Response Characteristics and Frequency-domain Calculation Method of Dynamic Wind-induced Deflection of Transmission Lines

被引：0
|
作者：
Lou W. [1 ]
Luo G. [1 ]
Yang X. [2 ]
Lu M. [2 ]
机构：
[1] Institute of Structural Engineering, Zhejiang University, Hangzhou
[2] Key Laboratory of Power Transmission Line Galloping Prevention and Control Technology, Electric Power Research Institute, State Grid Henan Electric Power Company, Zhengzhou
来源：
Lou, Wenjuan (louwj@zju.edu.cn) | 1600年 / Science Press卷 / 43期
基金：
中国国家自然科学基金;
关键词：
CQC; Dynamic wind-induced deflection; Frequency-domain method; Modal combination; Response characteristics; Transmission line;
D O I：
10.13336/j.1003-6520.hve.20170428014
中图分类号：
学科分类号：
摘要：
The equilibrium configuration and stiffness of a multi-span conductor under gravity and mean wind load are taken as the initial conditions for calculation. The fluctuating wind-induced response of the conductor is assumed to be small deformation. Method recommended by the American Society of Civil Engineers (ASCE) is applied to take the effects of aerodynamic damping into account. Frequency-domain calculation method of dynamic wind-induced deflection is proposed. The influences of vibration modes and combination methods on calculation results are deeply analyzed and the results are compared with those obtained by time-domain method. The comparison shows that multiple vibration modes must be considered in the dynamic wind-induced deflection analysis and the cross-terms cannot be neglected. For a 2-span conductor, the complete quadratic combination (CQC) of the first three modes can meet the precision requirement. For a 5-span conductor, the CQC combination of the first nine modes can meet the precision requirement. The calculation shows that the peak fluctuating response of a suspension insulator string can reach more than 10 percent of the mean response, therefore the ignorance of fluctuating wind-induced deflection in current transmission line design is not safe and is one of the main causes of flashovers. © 2017, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：1493 / 1499
页数：6
相关论文
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