2024

• Abdolmaleki, Babak; Simpson-Porco, John W.; Diaz, Gilbert Joseph Bergna. (2024) Distributed Optimization for Reactive Power Sharing and Stability of Inverter-Based Resources under Voltage Limits. IEEE Transactions on Smart Grid
  Academic article

2023

• Tutturen, Trond Markus; Diaz, Gilbert Joseph Bergna; Suul, Jon Are Wold. (2023) DC-Voltage Control Design under Saturation Nonlinearity by Using Singular Perturbation Theory.
  Academic chapter/article/Conference paper
• Abdolmaleki, Babak; Diaz, Gilbert Joseph Bergna. (2023) A Nonlinear Control Framework for Optimal Load-Sharing and Voltage Containment in DC Networks. IEEE Transactions on Power Systems
  Academic article

2022

• Abdolmaleki, Babak; Bergna-Diaz, Gilbert. (2022) Distributed Control and Optimization of DC Microgrids: A Port-Hamiltonian Approach. IEEE Access
  Academic article
• Ferreira, Daniele Menezes; Silva, Sidelmo; Silva, Waner; Brandao, Danilo; Bergna-Diaz, Gilbert; Tedeschi, Elisabetta. (2022) Overview of Consensus Protocol and Its Application to Microgrid Control. Energies
  Academic literature review
• Abdolmaleki, Babak; Diaz, Gilbert Joseph Bergna. (2022) Voltage Containment and Reactive Power-Sharing in Microgrids: Centralized and Distributed Approaches.
  Academic chapter/article/Conference paper

2021

• Ferreira, Daniele; Brandao, Danilo Iglesias; Bergna-Diaz, Gilbert; Tedeschi, Elisabetta; Silva, Sidelmo Magalhaes. (2021) Distributed Control Strategy for Low-Voltage Three-Phase Four-Wire Microgrids: Consensus Power-Based Control. IEEE Transactions on Smart Grid
  Academic article
• Haro-Larrode, Marta; Bergna-Diaz, Gilbert; Eguia, Pablo; Santos-Mugica, Maider. (2021) On the Tuning of Fractional Order Resonant Controllers for a Voltage Source Converter in a Weak AC Grid Context. IEEE Access
  Academic article
• Zonetti, Daniele; Bergna-Diaz, Gilbert; Ortega, Romeo; Monshizadeh, Nima. (2021) PID passivity-based droop control of power converters: Large-signal stability, robustness and performance. International Journal of Robust and Nonlinear Control
  Academic article
• Dejene, Firew Zerihun; Abedrabbo, Mudar; Bergna-Diaz, Gilbert; Beerten, Jef; Hertem, Dirk Van. (2021) Design of Robust MMC Controls Considering HVDC Grid Protection: Small Signal-Based Tuning. IEEE Transactions on Power Delivery
  Academic article

2020

• Viken, Egil; Bergna-Diaz, Gilbert. (2020) Towards Energy Management of an MMC With PV and BESS. Norges teknisk-naturvitenskapelige universitet Norges teknisk-naturvitenskapelige universitet
  Masters thesis
• Alves, Erick Fernando; Bergna-Diaz, Gilbert; Brandao, Danilo; Tedeschi, Elisabetta. (2020) Sufficient Conditions for Robust Frequency Stability of AC Power Systems. IEEE Transactions on Power Systems
  Academic article

2019

• Bergna-Diaz, Gilbert; Zonetti, Daniele; Acevedo, Santiago Sanchez; Ortega, Romeo; Tedeschi, Elisabetta. (2019) PI Passivity-Based Control and Performance Analysis of MMC Multiterminal HVDC Systems. IEEE Journal of Emerging and Selected Topics in Power Electronics
  Academic article
• Bergna-Diaz, Gilbert; Suul, Jon Are Wold; Berne, Erik; Vannier, Jean-Claude; Cabrera, Maria Marta Molinas. (2019) Optimal Shaping of the MMC Circulating Currents for Preventing AC-Side Power Oscillations from Propagating into HVdc Grids. IEEE Journal of Emerging and Selected Topics in Power Electronics
  Academic article
• Acevedo, Santiago Sanchez; Garces, Alejandro; Bergna-Diaz, Gilbert; Tedeschi, Elisabetta. (2019) Dynamics and Stability of Meshed Multiterminal HVDC Networks. IEEE Transactions on Power Systems
  Academic article
• Bergna-Diaz, Gilbert; Formentini, Andrea; Zanchetta, Pericle; Tedeschi, Elisabetta. (2019) Particle Swarm Optimization Tuning of Modular Multilevel Converters in a Time-Invariant Framework.
  Academic chapter/article/Conference paper

2018

• Bergna-Diaz, Gilbert; Freytes, Julian; Guillaud, Xavier; D'Arco, Salvatore; Suul, Jon Are Wold. (2018) Generalized voltage-based state-space modeling of modular multilevel converters with constant equilibrium in steady state. IEEE Journal of Emerging and Selected Topics in Power Electronics
  Academic article
• Ugalde-Loo, Carlos Ernesto; Wang, S.; Adeuyi, D.; Jenkins, N.; Liang, J.; D'Arco, Salvatore. (2018) Lessons learnt from the BEST PATHS project for the integration of offshore wind power plants using multi-terminal HVDC grids.
  Academic chapter/article/Conference paper
• Bergna-Diaz, Gilbert; Freytes, Julian; Guillaud, Xavier; D'Arco, Salvatore; Suul, Jon Are Wold. (2018) Analysis of MMC Dynamics in DQZ Coordinates for Vertical and Horizontal Energy Balancing Control.
  Academic chapter/article/Conference paper

2017

• Bergna-Diaz, Gilbert; Suul, Jon Are Wold; D'Arco, Salvatore. (2017) Energy-based state-space representation of modular multilevel converters with a constant equilibrium point in steady-state operation. IEEE transactions on power electronics
  Academic article
• Endegnanew, Atsede Gualu; Bergna-Diaz, Gilbert; Uhlen, Kjetil. (2017) Avoiding AC/DC grid interaction in MMC based MTDC Systems.
  Academic chapter/article/Conference paper
• Acevedo, Santiago Sanchez; Bergna-Diaz, Gilbert; Tedeschi, Elisabetta. (2017) Tuning of Control Loops for Grid-Connected Modular Multilevel Converters under a Simplified Port Representation for Large System Studies.
  Academic chapter/article/Conference paper
• Freytes, Julian; Diaz, Gilbert Bergna; Suul, Jon Are Wold; D'Arco, Salvatore; Gruson, Francois; Colas, Frederic. (2017) Improving small-signal stability of an MMC with CCSC by control of the internally stored energy. IEEE Transactions on Power Delivery
  Academic article
• Freytes, Julian; Bergna-Diaz, Gilbert; Suul, Jon Are Wold; D'Arco, Salvatore; Saad, Hani; Guillaud, Xavier. (2017) State-space modelling with steady-state time invariant representation of energy based controllers for modular multilevel converters.
  Academic chapter/article/Conference paper
• Flåten, Ida Langvik; Bergna-Diaz, Gilbert; Acevedo, Santiago Sanchez; Tedeschi, Elisabetta. (2017) Control of HVDC systems based on diode rectifier for offshore wind farm applications. Energy Procedia
  Academic article
• Bergna-Diaz, Gilbert; Acevedo, Santiago Sanchez; Tedeschi, Elisabetta. (2017) Port Hamiltonian Modelling of Modular Multilevel Converters with Fixed Equilibrium Point.
  Academic chapter/article/Conference paper
• Freytes, Julian; Diaz, Gilbert Bergna; Suul, Jon Are Wold; D'Arco, Salvatore; Saad, Hani; Guillaud, Xavier. (2017) Small-signal model analysis of droop-controlled modular multilevel converters with circulating current suppressing controller.
  Academic chapter/article/Conference paper
• Ugalde-Loo, Carlos Ernesto; Adeuyi, Oluwole Daniel; Wang, Sheng; Liang, Jun; Jenkins, Nick E.; Ceballos, Salvador J.. (2017) Open access simulation toolbox for the grid connection of offshore wind farms using multi-terminal HVDC networks.
  Academic chapter/article/Conference paper
• Bergna-Diaz, Gilbert; Zonetti, Daniele; Acevedo, Santiago Sanchez; Tedeschi, Elisabetta; Ortega, Romeo. (2017) PI passivity-based control of modular multilevel converters for multi-Terminal HVDC systems.
  Academic chapter/article/Conference paper
• Garces, Alejandro; Acevedo, Santiago Sanchez; Bergna-Diaz, Gilbert; Tedeschi, Elisabetta. (2017) HVDC meshed multi-terminal networks for offshore wind farms: Dynamic model, load flow and equilibrium.
  Academic chapter/article/Conference paper
• Acevedo, Santiago Sanchez; Bergna-Diaz, Gilbert; Tedeschi, Elisabetta; D'Arco, Salvatore; Sanz, Marina. (2017) Impedance computation for power electronic converters with Hilbert transform.
  Academic chapter/article/Conference paper

2016

• Bergna-Diaz, Gilbert; Suul, Jon Are Wold; D'Arco, Salvatore. (2016) Impact on Small-Signal Dynamics of Using Circulating Currents Instead of AC-Currents to Control the DC Voltage in MMC HVDC Terminals.
  Academic chapter/article/Conference paper
• Carrizosa, Miguel Jimenez; Diaz, Gilbert Bergna; Arzande, Amir; Damm, Gilney R.; Alou, Pedro; Benchaib, Abdelkrim. (2016) Stability of DC/DC three terminals converter using Modular Multilevel Converters for HVDC systems.
  Academic chapter/article/Conference paper
• Stankovic, Nikola; Diaz, Gilbert Bergna; Arzande, Amir; Berne, Erik; Egrot, Philippe; Vannier, Jean Claude. (2016) A digital control algorithm for modular multilevel converters.
  Academic chapter/article/Conference paper
• Diaz, Gilbert Bergna; Suul, Jon Are Wold; D'Arco, Salvatore. (2016) State-space modelling of modular multilevel converters for constant variables in steady-state.
  Academic chapter/article/Conference paper
• Diaz, Gilbert Bergna; D'Arco, Salvatore; Suul, Jon Are Wold; Hernes, Magnar. (2016) Analysis of power cycling for semiconductor devices in modular multilevel converters.
  Academic chapter/article/Conference paper
• Beerten, Jef; Diaz, Gilbert Bergna; D'Arco, Salvatore; Suul, Jon Are Wold. (2016) Comparison of small-signal dynamics in MMC and two-level VSC HVDC transmission schemes.
  Academic chapter/article/Conference paper
• Endegnanew, Atsede Gualu; Uhlen, Kjetil; Diaz, Gilbert Bergna; Beerten, Jef. (2016) Small-signal modelling of an MMC-based HVDC link interfacing large AC systems.
  Academic chapter/article/Conference paper

2015

• Diaz, Gilbert Bergna; Suul, Jon Are Wold; D'Arco, Salvatore. (2015) Small-signal state-space modeling of modular multilevel converters for system stability analysis.
  Academic chapter/article/Conference paper
• Stancovic, Nicola; Diaz, Gilbert Bergna; Arzande, Amir; Berne, Erik; Egret, Philippe; Vannier, Jean Claude. (2015) An optimization-based control strategy for modular multilevel converters: Design and implementation.
  Academic chapter/article/Conference paper
• Cisneros, R; Pirro, M; Diaz, Gilbert Bergna; Ortega, R.; Ippoliti, G.; Cabrera, Maria Marta Molinas. (2015) Global tracking passivity-based pi control of bilinear systems and its application to the boost and modular multilevel converters. IFAC-PapersOnLine
  Academic article
• Diaz, Gilbert Bergna. (2015) Modular Multilevel Converter Control for HVDC Operation. NTNU NTNU
  Doctoral dissertation
• Pescetto, Paolo; Diaz, Gilbert Bergna; Zubimendi, Ignacio; Tedeschi, Elisabetta. (2015) Comparison of Parallel Connected Medium Voltage Grid Side VSCs for Offshore Wind Turbines.
  Academic chapter/article/Conference paper

2014

• Acevedo, Santiago Sanchez; Ortega, Romeo; Grino, Robert; Diaz, Gilbert Bergna; Cabrera, Maria Marta Molinas. (2014) Conditions for existence of equilibria of systems with constant power loads. IEEE Transactions on Circuits and Systems I: Regular Papers
  Academic article
• Bergna-Diaz, Gilbert; Suul, Jon Are Wold; Berne, E; Vannier, Jean-Claude; Cabrera, Maria Marta Molinas. (2014) MMC circulating current reference calculation in ABC frame by means of Lagrange Multipliers for ensuring constant DC power under unbalanced grid conditions.
  Academic chapter/article/Conference paper
• Diaz, Gilbert Bergna; Acevedo, Santiago Sanchez; Berne, E; Egrot, Phillipe; Vannier, J.C; Cabrera, Maria Marta Molinas. (2014) Frequency Scanning of Power Electronic-based Smart Grids: The Modular Multilevel Converter Application.
  Academic chapter/article/Conference paper
• Olguin, Raymundo E. Torres; Garces, A; Diaz, Gilbert Bergna. (2014) HVDC transmission for offshore wind farms.
  Academic chapter/article/Conference paper
• Acevedo, Santiago Sanchez; Diaz, Gilbert Bergna; Berne, E; Egrot, P; Vannier, J-C; Cabrera, Maria Marta Molinas. (2014) Frequency Scanning of Power Electronic-based Smart Grids: The Modular Multilevel Converter.
  Academic chapter/article/Conference paper
• Diaz, Gilbert Bergna; Ruiz, Alejandro Garces; Berne, E; Egrot, P; Arzande, A; Vannier, Jean-Claude. (2014) A generalized power control approach in ABC frame for modular multilevel converter HVDC links based on mathematical optimization. IEEE Transactions on Power Delivery
  Academic article

2013

• Bergna, Gilbert; Berne, E; Egrot, P; Lefranc, P; Arzande, A; Vannier, J-C. (2013) An Energy-Based Controller for HVDC Modular Multilevel Converter in Decoupled Double Synchronous Reference Frame for Voltage Oscillation Reduction. IEEE transactions on industrial electronics (1982. Print)
  Academic article
• Bergna, Gilbert; Berne, E; Ruiz, Alejandro Garces; Egrot, P; Vannier, J-C; Cabrera, Maria Marta Molinas. (2013) A generalized power control approach in ABC frame for modular multilevel converters based on Lagrange multipliers.
  Academic chapter/article/Conference paper
• Acevedo, Santiago Sanchez; Ortega, Romeo; Bergna, Gilbert; Cabrera, Maria Marta Molinas; Grino, Robert. (2013) Conditions for Existence of Equilibrium Points of Systems with Constant Power Loads.
  Academic chapter/article/Conference paper
• Bergna, Gilbert; Suul, Jon Are Wold; Berne, E; Egrot, P; Vannier, J-C; Cabrera, Maria Marta Molinas. (2013) Generalized ABC Frame Differential Current Control ensuring constant DC Power for Modular Multilevel Converters under Unbalanced Operation.
  Academic chapter/article/Conference paper
• Bergna, Gilbert; Suul, Jon Are Wold; Berne, Erik; Egrot, Philippe; Vannier, Jean-Claude; Cabrera, Maria Marta Molinas. (2013) Analysis of Modular Multilevel Converters under Unbalanced Grid Conditions with different Load Current Control Strategies and Lagrange-based Differential Current Control.
  Academic chapter/article/Conference paper
• Bergna, Gilbert; Suul, Jon Are Wold; Graces, Alejandro; Berne, Erik; Egrot, Philippe; Arzande, Amir. (2013) Improving the Dynamics of Lagrange-based MMC Controllers by means of Adaptive Filters for Single-Phase Voltage, Power and Energy Estimation.
  Academic chapter/article/Conference paper

2012

• Bergna, Gilbert; Suul, Jon Are Wold; Berne, Erik; Egrot, Philippe; Lefranc, Pierre; Vannier, Jean-Claude. (2012) Mitigating DC-side power oscillations and negative sequence load currents in Modular Multilevel Converters under unbalanced faults - first approach using resonant PI.
  Academic chapter/article/Conference paper