2024

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

2022

• Menezes Ferreira, Daniele; 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; Bergna Diaz, Gilbert Joseph. (2022) Voltage Containment and Reactive Power-Sharing in Microgrids: Centralized and Distributed Approaches. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Abdolmaleki, Babak; Bergna-Diaz, Gilbert. (2022) Distributed Control and Optimization of DC Microgrids: A Port-Hamiltonian Approach. IEEE Access
  Academic article

2021

• 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
• 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
• 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; Van Hertem, Dirk. (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; Suul, Jon Are Wold; Berne, Erik; Vannier, Jean-Claude; Molinas Cabrera, Maria Marta. (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
• Bergna-Diaz, Gilbert; Zonetti, Daniele; Sanchez Acevedo, Santiago; 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
• Sanchez Acevedo, Santiago; 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. IEEE conference proceedings
  Academic chapter/article/Conference paper

2018

• 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. CIGRE (Conseil international des grands réseaux électriques)
  Academic chapter/article/Conference paper
• Bergna-Diaz, Gilbert; Bergna-Diaz, Gilbert; Tedeschi, Elisabetta. (2018) A plug-and-play grid for the transmission of large amounts of offshore energy .
  Website (informational material)
• 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
• 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. IEEE conference proceedings
  Academic chapter/article/Conference paper

2017

• Bergna-Diaz, Gilbert; Sanchez Acevedo, Santiago; Tedeschi, Elisabetta. (2017) Port Hamiltonian Modelling of Modular Multilevel Converters with Fixed Equilibrium Point. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Sanchez Acevedo, Santiago; 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. IEEE conference proceedings
  Academic chapter/article/Conference paper
• 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
• Freytes, Julian; Bergna Diaz, Gilbert; 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
• Bergna-Diaz, Gilbert; Zonetti, Daniele; Sanchez Acevedo, Santiago; Tedeschi, Elisabetta; Ortega, Romeo. (2017) PI passivity-based control of modular multilevel converters for multi-Terminal HVDC systems. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Garces, Alejandro; Sanchez Acevedo, Santiago; Bergna-Diaz, Gilbert; Tedeschi, Elisabetta. (2017) HVDC meshed multi-terminal networks for offshore wind farms: Dynamic model, load flow and equilibrium. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Sanchez Acevedo, Santiago; Bergna-Diaz, Gilbert; Tedeschi, Elisabetta; D'Arco, Salvatore; Sanz, Marina. (2017) Impedance computation for power electronic converters with Hilbert transform. IEEE conference proceedings
  Academic chapter/article/Conference paper
• 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. IEEE Press
  Academic chapter/article/Conference paper
• Flåten, Ida Langvik; Bergna-Diaz, Gilbert; Sanchez Acevedo, Santiago; Tedeschi, Elisabetta. (2017) Control of HVDC systems based on diode rectifier for offshore wind farm applications. Energy Procedia
  Academic article
• 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. IET Digital Library
  Academic chapter/article/Conference paper
• Endegnanew, Atsede Gualu; Bergna-Diaz, Gilbert; Uhlen, Kjetil. (2017) Avoiding AC/DC grid interaction in MMC based MTDC Systems. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Freytes, Julian; Bergna Diaz, Gilbert; 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. IET Digital Library
  Academic chapter/article/Conference paper

2016

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

2015

• Stancovic, Nicola; Bergna Diaz, Gilbert; Arzande, Amir; Berne, Erik; Egret, Philippe; Vannier, Jean Claude. (2015) An optimization-based control strategy for modular multilevel converters: Design and implementation. Curran Associates, Inc.
  Academic chapter/article/Conference paper
• Pescetto, Paolo; Bergna Diaz, Gilbert; Zubimendi, Ignacio; Tedeschi, Elisabetta. (2015) Comparison of Parallel Connected Medium Voltage Grid Side VSCs for Offshore Wind Turbines. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Bergna Diaz, Gilbert; Suul, Jon Are Wold; D'Arco, Salvatore. (2015) Small-signal state-space modeling of modular multilevel converters for system stability analysis. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Cisneros, R; Pirro, M; Bergna Diaz, Gilbert; Ortega, R.; Ippoliti, G.; Molinas Cabrera, Maria Marta. (2015) Global tracking passivity-based pi control of bilinear systems and its application to the boost and modular multilevel converters. IFAC-PapersOnLine
  Academic article
• Bergna Diaz, Gilbert. (2015) Modular Multilevel Converter Control for HVDC Operation. Doktoravhandlinger ved NTNU (2015:143)
  Doctoral dissertation

2014

• Sanchez Acevedo, Santiago; Bergna Diaz, Gilbert; Berne, E; Egrot, P; Vannier, J-C; Molinas Cabrera, Maria Marta. (2014) Frequency Scanning of Power Electronic-based Smart Grids: The Modular Multilevel Converter. IET Digital Library
  Academic chapter/article/Conference paper
• Bergna-Diaz, Gilbert; Suul, Jon Are Wold; Berne, E; Vannier, Jean-Claude; Molinas Cabrera, Maria Marta. (2014) MMC circulating current reference calculation in ABC frame by means of Lagrange Multipliers for ensuring constant DC power under unbalanced grid conditions. Curran Associates, Inc.
  Academic chapter/article/Conference paper
• Torres Olguin, Raymundo E.; Garces, A; Bergna Diaz, Gilbert. (2014) HVDC transmission for offshore wind farms. Springer
  Academic chapter/article/Conference paper
• Bergna Diaz, Gilbert; Sanchez Acevedo, Santiago; Berne, E; Egrot, Phillipe; Vannier, J.C; Molinas Cabrera, Maria Marta. (2014) Frequency Scanning of Power Electronic-based Smart Grids: The Modular Multilevel Converter Application. IET Digital Library
  Academic chapter/article/Conference paper
• Bergna Diaz, Gilbert; Garces Ruiz, Alejandro; 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
• Sanchez Acevedo, Santiago; Ortega, Romeo; Grino, Robert; Bergna Diaz, Gilbert; Molinas Cabrera, Maria Marta . (2014) Conditions for existence of equilibria of systems with constant power loads. IEEE Transactions on Circuits and Systems I: Regular Papers
  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; Suul, Jon Are Wold; Berne, Erik; Egrot, Philippe; Vannier, Jean-Claude; Molinas Cabrera, Maria Marta . (2013) Analysis of Modular Multilevel Converters under Unbalanced Grid Conditions with different Load Current Control Strategies and Lagrange-based Differential Current Control. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Bergna, Gilbert; Suul, Jon Are Wold; Berne, E; Egrot, P; Vannier, J-C; Molinas Cabrera, Maria Marta . (2013) Generalized ABC Frame Differential Current Control ensuring constant DC Power for Modular Multilevel Converters under Unbalanced Operation. IEEE Press
  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. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Sanchez Acevedo, Santiago; Ortega, Romeo; Bergna, Gilbert; Molinas Cabrera, Maria Marta ; Grino, Robert. (2013) Conditions for Existence of Equilibrium Points of Systems with Constant Power Loads. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Bergna, Gilbert; Berne, E; Garces Ruiz, Alejandro; Egrot, P; Vannier, J-C; Molinas Cabrera, Maria Marta . (2013) A generalized power control approach in ABC frame for modular multilevel converters based on Lagrange multipliers. IEEE conference proceedings
  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. Curran Associates, Inc.
  Academic chapter/article/Conference paper