Numerical Simulation Of Henan Wind Resources And Application Analysis Of Micro-site Selection Based On WRF

Against the background of increasingly saturated wind farm development in regions with sufficient wind resources,the construction of wind farms in plain areas has gradually attracted attention.Accelerating the development and utilization of wind resources in low wind speed areas in plain areas is of great significance for achieving China's 2020renewable energy goals.Henan Province,as the first region in China to develop plain low wind speed wind power,has more research value.This paper was based on a plain wind farm in Xiangfu District,Zhengzhou City,Henan Province.First,a mesoscale meteorological model WRF was used to simulate the 2016wind field in this area.Different parameterization schemes of boundary layer were selected to conduct numerical simulation and sensitivity test for one year,and the wind measurement data of Xiangyang District 1017#wind tower was verified and analyzed.Finally,the best combination of schemes for wind resource assessment of the region where the wind farm is located in xiangfu district was obtained.Then the micro-scale wind resource assessment model WAs P was used to conduct micro-site selection.The 2016 WRF Xiangfu District simulation results showed that the simulation results of the WRF model in the wind speed time series,wind direction time series,the daily average wind speed and wind shear were in high anastomosis with the actual data.January and July were selected as the representative months of winter and summer,and the four boundary layer schemes were used to simulate the wind speed of the near-ground layer(10m)and the height of the fan hub(85m).Correlation analysis with actual observations showed that the YSU-MM5 boundary layer scheme was the best among all sensitivity tests,and the QNSE-QNSE scheme was the worst.The simulation results of the WRF optimal scheme were extracted and analyzed,the data were verified by the wind energy assessment model WAs P.It was obtained that the average wind speed was 5.21m/s,the average wind energy density was 157W/m~2,the error between the simulation value of the average wind speed and the Weibull simulation value was 5.77%,the error between the simulation value of the average power density and the Weibull fitting value was 1.10%.Therefore,it was appropriate to use weibull distribution to evaluate the distribution of wind energy in the Xiangfu zone.Took the wind farm in Xiangfu District as an example for micro-site selection,selected 90m resolution SRTM elevation data for WAs P mode electronic topographic map production,applied the roughness information provided by Google Earth to draw the obstacle group and roughness file near 1017#wind tower.used Jackson-Hunt theory and Jensen wake model to calculate the wind field distribution and wake loss,combined the power curve of the actual wind turbine in Xiangfu District wind farm and the wind resource distribution map which calculated by the resource grid,we formulate the final 25 wind turbines Layout plan.