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Operation method for 500kV three-phase single-window single-circuit transmission line compact straight tower entering equipotential

A technology for accessing equipotential and transmission lines, applied in the direction of overhead lines/cable equipment, etc., which can solve the problems of large gaps between tower windows, difficulty in implementation, and heavy weight, and achieve the effect of less tools and easy operation

Active Publication Date: 2017-05-31
STATE GRID FUJIAN ELECTRIC POWER CO LTD +2
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AI Technical Summary

Problems solved by technology

[0004] ⑴ The gap between the iron tower and the tower window required by the slide rail hanging chair method is relatively large, and hard insulating tools such as slide rails are large in size and heavy in weight, which brings certain difficulties to the use, transportation, and transfer of the tools, making it difficult to implement
[0006] (3) When the insulating ladder method is used, the air gap of the tower window must have a large safety margin, and it is not suitable for equipotential work on wires arranged vertically with wires with a small distance between wires
[0007] ⑷ The above three equipotential methods for entering the tower window need to consider whether the combined clearance is satisfied. If the safety distance requirements for the combined clearance of live work cannot be met, live work cannot be carried out

Method used

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Embodiment Construction

[0032] Best practice:

[0033] Aiming at the particularity of the straight pole structure of the compact transmission line, the present invention provides a reasonable and safe way of entering and exiting the equipotential operation, including two schemes, namely entering the equipotential from the side phase and entering the equipotential from the middle phase. ,details as follows:

[0034] (1) The side phase enters the equipotential

[0035] (1) Ground potential electricians and equipotential electricians climb the tower to the cross arm of the overhead ground wire. If the ground wire is an insulated overhead ground wire, ground the ground wire;

[0036] (2) Ground personnel connect the ladder frame (with pulleys) to the insulating ladder and pass it on to the ground potential electrician;

[0037] (3) The ground potential electrician installs the pulley of the soft ladder head frame on the overhead ground line of the linear tower;

[0038] (4) The equipotential electrici...

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Abstract

The present invention relates to an operation method for a high voltage line entering equipotential in a construction process, and particularly relates to an operation method for a 500kV three-phase single-window single-circuit transmission line compact straight tower entering equipotential. The present invention provides the operation method for entering equipotential from a side phase and a middle phase. The operation method uses a technical solution of entering equipotential from the outside of the window, so that the security distance is much greater than a combined gap required by live operation, a problem that a conventional method cannot realize the minimum combined gap required by the operation that the three-phase single-window compact transmission line enters equipotential is solved, and an equipotential electrician is ensured to enter a strong electric field safety and reliably. Live operation tools used in the operation are light and simple, and are safe and practical. Through adoption of the operation method, the three-phase single-window compact straight tower enters equipotential. The operation method is particularly suitable for live operation of lines in mountain areas, and has the advantages of using few tools and being easy to perform.

Description

technical field [0001] The invention relates to an operation method for entering the equipotential during the construction of a high-voltage line, in particular to an operation method for entering the equipotential in a compact linear tower of a 500kV three-identical tower window single-circuit transmission line. Background technique [0002] 500kV single-circuit compact transmission lines mostly use straight towers with wires arranged in an inverted triangle. The compact power transmission technology breaks through the wire arrangement structure and layout of conventional lines, so that the three-phase wires are placed in the same tower window in an inverted triangle arrangement, which greatly reduces the phase-to-phase distance of the wires and the distance between the wires and the tower body (to the ground). The distance between livelines and livelines is greatly reduced, which brings great risks to the safety of liveliness work. [0003] Live working is one of the impo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G1/02
CPCH02G1/02
Inventor 陈君明陈兴宝陈祥信林燕明郑燕敏龚建辉
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD
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