Simulation method and device of complex mountain land surface large wind

Abstract

The invention discloses a simulation method and device of complex mountain land surface large wind, and a method of the combination of WRF model simulation and large eddy model simulation is used. Ground surface characteristic parameters of a complex land surface with temporal evolution are introduced into a middle size weather forecasting system WRF, further assimilation and correction are carried out with the combination of observation data, then the scale down processing is carried out, and a wind field of a high-precision spatial-temporal resolution is outputted. A large eddy simulation method is used, complex land surface data is inputted into a large eddy mode, the simulation is carried out with the high resolution wind field as an initial field, and a conceptual model is given. Output results of WRF model simulation and large eddy model simulation are compared, and a wind field fine prediction system is established. The invention provides the method and the device, the data acquisition is more reliable, the precise forecast of complex mountain landform surface layer wind can be realized. The method and the device provided by the invention are suitable for the simulation and statistical analysis of the complex surface middle and large scale land layer and the high layer wind under the influence of terrains.

Description

Technical field [0001] The invention relates to the technical field of wind simulation and statistical analysis, and in particular to a method and device for simulating strong wind on the underlying surface of a complex mountain. Background technique [0002] Wind damage is one of the main factors that cause failures in the operation of transmission lines, and wind protection has always been paid attention to by the power grid operation department. The primary prerequisite for the study of power grid wind damage is the accurate forecast of near-surface wind. However, the near-surface wind speed is affected by factors such as topography, surface conditions, vegetation coverage, turbulence in the near-surface atmosphere, and the entrainment process between the near-surface atmosphere and the mixed layer, residual layer, and stable boundary layer. Its wind speed has strong fluctuations. The time scale can be on the order of minutes or even seconds, and drastic changes in wind speed...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a method and device for simulating high winds on complex mountain subterranean surfaces, to solve the problem that the existing simulation methods cannot realize real-time simulation, which makes the simulation results inaccurate, and thus leads to inaccurate forecast results of near-surface winds

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