Wiring assembly and transformer substation

Abstract

The utility model discloses a wiring assembly and a transformer station, and relates to the transformer station technology field, the wiring assembly is applied to a main transformer, the main transformer and a high voltage chamber are arranged at intervals, the main transformer is provided with a reduced bus bridge, the height from the reduced bus bridge to the ground is a first height, the wiring assembly comprises a grounding wire hanging point and a grounding down lead, the ground wire hanging point is arranged on the outer wall of the high-voltage chamber, the height from the ground wire hanging point to the ground is a second height, and the second height is lower than the first height; the grounding wire hanging point is used for being electrically connected with a grounding wire so as to be grounded. The first end of the grounding down lead is electrically connected with the low-change bus bridge, and the second end of the grounding down lead is electrically connected with the grounding wire hanging point. According to the utility model, the ground wire hanging point is separated from the low-voltage bus bridge, the ground wire hanging point is arranged on the outer wall of the high-voltage chamber, and the second height is lower than the first height, so that the requirement of independently arranging the ground wire hanging point is met, the ground wire hanging point is convenient to operate, and convenience is provided for operation and maintenance.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer substations, in particular to a wiring assembly and a transformer substation. Background Art

[0002] After a power outage, a substation's main transformer often requires a grounding wire to be installed on the busbar bridge where the main transformer is lowered. Conventional, older substations lack dedicated grounding wire installation points on the busbar bridge, often using the arrester down conductor as a grounding wire. Repeated installation of the grounding wire can cause the arrester down conductor to deform or loosen. The China Southern Power Grid Co., Ltd.'s 2020 anti-accident measures explicitly mandate that "grounding wire installation points reserved for the main transformer's busbar bridge must be independently installed and staggered. Arrester down conductors must not be used to achieve a suspended state below the grounding installation point."

[0003] Since the Southern Power Grid's anti-accident measures became clear, independent grounding wire hanging points have been installed on the busbar bridge in newly built substations or main transformer replacement projects. However, since newly built substations in Guangzhou are primarily indoor stations, the distance between the main transformer and the wall bushing is short, and the installation space of the busbar bridge is relatively tight, making the installation of independent grounding wire hanging points more difficult. Therefore, in most cases, a copper busbar is directly installed on the busbar bridge as a grounding wire hanging point. However, because the busbar bridge is almost always 4.5 meters high, this adds difficulty and inconvenience to the actual operation of hanging the ground wire, and even requires additional movable steps to hang the ground wire.

[0004] Therefore, a new type of wiring assembly is urgently needed to solve the problem that copper bars are directly installed on the busbar bridge as grounding wire hanging points in existing substations, which makes it difficult to hang grounding wires. Utility Model Content

[0005] The main purpose of the utility model is to provide a wiring assembly and a substation, aiming to solve the problem in existing substations that copper bars are directly installed on busbar bridges as grounding wire hanging points, which makes it difficult to hang grounding wires.

[0006] To achieve the above-mentioned purpose, the wiring assembly proposed in the present invention is applied to the main transformer, which is arranged at a distance from the high-voltage chamber. The main transformer has a low-voltage busbar bridge, and the height of the low-voltage busbar bridge from the ground is a first height. The wiring assembly includes a grounding wire hanging point and a grounding down lead. The grounding wire hanging point is arranged on the outer wall of the high-voltage chamber, and the height of the grounding wire hanging point from the ground is a second height, which is lower than the first height; the grounding wire hanging point is used to be electrically connected to the grounding wire to ground itself; the first end of the grounding down lead is electrically connected to the low-voltage busbar bridge, and the second end of the grounding down lead is electrically connected to the grounding wire hanging point.

[0007] In one embodiment, the wiring assembly further includes a support structure, which is arranged on the outer wall of the high-voltage chamber; the outer periphery of the grounding down conductor is led down along the outer wall of the high-voltage chamber and installed on the support structure.

[0008] In one embodiment, the outer periphery of the grounding down conductor is provided with an insulating sleeve; and / or the supporting structure is made of insulating material.

[0009] In one embodiment, the variable bus bridge has a three-phase main bus, which is used to transmit three-phase alternating current; the wiring assembly includes multiple grounding down conductors and multiple grounding wire hanging points, the first ends of the multiple grounding down conductors are electrically connected to each phase main bus in a one-to-one correspondence, and the second ends of the multiple grounding down conductors are electrically connected to the multiple grounding wire hanging points in a one-to-one correspondence.

[0010] In one embodiment, the support structure includes a plurality of groups of pillar assemblies arranged at intervals in the horizontal direction, and the pillar assemblies are arranged on the outer wall of the high-voltage chamber; the outer peripheries of a plurality of grounding down conductors are led down along the outer wall of the high-voltage chamber and installed one by one on the plurality of groups of pillar assemblies.

[0011] In one embodiment, each group of support assemblies includes a plurality of support insulators spaced apart in the vertical direction, and the support insulators are provided on the outer wall of the high-voltage chamber; the support insulators in each group of support assemblies are connected to corresponding grounding down conductors.

[0012] In one embodiment, the interval between two adjacent post insulators in each group of post assemblies is ≤1.2 m.

[0013] In one embodiment, the wiring assembly further includes a plurality of connecting members, which are fixed to the outer wall of the high-voltage chamber; and the support insulators are detachably connected to the connecting members.

[0014] In one embodiment, the second height is set to be ≥2.7 m.

[0015] The utility model also provides a transformer substation, comprising a high-voltage chamber, a main transformer and the above-mentioned wiring assembly.

[0016] The technical solution of the present invention adopts a wiring assembly, which is applied to a main transformer. The main transformer is spaced apart from the high-voltage chamber. The main transformer has a low-voltage bus bridge, and the height of the low-voltage bus bridge from the ground is a first height. The wiring assembly includes a grounding wire hanging point and a grounding down lead. The grounding wire hanging point is set on the outer wall of the high-voltage chamber, and the height of the grounding wire hanging point from the ground is a second height, which is lower than the first height; the grounding wire hanging point is used to be electrically connected to the grounding wire to ground itself; the first end of the grounding down lead is electrically connected to the low-voltage bus bridge, and the second end of the grounding down lead is electrically connected to the grounding wire hanging point.

[0017] The technical solution of the present invention is to separate the grounding wire hanging point from the lowered busbar bridge, and set the grounding wire hanging point on the outer wall of the high-voltage room, and make the second height lower than the first height. It not only meets the anti-accident measure requirements of independently setting the grounding wire hanging point, but also because the second height is lower than the first height, when the staff performs operations such as hanging the ground wire, there is no need to add additional movable steps to operate the 4.5m high busbar bridge. The grounding wire hanging point at the second height can be operated by standing on the ground, thereby reducing the difficulty of operating the grounding wire hanging point and providing convenience for operation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 A schematic structural diagram of an embodiment of a substation provided by the present utility model;

[0020] Figure 2 for Figure 1 View from center AA.

[0021] Description of Figure Numbers:

[0022] 1. Wiring assembly; 11. Grounding wire hanging point; 12. Grounding down conductor; 13. Pillar assembly; 131. Pillar insulator; 132. Wall bushing; 14. Connecting component; 2. Main transformer; 21. Transformer busbar bridge; 3. High-voltage room.

[0023] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0025] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0026] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] After a power outage, a substation's main transformer often requires a grounding wire to be installed on the busbar bridge where the main transformer is lowered. Conventional, older substations lack dedicated grounding wire installation points on the busbar bridge, often using the arrester down conductor as a grounding wire. Repeated installation of the grounding wire can cause the arrester down conductor to deform or loosen. The China Southern Power Grid Co., Ltd.'s 2020 anti-accident measures explicitly mandate that "grounding wire installation points reserved for the main transformer's busbar bridge must be independently installed and staggered. Arrester down conductors must not be used to achieve a suspended state below the grounding installation point."

[0028] Since the Southern Power Grid's anti-accident measures became clear, independent grounding wire hanging points have been installed on the busbar bridge in newly built substations or main transformer replacement projects. However, since newly built substations in Guangzhou are primarily indoor stations, the distance between the main transformer and the wall bushing is short, and the installation space of the busbar bridge is relatively tight, making the installation of independent grounding wire hanging points more difficult. Therefore, in most cases, a copper busbar is directly installed on the busbar bridge as a grounding wire hanging point. However, because the busbar bridge is almost always 4.5 meters high, this adds difficulty and inconvenience to the actual operation of hanging the ground wire, and even requires additional movable steps to hang the ground wire.

[0029] Therefore, a new type of wiring assembly is urgently needed to solve the problem that copper bars are directly installed on the busbar bridge as grounding wire hanging points in existing substations, which makes it difficult to hang grounding wires.

[0030] The utility model provides a wiring assembly.

[0031] See also Figure 1 and Figure 2 In one embodiment of the utility model, the wiring assembly 1 is applied to the main transformer 2, the main transformer 2 is spaced apart from the high-voltage chamber 3, the main transformer 2 has a lower busbar bridge 21, the height of the lower busbar bridge 21 from the ground is a first height, the wiring assembly 1 includes a grounding wire hanging point 11 and a grounding down conductor 12, the grounding wire hanging point 11 is set on the outer wall of the high-voltage chamber 3, the height of the grounding wire hanging point 11 from the ground is a second height, and the second height is lower than the first height; the grounding wire hanging point 11 is used to be electrically connected to the grounding wire to ground itself; the first end of the grounding down conductor 12 is electrically connected to the lower busbar bridge 21, and the second end of the grounding down conductor 12 is electrically connected to the grounding wire hanging point 11.

[0032] The technical solution of the present invention is to separate the grounding wire hanging point 11 from the lowered busbar bridge 21, and set the grounding wire hanging point 11 on the outer wall of the high-voltage chamber 3, and make the second height lower than the first height. It not only meets the anti-accident measure requirement of independently setting the grounding wire hanging point 11, but also because the second height is lower than the first height, when the staff performs operations such as hanging the ground wire, there is no need to add additional movable steps to operate the 4.5m high busbar bridge. The grounding wire hanging point 11 at the second height can be operated by standing on the ground, thereby reducing the difficulty of operating the grounding wire hanging point 11 and providing convenience for operation and maintenance.

[0033] Furthermore, to address the issue of how to support and secure the ground down conductor 12, in an embodiment of the present invention, the wiring assembly 1 further includes a support structure disposed on the outer wall of the high-voltage chamber 3. The outer periphery of the ground down conductor 12 is guided down along the outer wall of the high-voltage chamber 3 and mounted on the support structure. Thus, by utilizing the support structure to support and secure the outer periphery of the ground down conductor 12, problems such as shaking of the ground down conductor 12 and resulting in poor electrical connection are avoided.

[0034] Among them, in order to avoid safety hazards caused by leakage around the grounding down conductor 12, in an embodiment of the present utility model, as an optional implementation, an insulating sleeve is provided on the periphery of the grounding down conductor 12. In this way, by providing an insulating sleeve on the periphery of the grounding down conductor 12, the periphery of the grounding down conductor 12 is isolated from the electrical connection with external objects, thereby achieving an anti-leakage effect; further, the insulating sleeve can be set as a heat shrink sleeve, which has the property of shrinking when heated. After being provided on the periphery of the grounding down conductor 12, the heat shrink sleeve can be heated to shrink and tightly wrap the grounding down conductor 12. As another optional implementation, the support structure is made of insulating material. In this way, by using insulating material to make the support structure, the support structure is prevented from being conductive, thereby preventing the support structure from conducting the current of the grounding down conductor 12 to other objects, thereby achieving an anti-leakage effect.

[0035] In addition, in an embodiment of the present invention, the low-voltage busbar bridge 21 has a three-phase main busbar, which is used to transmit three-phase alternating current; the wiring assembly 1 includes multiple grounding down conductors 12 and multiple grounding wire hanging points 11, and the first ends of the multiple grounding down conductors 12 are electrically connected to each phase main busbar in a one-to-one correspondence, and the second ends of the multiple grounding down conductors 12 are electrically connected to the multiple grounding wire hanging points 11 in a one-to-one correspondence.

[0036] In this embodiment, three-phase AC power is transmitted separately via the three-phase main busbars. Therefore, multiple grounding down conductors 12 are electrically connected to each phase of the main busbar in a one-to-one correspondence. The second end of each grounding down conductor 12 is electrically connected to multiple grounding wire attachment points 11 in a one-to-one correspondence. This effectively prevents problems such as overheating and fusing caused by the combined conduction of multiple phases of current through a single grounding down conductor 12, thereby improving safety. Furthermore, the merging of different phases of AC power can lead to electromagnetic coupling. In this embodiment, the AC power in the three-phase main busbars is grounded separately, reducing the electromagnetic interference generated by this electromagnetic coupling.

[0037] Furthermore, in order to solve the problem of supporting and fixing multiple grounding down conductors 12, in the embodiment of the present utility model, please refer to Figure 2 The support structure includes multiple sets of support assemblies 13 arranged horizontally and spaced apart. The support assemblies 13 are installed on the outer wall of the high-voltage chamber 3. The outer periphery of multiple ground down conductors 12 is led down along the outer wall of the high-voltage chamber 3 and is installed one by one on the multiple sets of support assemblies 13. In this way, through the arrangement of multiple sets of support assemblies 13, each ground down conductor 12 can be supported and fixed by the corresponding support assembly 13, ensuring the stability of the electrical connection between the ground down conductor 12 and the outside world.

[0038] Furthermore, in order to solve the problem that the single grounding down conductor 12 is not well supported and fixed in the vertical direction, in the embodiment of the present utility model, please refer to Figure 2Each group of support assemblies 13 includes a plurality of support insulators 131 spaced apart in the vertical direction, and the support insulators 131 are arranged on the outer wall of the high-voltage chamber 3; the support insulators 131 in each group of support assemblies 13 are connected to the corresponding grounding down conductor 12.

[0039] In this embodiment, by utilizing the support insulators 131 in each group of support assemblies 13 to connect with the corresponding grounding down conductor 12, since each group of support insulators 131 is arranged at intervals in the vertical direction, a relatively sufficient fixing effect can be provided for the grounding down conductor 12 at various locations in the vertical direction.

[0040] The connection between the post insulator 131 and the grounding down conductor 12 can be achieved in a variety of optional ways. For example, a busbar connection fitting can be provided on the post insulator 131, and the grounding down conductor 12 can be connected to the busbar connection fitting. The grounding down conductor 12 can also be passed through the metal end of the bushing and connected to the post insulator 131. The grounding down conductor 12 can also be wound around the post insulator 131. The specific connection method between the post insulator 131 and the grounding down conductor 12 is not limited herein.

[0041] Also, see Figure 2 Each support assembly 13 may further include a wall bushing 132, which is disposed at the top of each support assembly 13 and penetrates the wall of the high-voltage chamber 3. The outer periphery of the grounding down conductor 12 is also connected to the wall bushing 132. In this way, the wall bushing 132 can also provide support and fixation for the grounding down conductor.

[0042] Because the grounding down conductor 12 can be affected by factors such as electrodynamic forces and torque under the action of alternating current, causing deformation and displacement, in order to prevent significant displacement of the grounding down conductor 12 under the action of alternating current, in the embodiment of the present invention, the spacing between two adjacent post insulators 131 in each set of post assemblies 13 is ≤ 1.2 m. Calculations show that supporting and securing the grounding down conductor 12 with post insulators 131 at intervals of 1.2 m or less along the grounding down conductor 12 effectively prevents displacement and deformation of the grounding down conductor 12, ensuring its stability. Preferably, the spacing between two adjacent post insulators 131 in each set of post assemblies 13 can be set to 0.8 to 1.0 m, thereby improving the uniformity of support and fixation across the grounding down conductor 12 and further preventing displacement of the grounding down conductor 12.

[0043] In order to avoid damage to the wall of the high voltage chamber 3 during the process of disassembling and replacing the support insulator 131, in the embodiment of the present utility model, please refer to Figure 2The wiring assembly 1 further includes a plurality of connecting members 14 fixed to the outer wall of the high-voltage chamber 3; the post insulators 131 are detachably connected to the connecting members 14. The arrangement of the connecting members 14 prevents direct contact between the post insulators 131 and the outer wall of the high-voltage chamber 3 during removal and replacement, thereby preventing damage to the wall of the high-voltage chamber 3 caused by the removal and installation of the post insulators 131.

[0044] The connecting member 14 can be configured as a steel member to ensure that the structural strength of the connecting member 14 meets the expected requirements. Figure 2 The connecting member 14 can also be set as a rod-shaped member, and a single rod-shaped member is respectively connected to the support insulators 131 in the multiple groups of support assemblies 13. This not only prevents the support insulators 131 from being directly installed on the outer wall of the high-voltage chamber 3, thereby preventing the wall from being damaged, but also uses the rod-shaped member to install the support insulators 131, which can facilitate positioning and installation, so that the support insulators 131 are installed in the same straight line, thereby improving the aesthetics.

[0045] Since the grounding wire hanging point 11 remains energized for a long time, it is necessary to solve the problem of how to prevent workers from accidentally touching the grounding wire hanging point 11 and causing electric shock. In the embodiment of the present utility model, the second height is set to ≥ 2.7m. In this way, since workers standing on the ground cannot reach the height of 2.7m even if they raise their arms, setting the second height to ≥ 2.7m can effectively prevent operators standing on the ground from accidentally touching the grounding wire hanging point 11, thereby reducing the possibility of accidental electric shock.

[0046] See also Figure 1 The present invention also provides a substation comprising a high-voltage chamber 3, a main transformer 2, and the wiring assembly 1 of the above-described embodiment. The specific structure of the wiring assembly 1 is similar to that of the above-described embodiment. Since the present substation utilizes all the technical solutions of all of the above-described embodiments, it at least possesses all the beneficial effects brought about by the technical solutions of the above-described embodiments, and therefore will not be further elaborated here.

[0047] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A wiring assembly, characterized in that: Applied to a main transformer, the main transformer is spaced apart from a high-voltage chamber, the main transformer has a lower busbar bridge, the height of the lower busbar bridge from the ground is a first height, and the wiring assembly includes: a grounding wire hanging point, the grounding wire hanging point being arranged on an outer wall of the high-voltage chamber, the grounding wire hanging point being at a second height from the ground, the second height being lower than the first height; the grounding wire hanging point being used to be electrically connected to the grounding wire so as to be grounded; A grounding down conductor, wherein the first end of the grounding down conductor is electrically connected to the lower busbar bridge, and the second end of the grounding down conductor is electrically connected to the grounding wire hanging point.

2. The wiring assembly according to claim 1, wherein: The wiring assembly further includes a support structure, wherein the support structure is arranged on an outer wall of the high-voltage chamber; The outer periphery of the grounding down conductor is led down along the outer wall of the high-voltage chamber and installed on the supporting structure.

3. The wiring assembly according to claim 2, wherein: The outer peripheral sleeve of the grounding down conductor is provided with an insulating sleeve; and / or the supporting structure is made of insulating material.

4. The wiring assembly according to claim 2, wherein: The variable-voltage bus bridge has a three-phase main bus, and the three-phase main bus is used to transmit three-phase alternating current; The wiring assembly includes multiple grounding down conductors and multiple grounding wire hanging points. The first ends of the multiple grounding down conductors are electrically connected to the main bus of each phase in a one-to-one correspondence, and the second ends of the multiple grounding down conductors are electrically connected to the multiple grounding wire hanging points in a one-to-one correspondence.

5. The wiring assembly according to claim 4, wherein: The support structure includes a plurality of pillar assemblies arranged at intervals in the horizontal direction, and the pillar assemblies are arranged on the outer wall of the high-pressure chamber; The outer peripheries of the plurality of grounding down conductors are led down along the outer wall of the high-voltage chamber and are installed one by one on the plurality of groups of support components.

6. The wiring assembly according to claim 5, wherein: Each group of the support assemblies includes a plurality of support insulators spaced apart in the vertical direction, and the support insulators are arranged on the outer wall of the high-voltage chamber; The post insulators in each group of the post assemblies are connected to the corresponding grounding down conductors.

7. The wiring assembly according to claim 6, wherein: The interval between two adjacent post insulators in each group of the post assemblies is ≤1.2m.

8. The terminal assembly according to claim 6, wherein: The wiring assembly further includes a plurality of connecting members, wherein the connecting members are fixed to the outer wall of the high-voltage chamber; The post insulator is detachably connected to the connecting member.

9. The junction assembly according to any one of claims 1 to 8, wherein: The second height is set to be ≥2.7m.

10. A substation, characterized in that: The utility model comprises a high-voltage chamber, a main transformer and a wiring assembly according to any one of claims 1 to 9.

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