摘要
转子侧控制器主导了双馈风电机组的动态,对其进行准确建模至关重要。针对转子侧控制器模型结构复杂、存在相互影响的问题,推导了转子侧控制器的解耦模型。基于该解耦模型,提出通过在输入信号的参考值上施加伪随机信号,根据输入信号和输出信号的自功率谱和互功率谱,辨识转子侧控制器各参数。与灵敏度比较发现,参数辨识精度与灵敏度结果一致。最后指出:即使转子侧控制器内环参数的辨识精度偏低,也基本不影响对双馈风电机组机电暂态过程的分析。
Accurate modeling of the rotor side controller of a doubly-fed induction generator (DFIG)-based wind turbine is of vital importance since it has great effects on the dynamics of DFIG-based wind turbines.The complexity and interactions of its original model make its parameters difficult to estimate.Therefore,a new decoupling model is deduced.It is also proposed that the pseudo random binary signal be superimposed into the reference input,and the parameters are estimated by the transfer function relating an output signal to an input signal.The estimation results agree well with those of sensitivities.It is pointed out that the poor estimation results of parameters in the inner part of the controller are acceptable since they have little effect on DFIG-based wind turbine electro-mechanical dynamics.
出处
《电力系统自动化》
EI
CSCD
北大核心
2015年第20期19-25 108,108,共8页
Automation of Electric Power Systems
基金
国家自然科学基金资助项目(51190102
51137002
51207045)
国家重点基础研究发展计划(973计划)资助项目(2013CB228204)
国家高技术研究发展计划(863计划)资助项目(2011AA05A103)~~
关键词
双馈风电机组
转子侧控制器
解耦模型
频域灵敏度
频域辨识方法
doubly-fed induction generator(DFIG)-based wind turbine
rotor side controller
decoupling model
frequency domain sensitivities
frequency domain estimation method
