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Numerical Analysis on Wind-Induced Vibration of Long Span Power Transmission Towers

A method for analyzing wind-induced vibrations of 1000kv Hanjiang ultrahigh voltage long span power transmission towers coupled with power lines is discussed in this paper. This paper also discusses the influence on response characteristics of differences in transmission support systems and differences between peak factors, computed from a time-series and from power spectrum density. Through the analysis of the data of dynamic characteristic and wind-induced response of the tower-transmission line system, the results of analysis show that differences in the way power transmission towers supported power lines have an influence on response characteristics, and peak factors computed from a time-series response are greater than those computed from power spectrum density.