Power transmission line wind vibration control method based on simulated random gust field calculation

Abstract

A power transmission line wind vibration control method based on power transmission line iron tower and lead or ground wire integrated system model calculation and multi-dimensional random gust field simulation includes the steps: firstly, generating a wind load time history sample by the aid of harmonic synthesis to simulate a wind field based on a multi-dimensional random vibration theory; secondly, establishing a dynamic model of an integrated system of a tower, lead or ground wire and wind vibration control device, analyzing the initial state of a lead or a ground wire and setting boundary conditions of the model; thirdly, converting wind load into wind pressure, loading a power transmission tower and line system and calculating time history of axial stress and displacement of an iron tower rod by the aid of simulation software; and fourthly, analyzing and judging wind vibration strength and wind vibration suppression effects and improving control effects by the aid of an optimization scheme. On the basis of rigid-flexible dynamic coupling among a power transmission line tower, the lead and the ground wire and fluid-solid coupling between a random gust wind field and a tower and lead or ground wire system structure, the determined wind vibration control method has better implementation effects.

Description

technical field [0001] The invention relates to a control method for transmission line wind vibration based on simulated random gust field calculation. Background technique [0002] The transmission line is the main component of electric energy transmission in the power grid, and the normal and safe operation of the transmission line is an important guarantee to avoid major accidents in the power grid. As the support body of the transmission line, the tower-conductor / ground wire system is a complex coupling system with strong nonlinearity composed of wires, insulators and transmission towers. The transmission tower is a tall and flexible structure, which is sensitive to dynamic loads such as wind loads and is prone to large dynamic responses. The destruction of the transmission tower system will lead to the paralysis of the power supply system, which will not only seriously affect the production, construction and living order, but also cause secondary disasters, causing ser...

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Problems solved by technology

However, the existing methods still have major limitations: (1) The coupling effect of the tower-guide/ground wire system and the wind vibration control device is not considered comprehensively; (2) The randomness of the wind field is not considered

China's famous patent "on-line monitoring device and method for high-voltage line breeze vibration based on vibration power generation" (patent number CN 102288

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