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发明公开
CN106712000A 永磁直驱风机的接入电力系统的振荡风险评估方法及装置 有权

永磁直驱风机的接入电力系统的振荡风险评估方法及装置
摘要：
本发明涉及一种永磁直驱风机的接入电力系统的振荡风险评估方法及装置，其中，方法包括：获取永磁直驱风机的接入电力系统的线路电阻RLine和线路电感LLine；在永磁直驱风机的接入电力系统的并网点，对所述永磁直驱风机进行扫频，得到永磁直驱风机在频率fmin至频率fmax之间的阻抗特性；利用线路电阻RLine、线路电感LLine和永磁直驱风机的阻抗特性，求得频率fmin至频率fmax之间线路电抗和永磁直驱风机电抗之和为0时所对应的频率fzi；其中，频率fzi组成频率序列fZero＝{fz1,fz2,...,fzM}；利用频率序列fZero＝{fz1,fz2,...,fzM}对永磁直驱风机的接入电力系统的振荡风险进行评估。
摘要（英）：

The invention relates to an oscillation risk assessment method and device for an access power system of a permanent magnetic direct drive motor, and the method comprises the steps: obtaining line resistance RLine and line inductance LLine of the access power system of the permanent magnetic direct drive motor; carrying out the frequency sweeping of the permanent magnetic direct drive motor at a grid connected point of the access power system of the permanent magnetic direct drive motor, and obtaining the impedance characteristics of the permanent magnetic direct drive motor between the frequency fmin and the frequency fmax; solving the frequency fzi corresponding to a condition that the sum of the line impedance between the frequency fmin and the frequency fmax and the reactance of the permanent magnetic direct drive motor through employing the line resistance RLine, the line inductance LLine and the impedance characteristics of the permanent magnetic direct drive motor, wherein the frequency fzi forms a frequency sequence fZero={fz1, fz2, ...,fzM}; and carrying out the assessment of the oscillation risk of the access power system of the permanent magnetic direct drive motor.

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