Analysis of the Effect of Technology to Increase Grid Flexibility of Expanding Renewable Energy Capacity

As the share of Inverter-based renewable generation increases, the physical(or rotation) inertia formerly supplied by synchronous generators declines, reducing the strength and stability of power systems. In response to decreasing inertia in the Korean power system, inertia-providing technologies are being introduced-namely high-inertia synchronous condensers, which supply rotational inertia, and grid forming inverters (GFMs), which provide synthetic (virtual) inertia to secure system stability. This paper explains the technical mechanisms by which Flywheel Synchronous Condensers( and GFM contribute to frequency stability, focusing on inertia provision and active-power support. Using dynamic models of these technologies, perform RMS time-domain simulations(using PSS/E) to analyze their stabilizing impacts on the power system during network faults and subsequent recovery.