CN201433592Y - An ultra-high voltage iron tower - Google Patents

Abstract

The utility model discloses an iron tower for UHV. The iron tower is a wine glass-shaped straight tower, comprising: tower legs, the height of the tower legs is a tower that allows the iron tower to be installed vertically according to the topography of the place where the iron tower is installed. Leg height; the tower body erected on the tower legs, the horizontal section of the tower body is rectangular; the tower head erected on the tower body includes two curved arms connected with the tower body, symmetrically placed on the The cross arm on the crank arm and the outstretched ground wire support on the side cross arm of the cross arm; the space enclosed by the middle cross arm of the cross arm and the two crank arms can surround the UHV medium-phase conductor. The first gap circle is formed, and the space enclosed by the side cross arm and the crank arm on the same side can surround the second gap circle formed by the UHV side phase conductor. The ultra-high voltage iron tower can meet the electrical clearance requirements of ultra-high voltage transmission; it forms a negative protection angle for the wires, which is suitable for use in mountainous areas; it adopts all-round long and short tower legs to protect the terrain and vegetation in mountainous areas, which is beneficial to environmental protection.

Description

An ultra-high voltage iron tower

technical field

The utility model relates to the field of ultra-high voltage power transmission, in particular to an iron tower for ultra-high voltage.

Background technique

UHV power transmission technology refers to power transmission technology with a higher voltage level above 750kV AC and ±500kV DC, including AC UHV power transmission technology and DC UHV power transmission technology.

my country has a vast territory and is a big country in the production and use of electric energy. The distribution of power generation resources and economic development are extremely unbalanced. Nearly 2/3 of the country's developable hydropower resources are located in Sichuan, Yunnan, and Tibet in the west; 2/3 of the coal reserves are distributed in Shanxi, Shaanxi, and Inner Mongolia. However, 2/3 of the country's electricity load is distributed in the economically developed areas along the eastern coast and east of the Beijing-Guangzhou Railway. The distance between the western energy supply base and the eastern energy demand center will reach 2000-3000km. The basic national conditions of my country's extremely uneven distribution of power generation energy and economic development determine that energy resources must be optimally allocated across the country. Only the construction of UHV power grids can meet the long-distance and large-capacity power transmission needs of 2,000-3,000 km from east to west and 800-2,000 km from north to south, promote local conversion of coal-fired power and large-scale development of hydropower, and realize cross-regional and cross-basin hydropower and thermal power. , Large-scale transmission of clean electric energy from the west and north to the central and eastern regions to meet the demand for electricity for my country's rapid economic development.

In addition to realizing the large-scale and long-distance transmission of electric energy, the UHV power grid can also greatly improve the safety, reliability, flexibility and economy of the power grid itself, and has significant social and economic benefits.

Although the superiority of UHV transmission is obvious to all, the popularization of UHV transmission in the country is greatly affected because the existing transmission equipment does not meet the clearance requirements of UHV transmission. Among them, the high-voltage iron tower required for UHV power transmission is an urgent problem to be solved.

Utility model content

The utility model provides an iron tower for ultra-high voltage, which solves the problem that the existing iron tower cannot meet the electric clearance requirement of ultra-high voltage power transmission.

The utility model provides an iron tower for UHV. The iron tower is a wine glass-shaped straight tower, comprising: a tower leg, and the height of the tower leg is a tower that makes the iron tower vertically installed according to the terrain where the iron tower is installed. Leg height; the tower body erected on the tower legs, the horizontal section of the tower body is rectangular; the tower head erected on the tower body includes two curved arms connected with the tower body, symmetrically placed on the The cross arm on the crank arm and the outstretched ground wire support on the side cross arm of the cross arm; the space enclosed by the middle cross arm of the cross arm and the two crank arms can surround the UHV medium-phase conductor. The first gap circle is formed, and the space enclosed by the side cross arm and the crank arm on the same side can surround the second gap circle formed by the UHV side phase conductor.

Preferably, the middle cross arm is arched.

Preferably, the protection angle of the iron tower is a negative protection angle.

Preferably, the nominal height of the iron tower is the nominal height corresponding to UHV.

Preferably, the iron tower has a nominal height of 45-81m.

Preferably, the tower height is the tower height corresponding to UHV.

Preferably, the tower is 47m in height.

Preferably, the length of the cross arm is the length of the cross arm corresponding to UHV.

Preferably, the cross arm is 50.7m long.

The iron tower for UHV of the utility model can meet the electrical clearance requirements of UHV power transmission; the wires are arranged horizontally and the arched middle arm is used to make the overall structure of the tower more compact, and the height of the whole tower is reduced; the wires form a negative protection angle, which is suitable for It is used in mountainous areas; all-round long and short tower legs are used to protect the terrain and vegetation in mountainous areas, which is beneficial to environmental protection.

Description of drawings

Fig. 1 is a schematic diagram of an embodiment of the UHV iron tower of the present invention.

Detailed ways

In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

The utility model provides an iron tower for UHV, as shown in FIG. 1 , which is an embodiment of the iron tower for UHV in the present invention. The UHV iron tower 1 is a wineglass-shaped straight tower, including a tower head 11 , a tower body 12 and tower legs 13 .

The height of the tower legs 13 is the height of the tower legs that the iron tower can be installed vertically according to the terrain of the iron tower installation site, and the height of the tower legs 13 can be all the same or partially the same, and can also be different. The height can be designed according to the terrain where the tower is actually installed. By adopting all-round long and short tower legs 13, the square of the base surface of the iron tower in mountainous areas can be reduced, without destroying the topography and vegetation in mountainous areas, which is beneficial to environmental protection.

The tower body 12 is erected on tower legs 13, and the horizontal section of the tower body 12 is rectangular. Preferably, the tower body 12 is a regular square prism.

The tower head 11 is erected on the tower body 12 and includes two curved arms 111 , a cross arm 112 and a ground wire support 113 . The two curved arms 111 are connected with the tower body 12 and directly supported on the tower body 12 .

The cross arm 112 rides symmetrically on the two curved arms 111 . The middle cross arm 1122 of the cross arm 112 is connected with a V-shaped insulator string, and the lower end of the V-shaped insulator string is connected with the UHV medium-phase conductor 21; I-type insulator strings are connected symmetrically, and the lower ends of the I-type insulator strings are connected with UHV side-phase conductors 22 . The middle phase wire 21 and the side phase wire 22 of the utility model are arranged horizontally to reduce the height of the whole tower.

The ground wire support 113 is an extension type, and the ground wire support 113 is mounted on the side cross arm 1121 of the cross arm 112, and the ground wire support 113 is hung with a lightning protection ground wire at the end far away from the side cross arm 1121 (Fig. not shown). Preferably, the protection angle of the UHV iron tower 1 in this embodiment is a negative protection angle, which can also be used normally in mountainous areas where lightning strikes are relatively frequent.

The iron tower 1 for UHV needs to meet the electrical clearance in practical application, otherwise it will cause the iron tower 1 for UHV to discharge. Therefore, the space enclosed by the middle cross arm 1122 of the cross arm 112 and the two curved arms 111 should be able to surround the first gap circle formed by the UHV medium-phase conductor 21 (as shown by the arc around the medium-phase conductor 21 in Figure 1 ), the space surrounded by the side cross arm 1121 and the same side crank arm 111 should be able to surround the second gap circle formed by the UHV side phase conductor 22, that is, the arc around the side phase conductor 22 in Figure 1, the arc The range enclosed by the line is the range of the gap circle formed by the side-phase conductor 22 when it is stationary and winded.

Preferably, the middle cross arm 1122 of the cross arm 112 is in an arched shape, which can efficiently utilize the gap space of the iron tower as much as possible while satisfying the electrical clearance of the conductors, and reduce the height of the entire tower.

For different types of UHV iron towers 1 , the included angles of the upper and lower curved arms on the same side and the included angles formed by the ground wire support 113 and the side cross arm 1121 will also be slightly different.

For different UHV, the relevant parameters of the selected tower will be adjusted according to the corresponding UHV. The nominal height H of the iron tower is the nominal height corresponding to the UHV; the tower height B is the tower height corresponding to the UHV; the cross-arm length L is the cross-arm length corresponding to the UHV.

Wherein, for a 1000kV UHV transmission line, the radius of the first gap circle between the middle phase conductor 21 and the crank arm 111 is 7.7m, and the radius of the first gap circle between the middle phase conductor 21 and the middle cross arm 1122 is 8.1m. m; the radius of the second gap circle between the side-phase conductor 22 and the crank arm 111 can be 3.1 m to 6.9 m according to the position difference of the side-phase conductor 22 . Therefore, the nominal height H of the iron tower 1 for 1000kV UHV is 45-81m; the height B of the tower is 47m; the length L of the cross arm is 50.7m; ; The height of the tower legs is 5m ~ 13m. The above dimensions may have a floating deviation of 2m according to the actual situation.

The iron tower for UHV of the utility model can meet the electrical clearance requirements of UHV power transmission; the wires are arranged horizontally and the arched middle arm is used to make the overall structure of the tower more compact, and the height of the whole tower is reduced; the wires form a negative protection angle, which is suitable for It is used in mountainous areas; all-round long and short tower legs are used to protect the terrain and vegetation in mountainous areas, which is beneficial to environmental protection.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. All modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model are included in the protection scope of the present utility model.

Claims (9)

1. An iron tower for UHV, characterized in that, the iron tower is a wine glass type linear tower, comprising: Tower legs, the height of the tower legs is the height of the tower legs that make the iron tower vertically installed according to the terrain where the iron tower is installed; The tower body erected on the tower legs, the horizontal section of the tower body is rectangular; The tower head erected on the tower body includes two curved arms connected to the tower body, a cross arm symmetrically placed on the curved arms and an extended ground wire mounted on the side cross arms of the cross arm bracket; The space surrounded by the middle cross arm of the cross arm and the two crank arms can surround the first gap circle formed by the UHV medium-phase conductor, and the space surrounded by the side cross arm and the same side crank arms can surround the UHV side. The second gap circle formed by the phase conductors. 2. The iron tower for UHV according to claim 1, wherein the middle cross arm is arched. 3. The iron tower for UHV according to claim 1, wherein the protection angle of the iron tower is a negative protection angle. 4. The iron tower for UHV according to claim 1, wherein the nominal height of the iron tower is the nominal height corresponding to UHV. 5. The iron tower for UHV according to claim 4, characterized in that the nominal height of the iron tower is 45-81m. 6. The iron tower for UHV according to claim 1, wherein the tower height is the tower height corresponding to UHV. 7. The iron tower for UHV according to claim 6, wherein the tower is 47m in height. 8. The iron tower for UHV according to claim 1, wherein the length of the cross-arm is the length of the cross-arm corresponding to UHV. 9. The iron tower for UHV according to claim 8, wherein the length of the cross arm is 50.7m.

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