Stability analysis of Three-phase Grid-Connected inverter under the weak grids with asymmetrical grid impedance by LTP theory in time domain

•Title:Stability Analysis ofThree-phase Grid-ConnectedInverterUnderthe Asymmetrical Grid ImpedancebyLTPTheoryinTime Domain.•Complete HSS model of GCI considering the time-varying dynamics of PLL under asymmetrical network.•Comprehensive exploration about the influence of the asymmetrical grid impedance on system stability.•Determination of stability boundaries of the system's key parameters under different grid impedance unbalanceindex.•Narrowed stability region of the system's critical parameters with increasing of impedance unbalanceindex.