一种基于锁相环的非侵入式电网阻抗估计方法

For grid-following inverters, an accurate grid impedance estimation (GIE) enables many beneficial applications. Conventional active GIE methods, such as the PQ variation method, intentionally introduce power disturbances around the system's steady-state operating point. However, it might bring undesired reactive power into the grid and its accuracy can be influenced by phase-lock loop (PLL) phase ...