风能特性对风电场电能输出预测研究  

The Predictive Study of Wind Energy Characteristics for the Power Energy Production of the Wind Farm

作　　者：杨培宏[1] 胡庆林[1] 胡忠林[2] 付盼[1] 

机构地区：[1]内蒙古科技大学,内蒙古包头014010 [2]东北林业大学,黑龙江哈尔滨150000

出　　处：《计算机仿真》2016年第12期122-127,共6页Computer Simulation

基　　金：内蒙古自治区高等学校科学研究项目(NJZY14165)

摘　　要：风电场输出特性取决于输入风能的大小,并与能量的输出紧密相关。大规模风电场可能由数百台风机组成,占地面积相当巨大,这时风场内各风机所处的状态也会有所不同,受到风特性、风速传播过程中的时滞以及尾流效应等的影响,以双馈异步发电机风场出发,在matlab/simmlink仿真平台上,建立了20台单机容量为750kw所组成的风电场并网模型。对不同风能特性作用下风电场的整体输出特性进行了比较分析。得出的结果表明,不同风速分量作用在风电机组上,幅值相同的渐变风、随机风、阵风分别作用于风电场,对有功功率输出的影响分别为最大、最小、振荡最剧烈。尾流效应降低了下游风机的有功输出能力进而降低了风电场整体输出有功功率的能力。风速的时滞会使输出功率平滑。在对风电场并入大电网的检测中,应将风能特性的影响考虑在内,以提高电能预测的准确性。With the grid capacity of wind farm expanding constantly, the scheduling control and the stable operation which is incorporated into the grid need accurate information of input power. Considering wake effect of the units, many factors may change the intensity of the wake effect, such as the position, distance, topography, wind direction, wind speed of the units and so on. Taking the above factors into consideration, the model of the factors which influences wake effect in the units was established by using the software MATLAB. Simulation and analysis of the wind field distribution and the function of output power were carried out with different factors. Also, the model of the wake effect was established under complex conditions. A concept of the influence coefficient of wake effect was proposed, and a quantitative analysis of the effect was conducted based on wake effects on wind farm output. The simulation results can provide some reference for the selection and construction of wind farm and prediction of regional wind energy distribution.

关 键 词：风特性 尾流效应 双馈发电机 时滞 

分 类 号：TM743[电气工程—电力系统及自动化]