Identification, location, and mitigation of forced oscillations

In recent years, the number of forced oscillation events has climbed significantly because of increasing uncertainties in grid operations with the growing penetration of inverter-interfaced resources. Unlike natural oscillations, forced oscillations are not immediately explainable by intrinsic properties of a conventional power system model. Instead, they are responses of the system to an external, cyclic input and can last for a relatively long time, minutes to hours, with sustained amplitude as long as the source is persistent. Forced oscillations are among the main threats to grid operators to maintain power system stability and dynamic performance. This panel will highlight findings by the “Oscillation Source Location” task force on mechanism and identification of forced oscillations, introduce methods and tools for locating an oscillation source and discuss mitigation of forced oscillations. The panel will also provide a forum for the academia and industry to brainstorm next steps against forced oscillations.