Effect of Power Electronic Converter Parameters on Converter- driven Stability in Transmission Grids with High Converter- interfaced Device Penetration

This paper investigates how power electronic converter parameters influence converter-driven stability in power grids with high-penetration of converter-interfaced devices. To analyse highfrequency interaction mechanisms in multi-converter systems without requiring detailed controller models, the study adopts an impedance-based frequency-domain approach. Converter and grid dynamics are represented in the dq-domain, and stability is assessed using the generalised Nyquist stability criterion applied to the eigenvalues of the system return-ratio matrix.