EPE Association: EPE 2025 - LS1a: AC/DC and DC/AC Converter Topologies

EPE 2025 - LS1a: AC/DC and DC/AC Converter Topologies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2025 - Conference > EPE 2025 - Topic 09: Power Converter Topologies > EPE 2025 - LS1a: AC/DC and DC/AC Converter Topologies

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   Advanced DC Voltage Control Technique for Converters: Achieving Superior Speed and Stability with Model Predictive Control
By Farrukh ZEB, Mobina POURESMAEIL, Edris POURESMAEIL, Jorma KYYRA [View]
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Abstract: Among different converter topologies, the active front-end (AFE) rectifier has been widely used in recent research for generating controlled output DC power. Simultaneously, model predictive control (MPC) has emerged as a prominent and actively researched topic, particularly for its applications in development of advanced control strategies. In this paper, a control method is presented that leverages the predictive capability of MPC to achieve the desired reference power through the DC power generated by the AFE rectifier. A new exponential function has been introduced in the proposed control method as a dynamic reference power for the MPC. This reference power can be updated according to the DC-link voltage requirements for an effective DC voltage regulation. Finally, the performance of the proposed control method is compared with the performance of the conventional PI-based control method and preceding MPC-based control techniques, to validate its superiority over the existing control methods. Implemented and verified in Matlab Simulink, this technique shows five-time faster recovery and zero steady state error.

   An AC fault ride-through control of modular multilevel converters for HVDC systems
By Sidlawendé OUOBA, Florent MOREL [View]
[Download]

Abstract: This paper proposes a modified threshold virtual impedance (MTVI) control to ensure an AC fault ride-through (FRT) for modular multilevel converters (MMCs). The proposal limits the AC current of the MMC by virtually increasing its output impedance. It prevents to trigger its protection systems when a fault occurs. Compared with conventional TVI control, the proposed method avoids not only MMC blocking but also increases its power quality by providing undistorted voltage and current waveforms in the case of asymmetrical faults. Simulations in MATLAB/Simulink are carried out to validate the effectiveness of the proposed MTVI control, which is compared with the conventional TVIcontrol. The results show the ability of the MTVI control to limit voltage and current perturbations in the MMC and to provide better voltage and current profiles compared to the classical TVI during unbalanced faults

   Multiple generator's stator windings as voltage sources for a multilevel converter
By Tal TAYAR, Doron SHMILOVITZ [View]
[Download]

Abstract: It is proposed to use a generator's stator windingsto create multiple, isolated voltage sources for multiplemultilevel converters (MC). Under this approachthe generator windings are viewed as transformerwindings, with multiple secondary windings.Thus, we propose to redesign the stator windingsas multiple transformers hence turning a single 3-phase output multiple 3-phase outputs. Afterrectifying the outputs, they function as separateisolated DC voltage sources, which are applied toan MC's input. Taking advantage of the readilyexisting generator's magnetics, no additionalmagnetic components are required under theproposed method.

EPE 2025 - LS1a: AC/DC and DC/AC Converter Topologies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2025 - Conference > EPE 2025 - Topic 09: Power Converter Topologies > EPE 2025 - LS1a: AC/DC and DC/AC Converter Topologies
	[return to parent folder]

	Advanced DC Voltage Control Technique for Converters: Achieving Superior Speed and Stability with Model Predictive Control By Farrukh ZEB, Mobina POURESMAEIL, Edris POURESMAEIL, Jorma KYYRA	[View] [Download]
Abstract: Among different converter topologies, the active front-end (AFE) rectifier has been widely used in recent research for generating controlled output DC power. Simultaneously, model predictive control (MPC) has emerged as a prominent and actively researched topic, particularly for its applications in development of advanced control strategies. In this paper, a control method is presented that leverages the predictive capability of MPC to achieve the desired reference power through the DC power generated by the AFE rectifier. A new exponential function has been introduced in the proposed control method as a dynamic reference power for the MPC. This reference power can be updated according to the DC-link voltage requirements for an effective DC voltage regulation. Finally, the performance of the proposed control method is compared with the performance of the conventional PI-based control method and preceding MPC-based control techniques, to validate its superiority over the existing control methods. Implemented and verified in Matlab Simulink, this technique shows five-time faster recovery and zero steady state error.

	An AC fault ride-through control of modular multilevel converters for HVDC systems By Sidlawendé OUOBA, Florent MOREL	[View] [Download]
Abstract: This paper proposes a modified threshold virtual impedance (MTVI) control to ensure an AC fault ride-through (FRT) for modular multilevel converters (MMCs). The proposal limits the AC current of the MMC by virtually increasing its output impedance. It prevents to trigger its protection systems when a fault occurs. Compared with conventional TVI control, the proposed method avoids not only MMC blocking but also increases its power quality by providing undistorted voltage and current waveforms in the case of asymmetrical faults. Simulations in MATLAB/Simulink are carried out to validate the effectiveness of the proposed MTVI control, which is compared with the conventional TVIcontrol. The results show the ability of the MTVI control to limit voltage and current perturbations in the MMC and to provide better voltage and current profiles compared to the classical TVI during unbalanced faults

	Multiple generator's stator windings as voltage sources for a multilevel converter By Tal TAYAR, Doron SHMILOVITZ	[View] [Download]
Abstract: It is proposed to use a generator's stator windingsto create multiple, isolated voltage sources for multiplemultilevel converters (MC). Under this approachthe generator windings are viewed as transformerwindings, with multiple secondary windings.Thus, we propose to redesign the stator windingsas multiple transformers hence turning a single 3-phase output multiple 3-phase outputs. Afterrectifying the outputs, they function as separateisolated DC voltage sources, which are applied toan MC's input. Taking advantage of the readilyexisting generator's magnetics, no additionalmagnetic components are required under theproposed method.