Performance Comparison of Typical Frequency Response Strategies for Power Systems With High Penetration of Renewable Energy Sources

Droop control, inertia and PD control are three typical frequency response (FR) strategies of grid-tied inverters interfaced renewable energy sources (RES) to restrain the power system indicators, i.e., deviation ( $\Delta \omega $ ) rate change (RoCoF). Due highly limited inverter capacity, FR performance in systems with high RES penetration should be optimized. To this end, paper first analyzes impact high-penetration injection on stability, derives expressions absence an scheme, presence droop/inertia/PD controls that representative for various virtual synchronous generator-based schemes. Under same constraint available parameter ranges these schemes obtained, their optimal conditions restraining maxima RoCoF identified compared analytically. Comparison conclusions finally proved by provided experiment simulation results.