoing line. When the Chinese-style box transformer is connected to the overhead line, a cable is needed to connect the switch assembly on the lower side of the Chinese-style box transformer, and the switch assembly is set in the foundation. Therefore, one end of the cable is led down to the foundation, which requires excavation and reconstruction of the foundation, and the other end of the cable is led up to the overhead line, and the amount of cable used is also large. And when the cable is introduced, it is also necessary to rebuild the foundation of the Chinese-style box transformer and transform the foundation, and the cable cost and transformation cost are very high. Therefore, the existing Chinese-style box transformer has the problem of high transformation cost when connecting the overhead line. Utility Model Content

[0004] The utility model provides a mobile Chinese-style box transformer for wind power overhead outgoing lines. The existing Chinese-style box transformer has the problem of high transformation cost when connecting the overhead lines.

[0005] The technical solution of the utility model is as follows:

[0006] A mobile Chinese-style box transformer for wind power overhead lines comprises a box body, the box body is provided with a transformer, the box body comprises a mounting wall provided with a switch assembly, one end of the switch assembly connected to the overhead line passes through the side wall of the box body, the switch assembly is inverted on the mounting wall, and the switch assembly is connected to the transformer.

[0007] In this solution, the overhead line can be directly connected to the switch assembly on the side wall of the box through a cable, without the need for construction and modification of the foundation, thus achieving the purpose of reducing construction costs. The inverted installation of the switch assembly can also make the connection point between the switch assembly and the cable higher, further reducing the amount of cable used. In addition, since the switch assembly is set on the side wall of the box, it can achieve a plug-and-play effect, increasing the convenience of use.

[0008] Preferably, the switch assembly comprises an isolating switch, a circuit breaker and an earthing switch, the isolating switch, the circuit breaker and the earthing switch are installed in sequence from top to bottom, the isolating switch, the circuit breaker and the earthing switch are respectively connected to the transformer, and the isolating switch is used to connect the overhead line.

[0009] In this solution, the isolating switch is set on the upper side, which can not only increase the connection height with the cable to reduce the amount of cable used, but also avoid the circuit breaker being blocked by the high-voltage side cable when connecting the low-voltage side cable. The mutual interference between the high-voltage side cable and the low-voltage side cable is reduced, which facilitates the installation and layout of the cable.

[0010] In order to solve the problem of unstable installation of the isolating switch, a wall bushing is provided on the side wall of the box body. The wall bushing passes through the side wall of the box body, and the isolating switch is connected to the wall bushing.

[0011] In this solution, the isolating switch is connected to the wall bushing, and the connection surface between the wall bushing and the isolating switch is large, which can ensure the stability of the isolating switch after installation. In addition, the wall bushing can be modified at will, which is more convenient for connection with the side wall of the box.

[0012] Preferably, the installation wall is arranged in the box.

[0013] In this solution, the installation wall is arranged in the box, so that the circuit breaker and the grounding switch are arranged in the box, which can reduce the damage of the circuit breaker and the grounding switch caused by the harsh external environment, increase the service life, and reduce the maintenance cost.

[0014] Preferably, the wall bushing is arranged at the top of the side surface of the box body.

[0015] In this solution, the wall bushing is arranged at the top of the side of the box body, so that the isolating switch is installed at the top, thereby reducing the number of cables connected to the overhead line and reducing the cost of using the cables.

[0016] Preferably, at least three wall bushings are provided, and the wall bushings are arranged at the same height.

[0017] In this solution, the wall bushing is used to install the isolating switch, and the number of wall bushings is the same as the isolating switch. Under normal circumstances, three isolating switches need to be installed. Under different circumstances, six or more isolating switches may be installed, and more wall bushings are also required. Setting the wall bushings at the same height not only facilitates the installation of cables, avoids the obstruction of the installed cables to the subsequent installation, but also makes the cables more neat and beautiful after installation.

[0018] The cable connected to the switch assembly is an output line. To facilitate the connection of the input line, a cable hole is provided on one side wall of the box body. The height of the cable hole is the same as the height of the copper busbar at the bottom of the circuit breaker.

[0019] In this solution, the input line can pass through the side wall of the box from the cable hole, and then connect to the copper busbar at the bottom of the circuit breaker in the box. The height of the cable hole is the same as the height of the copper busbar, so that the input line does not need to be bent or deformed during installation, which can reduce the difficulty of installing the input line.

[0020] Preferably, the number of the cable holes is the same as the number of the wall bushings.

[0021] Preferably, the cable hole and the wall bushing are on the same side wall.

[0022] In this solution, the cable hole and the wall bushing are arranged on the same side wall, so that the input line and the output line are installed on the same side, which can reduce the complexity of cable installation. During maintenance, the cable only needs to be inspected and maintained from one side of the box, which is convenient for maintenance.

[0023] Preferably, the height of the cable hole is lower than the height of the wall bushing.

[0024] In this solution, the cable hole is used to connect to the outdoor wind turbine unit, and the maintenance frequency is much higher than the maintenance frequency of the switch assembly and the overhead line. Therefore, the cable hole is set on the lower side of the wall bushing to facilitate maintenance operations. At the same time, it can also avoid the cables connected to the switch assembly from blocking the maintenance work during the maintenance process.

[0025] Beneficial effects of the utility model:

[0026] The box of the utility model includes an installation wall on which a switch assembly is installed, so that the switch assembly can be connected to a cable from the side and connected to an overhead line through the cable, thereby reducing the required length of the cable and not requiring reconstruction of the foundation such as the cable trench, thereby reducing the installation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the present utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a cross-sectional view of the utility model;

[0029] Figure 2 It is a left view of the utility model.

[0030] In the above drawings, the corresponding reference numerals are as follows:

[0031] 1. Box; 2. Installation wall; 3. Transformer; 4. Circuit breaker; 5. Copper busbar; 6. Cable hole; 7. Wall bushing; 8. Isolating switch. DETAILED DESCRIPTION

[0032] In conjunction with the accompanying drawings, the technical solution of the present utility model is clearly and completely explained through the specific implementation methods of the embodiments of the present utility model.

[0033] Embodiment 1.

[0034] like Figure 1 As shown, this embodiment 1 provides a mobile Chinese-style box transformer for wind power overhead outgoing lines, including a box 1 for installing a transformer 3, a mounting wall 2 is provided inside the box 1, a switch assembly is provided on the mounting wall 2, the switch assembly is connected to the transformer 3, and the switch assembly is used to connect the transformer 3 and the output line, which is the cable connected to the overhead line. One end of the switch assembly connected to the overhead line passes through the side wall of the box 1, so that the cable can be connected to the switch assembly outside the box 1.

[0035] The switch assembly includes an isolating switch 8, a circuit breaker 4 and a grounding switch. In the prior art, the switch assembly in the Chinese-style box-type transformer is installed in the foundation, wherein the isolating switch 8, the circuit breaker 4 and the grounding switch are installed sequentially from bottom to top. Therefore, the isolating switch 8, the circuit breaker 4 and the grounding switch in the first embodiment are installed sequentially from top to bottom, that is, the switch assembly is inverted on the installation wall 2.

[0036] The isolating switch 8 , the circuit breaker 4 and the grounding switch are connected to the transformer 3 respectively.

[0037] The isolating switch 8 is connected to the overhead line through a cable, and the cable connected to the isolating switch 8 is an output line, while the circuit breaker 4 is connected to the wind turbine unit through a cable, and the cable connected to the circuit breaker 4 is an input line.

[0038] The side wall of the box body 1 is provided with a wall bushing 7, which penetrates both sides of the side wall of the box body 1, and the isolating switch 8 is installed on the wall bushing 7. The isolating switch 8 passes through the wall bushing 7, so that the cable can be connected to the isolating switch 8 outside the box body 1.

[0039] The wall bushing 7 is arranged at the top of the side wall to reduce the distance between the disconnector 8 and the overhead line, thereby reducing the length of the cable between the disconnector 8 and the overhead line, thereby achieving the purpose of reducing costs.

[0040] like Figure 2 As shown, three wall bushings 7 are arranged on the top of the side wall of the box body 1, and the isolating switch 8 is used to pass through the wall bushings 7. The number of the wall bushings 7 can also be six, nine or more.

[0041] The bottom of the side wall of the box body 1 is provided with a cable hole 6, and the cable connected to the fan unit can pass through the cable hole 6 to connect to the circuit breaker 4. A copper busbar 5 is provided at the lower end of the circuit breaker 4 to connect to the cable, and the height of the cable hole 6 is the same as that of the copper busbar 5, so that the cable can pass through the cable hole 6 and directly connect to the copper busbar 5.

[0042] The number of the cable holes 6 is the same as the number of the wall bushings 7 .

[0043] The cable hole 6 is arranged at the bottom of the side wall, so as to avoid mutual interference and obstruction between the output line and the input line during installation and maintenance.

[0044] Each wall bushing 7 is arranged in the horizontal direction, and each cable hole 6 is also arranged in the horizontal direction. Arranging in the horizontal direction is more convenient for identification and installation.

[0045] The cable hole 6 and the wall bushing 7 are arranged on the same side wall of the box body 1, so as to facilitate the maintenance and arrangement of the input line and the output line.

Claims

1. A mobile Chinese-style box-type transformer for wind power overhead lines, characterized in that: The invention comprises a box (1), wherein the box (1) is provided with a transformer (3), wherein the box (1) comprises a mounting wall (2) provided with a switch assembly, wherein one end of the switch assembly connected to an overhead line passes through a side wall of the box (1), wherein the switch assembly is inverted on the mounting wall (2), and wherein the switch assembly is connected to the transformer (3).

2. The mobile Chinese-style box-type transformer for wind power overhead line according to claim 1 is characterized in that: The switch assembly comprises an isolating switch (8), a circuit breaker (4) and an earthing switch. The isolating switch (8), the circuit breaker (4) and the earthing switch are installed in sequence from top to bottom. The isolating switch (8), the circuit breaker (4) and the earthing switch are respectively connected to the transformer (3). The isolating switch (8) is used to connect an overhead line.

3. The mobile Chinese-style box-type transformer for wind power overhead line according to claim 2 is characterized in that: The side wall of the box body (1) is provided with a wall bushing (7), the wall bushing (7) penetrates the side wall of the box body (1), and the isolating switch (8) is connected to the wall bushing (7).

4. The mobile Chinese-style box-type transformer for wind power overhead line according to claim 3 is characterized in that: The installation wall (2) is arranged in the box body (1).

5. The mobile Chinese-style box-type transformer for wind power overhead line according to claim 3 is characterized in that: The wall bushing (7) is arranged at the top of the side surface of the box body (1).

6. The mobile Chinese-style box-type transformer for wind power overhead line according to claim 3 is characterized in that: At least three wall-penetrating sleeves (7) are provided, and the wall-penetrating sleeves (7) are arranged at the same height.

7. The mobile Chinese-style box-type transformer for wind power overhead line according to claim 3 is characterized in that: A side wall of the box body (1) is provided with a cable hole (6), and the height of the cable hole (6) is the same as the height of the lower copper busbar (5) of the circuit breaker (4).

8. The mobile Chinese-style box-type transformer for wind power overhead line according to claim 7 is characterized in that: The number of the cable holes (6) is the same as the number of the wall bushings (7).

9. The mobile Chinese-style box-type transformer for wind power overhead line according to claim 7 is characterized in that: The cable hole (6) and the wall bushing (7) are located on the same side wall.

10. The mobile Chinese-style box-type transformer for wind power overhead line according to claim 9, characterized in that: The height of the cable hole (6) is lower than the height of the wall bushing (7).

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