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Phase-to-phase limit live working method of double-circuit transmission lines on the same tower

A technology for transmission lines and double circuits on the same tower, which is applied to overhead lines/cable equipment, and multi-phase network asymmetry reduction. Good performance and insulation performance, easy to carry and disassemble

Active Publication Date: 2022-05-17
PINGDINGSHAN POWER SUPPLY ELECTRIC POWER OF HENAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above two methods cannot solve the problem of live work. Due to the influence of the weight of the human body and the weight of related work tools, the combined gap cannot meet the requirements of live work.

Method used

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  • Phase-to-phase limit live working method of double-circuit transmission lines on the same tower
  • Phase-to-phase limit live working method of double-circuit transmission lines on the same tower
  • Phase-to-phase limit live working method of double-circuit transmission lines on the same tower

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Effect test

Embodiment 1

[0040] refer to Figure 1-2 , this embodiment provides a method for interphase limit live operation of double-circuit transmission lines on the same tower. When performing maintenance work on the upper phase conductors, it is necessary to install " "Triangle" limit stop arm support device 5; when performing maintenance work on the middle-phase conductor, it is necessary to install the "Ⅰ" word limit stop arm support device 4 between the middle and lower phase conductors to ensure that the personnel shift positions during equipotential work The combined clearance meets the requirements throughout the entire process of the job.

[0041] Equipotential operation by means of limit method of support from the central middle phase "Ⅰ": This operation method is mainly used between the middle and lower phases when the middle phase conductors of the multi-circuit transmission line of 110kV-220kV on the same tower cannot carry out the conventional equipotential work method. It is an oper...

Embodiment 2

[0046] Such as Figure 3-6 As shown, this embodiment provides the support device for the limit arm in Embodiment 1, and the support device for the limit arm includes a support ladder and clamping mechanisms 6 arranged at both ends of the support ladder.

[0047] The clamping mechanism 6 includes a base, a support module and a clamping module arranged on the base, and the support module includes a support rod 13 arranged on the base and a support plate arranged on the support rod 13 12.

[0048] The clamping module includes an electric jaw 11 arranged on the support plate 12, an inverted U-shaped guide rail 10 arranged on the top of the support plate 12 and a motor 15 arranged on the base; the electric jaw The bottom of 11 is provided with the air cylinder 14 that is connected with described motor 15.

[0049] The base includes a triangular bottom plate 17 and a connecting pipe 18 arranged below the bottom plate 17 .

[0050] The support ladder includes an insulating rod 7 c...

Embodiment 3

[0062] This embodiment provides a limit arm support device, which is an improvement on the basis of Embodiment 2: the bottom plate 17 has a triangular structure, and two trapezoidal through holes 16 are arranged on it. The pipe wall of the connecting pipe 18 is provided with a pair of circular through holes along the diameter direction, and the bolts 19 are arranged in the circular through holes. The end of the inverted U-shaped guide rail 10 that is not connected to the support plate 12 is inclined outward.

[0063] The triangular bottom plate is a stable structure, and the connecting pipes 18 are arranged on three corners. The trapezoidal through hole 16 saves material and reduces weight on the one hand, and facilitates handling on the other hand. The pipe wall is provided with a pair of circular through-holes along the diameter direction, and bolts are arranged in the circular through-holes. On the one hand, it is convenient to connect to other supporting structures, and o...

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Abstract

The invention provides a phase-to-phase limit live operation method for double-circuit transmission lines on the same tower, which belongs to the technical field of multi-circuit transmission lines on the same tower. The limit arm support device is installed between the lower and lower phase conductors; when the middle phase conductor is overhauled, it is necessary to install the limit arm support device between the middle and lower phase conductors. The live working technology at any position in the same tower multi-circuit line stall of the present invention is the development trend of live line work in the future, meets the requirements of peer benchmarking and power supply reliability, solves existing problems, improves live work efficiency, and reduces The probability of power outages in the power grid is conducive to the development of condition-based maintenance of transmission lines. At the same time, it also fills the blank of live work at any position in the multi-circuit line stalls of 110kV‑220kV on the same tower, making outstanding contributions to the healthy development of the power grid.

Description

technical field [0001] The invention relates to the technical field of multi-circuit power transmission lines on the same tower, in particular to a method for live-line work of phase-to-phase limitation of double-circuit power transmission lines on the same tower. Background technique [0002] In recent years, the proportion of multi-circuit transmission lines on the same tower has increased year by year. According to the requirements of anti-galling control of transmission lines, the east-west lines are basically installed with interphase spacers. In recent years, these interphase spacers have been gradually exposed during the operation process: the end of the spacer is falling off, the composite material of the umbrella skirt and the rod is aging, and the hydrophobicity is reduced. Follow-up needs to be replaced in batches on a regular basis. Due to the impact of peer benchmarking and power supply reliability, it is difficult to eliminate power outages and replace them in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G1/02
CPCH02G1/02Y02E40/50
Inventor 周乐超赵元林岐召阳肖春伟宋海刚孙君录申思勉范松坡刘江川吕慧洲
Owner PINGDINGSHAN POWER SUPPLY ELECTRIC POWER OF HENAN
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