Dynamic Cascading Simulations of Hybrid AC/DC Power Systems in PSS/E

S. Rezaeian-Marjani, L. Sigrist, A. García-Cerrada

Energies Vol. 19, nº. 7, pp. 1611

Summary:

Power system blackouts remain a major concern for modern electricity networks, as they often result from cascading failures that lead to substantial load shedding and widespread service disruptions. This paper presents a dynamic resilience assessment of hybrid AC/DC power systems and investigates the effectiveness of voltage-source-converter-based high-voltage direct current (VSC-HVDC) technology in enhancing system resilience under outage contingencies. The study contributes by integrating protection devices and their settings into the analysis and by providing a quantitative evaluation of the system response to N-2 and N-3 contingencies using PSS^®E simulations. The demand not served index is used as a measure of resilience, and its cumulative distribution functions are computed to compare the performance of AC and DC interconnections. The results underscore the importance of VSC-HVDC links in mitigating cascading failures, highlighting their potential as a resilience-enhancing component in modern power grids.

Spanish layman's summary:

Este artículo muestra que los enlaces VSC-HVDC pueden mejorar la resiliencia de los sistemas eléctricos híbridos AC/DC. Ayudan a limitar los fallos en cascada ante múltiples contingencias, reduciendo el riesgo de grandes apagones y de demanda no suministrada.

English layman's summary:

This paper shows that VSC-HVDC links can improve the resilience of hybrid AC/DC power systems. They help limit cascading failures during multiple outages, reducing the risk of large blackouts and unserved demand.

Keywords: resilience; dynamic simulation; contingency analysis; VSC-HVDC

JCR-JIF Impact Factor and WoS quartile: 3,900 - Q3 (2025)

DOI reference: https://doi.org/10.3390/en19071611

Published on paper: April 2026.

Published on-line: March 2026.

Citation:
S. Rezaeian-Marjani, L. Sigrist, A. García-Cerrada, "Dynamic Cascading Simulations of Hybrid AC/DC Power Systems in PSS/E", Energies, Vol. 19, nº. 7, pp. 1611, April 2026. [Online: March 2026] doi: 10.3390/en19071611