Numerical results showed that the proposed boundary could simulate the influence of far field and did not have the problem of low-frequency instability.
数值分析结果显示，该边界可较好地模拟远场介质的作用以及土体的辐射阻尼，具有良好的低频稳定性。
The low-frequency instability in variable speed constant frequency doubly fed induction generator(DFIG) widely used in wind power generation is investigated.
研究了广泛应用于风力发电的变速恒频双馈感应电机系统中的低频不稳定现象。
Low and intermediate frequency instability models are taken up first.
首先处理低频和中频不稳定性的模型。
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