Review of Modeling, Analysis and Suppression Strategies for Wide-band Oscillations in Microgrids

Microgrids have the ability to self balance, self regulate, and self control, playing a crucial role in new power systems. However, due to the control components with different bandwidths, dynamic interactions between various power electronic converter interface devices and passive components in power networks occur at multiple time scales. This interaction may lead to broadband oscillations in the microgrid, posing a risk to its safe and stable operation and distribution network. This article comprehensively reviews, summarizes, and predicts the research on broadband oscillation problems and their mitigation in microgrids. Firstly, a classification method is proposed based on the characteristics and causes of broadband oscillation in microgrids. Subsequently, considering different types of suppression control methods, the research status of broadband oscillation analysis and suppression in microgrids at home and abroad was summarized. Finally, prospects were made for future research directions and ideas in related fields.