CN212336874U - Arch cross arm tower type structure of +/-1100 kV direct current line and grounding electrode line on same tower - Google Patents
Arch cross arm tower type structure of +/-1100 kV direct current line and grounding electrode line on same tower Download PDFInfo
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- CN212336874U CN212336874U CN202020763202.2U CN202020763202U CN212336874U CN 212336874 U CN212336874 U CN 212336874U CN 202020763202 U CN202020763202 U CN 202020763202U CN 212336874 U CN212336874 U CN 212336874U
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Abstract
The utility model discloses a +/-1100 kV direct current circuit and earthing pole circuit are with arch cross arm tower type structure of tower comprises +/-1100 kV direct current circuit tower head, earthing pole circuit cross arm, body of the tower and tower leg. The +/-1100 kV direct-current line tower head is positioned at the top of the structure and consists of a +/-1100 kV direct-current line cross arm and a ground wire support positioned on the upper plane of the cross arm; the grounding electrode circuit cross arm is located at the middle position of the structure and connected with the tower body. By erecting the +/-1100 kV direct-current line and the grounding electrode line on the same iron tower, the large investment caused by independently erecting the +/-1100 kV direct-current line and the grounding electrode line on different iron tower structures in the traditional scheme is avoided, meanwhile, the electric clearance characteristics of the +/-1100 kV direct-current line lead are fully utilized, the arched cross arm structure is adopted, and the tower height is reduced to the maximum extent. The utility model discloses can effectively reduce iron tower steel and base material quantity, reduce the column foot and take up an area of, gain good economic benefits and social, can be in the starting point and the terminal point district section wide application of special high voltage direct current transmission engineering.
Description
Technical Field
The utility model relates to a transmission line engineering iron tower field especially relates to the arch cross arm tower type structure of +/-1100 kV direct current circuit and earthing pole circuit with the tower.
Background
In an extra-high voltage direct current transmission project, two power lines are usually arranged at a starting point and an end point of the project respectively, one power line is an extra-high voltage direct current transmission line, and the other power line is a grounding electrode line matched with a transmitting end converter station. For an extra-high voltage direct current transmission project with a voltage grade of +/-1100 kV, according to the traditional method, a +/-1100 kV direct current transmission line and a grounding electrode line need to be planned and designed according to different paths, so that not only are line corridors planned respectively for the two lines to occupy permanent land of a tower footing required, but also respective iron towers and foundations need to be designed respectively, and the overall economy of the project is poor. If a multifunctional iron tower capable of supporting a +/-1100 kV direct-current line and a grounding electrode line simultaneously can be designed, land resources can be greatly saved, and remarkable economic benefits are generated.
Therefore, it is a problem worthy of research and solution by those skilled in the art to develop a tower type suitable for the common tower of the ± 1100kV dc line and the grounding electrode line.
SUMMERY OF THE UTILITY MODEL
The utility model provides a 1100kV direct current circuit and earthing pole circuit can satisfy the requirement of setting up 1100kV direct current circuit and earthing line on same iron tower with the arch cross arm tower type structure of tower, practices thrift the circuit corridor, reduces iron tower area, gains better economy and social.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an arched cross arm tower-shaped structure with the same tower of a +/-1100 kV direct-current line and a grounding electrode line comprises a tower head of the +/-1100 kV direct-current line, a grounding electrode line cross arm, a tower body and tower legs; the +/-1100 kV direct-current line tower head is positioned at the top of the tower body, and the +/-1100 kV direct-current line tower head comprises a direct-current line cross arm and a ground wire bracket positioned on the upper plane of the cross arm; the grounding electrode circuit cross arm is positioned in the middle of the tower body; the lower end of the tower body is connected with the tower legs;
the +/-1100 kV direct-current line cross arm is connected with a direct-current line insulator string of a direct-current line lead through insulator string suspension points at the root part and the end part of the direct-current line cross arm, and the grounding electrode line cross arm is connected with the insulator string of the grounding electrode line lead through an insulator string suspension point at the outer end of the grounding electrode line cross arm.
The direct current line cross arm is of an arch structure, the height of the root of the direct current line cross arm is the same as that of the lower plane of the end part of the direct current line cross arm, the middle of the direct current line cross arm is arched upwards, and the lower plane of the arched position is higher than the lower planes of the root and the end part of the arch structure.
Furthermore, the two direct current line insulator strings are V-shaped, and the included angle is 100-110 degrees.
Furthermore, a common ground wire is hung at the top end of one side of the ground wire support, and an OPGW optical cable is hung at the top end of the other side of the ground wire support.
Furthermore, the vertical distance between the wire suspension point of the direct current circuit cross arm and the wire suspension point of the grounding electrode circuit is larger than 13 m.
Furthermore, the number of the direct current circuit cross arms, the ground wire supports and the grounding electrode circuit cross arms is two, and the two direct current circuit cross arms, the two ground wire supports and the two grounding electrode circuit cross arms are respectively symmetrical left and right relative to the center of the tower body.
Further, the direct current circuit cross arm and the grounding electrode circuit cross arm are both connected with the tower body through bolts; the ground wire support is connected with the direct current circuit cross arm through a bolt.
Compared with the prior art, the utility model discloses following technological effect has:
the utility model discloses an arch cross arm tower type structure of 1100kV direct current circuit and earthing pole circuit with the tower has realized erectting 1100kV direct current circuit and earthing pole circuit on same iron tower to replaced and erect the mode of 1100kV direct current circuit and earthing pole circuit respectively on different iron towers in the traditional scheme, saved and erect required circuit corridor of earthing pole circuit alone, the column foot takes up an area of, iron tower steel and base material, national natural resources has been practiced thrift by a wide margin, natural environment has been protected. The line load and the cross arm size of the grounding electrode line are much smaller than those of the +/-1100 kV direct current line, so that the same tower erection scheme of the grounding electrode line and the +/-1100 kV direct current line is smaller than that of the +/-1100 kV direct current line, the tower load increase proportion is small, and the steel material consumption and the base material consumption increased by the tower are far smaller than those required for erecting the grounding electrode line independently. Obviously, the same tower erection scheme of the +/-1100 kV direct-current line and the grounding electrode line is adopted, so that the tower and the base material quantity can be greatly saved, and the economic benefit is remarkable.
Furthermore, according to different requirements of the direct current line and the grounding electrode line on the ground distance, the direct current line is large in the ground distance, the grounding electrode line is small in the ground distance, in order to reduce the tower height and the tower weight as much as possible, the grounding electrode line cross arm of the suspension lead is arranged below the direct current line cross arm, meanwhile, in order to meet the electrical performance requirement, the vertical distance between the grounding electrode line cross arm and the direct current line cross arm meets the requirement of a specific distance through optimized structural arrangement, and therefore the grounding electrode line lead and the direct current line lead can meet the requirement of the spatial distance.
The utility model discloses a +/-1100 kV direct current circuit and earthing pole circuit are with arch cross arm tower type structure of tower, according to the electric clearance characteristics and the insulation configuration of wire, the wire is greater than insulator chain vertical height to the electric clearance value of cross arm, in order to effectively utilize the tower height, the utility model discloses a +/-1100 kV direct current circuit cross arm adopts domes, and the lower plane of cross arm middle part arch camber department is higher than the insulator string hanging point position of cross arm root and tip, has fully adapted to the electric clearance characteristics, compares with traditional flat cross arm, and arch cross arm has reduced iron tower total height under the condition of same hanging wire height to the at utmost, has further reduced the tower weight.
The utility model discloses an arch cross arm tower type structure of + -1100 kV direct current circuit and earthing pole circuit with the tower, ground wire support set up at the last plane of + -1100 kV direct current circuit cross arm for hang ground wire (or OPGW optical cable), provide lightning protection function to + -1100 kV direct current circuit and earthing pole circuit simultaneously. Compared with the traditional scheme of erecting the grounding electrode circuit alone, the utility model discloses a required ordinary ground wire of grounding electrode circuit has been saved.
Drawings
Fig. 1 is a schematic three-dimensional structure of the present invention;
FIG. 2 is a front single line schematic of the present invention;
wherein: a is a +/-1100 kV direct current line tower head, B is a grounding electrode line cross arm, C is a tower body, and D is a tower leg; the cable comprises a direct current circuit cross arm 1, a ground wire support 2, a direct current circuit lead 3, a grounding electrode circuit lead 4, a direct current circuit insulator string 5, a common ground wire 6 and an OPGW optical cable 7, wherein the direct current circuit cross arm is arranged on the upper portion of the cable body; m is a hanging point of the direct current line insulator string, and N is a cross arm arch-forming point.
Among the above names: a comprises 1 and 2; 1 and B are collectively called cross arm; 3 and 4 are collectively referred to as conductive lines.
Detailed Description
In order to make the features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
The utility model discloses a shown in fig. 1, fig. 2 an embodiment of the arch cross arm tower type structure of the same tower of 1100kV direct current circuit and earthing pole circuit is used for the 1 st section circuit of certain 1100kV extra-high voltage direct current transmission engineering starting point department, and the area that the circuit is located is high wind speed area.
In the embodiment shown in fig. 1 and 2, the arched cross arm tower-shaped structure of the ± 1100kV dc line and the earth electrode line on the same tower is a space truss structure composed of angle steel members, and comprises a tower head a of the ± 1100kV dc line, an earth electrode line cross arm B, a tower body C and a tower leg D. The +/-1100 kV direct-current line tower head A is positioned at the top of the structure and consists of a +/-1100 kV direct-current line cross arm 1 and a ground wire support 2 positioned on the upper plane of the cross arm; the grounding electrode circuit cross arm B is positioned in the middle of the structure and is connected with the tower body C; the upper end of the tower body C is connected with the tower head A, and the lower end of the tower body C is connected with the tower legs D.
As shown in fig. 2, a ± 1100kV dc line cross arm 1 suspends a dc line lead 3 through a dc line insulator string 5, an earth electrode line lead 4 is suspended at the outer end of the earth electrode line cross arm B, and the vertical distance between the lead 3 and the lead 4 is 13 m. The direct current circuit insulator string 5 is V-shaped, the included angle is 100-110 degrees, and the upper ends of two limbs of the insulator string 5 are respectively hung at the root end of the direct current circuit cross arm B and the M point of the end part of the direct current circuit cross arm B. And a common ground wire 6 is hung at the top end of the ground wire bracket 2 on the right side, and an OPGW optical cable 7 is hung at the top end of the ground wire bracket 2 on the left side.
The direct current line cross arm 1 is of an arch structure, the height of the root of the direct current line cross arm is the same as that of the lower plane of the end of the direct current line cross arm, the middle of the direct current line cross arm is arched upwards, and the lower plane of the arched position is higher than the lower planes of the root and the end of the arch structure.
Further, the number of the direct current line cross arms 1, the ground wire supports 2 and the grounding electrode line cross arms B is two, and the two direct current line cross arms 1, the two ground wire supports 2 and the two grounding electrode line cross arms B are respectively in bilateral symmetry with respect to the center of the tower body C. The rationality of the arched cross arm tower-shaped structure of the same tower of the +/-1100 kV direct-current line and the grounding electrode line is ensured.
The direct current circuit cross arm 1 and the grounding electrode circuit cross arm B are connected with the tower body C through bolts; the ground wire bracket 2 is connected with the direct current circuit cross arm 1 through a bolt. The assembly and disassembly are convenient, and the rapid operation construction is facilitated.
One of the core ideas of this embodiment is that by setting up grounding electrode line cross arm B at a suitable position below the ± 1100kV dc line cross arm 1, the present embodiment can simultaneously suspend the ± 1100kV dc line conductor 3 and the grounding electrode line conductor 4, thereby avoiding the conventional design scheme of respectively suspending the conductor 3 and the conductor 4 by using different iron towers, and further saving the usage of towers and base materials, and reducing the permanent occupation of land by the iron towers. In order to make the direct current line lead 3 and the grounding electrode line lead 4 suspended in the present embodiment meet the electrical performance requirement in terms of space distance, the present embodiment sets the grounding electrode line cross arm B at a proper position of the tower body C to meet the requirement that the vertical distance between the lead 3 and the lead 4 is greater than 13 m. According to the wire arrangement mode of the embodiment, under the condition that the terrain is flat, the ground distance of the grounding electrode line wire 4 does not control the height of the tower, and the height of the tower of the embodiment is controlled by the ground distance of the +/-1100 kV direct current line wire. And then the height of the tower can be fully utilized, the hanging height of the lead 4 is reduced as much as possible, the load of the tower is reduced, and the weight of the tower is reduced as much as possible.
The second core idea of this embodiment is to arch at N points, so that the middle portion of the lower plane of the dc line cross arm 1 is higher than the suspension point M of the insulator string, so as to satisfy the requirement that the electrical gap between the wire 3 and the lower plane of the cross arm is greater than the vertical height of the insulator string 5, whereas the conventional flat cross arm scheme (the N points are not arched, and the M points and the N points are located on the same horizontal plane) satisfies the electrical gap requirement by extending the length of the insulator string 5 to increase the vertical distance between the wire 3 and the lower plane of the cross arm.
Although the conventional configuration that the common ground wire 6 is erected on one side of the tower top and the OPGW optical cable 7 is erected on the other side is adopted in the embodiment, the ± 1100kV direct current line 3 and the grounding electrode line 4 are suspended at the same time, so that the lightning protection function of the common ground wire 6 and the OPGW optical cable 7 is expanded compared with the conventional scheme, and the conventional configuration not only meets the lightning protection requirement of the ± 1100kV direct current line 3, but also provides the lightning protection for the grounding electrode line 4. Compared with the conventional scheme of erecting the grounding electrode circuit by adopting a single iron tower, the method saves the cost of the ground wire of the grounding electrode circuit and has good economic benefit.
The above description is provided for the purpose of describing the present invention in more detail with reference to the specific preferred embodiments, and it should not be construed that the embodiments of the present invention are limited thereto, and it will be apparent to those skilled in the art that the present invention can be implemented in various forms without departing from the spirit and scope of the present invention.
Claims (7)
1. The utility model provides a +/-1100 kV direct current circuit and earthing pole circuit are with arch cross arm tower type structure of tower which characterized in that: the tower comprises a +/-1100 kV direct-current line tower head (A), a grounding electrode line cross arm (B), a tower body (C) and tower legs (D); the +/-1100 kV direct-current line tower head (A) is positioned at the top of the tower body (C), and comprises a direct-current line cross arm (1) and a ground wire bracket (2) positioned on the upper plane of the cross arm; the grounding electrode circuit cross arm (B) is positioned in the middle of the tower body (C); the lower end of the tower body (C) is connected with the tower legs (D);
the +/-1100 kV direct-current line cross arm (1) is connected with two direct-current line insulator strings (5) of a direct-current line lead (3) through insulator string suspension points (M) at the root part and the end part of the direct-current line cross arm, and the grounding electrode line cross arm (B) is connected with an insulator string of a grounding electrode line lead (4) through an insulator string suspension point positioned at the outer end of the grounding electrode line cross arm;
the direct current line cross arm (1) is of an arch structure, the height of the root of the direct current line cross arm is the same as that of the lower plane of the end part of the direct current line cross arm, the middle of the direct current line cross arm is arched upwards, and the lower plane of the arched position is higher than the lower planes of the root and the end part of the arch structure.
2. The arched cross arm tower structure of the ± 1100kV direct current line and the earth electrode line on the same tower as in claim 1, characterized in that: the two direct current line insulator strings (5) are V-shaped.
3. The arched cross arm tower structure of the ± 1100kV direct current line and the earth electrode line on the same tower as in claim 2, characterized in that: the V-shaped included angle is 100-110 degrees.
4. The arched cross arm tower structure of the ± 1100kV direct current line and the earth electrode line on the same tower as in claim 1, characterized in that: and a common ground wire (6) is hung at the top end of one side of the ground wire support (2), and an OPGW optical cable (7) is hung at the top end of the other side of the ground wire support.
5. The arched cross arm tower structure of the ± 1100kV direct current line and the earth electrode line on the same tower as in claim 1, characterized in that: and the vertical distance between the suspension point of the direct current line lead (3) and the suspension point of the grounding electrode line lead (4) is more than 13 m.
6. The arched cross arm tower structure of the ± 1100kV direct current line and the earth electrode line on the same tower as in claim 1, characterized in that: the number of the direct current circuit cross arms (1), the ground wire supports (2) and the grounding electrode circuit cross arms (B) is two, and the two direct current circuit cross arms (1), the ground wire supports (2) and the grounding electrode circuit cross arms (B) are respectively in bilateral symmetry about the center of the tower body (C).
7. The arched cross arm tower structure of the ± 1100kV direct current line and the earth electrode line on the same tower as in claim 1, characterized in that: the direct current circuit cross arm (1) and the grounding electrode circuit cross arm (B) are connected with the tower body (C) through bolts; the ground wire bracket (2) is connected with the direct current circuit cross arm (1) through a bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020763202.2U CN212336874U (en) | 2020-05-09 | 2020-05-09 | Arch cross arm tower type structure of +/-1100 kV direct current line and grounding electrode line on same tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020763202.2U CN212336874U (en) | 2020-05-09 | 2020-05-09 | Arch cross arm tower type structure of +/-1100 kV direct current line and grounding electrode line on same tower |
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| CN212336874U true CN212336874U (en) | 2021-01-12 |
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| CN202020763202.2U Active CN212336874U (en) | 2020-05-09 | 2020-05-09 | Arch cross arm tower type structure of +/-1100 kV direct current line and grounding electrode line on same tower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112878782A (en) * | 2021-03-24 | 2021-06-01 | 中国电力工程顾问集团西北电力设计院有限公司 | Arch-shaped suspension tangent tower on +/-800 kV extra-high voltage direct current transmission line |
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2020
- 2020-05-09 CN CN202020763202.2U patent/CN212336874U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112878782A (en) * | 2021-03-24 | 2021-06-01 | 中国电力工程顾问集团西北电力设计院有限公司 | Arch-shaped suspension tangent tower on +/-800 kV extra-high voltage direct current transmission line |
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