Proceedings ArticleDOI
Impact of grid-forming control on the internal energy of a modular multilevel converter
Ebrahim Rokrok,Taoufik Qoria,Antoine Bruyere,Bruno Francois,Haibo Zhang,Moez Belhaouane,Xavier Guillaud +6 more
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TLDR
It has been shown that the dynamic behavior of a grid-forming controlled MMC with internal energy control is identical to an equivalent 2-level Voltage Source Converter (VSC).Abstract:
This paper presents a comparative analysis regarding the dynamic behavior of a Modular Multi-level Converter (MMC) with grid-forming control either with or without controlling the MMC internal energy. It has been demonstrated that the internal energy of the MMC in low-level control interacts with the high-level control, which is performed by a grid-forming scheme. In case of controlling the internal energy of the MMC, this interaction is mitigated. Moreover, it has been shown that the dynamic behavior of a grid-forming controlled MMC with internal energy control is identical to an equivalent 2-level Voltage Source Converter (VSC).read more
Citations
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Journal ArticleDOI
Modular Multilevel Converters: Recent Achievements and Challenges
TL;DR: A review of the research and development achieved during the last years on MMCs is shown, focusing on the challenges and proposed solutions for this power converter still faces in terms of modeling, control, reliability, power topologies, and new applications as discussed by the authors.
Proceedings ArticleDOI
Testing Requirements and Control Strategies of Next-Generation Grid Emulator: A Review
Zejie Li,Pavani Ponnaganti,Fang Fang Zhao,Xiongfei Wang,Birgitte Bak-Jensen,Stig Munk-Nielsen,Frede Blaabjerg +6 more
TL;DR:
Proceedings ArticleDOI
Testing Requirements and Control Strategies of Next-Generation Grid Emulator: A Review
TL;DR: In this paper , the authors provide an overview of testing requirements and control strategies for the modular multilevel converter (MMC)-based grid emulator, which is used for grid-code compliance testing of wind turbines.
Journal ArticleDOI
Impact analysis of energy-based control structures for grid-forming and grid-following MMC on power system dynamics based on eigenproperties indices
TL;DR: In this article , the impact of the modular multilevel converter (MMC) energy control in the system dynamics when grid-forming and grid-following control schemes are used in the same system is addressed.
Proceedings ArticleDOI
Adaptive Filtering for Energy Control of a Modular Multilevel Converter Operated as a Virtual Synchronous Machine Under Unbalanced Conditions
TL;DR: In this article , a frequency-adaptive filtering strategy is proposed for improving the dynamic response of the MMC energy control loops included in the control system, which is based on Second Order Generalized Integrators (SOGIs) configured as adaptive notch filters, which are made frequencyadaptive by utilizing the virtual speed of the VSM.
References
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Journal ArticleDOI
A Steady-State Analysis Method for a Modular Multilevel Converter
TL;DR: In this article, a steady-state analysis method for an MMC-based VSC-HVDC system is proposed to find a circular interaction among the electrical quantities in a MMC and a key equation can be established to solve the unknown circulating current.
Journal ArticleDOI
An Energy-Based Controller for HVDC Modular Multilevel Converter in Decoupled Double Synchronous Reference Frame for Voltage Oscillation Reduction
Gilbert Bergna,E. Berne,Philippe Egrot,Pierre Lefranc,Amir Arzande,J.-C. Vannier,Marta Molinas +6 more
TL;DR: A regulation strategy capable of controlling the energy stored in the modular multilevel converter (MMC) in an HVDC configuration by regulating the positive, negative, and zero sequences in dqo coordinates of the differential current using two rotating reference frames.
Journal ArticleDOI
Improving Small-Signal Stability of an MMC With CCSC by Control of the Internally Stored Energy
Julian Freytes,Gilbert Bergna,Jon Are Suul,Salvatore D'Arco,Francois Gruson,Frederic Colas,Hani Saad,Xavier Guillaud +7 more
TL;DR: In this paper, the dc-side dynamics of modular multilevel converters (MMCs) are analyzed using a detailed state-space model of the MMC, which is formulated to obtain constant variables in steady state.
Proceedings ArticleDOI
Tuning of Cascaded Controllers for Robust Grid-Forming Voltage Source Converter
TL;DR: An algorithm for calculating the controller parameters of a grid-forming converter which guarantee a stable behavior for many different configurations of the grid is presented.
Proceedings ArticleDOI
Energetic macroscopic representation and inversion based control of a modular multilevel converter
TL;DR: In this paper, a formal analysis of the MMC model is presented, which leads to the design of a control algorithm thanks to the inversion of the model, and the Energetic Macroscopic Representation is used for achieving this goal.