Dominant Device Identification in Multi-VSC Systems by Frequency-Domain Participation Factor

With fast development of power electronic technology, the system is undergoing a great revolution to power-electronic-based one and it poses challenge dominant device identification for stability analysis. As an alternative approach, this paper proposes frequency-domain participation factor method based on open-loop transfer function matrix power imbalance model . It also clarifies relation between different (time-domain, closed-loop, open-loop) analytical methods, showing that they are all certain sensitivities against parameter disturbance elements. Furthermore, by using we study classical IEEE 10-generator-39-bus where synchronous generators completely replaced grid-following or grid-forming converters show can be improved modifying corresponding parameters identified dominating converter.