阻尼间隔棒及双摆防舞器对特高压架空输电导线覆冰舞动特性的影响  

Effect of Damping Spacers and Double-swinging Protectors on Iced Galloping Properties for UHV Overhead Transmission Lines

作　　者：赵彬[1] 程永锋[1] 王景朝[1] 刘彬[1] 陈予恕[2] 

机构地区：[1]中国电力科学研究院,北京100055 [2]天津大学机械工程学院,天津300072

出　　处：《高电压技术》2016年第12期3837-3843,共7页High Voltage Engineering

基　　金：国家自然科学基金(51678548);国家电网公司科技项目(GYB17201500154)~~

摘　　要：为了能够准确分析和评价阻尼间隔棒与双摆防舞器对大截面、多分裂特高压输电导线覆冰舞动的影响,首先依据防舞器分布特性,将二者的质量和转动惯量沿导线分布情况定义为狄拉克函数形式,再通过曲梁建模方法得到描述覆冰导线运动的常微分方程,并以6?1 250 mm2导线为例进行了非线性振动特性分析。结果表明,二者的优化参数及安装、布置方案会对特高压输电导线的分布质量、阻尼特性等结构参数产生影响,进而改变其覆冰舞动特性;对二者进行合理优化设计和配置,不仅可以提高特高压导线系统的临界失稳风速,增强其抗风能力,亦可在实际风速略大于临界失稳风速时获得良好的抑舞特性。为特高压输电线路及其金具的设计工作提供了有效的理论参考依据。As frequently-used anti-galloping devices,damping spacers and double-swinging protectors were heavily ap- plied to UHV overhead transmission lines. In order to analyze and evaluate the influence of both types of devices on galloping of iced large-section and bundled conductors, Dirac function and the modeling method of curved beam were both introduced to define their characteristic of distribution along the wire with large cross section. The results show that parameter optimization and installation would affect the distributed mass, damping characteristics, and other structure pa- rameters of UI-IV transmission line, and then it would change its galloping properties. Optimization of the design and arrangements of this kind of anti-galloping fittings could not only improve the critical wind speed of UHV conductor sys- tem to enhance its capacity of wind resistance, but also suppress vibration of UHV conductors in the situation that actual wind speed is slightly l^Lrger than the critical wind speed. It provides that theoretic reference for the optimization design as well as arrangements of anti-galloping fittings for UHV overhead transmission lines.

关 键 词：特高压输电导线阻尼间隔棒 特高压输电导线双摆防舞器 多分裂导线 大截面导线 覆冰舞动 非线性动力学 

分 类 号：TM75[电气工程—电力系统及自动化]