CN210768073U - 500kV double-loop linear transposition tower - Google Patents
500kV double-loop linear transposition tower Download PDFInfo
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- CN210768073U CN210768073U CN201921082660.3U CN201921082660U CN210768073U CN 210768073 U CN210768073 U CN 210768073U CN 201921082660 U CN201921082660 U CN 201921082660U CN 210768073 U CN210768073 U CN 210768073U
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Abstract
The utility model discloses a 500kV double-loop linear transposition tower, which comprises a tower, wherein the right side of the upper part of the tower is provided with a right upper phase wire hanging point, the right side of the middle part of the tower is externally provided with a right middle phase outer wire hanging point, and the right side of the middle part of the tower is internally provided with a right middle phase inner wire hanging point; a left middle phase outer lead hanging point is arranged outside the left side of the middle part of the tower, a left middle phase inner lead hanging point is arranged inside the left side of the middle part of the tower, and a left lower phase lead hanging point is arranged on the left side of the lower part of the tower; the utility model discloses can realize that the circuit transposes, the commutation, can save the tower material, reduce the area of iron tower, construction operation and maintenance are convenient.
Description
Technical Field
The utility model relates to a transposition tower technical field specifically indicates a 500kV two return circuits straight line transposition tower.
Background
The transposition overlapping is a tower allowing the relative position of a transmission conductor to be changed along the line direction, and is an essential device in the power transmission process. In the process of electric energy transmission, the distances among three conductors of the power transmission line are usually not equal, and the reactance of the conductors depends on the distance between the conductors and the radius of the conductors, so that if the conductors are not transposed, the three-phase impedance is unbalanced, and the longer the line is, the more serious the unbalance is. To overcome the problem of three-phase impedance imbalance, power transmission line design regulations specify that "in a power network with a neutral point directly grounded, power transmission lines with a length exceeding 100km should be transposed". The conductor transposition is generally carried out in a transposition tower. The asymmetry of voltage and current when the power system normally operates can be reduced by transposition through the transposition tower, and the influence of the power transmission line on the communication line is limited. Common transposition modes include linear rod transposition, strain tower transposition and suspension transposition.
1. Leading the two single loops to two single loops through a double-loop branch tower, performing full transposition on the wires by using the two single loop strain towers, and merging the two single loops into the double loops after transposition, namely a 'double-single (transposition) -double' mode; the method increases the expenses of land occupation in the line corridor, building removal, modification and cleaning of other facilities and the like, is not beneficial to environmental protection and livelihood, and simultaneously improves the overall investment of the project;
2. the transposition of the same-tower conducting wire is realized by the aid of the double-loop tower with the bypass jumper wire support, and the jumper wires of the same-tower transposition mode of the double-loop tower are more, so that the construction difficulty is high, the long-term operation maintenance is also realized, and particularly, the inconvenience is brought to live maintenance personnel;
3. the transposition is realized through a single-column combined strain transposition tower, namely, two single-column strain towers horizontally arranged according to a certain distance are combined with a single-column attached tower to form three single-column strain towers in total, and the double-loop lead wire full transposition is realized through jumper connection between the towers; the transposition tower (formed by three columns) has large occupied area, and the jumper connection distance between single-column transposition towers is long and complicated, so that the operation and maintenance are difficult; use a certain basic strain insulator angle tower on the circuit, change the jumper that originally sets up to connect and trade the position, but the body of the tower that can make the transposition tower is the jumper wire all around too many, and full tower needs six groups of jumper wires, and the structure is very complicated, overhauls very inconveniently to the operation.
Disclosure of Invention
An object of the utility model is to overcome above-mentioned not enough, provide a 500kV two return circuits straight line transposition tower that can realize the circuit transposition, commutation, can save tower material, reduce the area of iron tower, construction operation and maintenance convenience.
The utility model discloses a solve above-mentioned technical problem, the technical scheme who adopts is: a500 kV double-loop linear transposition tower comprises a tower, wherein a right upper phase wire hanging point is arranged on the right side of the upper part of the tower, a right middle phase outer wire hanging point is arranged outside the right side of the middle part of the tower, and a right middle phase inner wire hanging point is arranged inside the right side of the middle part of the tower; the left side of the middle part of the tower is externally provided with a left middle phase outer conductor hanging point, the left side of the middle part of the tower is internally provided with a left middle phase inner conductor hanging point, and the left side of the lower part of the tower is provided with a left lower phase conductor hanging point.
Preferably, the upper right phase conductor hanging point and the lower left phase conductor hanging point are respectively connected with the side part of the tower through a right-angled tripod, and the upper right phase conductor hanging point and the lower left phase conductor hanging point are both positioned below the minimum angle of the right-angled tripod.
Preferably, the left middle phase outer conductor hanging point and the left middle phase inner conductor hanging point are connected with the side part of the tower through a right-angle tripod.
Preferably, the outer wire hanging point of the left middle phase is positioned below the minimum angle of the right-angled tripod, and the inner wire hanging point of the left middle phase is positioned below the long right-angled side of the right-angled tripod.
Preferably, the right middle phase outer conductor hanging point and the right middle phase inner conductor hanging point are connected with the side part of the tower through a right-angled tripod.
Preferably, the outer wire hanging point of the right middle phase is positioned below the minimum angle of the right triangular frame, and the inner wire hanging point of the right middle phase is positioned below the long right-angle side of the right triangular frame.
The utility model has the advantages that:
(1) compared with a double-single (transposition) -double transposition mode and a single-column combined strain transposition tower transposition mode, the method obviously reduces the cost of land occupation in a line corridor, building removal, transformation and cleaning of other facilities and the like, is beneficial to environmental protection and civilian life, reduces the overall investment of engineering, and has better social and economic benefits.
(2) Compared with the mode that the bypass jumper supports of the double-loop tower are arranged on the same tower, the mode that the jumper supports of the double-loop tower are arranged on the same tower and the jumper wires of the tower body are more, the construction difficulty is high, long-term operation maintenance is also provided, particularly, the maintenance personnel are inconvenient for electrification, the tower type wiring is simple, the jumper wires can be normally jumped, the construction and the operation are convenient and flexible, and the design purpose of 'people oriented' is achieved.
(3) The upper cross arm and the lower cross arm of the tower type are provided with only one hanging point, only one side cross arm is needed, the structure is simple, the weight of the tower body is reduced, transportation and installation in areas with inconvenient traffic are facilitated, the material cost of iron tower steel, insulators and the like is saved, and the tower type has better economical efficiency.
(4) The tower-type design flexibly selects different wire arrangement combinations according to different phase sequences of the circuit to realize transposition and phase change, and one base tower can realize integral transposition of three-phase wires or phase change between two-phase wires.
Drawings
FIG. 1 is a schematic structural diagram of a 500kV double-loop linear transposition tower;
FIG. 2 is a schematic structural diagram of another 500kV double-loop linear transposition tower;
FIG. 3 is a schematic view of the installation of the linear transposition tower of FIG. 1;
in the figure, a right upper phase wire hanging point 1, a left middle phase outer wire hanging point 2, a left middle phase inner wire hanging point 3, a right middle phase inner wire hanging point 4, a right middle phase outer wire hanging point 5 and a left lower phase wire hanging point 6.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
As shown in fig. 1, the 500kV double-loop linear transposition tower comprises a tower, wherein a right upper phase wire hanging point 1 is arranged on the right side of the upper part of the tower, a right middle phase outer wire hanging point 5 is arranged outside the right side of the middle part of the tower, and a right middle phase inner wire hanging point 4 is arranged inside the right side of the middle part of the tower; the left side of the middle part of the tower is externally provided with a left middle phase outer conductor hanging point 2, the left side of the middle part of the tower is internally provided with a left middle phase inner conductor hanging point 3, and the left side of the lower part of the tower is provided with a left lower phase conductor hanging point 6.
Preferably, the upper right phase conductor hanging point 1 and the lower left phase conductor hanging point 6 are respectively connected with the side part of the tower through a right-angled tripod, and the upper right phase conductor hanging point 1 and the lower left phase conductor hanging point 6 are both positioned below the minimum angle of the right-angled tripod.
Preferably, the left middle phase outer conductor hanging point 2 and the left middle phase inner conductor hanging point 3 are connected with the side part of the tower through a right-angle tripod.
Preferably, the left middle phase outer wire hanging point 2 is positioned below the minimum angle of the right-angle tripod, and the left middle phase inner wire hanging point 3 is positioned below the long right-angle side of the right-angle tripod.
Preferably, the right middle phase outer conductor hanging point 5 and the right middle phase inner conductor hanging point 4 are connected with the side part of the tower through a right-angle tripod.
Preferably, the right middle phase outer wire hanging point 5 is positioned below the minimum angle of the right triangular frame, and the right middle phase inner wire hanging point 4 is positioned below the long right-angle side of the right triangular frame.
Fig. 2 is a schematic structural diagram of another 500kV double-loop linear transposition tower, which is in mirror symmetry with fig. 1, wherein the horizontal spacing between each circuit phase conductor and the vertical spacing between each circuit phase conductor of two transposition tower combinations are planned and designed according to the existing specifications and actual engineering requirements, and the physical positions of the conductors are transformed in space by using the horizontal and vertical distances between each phase conductor of the tower and the vertical distances between adjacent double-loop towers, so as to realize the transposition and phase change of the lines.
The working principle of the embodiment is as follows: taking a 500kV double-loop linear transposition tower corresponding to fig. 1 as an example, in fig. 3, a first linear transposition tower, a second linear transposition tower (i.e. the linear transposition tower of the patent corresponding to fig. 1) and a third linear transposition tower are sequentially arranged from left to right; for the first tangent tower, three-phase conductors ABC and C ' B ' A ' of the double-loop are respectively connected to the upper left cross arm, the middle left cross arm, the lower left cross arm, the upper right cross arm, the middle right cross arm and the lower right cross arm of the first tangent tower; then, connecting the AB phase and B ' A ' phase of the first tangent tower to a left middle phase external lead hanging point 2, a left middle phase internal lead hanging point 3, a right middle phase internal lead hanging point 4 and a right middle phase external lead hanging point 5 of a second tangent exchange tower, and connecting the C phase and C ' phase of the first tangent tower to a left lower phase lead hanging point 6 and a right upper phase lead hanging point 1 of the second tangent exchange tower; and then, the AB phase and the B ' A ' phase of the second linear transposition tower are connected to the left middle hanging point, the left upper hanging point, the right lower hanging point and the right middle hanging point of the third linear tower to realize the AB phase transposition and the B ' A ' phase transposition, and the C phase and the C ' phase of the second linear transposition tower are connected to the left lower hanging point and the right upper hanging point of the third linear tower, so that the phase changing of the three-phase wires ABC and C ' B ' A ' of the double-loop into BAC and C ' A ' B ' is realized through the one-base double-loop linear transposition tower and the adjacent two-base linear transposition towers, and the risk of cross contact among all the lines is avoided.
The above embodiments are merely preferred technical solutions of the present invention, and should not be considered as limitations of the present invention, and the features in the embodiments and the examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.
Claims (6)
1. The utility model provides a 500kV two return circuits straight line transposition tower, includes the shaft tower, its characterized in that: a right upper phase wire hanging point (1) is arranged on the right side of the upper part of the tower, a right middle phase outer wire hanging point (5) is arranged outside the right side of the middle part of the tower, and a right middle phase inner wire hanging point (4) is arranged in the right side of the middle part of the tower; the tower is characterized in that a left middle phase outer conductor hanging point (2) is arranged outside the left side of the middle of the tower, a left middle phase inner conductor hanging point (3) is arranged inside the left side of the middle of the tower, and a left lower phase conductor hanging point (6) is arranged on the left side of the lower portion of the tower.
2. The 500kV double-loop linear transposition tower of claim 1, characterized in that: the upper right phase conductor hanging point (1) and the lower left phase conductor hanging point (6) are respectively connected with the side part of the tower through a right-angle tripod, and the upper right phase conductor hanging point (1) and the lower left phase conductor hanging point (6) are both positioned below the minimum angle of the right-angle tripod.
3. The 500kV double-loop linear transposition tower of claim 1, characterized in that: the left middle phase outer lead hanging point (2) and the left middle phase inner lead hanging point (3) are connected with the side part of the tower through a right-angle tripod.
4. The 500kV double-loop linear transposition tower of claim 3, characterized in that: the left middle phase outer wire hanging point (2) is positioned below the minimum angle of the right-angle tripod, and the left middle phase inner wire hanging point (3) is positioned below the long right-angle side of the right-angle tripod.
5. The 500kV double-loop linear transposition tower of claim 1, characterized in that: and the right middle phase outer lead hanging point (5) and the right middle phase inner lead hanging point (4) are connected with the side part of the tower through a right-angle tripod.
6. The 500kV double-loop linear transposition tower of claim 4, characterized in that: the right middle phase outer wire hanging point (5) is positioned below the minimum angle of the right triangular frame, and the right middle phase inner wire hanging point (4) is positioned below the long right-angle side of the right triangular frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921082660.3U CN210768073U (en) | 2019-07-11 | 2019-07-11 | 500kV double-loop linear transposition tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921082660.3U CN210768073U (en) | 2019-07-11 | 2019-07-11 | 500kV double-loop linear transposition tower |
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| Publication Number | Publication Date |
|---|---|
| CN210768073U true CN210768073U (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921082660.3U Active CN210768073U (en) | 2019-07-11 | 2019-07-11 | 500kV double-loop linear transposition tower |
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| CN (1) | CN210768073U (en) |
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2019
- 2019-07-11 CN CN201921082660.3U patent/CN210768073U/en active Active
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