摘要
在建立双馈风力发电机小信号模型的基础上,通过状态方程的线性化,提出一种基于传递函数的动态频率分析法。以风速变化为输入量、电磁功率变化为输出量,建立了目标传递函数表达式并给出了各参数矩阵的求法。在不同风速扰动频率下,传递函数幅频特性曲线能定量地表征电磁功率波动幅值与风速扰动幅值比。当风速扰动频率接近系统固有振荡频率时,会引起系统谐振。时域仿真波形图与幅频特性曲线相一致,验证了所提分析方法的正确性。
The small-signal model of DFIG（Doubly-Fed Induction Generator） is established and a dynamic frequency analysis method based on transfer function is proposed through the linearization of state equations.With the wind speed variation as input and the electromagnetic power variation as output,the expression of objective transfer function is established and the calculation of parameter matrices is introduced.The amplitude-frequency characteristic curve of transfer function may quantificationally express the ratio of electromagnetic power surge to wind speed surge in different frequencies of wind speed disturbance.The system resonance is induced when the frequency of wind speed disturbance is close to the inherent oscillation frequency of system.The coherence of simulative time-domain waves to amplitude-frequency characteristic curves demonstrates the validity of the proposed analysis method.
出处
《电力自动化设备》
EI
CSCD
北大核心
2012年第11期15-22,共8页
Electric Power Automation Equipment
关键词
风电
双馈感应电机
小信号模型
传递函数
幅频特性
强迫功率振荡
频域分析
wind power
doubly-fed induction generator
small-signal model
transfer functions
amplitudefrequency characteristic
forced power oscillation
frequency domain analysis
