大跨越输电导线自阻尼特性分析与试验研究  

Experimental Study on Self-damping Characteristics of Large Span Transmission Lines

作　　者：汪峰[1] 王丰[1] 黄欲成 陈池[1] 赵全江 柏晓路 WANG Feng;HUANG Yucheng;CHEN Chi;ZHAO Quanjiang;BAI Xiaolu(Hubei Key Laboratory of Disaster Prevention and Mitigation（China Three Gorges University）,Yichang 443002,Hubei Province,China;Central Southern China Electric Power Design Institute Co.,Ltd,Wuhan 430071,Hubei Province,China)

机构地区：[1]防灾减灾湖北省重点实验室(三峡大学),湖北省宜昌市443002 [2]中南电力设计院有限公司湖北省,武汉市430071

出　　处：《中国电机工程学报》2018年第19期5646-5652,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51778343);中国电力工程顾问集团有限公司科技项目(DG1-D05-2015);防灾减灾湖北省重点实验室(三峡大学)开放基金(2017KJZ07)~~

摘　　要：准确掌握导线自阻尼特性是大跨越输电线路微风振动防振减振设计的关键问题。基于导线微风振动平衡原理,提出大跨越输电导线自阻尼耗能功率计算公式,考虑导线刚度比例阻尼的作用,建立自阻尼条件下大跨越输电导线微风振动力学模型,利用分离变量法求解导线的振动方程获得其模态位移。以特强钢芯铝合金绞线AACSR/EST-500/280为试验对象,通过电磁激振器模拟微风激励力,利用非接触式电涡流传感器进行导线振动数据采样,测试导线自阻尼耗能特性曲线,并与理论结果进行对比分析。在此基础上,研究运行张力、抗弯刚度对大跨越导线自阻尼耗能的影响。结果证明了导线自阻尼理论公式计算结果的准确性,以及自阻尼理论公式的正确性;另外也证明：导线材料抗弯刚度越大,导线自阻尼耗能增大,导线波腹处的振幅呈现减小趋势;随着导线张力的增加,输电导线自阻尼功率减小,导线波腹处的振幅呈增大趋势。It is the key issue for anti-vibration of the large span transmission lines to accurately grasp the self-damping characteristics of the conductor. Based on the balance principle of conductor aeolian vibration, the calculation formula of self-damping power of transmission lines was proposed. Considering the wire stiffness proportional damping effect, Aeolian vibration mechanics model of large span transmission conductor was established under the self-damping conditions. The vibration equation was solved by the method of separation of variables to obtain the modal displacement. Taking the ultrahigh strength steel cored aluminum strand AACSR/EST- 500/280 as the example, breeze excitation force was simulated by electromagnetic vibration exciter, and wire vibration data was collected using noncontact eddy current sensor, which test self-damping power curve. Test results were compared with the theory. On this basis, the influence of running tension and bending rigidity was studied on the self-damping energy dissipation of long span transmission lines. The results show that the theoretical calculation results of conductor self- damping agree well with the experimental data, and verify the correctness of the theoretical formula of self-damping; With the increase of the wire tension, conductor self-damping power decreases, the amplitude of the wire increases; the greater the bending stiffness of wire material, conductor self-damping energy increases, the amplitude of the wire decreases.

关 键 词：大跨越输电导线 自阻尼特性 模拟试验 钢芯铝合金绞线 

分 类 号：TM75[电气工程—电力系统及自动化]