Luis A. Garcia-Reyes, Anup Joshi
This paper presents a frequency-domain, impedance-based sensitivity methodology for stability assessment and enhancement of line-commutated converter HVDC (LCC-HVDC) links operating under weak-grid conditions. The methodology integrates frequency-domain identification tailored for black-box systems, the Generalized Nyquist Criterion (GNC) for multivariable stability assessment, and modal impedance decomposition with participation-factor analysis to locate and interpret interaction mechanisms. The approach is validated against a detailed linearized state-space model and nonlinear EMT simulations of an LCC-HVDC benchmark. A sensitivity study varying the grid short-circuit ratio (SCR) reveals a stability limit for the standalone LCC-HVDC link and demonstrates that the integration of a grid-forming voltage source converter (GFM-VSC) substantially increases the stability margin.
@article{9f7067ab-3bde-44aa-aef2-9e07f065dccf,
title={2026 GarciaReyes LCC HVDC Weak Grid Stability},
author={Luis A. Garcia-Reyes and Anup Joshi},
year={2026},
language={en}
}TY - JOUR TI - 2026 GarciaReyes LCC HVDC Weak Grid Stability AU - Luis A. Garcia-Reyes AU - Anup Joshi PY - 2026 LA - en ER -
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