Associate Professor School of Electrical and Electronic Engineering Universidad del Valle Ciudad Universitaria – Meléndez Calle 13 No. 100-00, A.A. 25360 Building E53, Office 2039 Cali, Colombia Email:   Esta dirección de correo electrónico está siendo protegida contra los robots de spam. Necesita tener JavaScript habilitado para poder verlo. Phone:  +57 (2) 3212100 - 8404

Biography

Hold a Ph.D. in Electrical Engineering, awarded Cum Laude. My educational background includes a master's degree in engineering and an undergraduate degree in control engineering. I currently serve as a full-time professor at the School of Electrical and Electronic Engineering, Universidad del Valle (2025–present). I previously completed a postdoctoral position at the University of Central Florida (2024) and served as a research specialist at King Abdullah University of Science and Technology (2023). I have gained valuable international experience as a visiting researcher at prestigious research centers in Switzerland and Mexico. Throughout my career, I have successfully prepared research proposals and disseminated findings through publications in high-impact journals, book chapters, and international conferences. My technical expertise includes the design and implementation of power electronic converters, as well as real-time simulation with hardware-in-the-loop (HIL) for power systems using platforms such as OPAL, Typhoon, Compaq Rio, DSPs (Texas Instruments), and FPGAs. I also have practical experience with MATLAB & Simulink, Python, OpenDSS, Matpower, PSIM, EAGLE, LabVIEW, Code Composer Studio, RTLab, and advanced programming in C.

Publications

Journals

1. G. E. Mejia-Ruiz, V. C. Pandey, and M. L. Orozco-Gutierrez, “Multi-Agent Hierarchical Consensus Framework for Frequency and Voltage Regulation with Cooperative Battery Storage Units,” Journal of Energy Storage, vol. 153, p. 120955, 2026.

2. G. E. Mejia-Ruiz, G. Marasini, Q. Zhihua, S. Kundu, and S. Pushpak, “Cybersecurity Challenges in Power Networks with Distributed Energy Resources: A Comprehensive Survey,” Renewable and Sustainable Energy Reviews, vol. 224, p. 116100, 2025.

3. G. E. Mejia-Ruiz, M. R. A. Paternina, Z. Qu, S. Ahmed, and C. Konstantinou, “Multiple Ancillary Services Provision by Optimal Control of Aggregated Inverter-Based Resources,” International Journal of Electrical Power & Energy Systems, vol. 171, p. 110953, 2025.

4. A. Sanchez-Ocampo, M. R. A. Paternina, J. M. Ramos-Guerrero, G. E. Mejia-Ruiz, et al., “Real-Time Inertia Estimation via ARMAX Model Representation and Synchrophasor Measurements,” IEEE Latin America Transactions, vol. 23, no. 5, pp. 405–414, 2025.

5. J. A. de la O. Serna, A. Zamora-Mendez, G. E. Mejia-Ruiz, M. R. A. Paternina, et al., “Fast Taylor-Fourier Transform for Monitoring Modern Power Grids with Real-Time Dynamic Harmonic Estimation,” IEEE Transactions on Power Delivery, vol. 39, no. 4, pp. 2242–2252, Aug. 2024. doi: 10.1109/TPWRD.2024.3400157.

6. E. J. Martínez-Salgado, G. E. Mejia-Ruiz, J. M. Ramos-Guerrero, M. R. A. Paternina, J. de la Cruz, and H. R. Chamorro, “Accurate Design, Simulation and Implementation of AC/DC Inductors for Power Electronic Converters,” IET Power Electronics, vol. 17, no. 16, pp. 2730–2740, 2024. doi: 10.1049/pel2.12764.

7. G. E. Mejia-Ruiz, M. R. Arrieta-Paternina, M. Ramirez-Gonzalez, F. R. S. Sevilla, and P. Korba, “Real-Time Co-simulation of Transmission and Distribution Networks Integrated with Distributed Energy Resources for Frequency and Voltage Support,” Applied Energy, vol. 347, p. 121046, 2023. doi: 10.1016/j.apenergy.2023.121046. IF = 11.4.

8. G. E. Mejia-Ruiz, M. R. A. Paternina, J. A. de la O. Serna, and A. Zamora-Mendez, “O Splines-Based Fixed- Frequency Integral Sliding-Mode Controller for PFC Rectifier,” IEEE Transactions on Power Electronics, vol. 38, no. 8, pp. 9448–9458, Aug. 2023. doi: 10.1109/TPEL.2023.3270268. IF = 6.15.

9. M. R. Arrieta Paternina, C. Castrillón-Franco, A. Zamora-Mendez, G. E. Mejia-Ruiz, et al., “Enhancing Wide-Area Damping Controllers via Data-Assisted Power System Linear Models,” Electric Power Systems Research, vol. 217, p. 109085, 2023. doi: 10.1016/j.epsr.2022.109085. IF = 4.63.

10. J. R. Rodriguez, G. E. Mejia-Ruiz, M. R. A. Paternina, and A. Velazquez-Ibanez, “A Single-Loop and Current-Sensorless Control for On-Grid Seven-Level Photovoltaic Microinverter,” IET Power Electronics, vol. 16, no. 6, pp. 905–916, 2023. IF = 2.112.

11. D. Rodales, A. Zamora-Mendez, J. A. de la O. Serna, J. M. Ramirez, and G. E. Mejia-Ruiz, “Model-Free Inertia Estimation in Bulk Power Grids Through O-Splines,” International Journal of Electrical Power & Energy Systems, vol. 153, p. 109323, 2023. ISSN 0142-0615. IF = 4.63.

12. G. E. Mejia-Ruiz, M. R. A. Paternina, F. R. S. Sevilla, and P. Korba, “Fast Hierarchical Coordinated Controller for Distributed Battery Energy Storage Systems to Mitigate Voltage and Frequency Deviations,” Applied Energy, vol. 323, p. 119622, 2022. IF = 11.4.

13. G. E. Mejia-Ruiz, M. R. A. Paternina, A. Zamora-Mendez, J. C. Rosas-Caro, and G. Bolivar-Ortiz, “A Novel GaN-Based Solid-State Circuit Breaker with Voltage Overshoot Suppression,” IEEE Transactions on Industrial Electronics, vol. 69, no. 9, pp. 8949–8960, Sep. 2022. doi: 10.1109/TIE.2021.3116557. IF = 8.16.

14. G. E. Mejia-Ruiz, J. M. Ramos-Guerrero, M. R. A. Paternina, J. de la Cruz, A. Zamora-Mendez, and A. P. P. Sandoval, “Enhancing Grid Integration and Design of Low Speed PMSGs by Exploiting SRF-PLLBased Sensorless Control and Holistic Modeling,” IEEE Transactions on Energy Conversion, vol. 37, no. 4, pp. 2962–2973, Dec. 2022. doi: 10.1109/TEC.2022.3199166. IF = 4.9.

15. G. E. Mejia-Ruiz, M. R. A. Paternina, J. R. Rodriguez-Rodriguez, J. M. Ramirez, A. Zamora-Mendez, and G. Bolivar-O., “A System Identification-Based Modeling Framework of Bidirectional DC-DC Converters for Power Grids,” Journal of Modern Power Systems and Clean Energy, vol. 10, no. 3, pp. 788–799, May 2022. doi: 10.35833/MPCE.2020.000836. IF = 4.5.

16. G. E. Mejia-Ruiz, R. Cardenas-Javier, M. R. Arrieta Paternina, J.R. Rodriguez-Rodriguez, J. M. Ramirez, and A. Zamora-Mendez, “Coordinated Optimal Volt/Var Control for Distribution Networks via D-PMUs and EV Chargers by Exploiting the Eigensystem Realization,” IEEE Transactions on Smart Grid, vol. 12, no. 3, pp. 2425–2438, 2021. IF = 10.3.

17. A. Zamora-Mendez, J. Sotelo-Castañón, M. R. Arrieta Paternina, et al., “Two Effective Methods for Impedance Estimation in Distance Relays Based on the DC Offset Removal,” Electric Power Systems Research, vol. 194, p. 107102, 2021. doi: 10.1016/j.epsr.2021.107102. IF = 4.63.

18. J. R. Ortiz-Castrillón, G. E. Mejía-Ruiz, N. Muñoz-Galeano, J. M. López-Lezama, and S. D. Saldarriaga- Zuluaga, “PFC Single-Phase AC/DC Boost Converters: Bridge, Semi-Bridgeless, and Bridgeless Topologies,” Applied Sciences, vol. 11, no. 16, p. 7651, 2021. doi:10.3390/app11167651. IF = 2.92.

19. J. R. Ortiz-Castrillón, G. E. Mejía-Ruiz, N. Muñoz-Galeano, J. M. López-Lezama, and J. B. Cano-Quintero, “A Sliding Surface for Controlling a Semi-Bridgeless Boost Converter with Power Factor Correction and Adaptive Hysteresis Band,” Applied Sciences, vol. 11, no. 4, p. 1873, 2021. doi: 10.3390/app11041873. IF =2.92.

20. G. E. Mejia-Ruiz, N. Muñoz-Galeano, and J. R. Ortiz-Castrillón, “Adaptive Hysteresis Band for a Bridgeless Boost AC-DC Converter with PFC and Slide Mode Control,” Información Tecnológica, 2019. ISSN 0718-0764. doi: 10.4067/S0718-07642019000400283.

21. G. E. Mejia-Ruiz and N. Muñoz-Galeano, “Modeling and Development of a Bridgeless PFC Boost Rectifier,” Revista Facultad de Ingeniería, 2017. ISSN 0120-6230. doi: 10.17533/udea.redin.n82a02.

22. G. E. Mejia-Ruiz and N. Muñoz-Galeano, “Novel Procedure for the Snubbers RCD Design and Mathematical Deduction of the Equations,” Información Tecnológica, 2015. ISSN 0718-0764. doi: 10.4067/S0718-07642015000200014.

Books Chapters

1. G. E. Mejia-Ruiz, M. R. Arrieta Paternina, J. M. Ramirez, J. R. Rodríguez-Rodríguez, R. Cárdenas-Javier, and A. Zamora-Mendez, “Decongestion of Active Distribution Grids via D-PMUs-Based Reactive Power Control and Electric Vehicle Chargers,” in Flexibility in Electric Power Distribution Networks. Taylor & Francis, ISBN 9780367641412, July 2021. https://www.routledge.com/9780367641412.

2. V. Torres-García, G. Castillo-García, G. Mejía-Ruiz, and M. R. Arrieta-Paternina, “Dynamic Voltage Restorer Controlled per Independent Phases for Power Quality Sags-Swells Mitigation Under Unbalanced Conditions,” in Monitoring and Control of Electrical Power Systems Using Machine Learning Techniques. Elsevier, 2023.

Conferences Papers

1. L. R. Merchan-Villalba, M. Á. Gómez-Martínez, R. Domínguez-Navarrete, et al., “ATP-EMTP-Based Energy Storage System Model for High-Performance Transient Simulation in Power Grids,” 2025 IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC), 2025.

2. A. Alfaro-Bernardino, A. Zamora, J. G. Rueda-Escobedo, M. R. A. Paternina, and G. Mejia-Ruiz, “Virtual Inertia Provision Through the Super-Twisting Algorithm,” IEEE PES General Meeting (PESGM), Seattle, WA, USA, 2024, pp. 1–5. doi: 10.1109/PESGM51994.2024.10689022.

3. G. Marasini, Z. Qu, and G. E. Mejia-Ruiz, “Resilient Cooperative Control of Passivity-Short Systems Against Man-in-the-Middle Attacks,” IFAC-PapersOnLine, vol. 58, no. 30, pp. 296–301, 2024.

4. G. E. Mejia-Ruiz, Y. Batmani, S. Lakshminarayana, S. Ahmed, and C. Konstantinou, “Communication Reduction for Power Systems: An Observer-Based Event-Triggered Approach,” IEEE SmartGridComm, Glasgow, UK, 2023, pp. 1–7. doi: 10.1109/SmartGridComm57358.2023.10333946.

5. J. Ramos-Guerrero, G. Mejia-Ruiz, M. Paternina, J. de la Cruz, et al., “Enhancing Grid Integration and Design of Low Speed PMSGs by Exploiting SRF-PLL-Based Sensorless Control and Holistic Modeling,” IEEE PES General Meeting (PESGM), 2023, pp. 1–1.

6. A. Esparza, I. Moreno, M. A. Mantilla, G. E. Mejía-Ruiz, and M. J. Blondin, “A Voltage Support Strategy Based on a Per-Phase Controlled Inverter in Faulty Networks,” IEEE PES GTD Latin America, La Paz, Bolivia, 2022, pp. 1–5.

7. G. Mejía-Ruiz, M. R. A. Paternina, J. R. Rodríguez, A. Zamora, G. Bolivar-Ortiz, and C. Toledo-Santos, “A Bidirectional Isolated Charger for Electric Vehicles in V2G Systems with the Capacity to Provide Ancillary Services,” 52nd NAPS, Tempe, AZ, USA, 2021, pp. 1–6. doi: 10.1109/NAPS50074.2021.9449674.

8. G. E. Mejia-Ruiz, R. Cárdenas, M. R. A. Paternina, A. Zamora, and C. Toledo-Santos, “Phasor-Based Optimal Voltage Control for Distribution Grids Through D-PMUs and EV Battery Charger,” NAPS, College Station, TX, USA, 2021, pp. 1–6. doi: 10.1109/NAPS52732.2021.9654753.

9. C. Toledo-Santos, G. E. Mejía-Ruiz, M. R. A. Paternina, A. Zamora, and D. Dotta, “Building up a Wide-Area Protection System Simulator,” 52nd NAPS, Tempe, AZ, USA, 2021, pp. 1–6. doi: 10.1109/NAPS50074.2021.9449798.

10. S. Aguayo-Tapia, M. R. A. Paternina, G. E. Mejía-Ruiz, D. A. García, and A. Zamora, “A Comprehensible Technical and Financial Methodology for DC/AC Microgrids Design,” 52nd NAPS, Tempe, AZ, USA, 2021, pp. 1–6. doi: 10.1109/NAPS50074.2021.9449818.

11. G. G. Suárez-Velázquez, G. E. Mejia-Ruiz, and P. M. García-Vite, “Control and Grid Connection of Fuel Cell Power System,” IEEE ROPEC, Ixtapa, Mexico, 2020, pp. 1–5. doi: 10.1109/ROPEC50909.2020.9258729.

12. G. E. Mejía-Ruiz, J. R. Rodríguez, M. R. A. Paternina, N. Muñoz-Galeano, and A. Zamora, “Grid-Connected Three-Phase Inverter System with LCL Filter: Model, Control and Experimental Results,” IEEE PES ISGT Latin America, Gramado, Brazil, 2019, pp. 1–6. doi: 10.1109/ISGTLA.2019.8895017.

13. J. C. Silva, A. Zamora, M. R. A. Paternina, and G. E. Mejía-Ruiz, “An Adaptable Hybrid Optimization Algorithm for Solving the Economic and Emission Dispatch Problem,” IEEE PES ISGT Latin America, Gramado, Brazil, 2019, pp. 1–6. doi: 10.1109/ISGT-LA.2019.8895495.

14. G. E. Mejía Ruiz, N. Muñoz, and J. B. Cano, “Design Methodologies and Programmable Devices Used in Power Electronic Converters — A Survey,” IEEE PEPQA, Bogotá, Colombia, 2015, pp. 1–6. doi: 10.1109/PEPQA.2015.7168214.

15. G. E. Mejía Ruiz, N. Muñoz, and J. B. Cano, “Modeling, Analysis and Design Procedure of LCL Filter for Grid Connected Converters,” IEEE PEPQA, Bogotá, Colombia, 2015, pp. 1–6. doi: 10.1109/PEPQA.2015.7168215.

16. G. E. Mejía Ruiz, N. Muñoz, and J. M. Ramirez, “Transient Voltage Compensation by a Power Electronics-Based Device,” IEEE PES General Meeting, National Harbor, MD, USA, 2014, pp. 1–5. doi: 10.1109/PESGM.2014.6939083.

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