technology for electrified overhaul of +-500kV double-circuit direct-current power transmission lines on same tower

A DC transmission line, live maintenance technology, applied in the direction of overhead lines/cable equipment, etc., can solve the problem of not being able to meet the needs of ±500kV dual-circuit DC line maintenance on the same tower

Active Publication Date: 2014-03-05
STATE GRID CORP OF CHINA +1
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  • Summary
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Problems solved by technology

Therefore, the traditional operation method cannot meet the needs of ±500kV dual-circuit DC line maintenance on the same tower

Method used

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  • technology for electrified overhaul of +-500kV double-circuit direct-current power transmission lines on same tower
  • technology for electrified overhaul of +-500kV double-circuit direct-current power transmission lines on same tower
  • technology for electrified overhaul of +-500kV double-circuit direct-current power transmission lines on same tower

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Embodiment Construction

[0021] In order to better understand the present invention, the invention will be described in detail below in conjunction with the accompanying drawings and specific examples.

[0022] Before the technical scheme of the present invention is introduced in detail, at first the theoretical basis of the project research is briefly stated:

[0023] (1) According to the ±500kV DC double-circuit line on the same tower provided by Zhongnan Electric Power Design Institute and other design units, the tower structure, insulator string type, fitting connection form, ground wire layout, line mechanical load level and air gap form;

[0024] (2) Based on the analysis and calculation of the overvoltage level of the ±500kV double-circuit DC transmission line on the same tower by the State Grid Electric Power Research Institute and the research on the live working gap test of the ±500kV double-circuit DC line on the same tower, the proposed ultra-high voltage double-circuit on the same tower T...

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Abstract

The invention provides a technology for electrified overhaul of +-500kV double-circuit direct-current power transmission lines on the same tower. The operation method entering equal potential comprises the following steps that an equal potential worker and a ground potential worker carry an insulated conveying rope to climb the tower to a ground wire support to tie a safety belt, and install an insulation pulley and the insulated conveying rope on the ground wire support for operation; ground workers pass an insulated soft ladder and insulated soft ladder hangers to the position of the ground potential worker; the ground potential worker dismounts a damper of an overhead ground wire at the working side, and installs the soft ladder hangers on the overhead ground wire reliably; after the equal potential worker checks that all the parts of shield clothes are connected well, the equal potential worker ties an insulated protecting rope, goes to the insulated soft ladder to stand and tie the safety belt on the insulated soft ladder; the ground workers use tail ropes of the insulated soft ladder for swinging the insulated soft ladder and when the distance between the equal potential worker and electrified conducting wires is about 0.5 m, the equal potential worker quickly grabs the conductive wires and carries out potential transfer. The technology for electrified overhaul of the +-500kV double-circuit direct-current power transmission lines on the same tower fills the gaps in domestic and foreign ultra-high direct-current electrified overhaul technology.

Description

【Technical field】 [0001] The invention relates to the field of ultra-high voltage power transmission and transformation, in particular to a live maintenance process for a ±500kV double-circuit direct current transmission line on the same tower. 【Background technique】 [0002] Transmission line operation, maintenance and repair work is an important means to grasp the operation of the power grid, discover and deal with equipment defects in time, and is also the basic work to ensure the safe and stable operation of the line. Since the ultra-high voltage power grid is at the core of the operation of the entire national grid, the operation and maintenance of the ultra-high voltage power grid is of great significance to ensure the safe, stable and reliable operation of the ultra-high voltage power grid and even the entire national grid. [0003] The Ge-Shanghai DC comprehensive transformation, that is, the ±500kV Genan Line (Linfeng Line) same-tower double-circuit DC power transmi...

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Application Information

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IPC IPC(8): H02G1/02
CPCH02G1/02
Inventor 余雷刘越汤正汉向文祥刘继承王星超
Owner STATE GRID CORP OF CHINA
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