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Method for suppressing dancing and alternate flashover of single-lead transmission line

A technology for transmission lines and single conductors, which is applied to the device for maintaining the distance between parallel conductors, the space arrangement/configuration of cables, etc., to achieve the effect of good dance prevention and phase-to-phase flashover suppression

Active Publication Date: 2010-12-22
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method of installing interphase spacers has two major disadvantages. One is to install the interphase spacers at the midpoint of the span, which happens to be the wave node of the second-order mode. The second is to install the interphase spacers at the span 1 / 3 of , exactly the wave node of the third-order mode

Method used

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  • Method for suppressing dancing and alternate flashover of single-lead transmission line
  • Method for suppressing dancing and alternate flashover of single-lead transmission line
  • Method for suppressing dancing and alternate flashover of single-lead transmission line

Examples

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Embodiment Construction

[0025] The process of using the above method to arrange interphase spacers of single-conductor transmission lines is now introduced with specific examples.

[0026] For a 66kV single-conductor transmission line, the conductor type is LGJ-240, the thickness of the ice is 30mm, the distance between phases is 3m, the amplitude of galloping reaches 5m, and the control span is 10-20#. The specific span values ​​are as follows:

[0027]

[0028] Due to the thicker ice thickness, smaller distance between phases and larger galloping amplitude, the arrangement of installing 2 interphase spacers when the span is less than 160m, and installing 4 interphase spacers when the span is ≥160m is adopted. If the span of 155m is less than 160m, use 2 interphase spacers, which are respectively arranged at 1 / 4 of the upper phase-middle phase, which is 39m away from the small tower, and 2 / 3 of the middle phase-lower phase, which is 103m away from the small tower 186 with a span greater than 160m...

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Abstract

The invention relates to a method for suppressing the dancing and the alternate flashover of a single-lead transmission line, belonging to the field of electrical failure prevention and control of transmission lines. The method comprehensively considers the influences of all stages of waveforms while the transmission line dances and proposes a method for mounting alternate spacers on a cross section vertical to the lead in a staggering way; and compared with the traditional method for mounting the alternate spacer, the method of the invention can better prevent dancing and suppress alternate flashovers.

Description

technical field [0001] The invention relates to a method for suppressing galloping phase-to-phase flashover of a single-conductor transmission line, which belongs to the field of prevention and control of electric faults of transmission lines. Background technique [0002] Eccentric ice-coated conductors will produce low-frequency, large-amplitude galloping under the action of steady wind, which will cause great damage to transmission lines. It is very necessary to carry out the prevention and control of transmission line galloping. my country is a country where galloping frequently occurs. Large-scale galloping has occurred in Liaoning, Hubei, Henan and other strong galloping areas successively, causing accidents such as line disconnection, tripping and power outages. Compared with split-conductor transmission lines, single-conductor transmission lines are more prone to phase-to-phase flashover accidents when galloping occurs in winter and early spring because of the small ...

Claims

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Application Information

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IPC IPC(8): H02G7/12H02G7/20
Inventor 任西春朱宽军杨凤利
Owner CHINA ELECTRIC POWER RES INST
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