An Extended Admittance Modeling Method with Synchronization Node for Stability Assessment of Converters-Interlinked System

Haoxiang Zong, Chen Zhang, Marta Molinas

correctmedium confidence

Category: Not specified
Journal tier: Strong Field
Processed: Sep 28, 2025, 12:56 AM
arXiv Links: Abstract ↗PDF ↗

Audit review

The paper and the candidate solution derive the same loop-gain formulation L(s)=Znet(s)Ycon(s), use the same closed-loop condition det[I+L(s)]=0, adopt the same four-port EIM/EIN construction with the sync forward branch realized as a virtual network branch with sign modification Ysync_fo -> −Ysync_fo, and embed the sync feedback path in Ycon. Both also use a per-unit (dimensionless) transformation and the same eigenvalue/participation-factor sensitivities. The candidate adds standard network-reduction details (Kron reduction) and states an equivalence of det[I+L] before/after per-unit scaling; while this is essentially the intent in the paper, it is safer to phrase invariance via det(Yeq+Ycon)=0. Overall, the proofs are substantially the same and correct.

Referee report (LaTeX)

\textbf{Recommendation:} minor revisions

\textbf{Journal Tier:} strong field

\textbf{Justification:}

A solid extension of impedance-based FMA that cleanly integrates synchronization dynamics via a four-port EIM and EIN. The loop-gain, stability criterion, and PF/sensitivity framework are sound and well validated. Clarifying the per-unit invariance with respect to the characteristic equation will further tighten correctness and improve readability.