一种基于电感电流前馈与耦合增强控制的构网型逆变器稳定性提升方法

ABSTRACT Although the stable operation of grid‐forming inverters (GFMIs) in weak grids is well‐documented, undesirable oscillations tend to arise when cascaded multi‐loop control architectures are employed, particularly under strong‐grid conditions. In this work, a sequence impedance model of the GFMI is developed, through which the closed‐loop feedback control of the inductor current is identified as the main contributor to oscillations. Accordingly, a stabilisation strategy for GFMIs, combining inductor current feedforward and coupling‐enhancing techniques, is proposed for strong‐grid applications. Finally, a 2 kW experimental prototype was constructed to validate the stability enhancement method, thereby providing practical verification.