Examination of Effective VAr With Respect to Dynamic Voltage Stability in Renewable Rich Power Grids

High penetrations of inverter-based renewable resources (IBRs) diminish the resilience that traditional power systems had due to constant research and developments for many years. In particular, dynamic voltage stability becomes one major concerns transmission system operators limited capabilities IBRs (i.e., frequency regulation). A heavily loaded renewable-rich network is susceptible fault-induced delayed recovery (FIDVR) insufficient effective reactive (E-VAr) in grids. Hence, it crucial thoroughly scrutinize each VAr resources' participation E-VAr under various operating conditions. Moreover, essential investigate influence on post-fault performance. The investigation would help determining optimal location sizing grid-connected allow more energy integration. Furthermore, enrich decision-making about adopting additional grid support devices. this paper, a comprehensive assessment framework utilized assess with large-scale photovoltaic power. Plant different realistic Several indices quantifying contribution load bus assists explore transient response trajectories. have better understanding factors affecting E-VAr. proposed has been tested New England (IEEE 39 system) through simulation by DIgSILENT Power Factory.