Wideband Oscillation Mitigation Using Adaptive New-Type Power System Stabilizers in Converter-Dominated Networks

Traditionally, synchronous generators use Power System Stabilizers (PSSs) to control and damp low-frequency oscillations (LFOs) caused by electromechanical interactions. However, as modern power systems increasingly rely on converter-based technologies, new types of oscillations known as wideband oscillations (WBOs) have become more common. These oscillations arise from the interactions between converters and their control systems, posing new stability challenges. While conventional PSSs have been extensively studied and standardized for synchronous machines, converter-based devices lack equivalent stabilizing solutions. To address this gap, this paper introduces the concept of New-Type Power System Stabilizers (NPSSs)—control mechanisms designed specifically to mitigate WBOs in converter-dominated networks. The study discusses design principles, tuning methods, and implementation techniques for NPSSs and explores their use not only in inverter-based renewable sources (such as Type-3 and Type-4 wind turbines) but also in other converter-driven technologies like FACTS devices, HVDC systems, and battery energy storage inverters. Several practical case studies are presented to demonstrate the effectiveness of NPSSs. Finally, the paper reviews current challenges and research opportunities, offering insights into future development trends for stabilizing modern converter-rich power grids.