Robust Stability Analysis of DC Microgrids

Authors

Keywords:

DC microgrids, robust stability, droop control, μ-analysis, modeling, Buck–R2P2, constant power load

Abstract

Direct current (DC) microgrids integrate renewable energy sources, energy storage systems, and electronic loads in order to improve efficiency and flexibility in energy management. However, their stability can be compromised by dynamic interactions among subsystems under different operating conditions, particularly in the presence of constant power loads (CPLs). This paper proposes a robust stability analysis based on the $\mu$-analysis framework. The main contribution is a systematic and reproducible $\mu$-analysis procedure that quantifies robust stability margins under simultaneous load uncertainties applied to DC microgrids. To demonstrate its applicability, a microgrid architecture composed of a high-order Quadratic Buck converter with reduced redundant power processing interacting with a conventional Boost converter is analyzed. Validation is carried out using switched models implemented in the PowerSim simulator under time-varying load conditions. In addition, Monte Carlo simulations are performed by sampling the load parameters to evaluate robustness under simultaneous load uncertainties. The results confirm the effectiveness of the proposed methodology for validating time-domain behavior and assessing robust stability in DC microgrids with CPLs.

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Author Biographies

Saúl Rolando Méndez Elizondo, Universidad Autonoma de San Luis Potosi

Saúl Méndez received the degree of Biomedical Engineer and the degree of Master in Electrical Engineering from the Universidad Autonoma de San Luis Potosi, San Luis Potosi, Mexico, in 2017 and 2020, respectively. He is currently a PhD. student in Electrical Engineering at the Autonomous University of San Luis Potosí.His main areas of interest are DC/DC converters, study of stability in DC microgrids, energy storage and controller design for power electronic systems.

Jorge Morales Saldaña, Universidad Autonoma de San Luis Potosi

Jorge Alberto Morales Saldana received the degree of Electrical Engineer and the degrees of Master and Ph.D. degrees in Electrical Engineering from the Universidad Autónoma de San Luis Potosi, San Luis Potosí, Mexico, in 1995, 1997 and 1999, respectively. He currently works at the Faculty of Engineering of the same University as a Research Professor. His main areas of interest are the development of high-efficiency switching converters, DC/DC conversion systems, resonant converters, dynamic analysis of DC power systems, robust analysis, and control engineering applied to power electronic systems.

Ivan Alfonso Reyes Portillo, Universidad Autónoma de Zacatecas

Iván Alfonso Reyes-Portillo received the degree of Electromechanical Engineer from the Instituto Tecnológico Superior de San Andrés Tuxtla, San Andrés Tuxtla, Veracruz, México in 2016 and the degree of Master of Science in Electronic Engineering from the Centro Nacional de Investigacion y Desarrollo Tecnológico, Cuernavaca, Morelos, México in 2019. Obtained a Ph.D. in Electrical Engineering from the Universidad Autónoma de San Luis Potosí, San Luis Potosí, México, in 2024. He is currently a professor at the Universidad Politecnica de San Luis Potosí, in the Academy of Industrial Systems and Technologies Engineering, and an associate researcher at the Universidad Autónoma de Zacatecas. His main areas of interest are DC/DC converters, redundant power processing converters, energy storage, and renewable energies.

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Published

2026-06-12

How to Cite

Méndez Elizondo, S. R., Morales Saldaña, J. ., & Reyes Portillo, I. A. (2026). Robust Stability Analysis of DC Microgrids. IEEE Latin America Transactions, 24(8), 836–845. Retrieved from https://latamt.ieeer9.org/index.php/transactions/article/view/10458

Issue

Vol. 24 No. 8 (2026): Ordinary Issue

Section

Electronics