New energy box transformer m-type busbar structure

Abstract

The utility model discloses a new energy box transformer m type busbar structure, especially be applicable to large capacity wind power box type substation low voltage unit, it includes A phase copper bar, B phase copper bar, C phase copper bar, A phase hangs and connects cable row, B phase hangs and connects cable row, C phase hangs and connects cable row, horizontal insulator, vertical insulator, and each phase copper bar includes the export copper bar I of upper and lower settings, export copper bar II, export copper bar III, and export copper bar I, export copper bar II, export copper bar III are connected with insulator fixed beam through horizontal insulator, wherein export copper bar I, export copper bar II, export copper bar III are arranged at interval after the lower end of bending, and constitute m shape from the side angle, and the arrangement of this kind of structure can greatly reduce the use amount of copper bar and auxiliary material, reduce the fixed point required by busbar etc. while reducing product cost, save the installation space, and reduce the cost.

Description

Technical Field

[0001] This utility model relates to a busbar structure for circuit breakers used in new energy prefabricated substations, specifically an M-type busbar structure for new energy prefabricated substations. Background Technology

[0002] Currently, in the assembly process of low-voltage unit copper busbars in large-capacity wind turbine box-type substations, the copper busbar at the lower port of the low-voltage circuit breaker is led out through a conductive copper busbar, and then connected to the cable through a busbar. The traditional busbar structure is as follows: Figure 1 As shown, this connection method has the following disadvantages: due to the busbar structure, the amount of copper busbar used is relatively large, resulting in higher costs; the overall span of the copper busbar is large, occupying more internal space and affecting the optimization of the low-voltage unit size; the loop resistance is relatively large, leading to higher temperature rise. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model provides an M-type busbar structure for new energy transformer substations, which improves the layout structure of the copper busbars, eliminates the busbar structure, reduces costs, and saves space.

[0004] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0005] A new energy prefabricated substation M-type busbar structure includes A-phase copper busbars, B-phase copper busbars, C-phase copper busbars, A-phase connecting cable busbars, B-phase connecting cable busbars, C-phase connecting cable busbars, horizontal insulators, and vertical insulators. Each phase copper busbar includes three lead-out copper busbars (I, II, and III) positioned vertically. Correspondingly, each phase also has three connecting cable busbars. The lower terminal of the low-voltage circuit breaker is horizontally positioned. One end of each of the A-phase, B-phase, and C-phase copper busbars is connected to the lower terminal of the low-voltage circuit breaker. The uppermost lead-out copper busbar (I) overlaps with the lower terminal of the low-voltage circuit breaker, bends downwards at a 90-degree angle, and then extends vertically downwards, its lower end connecting to the connecting cable busbar. The middle lead-out copper busbar (II) connects to the lower terminal of the low-voltage circuit breaker. After the lower terminals of the low-voltage circuit breaker are connected, the lower part is first bent downward at a 90-degree angle, then extended downward for a short distance before bending forward again, and then bent downward again. Its lower end is connected to the cable busbar. The lowermost copper busbar III is connected to the lower terminals of the low-voltage circuit breaker, then bent downward at a 90-degree angle, then bent forward, then extended forward for a short distance before bending downward again. Its lower end is connected to the cable busbar. Copper busbars I, II, and III are connected to the insulator fixing beam through horizontal insulators. The lower ends of copper busbars I, II, and III are spaced apart, forming an m-shape from the side view. Copper busbars I, II, and III are kept at a certain distance by bending to facilitate subsequent cable connection.

[0006] The last bend of the copper busbar III is connected to the circuit breaker mounting plate fixing beam via a vertical insulator.

[0007] The circuit breaker is fixed in the low-voltage unit by the circuit breaker mounting plate fixing beam. The insulator fixing beam is set in the low-voltage unit below the circuit breaker mounting plate fixing beam and is fixedly connected to the low-voltage unit frame.

[0008] Furthermore, the lower ends of copper busbar I, copper busbar II, and copper busbar III are arranged in a stepped pattern, with the lower end of copper busbar I being the lowest, which facilitates the connection of conventional wind power cables.

[0009] Furthermore, the lower half of both the A-phase and C-phase cable blocks extends outwards, with their connection terminals located on the outer side, increasing the insulation distance with the connection terminals of the B-phase cable block.

[0010] The beneficial effects of this utility model are as follows: This utility model changes the copper busbar output structure of the low-voltage unit of the new energy transformer box, adopts an M-type busbar structure, eliminates the old busbar unit, and has a clever structural design layout. The M-type layout facilitates the subsequent connection of different numbers of cables, ensures the insulation distance, reduces the amount of copper busbar and auxiliary materials used, improves the temperature rise performance of the low-voltage unit copper busbar, saves the original busbar installation space, and reduces costs. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the copper busbar layout of a conventional wind turbine transformer low-voltage unit, from left to right: front view, side view, and rear view.

[0012] Figure 2 This is a side view structural schematic diagram of the present invention;

[0013] Figure 3 This is a schematic diagram of the main structure of this utility model;

[0014] Figure 4 This is a schematic diagram of the rear view structure of this utility model.

[0015] 1. Phase A copper busbar, 2. Phase B copper busbar, 3. Phase C copper busbar, 4. Phase A cable busbar, 5. Phase B cable busbar, 6. Phase C cable busbar, 7. Horizontal insulator, 8. Vertical insulator, 9. Circuit breaker mounting plate fixing beam, 10. Insulator fixing beam, 11. Lead-out copper busbar I, 12. Lead-out copper busbar II, 13. Lead-out copper busbar III, 14. Low-voltage circuit breaker, 15. Lower terminal. Detailed Implementation

[0016] The following will be combined with the appendix Figure 2-4This invention provides a clear and complete description of the technical solution of a new energy transformer substation with an M-type busbar structure. It includes an A-phase copper busbar 1, a B-phase copper busbar 2, a C-phase copper busbar 3, an A-phase connecting cable busbar 4, a B-phase connecting cable busbar 5, and a C-phase connecting cable busbar 6, a horizontal insulator 7, and a vertical insulator 8. Each phase copper busbar includes three vertically arranged lead-out copper busbars: I11, II12, and III13. Correspondingly, each phase has three connecting cable busbars. The lower terminal 15 of the low-voltage circuit breaker 14 is horizontally positioned. One end of each of the A-phase, B-phase, and C-phase copper busbars is connected to the lower terminal 15 of the low-voltage circuit breaker. The uppermost lead-out copper busbar I11 overlaps with the lower terminal of the low-voltage circuit breaker, bends downwards at a 90-degree angle, and then extends vertically downwards, with its lower end connected to the connecting cable busbar. After the middle copper busbar II12 overlaps with the lower terminal of the low-voltage circuit breaker, it first bends downward at a 90-degree angle, extends downward for a while, then bends forward, and then bends downward again. Its lower end is connected to the cable busbar. After the bottom copper busbar III13 overlaps with the lower terminal of the low-voltage circuit breaker, it first bends downward at a 90-degree angle, then bends forward, extends forward for a while, and then bends downward again. Its lower end is connected to the cable busbar. Copper busbars I11, II12, and III13 are connected to the insulator fixing beam 10 through the horizontal insulator 7. The lower ends of copper busbars I11, II12, and III13 are arranged at intervals, forming an m-shape from the side view. Copper busbars I11, II12, and III13 are kept at a certain distance by bending to facilitate subsequent cable hanging.

[0017] The copper busbar Ⅲ13 is connected to the circuit breaker mounting plate fixing beam 9 above the last bend via a vertical insulator 8.

[0018] The low-voltage circuit breaker is installed and fixed in the low-voltage unit by the circuit breaker mounting plate fixing beam 9, and the insulator fixing beam 10 is set in the low-voltage unit below the circuit breaker mounting plate fixing beam and is fixedly connected to the low-voltage unit frame.

[0019] Furthermore, the lower ends of copper busbar I11, copper busbar II12, and copper busbar III13 are arranged in a stepped pattern, with the lower end of copper busbar I11 being the lowest, which facilitates the connection of conventional wind power cables.

[0020] Furthermore, the lower halves of both phase A cable block 4 and phase C cable block 6 extend outwards, with their connection terminals located on the outer side, increasing the insulation distance with the connection terminals of phase B cable block 5.

[0021] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model. These improvements should also be considered within the scope of protection of the present utility model without creative effort.

Claims

1. A new energy box variable m type busbar structure, characterized in that: It includes phase A copper busbars, phase B copper busbars, phase C copper busbars, phase A connecting cable busbars, phase B connecting cable busbars, phase C connecting cable busbars, horizontal insulators, and vertical insulators. Each phase copper busbar includes three lead-out copper busbars (I, II, and III) positioned vertically. Correspondingly, each phase also has three connecting cable busbars. The lower terminal of the low-voltage circuit breaker is horizontally positioned. One end of each phase A, B, and C copper busbar is connected to the lower terminal of the low-voltage circuit breaker. The uppermost lead-out copper busbar (I) overlaps with the lower terminal of the low-voltage circuit breaker, then bends downwards at a 90-degree angle, and then extends vertically downwards, its lower end connecting to the connecting cable busbar. Then, the middle copper busbar II overlaps with the lower terminal of the low-voltage circuit breaker, bends downward at a 90-degree angle, extends downward for a distance, bends forward, and then bends downward again. Its lower end is connected to the hanging cable busbar. The bottom copper busbar III overlaps with the lower terminal of the low-voltage circuit breaker, bends downward at a 90-degree angle, then bends forward, extends forward for a distance, and then bends downward again. Its lower end is connected to the hanging cable busbar. Copper busbars I, II, and III are connected to the insulator fixing beam through horizontal insulators. The lower ends of copper busbars I, II, and III are arranged at intervals, forming an m-shape from the side view.

2. The new energy box variable m type busbar structure according to claim 1, characterized in that: The last bend of the copper busbar III is connected to the circuit breaker mounting plate fixing beam via a vertical insulator.

3. The new energy box variable m type busbar structure according to claim 2, characterized in that: The circuit breaker is fixed in the low-voltage unit by the circuit breaker mounting plate fixing beam. The insulator fixing beam is set in the low-voltage unit below the circuit breaker mounting plate fixing beam and is fixedly connected to the low-voltage unit frame.

4. The new energy box variable m type busbar structure according to claim 1, characterized in that: The lower ends of copper busbar I, copper busbar II, and copper busbar III are arranged in a stepped pattern, with the lower end of copper busbar I being the lowest.

5. The new energy box variable m type busbar structure according to claim 1, characterized in that: The lower half of both the A-phase and C-phase cable trays extends outwards, with their connection terminals located on the outer side.

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