<p>Integration of inverter-based resources (IBRs) in power system is the necessity of present power system. With IBR rapidly integrating into the grid in last few decades has raised challenges in the power system to maintain stability. There is necessity to investigate dynamic stability due to the integration of IBR to mitigate the negative impacts on the system. Motivated by the challenges of integrating IBR in power system, a comprehensive investigation on several aspects of stability has been carried out. Responses of integrating IBR on various benchmarks have been analysed in time domain with phasor measurement unit (PMU). The results of the investigation indicate indirect effect on stability by reduction in system inertia and direct effect on protection settings. To investigate the phenomenon which are of interest in few microseconds to milliseconds, EMT simulations have to be performed. Therefore, simulation studies have been carried out in real time step of 50µseconds using EMTP–RV and OPAL RT simulator with HYPERSIM environment on benchmark systems of nine-bus system, single-machine system and Kundur’s two-area system with photovoltaic generator (PV).</p>