摘要
针对大型双馈机组风电场,提出一种新的动态等效建模方法。该方法以双馈风电机组桨距角控制动作情况作为机群分类原则,通过提取反映桨距角控制动作的特征向量,并将其作为支持向量机的输入,从而进行双馈风电机组的动态分群以及同群机组的合并、等效。在此基础上给出了等效模型的参数计算方法,得出以3台风电机组表征的风电场等效模型。与传统等效建模方法的对比结果表明,所提出的三机表征模型能够更准确地反映双馈机组风电场并网点的动态特性。
For a large-scale wind farm with wind turbine driven doubly fed induction generator （DFIG）, a new equivalent modeling method is proposed. This method uses the DFIG pitch control action as the grouping rule of wind turbines. By extracting eigenvectors that reflect pitch control action, it is used as input of support vector machine （SVM）. The wind turbines are dynamically grouped, and the same group wind turbines are aggregated. The calculating methods of equivalent model parameters are provided. Thus a wind farm model represented by three equivalent wind turbines is obtained. Compared with the traditional equivalent modeling methods, the results show that the proposed three-machine equivalent model more accurately describes the dynamic characteristics of a wind farm at the grid connection point.
出处
《电力系统自动化》
EI
CSCD
北大核心
2010年第17期72-77,共6页
Automation of Electric Power Systems
基金
国家自然科学基金资助项目(50807015)
高等学校博士学科点专项科研基金资助项目(20090036110006)~~
关键词
双馈风电机组
风电场
支持向量机
等效模型
wind turbine driven doubly fed induction generator
wind farm
SVM
equivalence model
