The increasing integration of renewable energy sources, such as wind and solar power, has brought significant challenges to power system stability, particularly in terms of angle stability. This paper investigates the influence of grid forming controls, specifically the virtual synchronous generator (VSG), on oscillation stability in power systems with high penetration of renewable energy. The study employs modal analysis and time-domain simulations to evaluate the interactions between VSG controllers and synchronous generator controllers. Results reveal that VSGs are participating in the inter-area oscillations and could improve overall system stability, even in scenarios where conventional stabilizers are deactivated. The findings underscore the importance of VSGs in ensuring the reliability of modern power systems under the global energy transition.
Cai et al. (Sun,) studied this question.