用实测风速校正的短期风速仿真研究

Short-term Wind Speed Simulation Corrected With Field Measured Wind Speed

风速仿真是风力发电研究的重要手段之一。该文简述了风特征研究概况,建立了基于Kaimal风速功率谱的短期风速仿真模型;将仿真风速与实测风速时间序列做对比,发现仿真结果总体性态良好,但无法反映被仿真场址的特定风速变动规律。因此,进一步提出了用实测风速校正仿真风速的方法,校正后的仿真风速不仅总体性态良好,而且能很好地反映被仿真场址的特定风速变动规律。该文的短期风速仿真方法可以用于短期风速预测、风轮机动态仿真、风力发电控制与电能质量分析等风力发电仿真研究,也可以用于其它风工程、信号分析等领域的仿真研究。

Wind speed simulation is one of the most important means in wind power generation studies. After a brief outline of wind characteristic studies, the paper presents a short-term wind speed simulation model based on Kaimal＇s wind speed power spectrum. The simulated wind speed series were compared to field measured wind speed time series. The results showed good performance for simulation collectivity from the model, while it failed to reflect the specific wind speed fluctuation characteristic related to the simulated site. Hence, the paper proposed a method that employs the field measured wind speed to correct the simulated wind speed. After correcting, the simulated wind speed series not only possessed good performance for simulation collectivity, but reflected excellently the specific site characteristic wind speed fluctuation as well. The proposed method enormously improved the performance of the model. The proposed model and method should be useful in a wide area of studies, such as short-term wind speed forecasting, wind turbine dynamic simulation, wind generation system control, wind power quality analysis, and other wind engineering or signal analysis.