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Method for measuring deicing jump damping coefficients of iced power transmission line

A technology of damping coefficient and deicing jump, which is applied in the direction of measuring device, measuring mechanical impedance, measuring ultrasonic/sonic wave/infrasonic wave, etc. It can solve the problems of no experimental basis for value selection and lack of experimental data.

Inactive Publication Date: 2014-07-09
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Abstract
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Problems solved by technology

The value of damping parameters of wires should generally be measured through experiments, but the current experimental data is relatively scarce. Therefore, when studying wire dynamics at home and abroad, the selection of damping parameters is generally based on empirical values, and most values ​​have no experimental basis.

Method used

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  • Method for measuring deicing jump damping coefficients of iced power transmission line
  • Method for measuring deicing jump damping coefficients of iced power transmission line
  • Method for measuring deicing jump damping coefficients of iced power transmission line

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Embodiment Construction

[0040] The preferred embodiments of the invention will be further described in detail below.

[0041] Such as figure 1 As shown, the actual transmission line 1 is covered with ice 2, the span of the transmission line is L, the diameter of the transmission line is D, the density of ice is ρ, the thickness of the ice coating on the transmission line is b, and the transmission line is covered with ice per unit length The mass is q, in order to simulate the time-displacement curve of the transmission line when the ice falls off and jumps, such as figure 2 As shown in , it is assumed that the ice-coated mass on the transmission line is concentrated on the load points 3 with a number N, that is, each load point carries a weight 4 of corresponding mass. In one embodiment, the mass of the weight 4 carried on each load point 3 is the same, which is m:

[0042] q = ρπb ...

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Abstract

The invention discloses a method for measuring deicing jump damping coefficients of an iced power transmission line. The method comprises the following steps that a time-displacement curve under the deicing jump of the test power transmission line is measured; simulation power transmission lines identical with the test power transmission line in initial state and deicing condition are calculated according to a formula (please see the formula in the specification), and time-displacement curves under the different damping coefficients are calculated; in the time-displacement curves of the simulation power transmission lines under the different damping coefficients, the time-displacement curve of the certain simulation power transmission line close to the time-displacement curve of the test power transmission line is selected, and the damping coefficient corresponding to the time-displacement curve of the certain simulation power transmission line is used as the damping coefficient of the test power transmission line under the initial state. The method can obtain the accurate damping coefficients of the test power transmission line.

Description

【Technical field】 [0001] The invention relates to the design and testing of high-voltage transmission lines, in particular to a method for measuring the damping coefficient of ice-covered transmission lines during deicing jumps. 【Background technique】 [0002] The long-term operation of overhead transmission lines in the atmospheric environment is disturbed by non-human factors such as wind and ice. my country is the country with the most severe icing, and the probability of ice damage accidents on railway lines ranks among the highest in the world. One of the three major hazards of icing to the normal operation of transmission lines is the tension difference caused by uneven icing or deicing in different periods, which may cause phase-to-phase short-circuit tripping and flashover electrically, and cause large damage to insulator strings and towers mechanically. The unbalanced tension damages the insulator and even causes the tower to collapse, which directly threatens the ...

Claims

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Application Information

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IPC IPC(8): G01H15/00
Inventor 王黎明梅红伟孟晓波高亚云候镭傅观君汪创
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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