Fault Modeling and Analysis of Grid-Connected Inverters With Decoupled Sequence Control

With an increasing number of inverter-interfaced generators (IIGs), the power system is undergoing massive shifts toward electronic dominated system. Such paradigm change poses significant challenges to existing fault analysis theory and protection system, as a result disparate short-circuit response. Given this, needs be further investigated expanded address issues arising from new grid paradigm. Under this context, article proposes analytic model for IIGs with decoupled sequence control (DSC) based on Laplace transform. proposed model, current expression can obtained characteristic analyzed. Compared studies, distinguishes itself by three key merits. First, takes into account delay feature controller, which enables transient analysis. Second, covers impact controller parameters low voltage ride through strategy in detail missing most literature. Third, provides theoretical foundation DSC analysis, makes it more applicable setup reality. In end, correctness feasibility validated simulation experimental result.