大截面导线及地线防振方案设计及试验

以大埔电厂—嘉应站输电线路工程梅江河跨越段为例,论述了工程采用的大截面导线及地线微风振动试验研究的过程和原理,从防振锤防振、阻尼线防振、阻尼线与防振锤联合防振三个方面对大跨越的多种不同的防振方案进行了试验研究,并提出了合理的防振方案。试验结果表明,防振锤的个数对导线的振动水平影响很大,长阻尼线花边对低频的防振效果较短阻尼线花边显著,阻尼线对高频的防振效果良好,防振锤与阻尼线联合防振可发挥防振锤与阻尼线的特点,防振效果比较理想。优选的防振方案满足技术要求,具有良好的防振效果,能够显著降低导地线的微风振动水平,可保证大跨越导地线的安全运行。

Damping Scheme Design and Test of Large Cross-Section Conductor and roundwire

This paper presents the process and principle of aeolian vibration test on a conductor and a groundwire at 220 kV crossing segment of Meijiang river, which is included in the project of transmission line from Dabu power plant to Jiaying substation. The tests were designed and carried out to investigate the anti-vibration property of stockbridge dampers and wire dampers to propose a reasonable anti-vibration scheme. The test results indicate that the number of stockbridge dampers has great impact on the vibration level; the anti-vibration effect of wire dampers depends on its length; the scheme combined stockbridge dampers with wire dampers has an ideal effect. The selective damping scheme has an evident damping effect on the vibration level reduction. So, it can ensure the operating safety of the large crossing conductor and groundwire.