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Super/ultrahigh voltage alternating and direct-current mixed compression line live-line work equipotential transfer safety method

A live work, equipotential technology, applied in the direction of overhead lines/cable equipment, etc.

Active Publication Date: 2012-04-04
STATE GRID ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, what the patent No. 200710169042.8 provides is the access method and special tool for EH / UHV AC line workers from the ground potential to the high potential.

Method used

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  • Super/ultrahigh voltage alternating and direct-current mixed compression line live-line work equipotential transfer safety method
  • Super/ultrahigh voltage alternating and direct-current mixed compression line live-line work equipotential transfer safety method
  • Super/ultrahigh voltage alternating and direct-current mixed compression line live-line work equipotential transfer safety method

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Embodiment Construction

[0017] figure 1 Explanation of marks: iron tower 1, insulator 2, voltage equalizing ring 3, upper layer DC ±800kV line conductor 4, lower layer AC 500kV line conductor 5.

[0018] figure 2 Explanation of the marks: D1—the distance between the operator and the conductor of the lower AC 500kV line when the upper DC ±800kV line is at the same potential.

[0019] image 3 Explanation of the marks: Insulated carrier 6, S1—the distance between the operator and the upper DC ±800kV line conductor during the transfer process, S2—the distance between the operator and the lower AC 500kV line conductor during the transfer process.

[0020] Figure 4 Explanation of the mark: D2—is the distance between the operator and the conductor of the upper DC ±800kV line when the lower AC 500kV line is at the same potential.

[0021] see figure 1 , the present invention's EHV / UHV AC / DC mixed line live working equipotential transfer safety method is applicable to such as figure 1 The upper layer...

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Abstract

The invention provides a super / ultrahigh voltage alternating and direct-current mixed compression line live-line work equipotential transfer safety method, which comprises the following steps that the distance between an operator and a lower layer of alternating-current 500kV line conductor is kept between 7.3-14.6m, when the operator is at an upper layer of direct-current plus or minus 800kV line which is equipotential; the operator utilizes an insulating carrier tool to transfer from the upper layer of direct-current plus or minus 800kV line to a lower layer of alternating-current 500kV line, and in the transfer process, the sum of the distance between the upper layer of direct current plus or minus 800kV line conducting wire and the operator and the distance between the operator and the lower layer of alternating current 500kV line conducting wire is kept between 8.1-14.6m; and when the lower layer of alternating current 500kV line is equipotential, the distance between the operator and the upper layer direct current plus or minus 800kV line conducting wire is kept between 7.3-14.6m, when the operator is at the lower layer of alternating current 500kV line which is equipotential. According to the method, the operator can safely enter the lower layer of alternating current 500kV line from the upper layer of direct current plus or minus 800kV line.

Description

technical field [0001] The invention relates to a high-voltage transmission line, in particular to a safety method for equipotential transfer of a super / ultra-high voltage AC / DC mixed voltage line for live work. Background technique [0002] EHV / UHV AC / DC mixed voltage multi-circuit transmission line on the same tower belongs to a new type of transmission line in my country, such as figure 1 As shown, the transmission line is divided into two parts: the upper ultra-high voltage DC ±800kV line and the lower ultra-high voltage AC 500kV line. It has the characteristics of large transmission capacity, reduced power corridors, and long transmission distance. It will be constructed and put into use in East my country. [0003] When the transmission line fails, it is necessary to detect, repair or modify the transmission line. In order not to affect the power supply, the transmission line does not interrupt the power supply, and the staff carry out live work. [0004] In the live ...

Claims

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Application Information

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IPC IPC(8): H02G1/02
Inventor 刘凯彭勇刘庭肖宾刘艳苏梓铭
Owner STATE GRID ELECTRIC POWER RES INST
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