A Dominant Oscillatory Nodes Localization Method for Multi-Converter-Fed Power Systems

The paper presents a method for localizing dominant oscillatory nodes and a coordinated impedance control scheme for multi-converter-fed (MCF) power systems, these approaches aim to simplify the stability analysis for power systems with complex transmission networks. Firstly, an impedance-based stability analysis method for MCF power systems is defined, utilizing active nodes and passive network partition. Subsequently, a stability margin sensitivity (SMS) index based on the impedance participation factor (PF) is derived, which simplifies the localization of the oscillation source without the necessity of calculating the oscillation modes or eigenvalues. Finally, the effectiveness and accuracy of the proposed method are demonstrated by specific case studies and simulation results.