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500kv large-span support type tubular bus

A pipe busbar and supporting technology, which is applied in the direction of semi-enclosed busbar devices, can solve the problems of large deflection of large-span supported pipe busbars, and achieve the effects of strong radio interference capability, reduced overall deflection, and simple structure

Inactive Publication Date: 2012-05-30
HENNAN ELECTRIC POWER SURVEY & DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention mainly solves the technical problem of excessive deflection of the large-span supported pipe busbar, and provides a 500kV large-span supported pipe bus that meets technical requirements such as deflection, has a simple structure, clear layout, convenient installation, and small operation and maintenance workload. Tube bus

Method used

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  • 500kv large-span support type tubular bus
  • 500kv large-span support type tubular bus
  • 500kv large-span support type tubular bus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The 500 kV support tube busbar is a kind of busbar under the voltage level of 500 kV, such as figure 1 The confluence busbar shown is only one phase, and the busbar is composed of three phases A, B, and C. The three phases are generally exactly the same, arranged side by side and horizontally, and the distance is generally 6-7m. The length of the supporting tube mother is different, and it is generally expressed by the number of spans and the span. in figure 1 The one shown is 5 spans with a span of 28 meters. In practical applications, the busbar may generally have 4 to 10 spans.

[0034] Usually, when calculating the deflection of pipe parent, the calculation formulas for distributed and concentrated loads are as follows:

[0035]

[0036]

[0037] Among them, A 1 、A 2 is the internal force coefficient of the continuous beam, E is the modulus of elasticity, J is the moment of inertia, L js is the effective span of pipe mother, q 分布 = S 截面 ×ρ 线密度 .

[00...

Embodiment 2

[0061] The difference between this embodiment and Embodiment 1 is that, on the basis of Embodiment 1, this embodiment adds a pipe mother telescopic fitting 6, and the above pipe mother telescopic fitting 6 is set at the expansion and contraction position of the pipe bus 1 due to the expansion and contraction of the temperature difference. The two tube mothers are electrically connected to pass current.

[0062] like figure 2 , Image 6 As shown, the above-mentioned duct bus telescopic fitting 6 is arranged between two sections of bus bars 1, and it is composed of at least six soft wires, which are evenly distributed in a lantern shape, and the number of soft wires can be set according to actual needs, namely It can be six, eight, ten or even more. Specifically, eight flexible conductors are arranged between the two sections of pipe busbar 1, and the eight flexible conductors are evenly distributed in a lantern shape, as shown in Image 6 As shown, the angle between the two...

Embodiment 3

[0066] The difference between this embodiment and the above-mentioned embodiments is that, on the basis of Embodiments 1 and 2, this embodiment also adds a bracket type damper, and when the pipe bus 1 vibrates, frictional damping is generated to eliminate the breeze vibration of the pipe bus , while effectively reducing breeze vibrations. In addition, the bracket type vibration absorber is mainly supported by the post insulator 5, which is different from other vibration absorbers by the pipe mother, so the deflection of the pipe mother can be reduced.

[0067] like figure 2 As shown, in this embodiment, the bracket type damper includes a damper body 7 , the two ends of the damper body 7 are connected with friction plates 8 , and the friction plates 8 are connected with the pipe bus 1 . Among them, the two ends of the damper body 7 are provided with clamps. When the pipe bus 1 vibrates up and down, the "claws" at both ends of the damper body 7 grab the friction plate 8, and t...

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Abstract

The invention discloses a 500kV large-span support type tubular bus comprising tubular buses, wherein a support tube is arranged between every two tubular buses and is positioned in each tubular bus; and at least two circles of balls are arranged between each support tube and each section of tubular bus, and the support tubes are fixed at the upper ends of pillar insulators below the tubular buses through a fixing hardware tool. The 500kV large-span support type tubular bus has the advantages that: 1, the deflection of the large-span support type tubular bus meets the specified requirement under wind-free and ice-free conditions; 2, the support points of the tubular buses are articulated with each other so that the bending moments and the torques of the small pillar insulators can be reduced under various working conditions without adopting a bracket; and 3, the integral support tubular bus has simple structure and convenient installation. Eight flexible conducting wires of a telescopic connecting device are in a lantern shape so that the 500kV large-span support type tubular bus has strong corona resistance and radio interference resistance and good shielding performance, and a grading ring does not need to be arranged in the position; and in addition, the telescopic connecting device is integrally fixed by only one fixing hardware tool.

Description

technical field [0001] The invention belongs to a power distribution device component, in particular to a high-power busbar applied in substations, switching stations and power plants. Background technique [0002] The 500kV aluminum tube main power distribution device has many advantages and has become the main form adopted by the 500kV substation. There are two types of installation: suspension type and support type, both of which have their own advantages and applicable situations. Compared with the suspended pipe nut, the supporting pipe nut has the following advantages: simple and clear layout, less flashover points, small supporting steel structure, a lot of steel cost savings, less land occupation, and wider adaptability. From the 1990s to the beginning of this century, there were about nine 500kV substations in my country that used supporting pipe mothers with a span of 28m or 27m. Due to various reasons, after the implementation of the above supporting pipe mothers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G5/04
Inventor 曹志民张继军顾尔重李国田连辉吴超一
Owner HENNAN ELECTRIC POWER SURVEY & DESIGN INST
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