Prefabricated transformer substation matched with column type circuit breaker of 60kV level and above

Abstract

The utility model discloses a prefabricated substation equipped with a 60kV-level and above column type circuit breaker, which comprises a high-voltage chamber, a transformer and a low-voltage chamber, the column type circuit breaker, an isolating switch and a grounding terminal are fixed in the high-voltage chamber, the column type circuit breaker is provided with a first wiring terminal, the isolating switch is provided with an isolating knife, one end of the isolating knife is fixed, and the other end of the isolating knife is provided with a second wiring terminal. The isolation knife can rotate with the fixed end of the isolation knife as the center, the other end of the isolation knife can be connected with the first wiring terminal or the grounding terminal when the isolation knife rotates, and the voltage grade of the prefabricated substation can be improved under the condition that transportation is allowed, and the voltage grade can be 60 kV or above.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated transformers, in particular to a prefabricated transformer substation equipped with a column type circuit breaker of 60 kV or above. Background Art

[0002] Integrating high-voltage cabinets, transformers and low-voltage cabinets into one in the factory results in a prefabricated transformer, referred to as a box transformer. Prefabricated substations have the advantages of small size, low cost and short on-site construction period, and have been widely used in indoor and outdoor substations.

[0003] Prefabricated substations need to be integrated in the factory first and then transported to the site for installation. During transportation, the volume of the prefabricated substation cannot be too large, otherwise it will cause transportation difficulties. Therefore, the voltage level of the prefabricated substation is very limited, and the maximum can only reach 35kV, which is difficult to use in situations with higher voltage levels. Utility Model Content

[0004] In view of the defects of the above-mentioned prior art, the purpose of the utility model is to provide a prefabricated substation equipped with a 60kV and above column-type circuit breaker to solve the problem of limited voltage level of the prefabricated substation.

[0005] The purpose of the utility model is achieved by the following technical solutions:

[0006] A prefabricated substation equipped with a 60kV or higher column type circuit breaker comprises a high voltage chamber, a transformer and a low voltage chamber, wherein a column type circuit breaker, a disconnector and a grounding terminal are fixed in the high voltage chamber, a first wiring terminal is arranged on the column type circuit breaker, an isolating knife is arranged on the isolating switch, one end of the isolating knife can be connected or disconnected with the isolating switch, and the other end can be connected or disconnected with the first wiring terminal or the grounding terminal, one end of the isolating knife is fixed, and the isolating knife can rotate with its fixed end as the center.

[0007] Furthermore, the isolating knife is connected to the isolating switch and the connection position between the two is hinged, the isolating knife can rotate around its hinged end, and the other end of the isolating knife can be connected or disconnected with the first terminal or the grounding terminal when rotating.

[0008] Furthermore, the isolating knife is connected to the first connecting terminal and the connection ends of the two are fixed, the isolating knife is rotatable around its fixed end, and the other end of the isolating knife can be connected or disconnected with the isolating switch when rotating.

[0009] Furthermore, a second terminal is provided on the top of the column circuit breaker, an outlet wall bushing is fixed on the top of the high-voltage chamber, and a first high-voltage lead is connected between the second terminal and the outlet wall bushing.

[0010] Furthermore, the isolating switch includes an operating rod, an insulating pull rod and an operating seat, the position of the operating seat is fixed, one end of the operating rod is hinged to the operating seat, and the other end is hinged to the insulating pull rod, and the top end of the insulating pull rod is hinged to the isolating knife.

[0011] Furthermore, the isolating switch includes a rotating shaft, the rotating shaft is mounted on the operating seat, the operating rod is fixed on the rotating shaft, and the operating rod is hinged to the operating seat through the rotating shaft.

[0012] Furthermore, the isolating switch includes a rotating shaft, the rotating shaft is mounted on a support plate, the isolating knife is fixed on the rotating shaft, one end of the isolating knife is hinged to the support plate through the rotating shaft, and a rotating handle is installed at one end of the rotating shaft.

[0013] Furthermore, the column-type circuit breaker and the isolating switch are in multiple groups, and there is one rotating shaft, which includes an insulating connecting rod and a metal shaft rod that are connected and spaced apart, and one end of the isolating knife is fixed on the metal shaft rod. One rotating shaft simultaneously adjusts multiple isolating knives to make the same rotational action.

[0014] Furthermore, the column circuit breaker, the isolating switch and the grounding terminal are simultaneously installed on the top or bottom of the high-voltage chamber.

[0015] Furthermore, a circuit breaker controller is fixed in the high-voltage chamber, and a plurality of the column-type circuit breakers are simultaneously mounted on the circuit breaker controller.

[0016] The beneficial effects of the utility model are:

[0017] 1. The connection end of the center column circuit breaker and the isolating knife of the utility model is open and closed, and the position of the other end of the isolating knife is fixed. In the isolating state, the isolating knife is close to the base direction. The isolating knife does not affect other insulation distances, and can be rotated to connect with the grounding terminal to realize the grounding function. Compared with the prior art, there is no need to equip the high-voltage room with a grounding knife. The isolating knife can realize the three functions of closing, isolating and grounding, saving the manufacturing cost and reducing the space occupied by the grounding knife, thereby saving the space volume of the high-voltage room. Under the condition that transportation is allowed, the voltage level of the substation can be increased to 60kV and above, so that the prefabricated substation can adapt to the application occasions with larger voltage levels;

[0018] 2. The high-voltage room, transformer and low-voltage room are installed and fixed together in sequence. Compared with the traditional prefabricated substation in which the high-voltage room and the low-voltage room are arranged on the same side of the transformer, the width of the prefabricated substation of the utility model is reduced, which is more convenient for transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural front view of the utility model;

[0020] Figure 2 It is a structural top view of the utility model;

[0021] Figure 3 This is an installation method of the current transformer in the utility model;

[0022] Figure 4 This is another structural front view of the utility model;

[0023] Figure 5 It is another structural top view of the utility model;

[0024] Figure 6 It is a front view of an inverted center column type circuit breaker of the utility model.

[0025] In the figure: 1. high-voltage room; 2. transformer; 3. low-voltage room; 4. column circuit breaker; 401. insulating column; 402. vacuum bubble; 5. support rod; 6. grounding terminal; 7. first terminal; 8. isolating knife; 9. closing station; 10. grounding station; 11. isolating station; 12. circuit breaker controller; 13. base; 14. second terminal; 15. outlet wall bushing; 16. first high-voltage lead; 17. current transformer; 18. high-voltage bushing; 19. side wall; 20. high-voltage winding; 21. second high-voltage lead; 22. operating rod; 23. insulating pull rod; 24. operating seat; 25. rotating shaft; 26. rotating handle; 27. support plate; 28. insulating connecting rod; 29. ​​metal shaft; 30. insulating pillar; 31. oil tank. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clearly understood, the utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0027] Example 1

[0028] The present embodiment provides a prefabricated substation equipped with a 60kV or higher column-type circuit breaker, comprising a high-voltage chamber 1, a transformer 2 and a low-voltage chamber 3. A column-type circuit breaker 4, a disconnector and a grounding terminal 6 are fixed in the high-voltage chamber 1. A first wiring terminal 7 is provided on the column-type circuit breaker 4, and an isolating knife 8 is provided on the disconnector. The isolating knife 8 is connected to the first wiring terminal 7 and the connection ends of the two are fixed. The isolating knife 8 can rotate with its fixed end as the center, and the other end of the isolating knife 8 can be connected or disconnected with the disconnector when rotating.

[0029] The connection end of the isolating knife 8 and the column type circuit breaker 4 is fixed, and the other end of the isolating knife 8 is open and closed. At this time, the isolating knife 8 has only two states: closed and isolated. A grounding knife (not shown in the figure) is provided in the high-voltage chamber 1 for connecting or disconnecting the grounding terminal 6. The use of the column type circuit breaker 4 can reduce the volume of the high-voltage chamber 1.

[0030] Example 2

[0031] like Figure 1-6 As shown, this embodiment provides a prefabricated substation equipped with a 60kV and above column circuit breaker, including a high-voltage chamber 1, a transformer 2 and a low-voltage chamber 3. A column circuit breaker 4, a disconnector and a grounding terminal 6 are fixed in the high-voltage chamber 1. A first terminal 7 is provided on the column circuit breaker 4, and an isolating knife 8 is provided on the disconnector. The isolating knife 8 is connected to the disconnector and the connection position of the two is hinged. The isolating knife 8 can rotate around its hinged end. When rotating, the other end of the isolating knife 8 can be connected or disconnected with the first terminal 7 or the grounding terminal 6.

[0032] The high-voltage chamber 1, transformer 2 and low-voltage chamber 3 are first integrated in the factory and then transported to the site for installation.

[0033] Different from Example 1, in this embodiment, the connection end of the column circuit breaker 4 and the isolating knife 8 is open and closed, and the other end of the isolating knife 8 is fixed. In the isolated state, the isolating knife 8 is close to the base 13. The isolating knife 8 does not affect other insulation distances and can be rotated to connect with the grounding terminal 6 to achieve the grounding function. Therefore, there is no need to equip the high-voltage chamber 1 with a grounding knife. The isolating knife 8 can achieve grounding, saving manufacturing costs and reducing the space occupied by the grounding knife, thereby saving the space volume of the high-voltage chamber 1. Under conditions where transportation is permitted, the voltage level of the substation can be increased to 60kV and above, so that the prefabricated substation can adapt to applications with larger voltage levels.

[0034] Therefore, the isolating knife 8 has three positions. The connection position between the isolating knife 8 and the first terminal 7 is recorded as the closing position 9, the connection position between the isolating knife 8 and the grounding terminal 6 is recorded as the grounding position 10, and the position of the isolating knife 8 between the grounding terminal 6 and the first terminal 7 is recorded as the isolation position 11. The isolating knife 8 is in an isolated state when it is neither connected to the first terminal 7 nor the grounding terminal 6.

[0035] A circuit breaker controller 12 is installed at the bottom of the column type circuit breaker 4. The column type circuit breaker 4 includes an insulating column 401. A vacuum bubble 402 is provided in the middle of the insulating column 401. The first terminal 7 is provided in the middle of the insulating column 401. The second terminal 14 is provided at the top of the insulating column 401. The first terminal 7 and the grounding terminal 6 are located on the circumference of the isolating knife 8. The isolating knife 8 is rotatably connected to the first terminal 7 or the grounding terminal 6 with its fixed end as the rotation center.

[0036] Furthermore, the column circuit breaker 4, the isolating switch and the grounding terminal 6 are all mounted on the same base 13, as shown in FIG. Figure 6 As shown, the base 13 can be fixed on the top or bottom of the high-voltage chamber 1, and the column-type circuit breaker 4 can be installed upright or inverted.

[0037] Furthermore, the transformer 2 is installed between the high-voltage chamber 1 and the low-voltage chamber 3. The high-voltage chamber 1, the transformer 2 and the low-voltage chamber 3 are installed and fixed together in sequence. Compared with the traditional prefabricated substation in which the high-voltage chamber 1 and the low-voltage chamber 3 are arranged on the same side of the transformer 2, the width of the prefabricated substation in this embodiment is reduced, which is more convenient for transportation.

[0038] Furthermore, a second terminal 14 is provided on the top of the column circuit breaker 4, an outlet wall bushing 15 is fixed on the top of the high-voltage chamber 1, and a first high-voltage lead 16 is connected between the second terminal 14 and the outlet wall bushing 15.

[0039] The high-voltage outgoing lines in the prior art all adopt the bottom cable outgoing line method. When the transmission line is an overhead line type, the outgoing lines need to be re-leaded to the transmission tower on the top of the substation after the bottom outgoing lines, which increases the lead-in process. However, this embodiment pre-sets the high-voltage outgoing lines of the prefabricated substation as the top outgoing lines. Compared with the traditional bottom cable threading, it saves the lead-in material, reduces the cost of the lead-out cable and the cost of the lead-in line jumper, and further reduces the investment cost of the wind power / photovoltaic power station.

[0040] Furthermore, the transformer 2 is an oil-immersed transformer 2, a current transformer 17 is fixed in the oil tank 31 of the transformer 2, a high-voltage bushing 18 is fixed on the transformer 2, the high-voltage bushing 18 is arranged in the high-voltage chamber 1, one end of the high-voltage bushing 18 is electrically connected to the isolating knife 8, and the other end is inserted into the oil tank 31 of the transformer 2 and electrically connected to the current transformer 17.

[0041] In the prior art, a separate space needs to be set up in the transformer 2 to accommodate the current transformer 17. Different from the prior art, the current transformer 17 of this embodiment is directly fixed in the oil tank 31 of the oil-immersed transformer 2. The transformer 2 does not need to set up an additional space to accommodate the current transformer 17, which reduces the manufacturing cost and further saves the volume of the transformer 2.

[0042] The high-voltage chamber 1 and the oil tank 31 are fixedly connected, and the side wall 19 of the oil tank 31 where the high-voltage bushing 18 is located protrudes from the surface of the transformer 2, and the protruding side wall 19 extends into the high-voltage chamber 1, further reducing the combined volume of the high-voltage chamber 1 and the transformer 2. The top view of the protruding side wall 19 is trapezoidal, and the side wall 19 extends into and is fixed in the high-voltage chamber 1.

[0043] like Figure 3As shown, a high voltage winding 20 is fixed in the oil tank 31, and a second high voltage lead 21 is connected between the high voltage winding 20 and the high voltage bushing 18, and the second high voltage lead 21 passes through the current transformer 17, or as shown in FIG. Figure 1 As shown, one end of the high voltage bushing 18 directly passes through and is connected to the current transformer 17 .

[0044] Example 3

[0045] like Figure 1 and 2 As shown, this embodiment provides a prefabricated substation equipped with a column circuit breaker of 60kV and above. On the basis of Embodiment 2, the isolating switch includes an operating rod 22, an insulating rod 23 and an operating seat 24. The position of the operating seat 24 is fixed. One end of the operating rod 22 is hinged to the operating seat 24, and the other end is hinged to the insulating rod 23. The top end of the insulating rod 23 is hinged to the isolating knife 8. The isolating switch also includes a support rod 5, which is fixed to an insulating support 30. The insulating support 30 is fixed in the high-voltage chamber 1. The support rod 5 is hinged to one end of the isolating knife 8, and its hinged position is the end rotation position of the isolating knife 8.

[0046] The operating seat 24 is fixed on the base 13, and the isolating knife 8 realizes the three functions of closing, isolating and grounding by rotation. The rotation of the isolating knife 8 is realized in the following way: turning the operating rod 22, the operating rod 22 drives the insulating pull rod 23 to move, and the insulating pull rod 23 then drives the isolating knife 8 to rotate with its fixed end as the rotation center, thereby realizing the connection between the isolating knife 8 and different terminals, and then realizing the different functions of the isolating knife 8.

[0047] The isolating switch includes a rotating shaft 25 , which is mounted on an operating seat 24 , an operating rod 22 is fixed on the rotating shaft 25 , and the operating rod 22 is hinged to the operating seat 24 via the rotating shaft 25 . The rotating shaft 25 drives the operating rod 22 to rotate, thereby realizing the rotation of the isolating knife 8 .

[0048] like Figure 2 As shown, in the high-voltage chamber 1, there are multiple groups of column circuit breakers 4 and disconnectors, but there is only one rotating shaft 25. One rotating shaft 25 can adjust multiple disconnecting knives 8 to make the same rotational motion at the same time, and a rotating handle 26 is installed at one end of the rotating shaft 25. One rotating shaft 25 is used to control multiple disconnecting knives 8 at the same time, and the rotating handle 26 is used to control the rotation position of the disconnecting knives 8, so as to realize the mutual conversion between the three functions of closing, disconnecting and grounding.

[0049] The plurality of column type circuit breakers 4 are controlled by one circuit breaker controller 12 , and the plurality of column type circuit breakers 4 are simultaneously mounted on the circuit breaker controller 12 .

[0050] Example 4

[0051] like Figure 4-6As shown, this embodiment provides a prefabricated substation equipped with a 60kV level and above column circuit breaker. On the basis of Example 2, the disconnector includes a rotating shaft 25, the rotating shaft 25 is installed on the support plate 27, the isolating knife 8 is fixed on the rotating shaft 25, one end of the isolating knife 8 is hinged to the support plate 27 through the rotating shaft 25, and a rotating handle 26 is installed at one end of the rotating shaft 25.

[0052] The insulating pull rod 23 itself occupies space, and it also takes up a lot of space when it is in motion. However, this embodiment omits components such as the operating rod 22, the insulating pull rod 23, and the operating seat 24, and directly changes the rotating shaft 25 to the position of the rotation center of the isolation knife 8. When the rotating handle 26 is rotated, the rotating shaft 25 can directly drive the isolation knife 8 to rotate, thereby realizing the three functions of closing, isolating and grounding the isolation knife 8. This embodiment makes full use of the space of the high-voltage chamber 1, and further saves the space and motion space originally required by components such as the operating rod 22, the insulating pull rod 23, and the operating seat 24, which is more convenient for the transportation of the prefabricated substation.

[0053] like Figure 5 As shown, the column circuit breaker 4 and the isolating switch are multiple groups, and there is one rotating shaft 25. The rotating shaft 25 includes an insulating connecting rod 28 and a metal shaft 29 that are connected and spaced apart. One end of the isolating knife 8 is fixed on the metal shaft 29. One rotating shaft 25 simultaneously adjusts multiple isolating knives 8 to make the same rotation action.

[0054] The isolating knife 8 is fixedly connected to the metal shaft 29, and the metal shafts 29 on multiple isolating knives 8 are fixed together by insulating connecting rods 28. When the rotating handle 26 is operated, multiple insulating connecting rods 28, metal shafts 29 and isolating knives 8 will rotate together with the rotating handle 26, so that multiple isolating knives 8 are in the closing position 9, the isolation position 11 or the grounding position 10 at the same time.

[0055] One end of the rotating shaft 25 is mounted on the support plate 27, and the other end is mounted on the insulating support column 30. The plurality of column type circuit breakers 4 are controlled by a circuit breaker controller 12, and the plurality of column type circuit breakers 4 are mounted on the circuit breaker controller 12 at the same time.

[0056] The circuit breaker controller 12 is installed at the end or middle of the column circuit breaker 4; Figure 4 and Figure 6 When the circuit breaker controller 12 is installed at one end of the column circuit breaker 4, the other end of the column circuit breaker 4 is provided with a second terminal 14, and the first terminal 7 is provided in the middle of the column circuit breaker 4; in order to meet other installation requirements, the circuit breaker controller 12 can also be installed in the middle of the column circuit breaker 4, at this time, the first terminal 7 is provided at one end of the column circuit breaker 4, and the other end of the column circuit breaker 4 is provided with a second terminal 14.

[0057] In this embodiment, the rotating shaft 25 is directly arranged at the rotation center position of the isolating knife 8, and the isolating knife 8 is driven to rotate by the rotating handle 26, thereby eliminating the conventional insulating rod 23, which not only saves the space occupied by the insulating rod 23 itself, but also saves the activity space of the insulating rod 23 when it is in motion, thereby reducing the overall size of the high-voltage chamber 1, thereby reducing the overall volume of the prefabricated substation, so that the voltage level of the prefabricated substation can be higher.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall fall within the protection scope of the present invention.

Claims

1. A prefabricated substation equipped with 60kV and above column type circuit breakers, characterized in that: The invention comprises a high-voltage chamber (1), a transformer (2) and a low-voltage chamber (3); a column-type circuit breaker (4), an isolating switch and a grounding terminal (6) are fixed in the high-voltage chamber (1); a first wiring terminal (7) is arranged on the column-type circuit breaker (4); an isolating knife (8) is arranged on the isolating switch; one end of the isolating knife (8) can be connected or disconnected with the isolating switch, and the other end can be connected or disconnected with the first wiring terminal (7) or the grounding terminal (6); one end of the isolating knife (8) is fixed, and the isolating knife (8) can rotate around its fixed end.

2. A prefabricated substation equipped with a 60kV or higher column type circuit breaker according to claim 1, characterized in that: The isolating knife (8) is connected to the isolating switch and the connection position of the two is hinged. The isolating knife (8) can rotate around its hinged end. When the isolating knife (8) rotates, the other end can be connected or disconnected with the first terminal (7) or the grounding terminal (6).

3. A prefabricated substation equipped with 60kV and above column type circuit breakers according to claim 1, characterized in that: A second wiring terminal (14) is provided on the top of the column-type circuit breaker (4), an outlet wall bushing (15) is fixed on the top of the high-voltage chamber (1), and a first high-voltage lead (16) is connected between the second wiring terminal (14) and the outlet wall bushing (15).

4. A prefabricated substation equipped with a 60kV or higher column type circuit breaker according to claim 1, characterized in that: The isolating switch comprises an operating rod (22), an insulating pull rod (23) and an operating seat (24); the position of the operating seat (24) is fixed; one end of the operating rod (22) is hinged to the operating seat (24), and the other end is hinged to the insulating pull rod (23); the top end of the insulating pull rod (23) is hinged to the isolating knife (8); the isolating switch also comprises a rotating shaft (25), the rotating shaft (25) is mounted on the operating seat (24), the operating rod (22) is fixed on the rotating shaft (25), and the operating rod (22) is hinged to the operating seat (24) via the rotating shaft (25).

5. A prefabricated substation equipped with 60kV and above column type circuit breakers according to claim 1, characterized in that: The isolating switch comprises a rotating shaft (25), the rotating shaft (25) being mounted on a support plate (27), the isolating knife (8) being fixed on the rotating shaft (25), and one end of the isolating knife (8) being hinged to the support plate (27) via the rotating shaft (25).

6. A prefabricated substation equipped with 60kV and above column type circuit breakers according to claim 5, characterized in that: The column-type circuit breaker (4) and the isolating switch are in multiple groups, the rotating shaft (25) is one, the rotating shaft (25) comprises an insulating connecting rod (28) and a metal shaft (29) which are spaced and connected, one end of the isolating knife (8) is fixed on the metal shaft (29), and the one rotating shaft (25) simultaneously adjusts multiple isolating knives (8) to perform the same rotational action.

7. A prefabricated substation equipped with 60kV and above column type circuit breakers according to claim 1, characterized in that: The column-type circuit breaker (4), the isolating switch and the grounding terminal (6) are simultaneously installed on the top or bottom of the high-voltage chamber (1).

8. A prefabricated substation equipped with 60kV and above column type circuit breakers according to claim 1, characterized in that: A circuit breaker controller (12) is fixed in the high-voltage chamber (1), and a plurality of column-type circuit breakers (4) are simultaneously mounted on the circuit breaker controller (12).

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