湖南省复杂山地风资源数值模拟研究

A Study on the Numerical Simulation of Wind Resources in Complex Mountainous Areas of Hunan Province

湖南省部分高海拔山地区域风资源具有可开发价值,但山地区域地形复杂,风能资源评估往往存在较大的偏差。本文采用中尺度大气模式WRF对湖南省西北部某山地区域进行了数值模拟,并将模拟结果与4座测风塔实测数据进行了比较,分别从年均风速、风速月变化、风向、风切变、温度5个方面考察了模式的模拟能力。研究结果表明,WRF模式对风速均值、风速月变化、风向、温度有较好的模拟效果,风切变模拟效果较差,为数值模拟技术在复杂山地下的风资源评估中的应用提供了参考。

The wind resources in some high-altitude mountain areas in Hunan Province have value of being developed.However the complex terrain often leads to large deviations in the assessment of wind resources.In this paper,we use mesoscale atmospheric model WRF to simulate the wind resources in mountainous area in northwestern Hunan Province and compare the simulation results with the measured data of four wind towers from the following perspectives:average annual wind speed,monthly wind speed variation,wind direction,wind shear and temperature.The research show that WRF model has a good simulation result on the average annual wind speed,monthly wind speed variation,wind direction,and temperature,and the wind shear simulation result is poor.The research provides a reference for the application of mesoscale model WRF in the evaluation of wind power resources in complex mountain areas.