一种增强弱电网下跟网型逆变器大信号稳定性的参考坐标系重匹配方法

The classical phase-locked loop (PLL)-based vector current control scheme has been widely used in grid-following (GFL) inverter systems. However, GFL inverters with this classical control scheme tend to be unstable under severe grid fault conditions, especially in weak grid cases. This article reveals that the PLL angle's dynamic is the main reason for instability. Specifically, the control dq fra...