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Design method of damping power vibration absorber for restraining wind deflection of power transmission line insulator string

A technology of dynamic vibration absorbers and insulator strings, applied in the direction of mechanical vibration attenuation devices, etc., can solve problems such as the limitation of wind deflection effect, achieve the effect of ensuring power supply reliability, reducing the number of wind deflection trips, and improving the stability of the power grid

Inactive Publication Date: 2015-05-20
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

At present, the method of adding heavy hammers to the insulator strings is used to prevent wind deflection discharge, but when the wind speed exceeds the design wind speed, the effect of wind deflection prevention is limited

Method used

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  • Design method of damping power vibration absorber for restraining wind deflection of power transmission line insulator string
  • Design method of damping power vibration absorber for restraining wind deflection of power transmission line insulator string
  • Design method of damping power vibration absorber for restraining wind deflection of power transmission line insulator string

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Embodiment Construction

[0034] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0035] The device that uses an additional system to absorb the vibration energy of the main system to reduce the vibration of the main system is called a dynamic vibration absorber. The principle of the insulator string damping absorber method is as follows: figure 1 . Such as figure 1 As shown, the stiffness of the transmission line insulator string is K, the mass is M, the mass of the dynamic vibration absorber is m, the stiffness is k, and the damping of the vibration absorber is c, then the insulator string of the main vibration system and the mass block of the damping vibration absorber correspond to The amplitude of is:

[0036] A = X st ( 2 βf ) ...

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Abstract

The invention discloses a design method of a damping power vibration absorber for restraining the wind deflection of a power transmission line insulator string. The method comprises the following steps: selecting the mass of the vibration absorber according to the mass and inherent frequency of the power transmission line insulator string, and computing the mass ratio of the insulator string to the vibration absorber; determining an optimal tuning frequency ratio; determining the spring rigidity of the vibration absorber according to the optimal tuning frequency ratio; computing the viscous damping coefficient of the power vibration absorber; determining the maximum amplitude of the power transmission line insulator string; designing the vibration absorber according to the determined spring rigidity of the vibration absorber, the viscous damping coefficient and the maximum amplitude parameter of the power transmission line insulator string. The method has the beneficial effects that the influence of wind deflection vibration on lead and insulator string loading caused by power transmission line external loading can be effectively prevented, and the state overhauling requirement is met; the method plays great positive roles in maintaining the line running safety, reducing wind deflection tripping times, ensuring the power supply reliability and enhancing the power grid stability.

Description

technical field [0001] The invention relates to a design method of a damping dynamic shock absorber for suppressing the wind deflection of an insulator string of a power transmission line. Background technique [0002] The power transmission conductor is suspended by the suspension insulator string on the cross arm and the clamp or pulley at the lower end. This wiring method is widely used in transmission lines. In high-voltage transmission lines, the string length of the suspension insulator string is relatively long, and its stability is poor, and it is very sensitive to swing under the action of wind load. When there is a horizontal horizontal wind load or a horizontal horizontal component of the wire acting on the suspension insulator string, the suspension insulator string will have a lateral deflection; this deflection will change the electrical gap between the jumper and the tower, if the gap cannot meet the tolerance Under the minimum distance required by the voltag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G7/14
CPCH02G7/14
Inventor 段玉兵胡晓黎雍军杨波孙晓斌孟海磊张皓
Owner STATE GRID CORP OF CHINA
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