This paper presents the development of linearized model of asymmetrical six-phase grid-connected induction generator (GCIG) for small-signal stability. The developed linearized model has been used to obtain the eigenvalue to evaluate generator stability with respect to parameter variation of the machine in comparison with its three-phase counterpart. During the analysis, suitability of six-phase induction generator for higher output power has been accessed. Instability tendency during low electrical output power can be avoided through closed loop operation of the machine. Hence, the indirect field-oriented control scheme for asymmetrical six-phase GCIG has been proposed for stable operation with higher reliability. The key analytical results have been demonstrated with its experimental validation.

本文针对小信号稳定性提出了非对称六相并网感应发电机线性化模型的发展。所开发的线性化模型已用于获取特征值，以评估发电机与三相逆变器相比参数变化的稳定性。在分析过程中，已经研究了六相感应发电机对于更高输出功率的适用性。通过机器的闭环运行，可以避免低输出功率期间的不稳定趋势。因此，提出了非对称六相GCIG的间接磁场定向控制方案，以实现稳定运行和更高的可靠性。关键的分析结果已经通过实验验证了。