Synchronization Instability of Inverter-Based Generation During Asymmetrical Grid Faults

The transient stability of traditional power systems is concerned with the ability generators to stay synchronized positive-sequence voltage network, whether for symmetrical or asymmetrical faults. In contrast, both positive- and negative-sequence synchronizations should be concern inverter-based generation (IBG) under This because latest grid codes stipulate that IBG inject dual-sequence current when riding through Currently, much less known about synchronization during significantly differs from alone coupled involved. paper aims fill this gap. Considering sequence coupling faults, model developed. Based on model, conditions steady-state equilibrium points follow are identified. throw light possible types instability, including dominated instability one. For different dominant factors analyzed quantitatively, which reflected by limit injection amplitude. Exceeding will lead loss synchronizations. analysis verified simulations hardware-in-the-loop experiments.