CN111411814A - High-altitude extra-high voltage test terminal drainage tower - Google Patents
High-altitude extra-high voltage test terminal drainage tower Download PDFInfo
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- CN111411814A CN111411814A CN201910852899.2A CN201910852899A CN111411814A CN 111411814 A CN111411814 A CN 111411814A CN 201910852899 A CN201910852899 A CN 201910852899A CN 111411814 A CN111411814 A CN 111411814A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 11
- 238000006073 displacement reaction Methods 0.000 description 7
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- 238000005516 engineering process Methods 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
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- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/24—Cross arms
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/20—Side-supporting means therefor, e.g. using guy ropes or struts
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/20—Spatial arrangements or dispositions of lines or cables on poles, posts or towers
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Abstract
The invention protects a high-altitude extra-high voltage test terminal drainage tower, which is provided with a tower body, a ground wire bracket and a horizontal cross arm of a lead, and is characterized in that a plurality of lead hanging points are arranged on the lower planes on the left side and the right side of the horizontal cross arm of the lead, and symmetrical alternating current lead hanging points are arranged in front of and behind the middle position of the tower body at the height of the lower plane; a tower body longitudinal cross arm is arranged on the tower body along the direction of the power generator; the left and right end parts of the horizontal cross arm of the conducting wire are respectively provided with side-phase longitudinal cross arms along the direction of the power generator; v-shaped string hanging points are respectively arranged at the end parts of the longitudinal cross arm of the tower body and the longitudinal cross arm of the side phase; inhaul cables are respectively connected between the ground wire bracket and the side phase longitudinal cross arms on the left side and the right side; the tower realizes multiple purposes, meets the test requirements of ultrahigh voltage direct current and alternating current engineering with the highest voltage level in the world, and greatly reduces the engineering investment.
Description
Technical Field
The invention relates to a high-altitude extra-high voltage test terminal drainage tower applied to an electric test of extra-high voltage alternating current and direct current transmission lines in a high-altitude area.
Background
With the rapid development of economy in China, the demand of the society on energy sources is more and more huge in all aspects, especially, the main energy consumption points are concentrated in the middle east region, most of the energy sources such as coal, hydroenergy and land wind energy are located in the west region, and with the large-scale intensive development and utilization of hydropower, the power development mode is changed from a local balance development mode to a large power grid networking power supply mode; the east region is not suitable for large-scale construction of coal-fired power plants due to large environmental pressure, high transportation cost and deficient land resources, and objectively determines that the development of energy and power in China has to go on the roads for long-distance and large-scale power transmission and nationwide resource allocation optimization, so that the construction of the extra-high voltage power grid in the west region becomes the core task of long-distance power transmission to the middle east region of China, and the establishment of the extra-high voltage power grid in the high altitude region in Tibet and other high-altitude regions is also included.
At present, in order to achieve the aim of establishing an extra-high voltage power grid in a high altitude area, the construction of a west-east power transmission project needs to provide all-around technical support, and test conditions are created for an ultra/extra-high voltage power transmission key technology under the high altitude condition, so that a national power grid organization has constructed a high altitude test base in a 4000 m region in Tibet to meet the requirements of power grid power transmission project development and high voltage insulation and electromagnetic environment test technology and basic theory research in China; in order to obtain extra-high voltage electrical test parameters in a high-altitude area in the construction of a test base, an extra-high voltage overhead transmission test line in the high-altitude area needs to be constructed, a first base iron tower adjacent to a power generator is a terminal drainage tower, and the design of the high-altitude extra-high voltage test terminal drainage tower has the following four main technical problems:
1. The method needs to meet the electrical parameter test of a direct current line with the highest voltage grade of +/-1300 kV, and the arrangement of a pole wire hanging point of a drainage tower needs to meet the requirements of various pole distances;
2. The method comprises the following steps that an electrical parameter test of an alternating current line with the highest voltage level of 1000kV needs to be met, and a hanging point is reserved on a pole tower lead cross arm for carrying out a test work of erecting the alternating current line;
3. The outer edge of the tower body and the power generator need to keep a certain distance to meet the requirement of an electrical gap;
4. It is necessary to carry an extra heavy V-string, which is located above the power generator.
The drainage tower structure is used for solving the problems that the maximum pole distance of the cross arm of a conducting wire of the existing drainage tower for high altitude tests is 18 meters, the maximum load can only meet the load requirement of a +/-500 kV direct current line (shown in a figure 10), and the test load, the multiple pole distance and the electrical gap requirement between a power generator and a +/-1300 kV direct current extra-high voltage transmission line and a 1000kV alternating current extra-high voltage can not be met.
Disclosure of Invention
The invention provides a high-altitude extra-high voltage test terminal drainage tower.
The technical means adopted by the invention are as follows.
The invention provides a high-altitude extra-high voltage test terminal drainage tower which is provided with a tower body, a ground wire support and a lead horizontal cross arm, and is characterized in that a plurality of lead hanging points are arranged on the lower planes on the left side and the right side of the lead horizontal cross arm, and symmetrical alternating current lead hanging points are arranged in front of and behind the middle position of the tower body at the height of the lower plane; a tower body longitudinal cross arm is arranged on the tower body along the direction of the power generator; the left and right end parts of the horizontal cross arm of the conducting wire are respectively provided with side-phase longitudinal cross arms along the direction of the power generator; v-shaped string hanging points are respectively arranged at the end parts of the longitudinal cross arm of the tower body and the longitudinal cross arm of the side phase; and inhaul cables are respectively connected between the ground wire bracket and the side-phase longitudinal cross arms on the left side and the right side.
Wherein above-mentioned high-altitude extra-high voltage test terminal drainage tower further has following characteristics.
12 pairs of wire hanging points are symmetrically arranged in front and back of the lower planes on the left side and the right side of the wire horizontal cross arm; preferably, the lower plane of the longitudinal cross arm of the tower body and the lower plane of the longitudinal cross arm of the side phase have the same horizontal position; the end part of the side phase longitudinal cross arm is set to be a variable cross section end part necking type; the distance between the conducting wire hanging points and the pole which is outward from the middle of the tower body is 18m, 22m, 26m, 30m, 34m and 38 m.
In addition, the guy cable connection mode of the high-altitude extra-high voltage test terminal drainage tower has the following characteristics.
In a preferred first connection scheme, the upper end of the stay cable is connected to the outermost node of the end of the lower plane of the ground wire bracket, and the lower end of the stay cable is connected to the node of the inner side of the upper plane of the variable cross section of the side-phase longitudinal cross arm, or the stay cable can be connected in the following modes:
And the upper end of the inhaul cable is connected to the outermost node of the end part of the lower plane of the ground wire bracket, and the lower end of the inhaul cable is connected to the node of the inner side of the upper plane of the end part of the side-phase longitudinal cross arm.
And the upper end of the inhaul cable is connected to a node in the middle of the lower plane of the ground wire support, and the lower end of the inhaul cable is connected to a node on the inner side of the upper plane of the end part of the side-phase longitudinal cross arm.
And the upper end of the inhaul cable is connected to a node in the middle of the lower plane of the ground wire support, and the lower end of the inhaul cable is connected to a node on the inner side of the upper plane of the variable cross section of the side-phase longitudinal cross arm.
And the upper end of the inhaul cable is connected to the outer node of the joint of the lower plane of the ground wire support and the tower body, and the lower end of the inhaul cable is connected to the inner node of the upper plane of the end part of the side-phase longitudinal cross arm.
And in the sixth scheme, the upper end of the stay cable is connected to the outer node of the joint of the lower plane of the ground wire support and the tower body, and the lower end of the stay cable is connected to the inner node of the upper plane of the variable cross section of the side-phase longitudinal cross arm.
The beneficial effects produced by the invention are as follows.
The invention innovatively provides a high-altitude extra-high voltage test terminal drainage tower which fully meets the test requirements of extra-high voltage direct current engineering with the highest voltage grade of +/-1300 kV and extra-high voltage alternating current engineering with the highest voltage grade of 1000 kV; meanwhile, the requirements of the multi-pole spacing test of the extra-high voltage direct current project and the requirements of the electrical clearance between the power generator and the extra-high voltage direct current project are met; in addition, the end parts of the side-phase longitudinal cross arms are designed in a variable cross-section necking mode, so that a force transmission path is further simplified, the end parts of the cross arms are prevented from being weak and easy to deform, and the tower weight can be reduced by about 1%; the inhaul cable is arranged between the ground wire support and the side phase longitudinal cross arm, so that the displacement of the V string hanging point can be reduced by more than 50%, and the risk that the V string collides with a power supply generator due to overlarge displacement is effectively reduced; therefore, one tower is multipurpose, the test requirements of ultrahigh voltage direct current and alternating current engineering with the highest voltage level in the world are met, the engineering investment is greatly reduced, the special electrical requirements between the terminal drainage tower and the power generator are met, the collision risk is reduced, the key effect is played for the whole high-altitude test base engineering, the blank of the high-altitude ultrahigh voltage engineering technology in China is filled, and the high-altitude ultrahigh voltage technology in China is pushed to the top of the world.
Drawings
FIG. 1 is a schematic view of a three-dimensional structure of a high-altitude extra-high voltage test terminal drainage tower of the invention.
FIG. 2 is a schematic diagram of a wire cross arm structure and a hanging point position of the high-altitude extra-high voltage test terminal drainage tower.
FIG. 3 is a schematic diagram of a side-phase longitudinal cross arm structure of the high-altitude extra-high voltage test terminal drainage tower.
FIG. 4 is a schematic connection relation diagram of a first preferred connection scheme of a stay cable of the drainage tower of the high-altitude extra-high voltage test terminal.
FIG. 5 is a schematic connection relation diagram of a guy cable connection scheme II of the drainage tower of the high-altitude extra-high voltage test terminal.
FIG. 6 is a schematic connection relation diagram of a third connection scheme of a guy cable of the drainage tower of the high-altitude extra-high voltage test terminal.
FIG. 7 is a schematic connection relation diagram of a fourth connection scheme of a guy cable of the drainage tower of the high-altitude extra-high voltage test terminal.
FIG. 8 is a schematic connection relation diagram of a fifth connection scheme of the guy cable of the drainage tower of the high-altitude extra-high voltage test terminal.
FIG. 9 is a schematic connection relation diagram of a sixth connection scheme of the guy cable of the drainage tower of the high-altitude extra-high voltage test terminal.
FIG. 10 is a schematic structural diagram of a current +/-500 kV high-altitude test drainage tower.
Detailed Description
The following detailed description of specific embodiments, structures, characteristics and effects of the high-altitude extra-high voltage test terminal drainage tower provided by the invention is provided with reference to the accompanying drawings.
FIG. 1 shows a schematic diagram of a three-dimensional structure of a high-altitude extra-high voltage test terminal drainage tower of the invention; as can be seen from the figure, the tower comprises a tower body 100, a ground wire support 200 and a horizontal cross arm 300 of a conducting wire, and is characterized in that a plurality of conducting wire hanging points 302 are arranged on the lower planes on the left side and the right side of the horizontal cross arm 300 of the conducting wire, and alternating current conducting wire hanging points 104 which are mutually symmetrical are arranged in front of and behind the middle position of the tower body 100 at the height of the lower planes, so that the requirement for hanging an extra-high voltage direct current conducting wire is met, and the requirement for hanging an extra-high voltage alternating current conducting wire; a tower body longitudinal cross arm 103 is arranged on the tower body 100 along the direction of the power generator, side phase longitudinal cross arms 301 are respectively arranged at the left end and the right end of the lead horizontal cross arm 300 along the direction of the power generator, and V string hanging points 501 are respectively arranged at the ends of the tower body longitudinal cross arm 103 and the side phase longitudinal cross arms 301, so that the requirement of an electrical gap between a V string and the power generator is effectively met; because the weight of the V-shaped string above the power generator greatly exceeds that of the common V-shaped string, and because the load is overlarge, inhaul cables 400 are respectively connected between the ground wire bracket 200 and the side-phase longitudinal cross arms 301 at the left side and the right side for controlling the displacement under extreme load and ensuring the safety of the power generator.
According to the requirement of the high-altitude extra-high voltage test, further as shown in fig. 2, in a schematic diagram of a wire cross arm structure and hanging point positions of a high-altitude extra-high voltage test terminal drainage tower, 12 pairs of wire hanging points 302 are symmetrically arranged in front and at back of lower planes on the left and right sides of the wire horizontal cross arm 300, wherein the distances between the wire hanging points 302 and the middle of the tower body 100 are 18m, 22m, 26m, 30m, 34m and 38m in sequence; symmetrical alternating current wire hanging points 104 are arranged in front of and behind the middle position of the tower body 100 at the height of the lower plane of the wire horizontal cross arm 300; the hanging point and the pole pitch can meet the requirements of carrying out the pole pitch and the load of a +/-1300 kV direct current test and the phase pitch and the load of a 1000kV alternating current extra-high voltage alternating current test; it should be noted that the ac wire hanging points 104 located on the same side as the tower body longitudinal cross arm 103 may be connected by a conventional wire hanging fitting.
As further shown in fig. 1, the horizontal position of the lower plane of the longitudinal cross arm 103 of the tower body is the same as that of the lower plane of the longitudinal cross arm 301 of the side phase, so that the preferred position for guiding the stress of the tower and meeting the electric clearance is designed; in the schematic side-phase longitudinal cross arm structure of the high-altitude extra-high voltage test terminal drainage tower shown in fig. 3, the end of the seen side-phase longitudinal cross arm 301 is set to be a variable cross-section end necking type, and the design of the variable cross-section end necking type is adopted, so that a force transmission path can be simplified, the force transmission path is more definite, the rigidity of a hanging point is ensured, the defect that the end of a sharp cross arm is weak and easy to deform is avoided, and about 1% of the tower weight can be reduced.
Further, as shown in fig. 4 to 9, in an actual test, the weight of the V-string above the power generator greatly exceeds the weight of the ordinary V-string, and since the load is large, it can be known from the calculation data of the iron tower that the displacement of the end part of the side-phase longitudinal cross arm 301 is larger than that of the tower body longitudinal cross arm 103, and the iron tower may have a large displacement under an extreme load condition in consideration of the influence of accumulated errors such as construction processing errors; in order to prevent the V-shaped string 500 from colliding with a power supply generator due to overlarge displacement, the end part displacement of the side-phase longitudinal cross arm 301 is controlled by arranging a stay cable 400 on the iron tower; wherein, the setting scheme of cable can have following several kinds of embodiments:
In the first embodiment shown in fig. 4, the upper end of the pulling cable 400 is connected to the outermost node of the end of the lower plane of the ground bracket, and the lower end thereof is connected to the node of the inner side of the upper plane of the variable cross section of the side phase longitudinal cross arm 301.
As shown in fig. 5, in the second embodiment, the upper end of the pulling cable 400 is connected to the outermost node of the end of the lower plane of the ground bracket 200, and the lower end thereof is connected to the node of the inner side of the upper plane of the end of the side phase longitudinal cross arm 301.
In the third embodiment shown in fig. 6, the upper end of the pulling cable 400 is connected to the node of the middle of the lower plane of the ground bracket 200, and the lower end thereof is connected to the node of the inner side of the upper plane of the end of the side-phase longitudinal cross arm 301.
In the fourth embodiment shown in fig. 7, the upper end of the pulling cable 400 is connected to the node of the middle of the lower plane of the ground bracket 200, and the lower end thereof is connected to the node of the inner side of the upper plane of the variable cross section of the side phase longitudinal cross arm 301.
In the fifth embodiment shown in fig. 8, the upper end of the guy cable 400 is connected to the outer node of the joint between the lower plane of the ground bracket 200 and the tower body 100, and the lower end thereof is connected to the inner node of the upper plane of the end of the side-phase longitudinal cross arm 301.
In the sixth embodiment shown in fig. 9, the upper end of the guy cable 400 is connected to the outer node of the connection between the lower plane of the ground wire support 200 and the tower body 100, and the lower end thereof is connected to the inner node of the upper plane of the variable cross section of the side-phase longitudinal cross arm 301.
And determining that the final design implementation scheme is the optimal implementation scheme through multi-scheme calculation comparison and selection, and calculating the bearing capacity of the iron tower according to the condition that the iron tower meets the conditions of existence and absence of the stay cable.
The high-altitude extra-high voltage test terminal drainage tower really realizes one tower with multiple purposes, meets the extra-high voltage direct current and alternating current engineering test requirements of the highest voltage level in the world, greatly reduces the engineering investment, solves the special electrical requirements between the terminal drainage tower and a power generator, reduces the risk of collision, plays a key role in the whole high-altitude test base engineering, fills the blank of the high-altitude extra-high voltage engineering technology in China, and pushes the high-altitude extra-high voltage technology in China to the top of the world.
Claims (6)
1. The high-altitude extra-high voltage test terminal drainage tower is provided with a tower body (100), a ground wire support (200) and a horizontal wire cross arm (300), and is characterized in that a plurality of wire hanging points (302) are arranged on lower planes on the left side and the right side of the horizontal wire cross arm (300), and alternating current wire hanging points (104) which are mutually symmetrical are arranged in front of and behind the middle position of the tower body (100) at the height of the lower planes;
A tower body longitudinal cross arm (103) is arranged on the tower body (100) along the direction of the power generator; the end parts of the left side and the right side of the lead horizontal cross arm (300) are respectively provided with a side phase longitudinal cross arm (301) along the direction of the power generator; v-shaped string hanging points (501) are respectively arranged at the end parts of the tower body longitudinal cross arm (103) and the side phase longitudinal cross arm (301);
Inhaul cables (400) are respectively connected between the ground wire support (200) and the side-phase longitudinal cross arms (301) on the left side and the right side.
2. The high-altitude extra-high voltage test terminal drainage tower of claim 1, wherein 12 pairs of wire hanging points (302) are symmetrically arranged in front and back of the lower planes on the left side and the right side of the horizontal cross arm (300) of the wire.
3. The high-altitude extra-high voltage test terminal drainage tower of claim 1, wherein the lower plane of the longitudinal cross arm (103) of the tower body and the lower plane of the longitudinal cross arm (301) of the side phase have the same horizontal position.
4. The high-altitude extra-high voltage test terminal drainage tower of claim 1, wherein the end of the side phase longitudinal cross arm (301) is provided with a variable cross-section end necking type.
5. The high-altitude extra-high voltage test terminal drainage tower as claimed in claim 1, wherein the upper end of the guy cable (400) is connected to the outermost node of the end part of the lower plane of the ground wire bracket (200), and the lower end of the guy cable is connected to the node of the inner side of the upper plane of the variable cross section of the side phase longitudinal cross arm (301); or the upper end of the inhaul cable (400) is connected to the outermost node of the end part of the lower plane of the ground wire bracket (200), and the lower end of the inhaul cable is connected to the node of the inner side of the upper plane of the end part of the side-phase longitudinal cross arm (301); or the upper end of the inhaul cable (400) is connected to a node of the middle of the lower plane of the ground wire bracket (200), and the lower end of the inhaul cable is connected to a node of the inner side of the upper plane of the end part of the side-phase longitudinal cross arm (301); or the upper end of the inhaul cable (400) is connected to a node of the middle part of the lower plane of the ground wire bracket (200), and the lower end of the inhaul cable is connected to a node of the inner side of the upper plane of the variable cross section of the side-phase longitudinal cross arm (301); or the upper end of the inhaul cable (400) is connected to an outer node of the joint of the lower plane of the ground wire bracket (200) and the tower body (100), and the lower end of the inhaul cable is connected to an inner node of the upper plane of the end part of the side-phase longitudinal cross arm (301); or the upper end of the inhaul cable (400) is connected to the outer node of the joint of the lower plane of the ground wire support (200) and the tower body (100), and the lower end of the inhaul cable is connected to the inner node of the upper plane of the variable cross section of the side-phase longitudinal cross arm (301).
6. The high-altitude extra-high voltage test terminal drainage tower of claim 2, wherein the pole spacing of the wire hanging point (302) from the middle of the tower body (100) to the outside in sequence is 18m, 22m, 26m, 30m, 34m and 38 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910852899.2A CN111411814A (en) | 2019-09-10 | 2019-09-10 | High-altitude extra-high voltage test terminal drainage tower |
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| CN201910852899.2A CN111411814A (en) | 2019-09-10 | 2019-09-10 | High-altitude extra-high voltage test terminal drainage tower |
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| CN111411814A true CN111411814A (en) | 2020-07-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113266195A (en) * | 2021-06-01 | 2021-08-17 | 国核电力规划设计研究院有限公司 | Wire cross arm assembly and four-circuit tower on same tower |
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2019
- 2019-09-10 CN CN201910852899.2A patent/CN111411814A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113266195A (en) * | 2021-06-01 | 2021-08-17 | 国核电力规划设计研究院有限公司 | Wire cross arm assembly and four-circuit tower on same tower |
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