Review on the Stability of Digitally Controlled Grid-Connected Converters under Varying Impedance Conditions (Weak Grids)

다국어 초록 (Multilingual Abstract)

This review article explores the stability of digitally controlled grid-connected converters operating under varying grid or interconnection impedance. Due to global decarbonization policies and drives, renewable energy sources are becoming more integrated into the grid. Rising integration has resulted in a more complex and interconnected power system. This has caused the stability of grid-connected converters to be a critical issue, particularly since the continuous decommissioning of traditional synchronous generators (SGs) weakens the grid infrastructure. Interconnecting converters employ mostly digital control because it offers enhanced flexibility and precision in managing power flow. However, their harmonic stability under challenging grid conditions warrants careful examination. This article evaluates the stability challenges encountered by digitally controlled gridconnected converters in varying interconnection impedance environments.