The Wind Resource Assessment And Short-term Forecast Based On NWP-CFD

Wind is everywhere,and not like fossil energy,which will be used up by human.So the wind is a huge potential energy resource,and it is a kind of clean energy.With the development of the wind turbine,selecting the most optimal wind resources site become one of the necessary conditions for the development of wind power,however,the choice of the optimal site needs to understand the macroscopic and microscopic distribution of wind resources,therefore,it is particularly important to research and develop the wind resource assessment technology.At the same time,due to the wind characteristics that are volatility,intermittent and uncontrollable,making the impact of stability and scheduling when the wind power is used into the grid,therefo re,the effective research on the method of wind speed short-term forecasting is also necessary.In this paper,horizontal scales between few metres and many kilometres are employed.The research is to simulate the macroscopic and microscopic distribution of the wind resources and the wind speed forecasting by using Numerical Weather Prediction,Wind Atlas Analysis and Application Program and Computational Fluid Dynamics.In this paper,the Weather Research and Forecasting(WRF)NWP model is further analyzed.This paper uses WRF for the macro wind resource assessment,and studys the simulation results of the mesoscale model forecast.In the research of micro wind resource method,after understanding and comparing the microscopic wind resources assessment met hods including based on CFD and WAs P,this paper uses these micro wind resource assessment methods for the micro wind resource assessment.And through the contrast analysis of the measured values,this comparison helps to study the accuracy of this micro w ind resources assessment method.For the forecasting method of wind speed,this paper considers how to simulate the real wind field by using the coupling mode of NWP and CFD.And by comparing to the method of the mesoscale simulation and the fast prediction method,this paper analyses the accuracy of the wind speed forecasting of this coupling mode when the wind environment is normal and under the environment of the typhoon.This paper achieves a complete research of the numerical simulation methods from macro to micro.This research makes the wind resource assessment methods is no longer limited to the historical data based on the meteorological observatory.These methods help to reduce error that is caused by 10 m measure high of the weather station,and they also help to reduce the impact of the urbanization around the weather stations.At the same time,the coupling model of NWP and CFD is also a downscaling modified and perfected method to simulate the complex terrain,comparing to the only using the meso scale model,which will be simulated more refined.On the other side,this coupling model makes full use of the forecast function of the Numerical Weather Prediction system,which makes the simulation of Computational Fluid Dynamics more real and the simulation can achieve the forecast function.