| 引用本文: | 陈 波,吴政球.双馈感应风力发电机强迫功率振荡的频域分析法[J].电力自动化设备,2012,32(11): |
| CHEN Bo,WU Zhengqiu.Frequency domain analysis of forced power oscillation induced by doubly-fed induction generator[J].Electric Power Automation Equipment,2012,32(11): |
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| 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。 |
| 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 |
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| Frequency domain analysis of forced power oscillation induced by doubly-fed induction generator |
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CHEN Bo, WU Zhengqiu
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College of Electrical and Information Engineering，Hunan University，Changsha 410082，China
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| Abstract: |
| 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. |
| Key words: wind power doubly-fed induction generator small-signal model transfer functions amplitude-frequency characteristic forced power oscillation frequency domain analysis |
