This paper proposes a self-synchronizing synchronverter controller design that leverages the addition of a virtual resistance (along with a suitable coordinate transformation) to compute feedback signals during self synchronization prior to grid connection. With respect to analysis, we exploit separation-of-time-scales arguments and develop appropriate reduced-order models, which are well-suited for studying phase-angle and voltage-magnitude self-synchronization dynamics independently. Our work provides analytical justification for the effects of pertinent controller parameters and system initial conditions on self-synchronization dynamics observed empirically in time-domain simulations. As such, it offers practical guidance on favourable parameter-value settings to achieve fast self synchronization, and it yields accurate estimates for self-synchronization times with well-tuned parameters. Through numerical simulations and experiments, we illustrate the efficacy of the proposed controller design and verify the validity of subsequent analyses.

中文翻译：

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分析同步逆变器自同步动力学以促进参数调整

本文提出了一种自同步同步逆变器控制器设计，该设计利用添加虚拟电阻（以及合适的坐标变换）来计算并网之前自同步期间的反馈信号。在分析方面，我们利用时间尺度分离参数并开发了适当的降阶模型，这些模型非常适合独立研究相角和电压幅度自同步动力学。我们的工作为相关控制器参数和系统初始条件对时域模拟中凭经验观察到的自同步动力学的影响提供了分析依据。因此，它为有利的参数值设置提供了实用的指导，以实现快速自同步，并且它可以通过调整良好的参数对自同步时间产生准确的估计。通过数值模拟和实验，我们说明了所提出的控制器设计的有效性，并验证了后续分析的有效性。