Combing Meteorological Stations And Satellite Data To Evaluate The Wind Power Resource Of Jiangsu

In the 21st century, the continuously rising energy demand and the guarantee of energy supply security are the main challenges we are facing all over the world. China as the second economic entity, its energy demand is especially increasing with high speed. As the alternative sources of energy, clean and renewable energy has great potential for daily usage, especially. Unlike the conventional energy sources, wind power is a fastest growing renewable energy source, which is fuel-free, less carbon dioxide emission, as well as proven commercial prospect, which is sufficient to cope with the ever-growing electricity demand. Therefore, a scientific, objective and accurate assessment of the wind energy spatio-temporal distribution and its development potential plays an indispensable role in the early regional energy planning for Jiangsu province.Consequently, based on the meteorological in-situ data from 2006 to 2014, satellite data (ASCT QuikSCAT Windsat) from 1999 to 2015, socio-economic factor and both theoretical and practical measures of wind turbine performance, we analyzed and mapped the spatio-temporal characteristics of wind energy. Moreover, the available wind energy resources were assessed and the international mature wind energy resource assessment indexes were calculated. The study attempted to establish a scientific, simple and efficient methodology to assess the land and offshore wind resources by taking advantage of GIS and satellite technology, which can provide scientific reasons for future wind resource development in Jiangsu.The main contents of this study include:(1) The verification of satellite wind data. The satellite data such as QuikSCAT, ASCAT, and Windsat were testified by the in-situ meteorological data form ground stations, with which error characteristic was also analyzed.(2) The assessment of wind energy resource in land. Based on the hourly meteorological data from 2006 to 2014 in Jiangsu Province, local wind energy resource in land was assessed. Then, the 80 m annual average wind speed with spatial resolution of 1km has been calculated by using ordinary Krriging interpolation, combined with the local nature economic factors such as DEM and land use data was used to calculate the wind power density and evaluate the actual potential of wind energy development by taking into consideration wind turbine performance.(3) The evaluation of offshore wind power resource. The in-situ meteorological data from ground stations were used to validate and adjust the various satellite data. In addition, the measurement data from marine stations as well as the water depth data was applied to spatio-temporal distribution characteristics of offshore wind resource in Jiangsu province, which could reveal the suitable regions for wind energy development.Results show that:(1) The satellites data (QuikSCAT、ASCAT、Windsat) has certain bias, and the wind speed RMSE is about 3 m/s, the mean error is 1 m/s, meaning that the satellites data can be used for near-coast estimation for wind energy in Jiangsu.(2) The land wind estimation results show that Jiangsu onshore wind energy resource is abundant. The onshore wind speed has significant negative correlation relationship with surface roughness and latitude, showing that the spatial distribution of wind power in lower latitude is richer than higher latitude. The closer distance from the coast, the richer wind energy resource is. The richest wind power density is in spring and the autumn/winter are relatively lower. The result shows that there are areas more than 13573.24 km2 can be used to develop wind farms in Jiangsu province, which are mainly located in the eastern coastal regions. It can be installed with 97866 Vestas V80 wind turbines, and the total installed capacity of wind in Jiangsu province can reach to 2.06×105 GWh.(3) Results show that Jiangsu offshore is a typical monsoon climate, the wind direction is very steady and the prevailing wind direction is southeaster. The variation of the wind power density is obviously regular, and the power offshore wind power density is highest in the winter, which has opposite situations in other three seasons. In the coastal area, we found an average resource of 2×106 GWh electric production for a year, which is approximately equal to the quadruple electric demand for the entire Jiangsu province. The installed capacity of wind can reach to 9×105 GWh in shallow depths up to about 25 meters region, and about 1.8×106 GWh in region where water depth is less than 50 m.