论文标题
关于网格遵循和格式形成VSC之间瞬时稳定性的新观点
New perspectives on transient stability between grid-following and grid-forming VSCs
论文作者
论文摘要
电压源转换器中的网格跟踪和网格形成对照被认为是不同的操作模式，并且分别研究了它们的同步机制。在本文中，建立了网格遵循和格式形成控制转换器之间的内在关系：1）PLL的比例增益与阻尼相反； 2）PLL的积分增益类似于整体下垂； 3）PLL没有实用的惯性，但其作用类似于零惯性案例的网格控制。此外，提出了一种结合阻尼和惯性的一般稳定增强方法，并获得了修改的能量功能以估计系统吸引区域。最后，通过直观结论的模拟测试来证实这些发现。
The grid-following and grid-forming controls in voltage-source converters are considered as different operation modes and the synchronization mechanism of them are studied separately. In this article, the intrinsic relationships between gridfollowing and grid-forming controlled converters are established as follows: 1) the proportional gain of PLL is in inverse proportion to damping; 2) the integral gain of PLL is similar to integral droop; 3) PLL has no practical inertia but acts like grid-forming control in zero inertia cases. Further, a general stability-enhanced method combining damping and inertia is proposed, and the modified energy function is obtained to estimate the region of attraction for the system. Finally, these findings are corroborated by simulation tests with an intuitive conclusion.
