A corona test method for the effect of direct current transmission lines on adjacent trees

A DC transmission line, corona test technology, applied in the direction of testing the dielectric strength, etc., can solve the problem of line investment cost, increase the distance between the wire and the tree crown, etc., to control engineering investment, protect forest resources and ecological environment, and avoid strong electricity halo burn effect

Active Publication Date: 2011-12-14
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Therefore, when designing a DC transmission line, a sufficient distance should be left between the line and the tree,

Method used

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  • A corona test method for the effect of direct current transmission lines on adjacent trees
  • A corona test method for the effect of direct current transmission lines on adjacent trees
  • A corona test method for the effect of direct current transmission lines on adjacent trees

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Embodiment Construction

[0013] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0014] Such as figure 1 , figure 2 Shown, the corona test device that the dc transmission line of the present invention affects adjacent to trees comprises a mobile lifting platform 1, a container 2, a test tree 3, a positive lead 4 of a test line section, a negative lead 5 and an ultraviolet imager (not shown in the figure Out), wherein, the positive lead wire 4 and the negative lead wire 5 are arranged in parallel along the horizontal plane.

[0015] The mobile lifting platform 1 is used to carry the test tree 3 placed in the container 2, and the distance between the test tree 3 and the positive lead wire 4 and the negative lead lead 5 is adjusted by the mobile lifting platform 1 . The lifting stroke of the mobile lifting platform 1 is set according to the height of the test tree and the distance to the ground of the positive lead wire 4 and the ...

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Abstract

The invention relates to a corona test method for effect of direct current transmission line on adjacent trees, which comprises the following steps of: (1) arranging a corona test device for the effect of direct current transmission line on adjacent trees, which comprises a travelling lifting platform, a container, a test tree, positive and negative wires and a ultraviolet imager; (2) planting the test tree in the container; (3) placing the travelling lifting platform under the test line ; (4) arranging the test tree on the travelling lifting platform, connecting the root of test tree with ground by a grounding wire; (5) changing distances between the test tree and the positive and negative wires; (6) supplying power to the test line by a direct current test power supply; (7) observing corona phenomenon of a crown of the test tree in the electric field by the ultraviolet imager to obtain minimum vertical distance of the direct current transmission line and the tree at the beginning of the obvious corona phenomenon. By adopting the method, the forest resource and the ecological environment can be effectively protected, the project investment can be controlled; and the method can be widely used in the forest industry in the high-voltage project and the forest protection.

Description

technical field [0001] The invention relates to a corona test method, in particular to a corona test method for the influence of a DC transmission line on adjacent trees. Background technique [0002] The minimum vertical distance between DC overhead transmission lines and trees should not only meet the safe operation requirements of transmission lines, but also consider the abnormal ecological effects that may occur when trees are adjacent to transmission lines. Trees growing under the strong electric field below the DC transmission line may have coronas on the tree crowns adjacent to the wires; when the trees are close to the wires to a certain extent, burns may occur on the ends of the trees. Therefore, when designing a DC transmission line, a sufficient distance should be left between the line and the tree, but blindly increasing the distance between the wire and the tree crown will cause unnecessary line investment costs. Since the corona phenomenon in the crown of the...

Claims

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Application Information

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IPC IPC(8): G01R31/12
Inventor 薛辰东陆家榆郭剑杨勇鞠勇韩辉赵龙赵鹏
Owner CHINA ELECTRIC POWER RES INST
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