Research enhancing stability of Uzbekistan’s renewable energy power system through virtual PSS control

With the advancement of global energy transition, Uzbekistan plans to increase the proportion of renewable energy generation to over 25% by 2030. Against this backdrop, the rapid growth of the new energy power system poses new challenges to the stability of the country’s power system, particularly in terms of inertia and damping characteristics. Therefore, this study focuses on the research of stability issues in the integration of new energy sources into the grid. Based on a third-order model, a virtual excitation power system stabilizer (PSS) component is designed using the principle of active support control, addressing the power oscillation issue caused by the traditional PSS control. Additionally, to tackle the inherent problem of power oscillations caused by negative damping resulting in sustained angular oscillations, this paper designs a virtual angular PSS component based on the flexibility of power electronic devices. By directly controlling the power angle, the power oscillations caused by new energy units are further suppressed, enhancing the dynamic stability of the new energy power system.