SIMULATION OF NON-STATIONARY WIND SPEED STOCHASTIC WAVE BASED ON TIME-FREQUENCY INTERPOLATION

Wei Haitao; Cao Liyuan; Huang Xinyi; Li Chunxiang

doi:10.19912/j.0254-0096.tynxb.2025-0317

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (7) : 79-89. DOI: 10.19912/j.0254-0096.tynxb.2025-0317

SIMULATION OF NON-STATIONARY WIND SPEED STOCHASTIC WAVE BASED ON TIME-FREQUENCY INTERPOLATION

Wei Haitao, Cao Liyuan, Huang Xinyi, Li Chunxiang

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Abstract

To address the issue of low computational efficiency in simulating non-stationary wind fields with time-varying coherence functions for transmission tower-line systems, an efficient time-frequency interpolation-based stochastic wave spectral representation method （TFI-SWSRM） is proposed. First, the wavenumber-frequency joint power spectrum （WFJPS） that incorporates the time-varying coherence function is constructed at non-uniformly distributed time-frequency interpolation nodes. Second, the proper orthogonal decomposition （POD） method is adopted to decompose the WFJPS into independent components. Subsequently, non-stationary wind speed time series are generated by integrating the time-frequency interpolation （TFI） technique with the fast Fourier transform （FFT） algorithm. Finally, the effectiveness of the proposed TFI-SWSRM is verified by simulating both non-stationary homogeneous and non-stationary non-homogeneous wind fields with time-varying coherence functions in transmission tower-line systems. A comparative analysis of computational cost between the proposed TFI-SWSRM and conventional simulation methods demonstrates that the proposed approach achieves substantially higher computational simulation efficiency.

Key words

wind farm / wind speed / numerical simulation / wavenumber-frequency joint power spectrum / time-frequency interpolation / proper orthogonal decomposition

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Wei Haitao, Cao Liyuan, Huang Xinyi, Li Chunxiang. SIMULATION OF NON-STATIONARY WIND SPEED STOCHASTIC WAVE BASED ON TIME-FREQUENCY INTERPOLATION[J]. Acta Energiae Solaris Sinica. 2026, 47(7): 79-89 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0317

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