Insulator equalizing ring configuration structure of same-tower same-window double-loop compact transmission line

A transmission line and configuration structure technology, applied in the direction of circuits, insulators, cable suspension devices, etc., can solve the problems that the pressure equalizing ring configuration structure has not been seen in public reports, etc., to achieve the suppression of corona and electric erosion, and uniform electric field distribution The effect of rationalization and configuration structure

Inactive Publication Date: 2010-04-28
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, since the 750kV double-circuit compact transmission line on the same tower and the same window is still in the research and construction stage, there is no public report on the configuration structure of its equalizing ring

Method used

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  • Insulator equalizing ring configuration structure of same-tower same-window double-loop compact transmission line
  • Insulator equalizing ring configuration structure of same-tower same-window double-loop compact transmission line
  • Insulator equalizing ring configuration structure of same-tower same-window double-loop compact transmission line

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Embodiment 1

[0028] In this embodiment, the 750kV transmission line is taken as an example, and the double composite insulator string is used as the composition figure 1 The side string 12 and the middle string 13 of the middle U-shaped structure, the specific structure and the connection relationship of the side string 12 and the middle string 13 are as follows figure 2 , image 3 and Figure 4 Shown:

[0029] see figure 2 or image 3 , the three double-connected composite insulator strings are connected into a U-shaped structure 11 through the multi-split wire fittings 4 and the double-connected plate fittings 5 ​​connected to the two ends of the multi-split wire fittings 4, and the double-connected composite insulator strings are arranged at one end close to the transmission wire 8 There are double-ring structure voltage equalizing rings with large and small voltage equalizing rings. The specific structure of the double-ring structure voltage equalizing rings is: U-shaped structur...

Embodiment 2

[0034] This embodiment takes a 750kV transmission line as an example, with porcelain or glass insulator strings as the composition figure 1 The side string 12 and the middle string 13 of the middle U-shaped structure, the specific structure and the connection relationship of the side string 12 and the middle string 13 are as follows Figure 5 Shown:

[0035] see Figure 5 , when the line insulator string 2 is porcelain or glass insulator string 14, a single large runway ring 3 is arranged between the second and third insulators on the transmission wire side, on the one hand, the main capacitance of the insulator string is increased, so that the insulator string is affected by stray The influence of capacitance is reduced, and the distributed voltage is uniform; on the other hand, it shields the high electric field at the insulator steel cap, steel foot and cement on the wire side. The large runway ring 3 is connected to the fittings with a bracket, and is equipotential with ...

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Abstract

The invention discloses an insulator equalizing ring configuration structure of a same-tower same-window double-loop compact transmission line, which comprises insulator strings arranged in a racket-shaped tower window and is characterized in that the insulator strings are connected to form three U-shaped structures, wherein each U-shaped structure is formed by connecting three insulator strings through multiple conductor hardware fittings; the three U-shaped structures are suspended in the racket-shaped tower window in upper, middle and lower layers; and each insulator string is a compound insulator string, one end of the duplex compound insulator string near the transmission conductor is provided with a double-ring equalizing ring, and one end near the tower side is provided with a single-ring equalizing ring. The equalizing ring configuration can equalize the electric field distribution of the compound insulator string in the same-tower same-window double-loop compact racket-shaped tower, prevent the corona discharge and the electrical erosion on the high-voltage side of the compound insulator string and enhance the operating reliability of the same-tower same-window double-loop compact transmission line.

Description

technical field [0001] The invention belongs to the technical field of external insulation of ultra-high-voltage AC transmission lines, and in particular relates to a configuration structure of pressure equalizing rings for insulators of double-circuit compact transmission lines with the same tower and the same window. For ground insulation, the equalizing ring is arranged on the wire side and the tower side of the insulator, which plays a role in uniform electric field distribution of the insulator. Background technique [0002] With the continuous and rapid development of my country's economy, the contradiction between supply and demand of electric energy is becoming increasingly acute. China's natural conditions and the distribution characteristics of energy and load centers make ultra-long-distance and ultra-large-capacity power transmission inevitable. In order to increase transmission capacity and save precious Land resources require a cost-effective ultra-high voltage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B17/48H01B17/44H02G7/00H02G7/05
Inventor 彭宗仁李靖谢天喜黄宗君孙强朱岸明
Owner XI AN JIAOTONG UNIV
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