Analysis, Modelling, and Mitigation of Sub-synchronous Oscillations in a Weak Grid with High Inverter-Based Resources

Many power systems around the world are experiencing a significant increase in transmission and distribution connected inverter-based resources (IBRs). The large uptake of these IBRs has significantly changed power system dynamics. Many system operators have observed, for instance, more frequent occurrence of sub-synchronous oscillations (SSO), particularly in the weak parts of the network with high concentration of IBRs. This paper investigates SSO incidents observed in a remote area of the