电网故障下多并联锁相环同步逆变器的暂态稳定性分析与协调相位控制方法

To utilize renewable energies, such as solar energy, distributed power generation systems are widely used, where multiple string inverters are parallelly connected to the grid and often adopt the phase-locked loop (PLL) for grid synchronization. However, under severe voltage sags caused by grid faults, the PLL-synchronized inverter system is susceptible to transient instability, which manifests as...