大跨越输电线路防振锤和Bate阻尼线联合防振试验研究

Experiments on joint anti vibration characteristics of vibration damper and beta damping line for large crossing transmission lines

为了掌握防振锤和Bate阻尼线联合防振对大跨越输电导线微风振动的影响,基于IEEE输电导线振动测试指南,设计制作了大跨越输电导线-防振锤-Bate阻尼线联合防振体系的微风振动试验平台;分析了联合防振条件下大跨越输电导线的振动响应,研究了防振锤型号和数量对大跨越输电导线防振体系的微风振动影响。试验结果表明:防振锤和阻尼线能有效降低大跨越输电导线的振动位移,防振锤和Bate阻尼线联合消振效果优于单一的防振锤或阻尼线;在相同激励条件下,防振锤和Bate阻尼线的防振频段不同,防振锤在20Hz中频段防振效果较好,而Bate阻尼线在低频段和高频段的防振效果较好。对称型FR-4和非对称型FD-5防振锤均能有效降低导线振幅,但防振锤型号不同,其防振效果不同,FD-5型防振锤在20Hz和25Hz时消振效果稍好;防振锤的安装数量对输电线防振体系的抑振效果影响较大。

In order to grasp the influence of combined vibration protection by vibration hammer and beta damper line on the breeze vibration of long-span transmission lines, based on the IEEE guideline for vibration testing of transmission lines, a wind vibration test model of the combined system of long-span transmission lines, vibration prevention hammer and beta damper line was designed and manufactured, and the vibration response of large-spantransmission lines under combined vibration protection is studied. The influence of the type and quantity of vibration hammer on the breeze vibration of the vibration-proof system of large-span transmission lines was analyzed. The test results show that the vibration displacement of transmission line can be effectively reduced by anti-vibration hammer and damping line and the combined anti-vibration effect of anti-vibration hammer and damping line is better than that of single anti-vibration hammer or damping line. Under the same excitation conditions, the anti-vibration frequency bands of anti-vibration hammer and beta damping line are different, and the anti-vibration effect of anti-vibration hammer near 20 Hz is better, but the beta damping line is better at low frequency and high frequency. Both FR-4 and FD-5 anti-vibration hammers can effectively reduce the amplitude displacement of conductors. Different types of anti-vibration hammers have different anti-vibration effects. The anti-vibration effect of FD-5 anti-vibration hammer is better at 20 Hz^25 Hz. The number of anti-vibration hammers installed has a greater impact on the vibration of transmission line-beta damping line for anti-vibration system.