Numerical Simulation and Verification of Unsteady Typhoon Wind Fields on Overhead Transmission Lines
In order to simulate the non-stationary typhoon wind field of overhead transmission lines,a simulation method for the non-stationary typhoon wind field of overhead transmission lines was proposed,taking into account the turbulence intensity and gust factor characteristics and their effects of the non-stationary pulsating wind field.Firstly,the Spline interpolation method was used to generate time-varying average wind speed,and the harmonic synthesis method of updating time-varying average wind speed was used to simulate fluctuating wind speed.Then,based on the three-dimensional wind spectrum power density function,the time-varying power spectrum of the typhoon wind field was constructed,taking into account the spatial correlation of the wind field,and the modulation evolution power spectrum was obtained,which is compared with the simulated typhoon power spectrum.Finally,taking the coastal 500 kV overhead transmission line as an example,the rationality of the typhoon simulation method was verified.The research results indicate that as the basic time interval increases,the proportion of non-stationary factors in typhoons increases.The non-stationary typhoon simulation method proposed can achieve the simulation of non-stationary typhoon wind fields on transmission lines.
万方数据
维普
