EPE Association: EPE 2022 - LS6b: Modular Multilevel Converters

EPE 2022 - LS6b: Modular Multilevel Converters
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2022 ECCE Europe - Conference > EPE 2022 - Topic 02: Power Converter Topologies and Design > EPE 2022 - LS6b: Modular Multilevel Converters

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   Experimental study of the reduction and removal of turn-on snubber for IGCT based MMC submodule using fast silicon diodes
By Arthur BOUTRY [View]
[Download]

Abstract: IGCTs are attractive power semiconductor devices for HVDC applications. However, their switching speed at turn-on can only be controlled by the means of an external snubber circuit, which adds complexity and cost. This paper investigates experimentally the possibility to downsize and even completely remove this turn-on snubber/clamp in the case of an MMC submodule based on 6.5 kV IGCTs, using fast silicon diode modules (rated at up to 13 kA.µs-1). The removal is found to be possible, although limiting phenomena (dynamic avalanche and snap-off) appear, reducing the actual operating range of the submodule.

   Novel Operation Mode of the Modular Multilevel Matrix Converter based on a Dimensioning Algorithm
By Rebecca DIERKS [View]
[Download]

Abstract: The focus of the proposed operation mode of the modular multilevel matrix converter is to find the optimal trade-off between branch energy variation and branch currents. For this purpose, a weighting function is used to calculate the optimal circulating current parameters. This novel approach is compared to existing operation modes and validated on a low-voltage test bench.

   Square wave operation to reduce pulsating power in isolated MMC-based ultrafast chargers
By Ygor PEREIRA MARCA [View]
[Download]

Abstract: This paper presents an application of modular multilevel converters to reduce pulsating power, and therefore sub-modules in ultrafast chargers. The converter's analysis and a control scheme were presented to realize bidirectional power transfer between a three-phase medium-voltage grid and a single-phase medium-frequency transformer with square-shaped voltage, successfully reducing power fluctuation.

EPE 2022 - LS6b: Modular Multilevel Converters
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2022 ECCE Europe - Conference > EPE 2022 - Topic 02: Power Converter Topologies and Design > EPE 2022 - LS6b: Modular Multilevel Converters
	[return to parent folder]

	Experimental study of the reduction and removal of turn-on snubber for IGCT based MMC submodule using fast silicon diodes By Arthur BOUTRY	[View] [Download]
Abstract: IGCTs are attractive power semiconductor devices for HVDC applications. However, their switching speed at turn-on can only be controlled by the means of an external snubber circuit, which adds complexity and cost. This paper investigates experimentally the possibility to downsize and even completely remove this turn-on snubber/clamp in the case of an MMC submodule based on 6.5 kV IGCTs, using fast silicon diode modules (rated at up to 13 kA.µs-1). The removal is found to be possible, although limiting phenomena (dynamic avalanche and snap-off) appear, reducing the actual operating range of the submodule.

	Novel Operation Mode of the Modular Multilevel Matrix Converter based on a Dimensioning Algorithm By Rebecca DIERKS	[View] [Download]
Abstract: The focus of the proposed operation mode of the modular multilevel matrix converter is to find the optimal trade-off between branch energy variation and branch currents. For this purpose, a weighting function is used to calculate the optimal circulating current parameters. This novel approach is compared to existing operation modes and validated on a low-voltage test bench.

	Square wave operation to reduce pulsating power in isolated MMC-based ultrafast chargers By Ygor PEREIRA MARCA	[View] [Download]
Abstract: This paper presents an application of modular multilevel converters to reduce pulsating power, and therefore sub-modules in ultrafast chargers. The converter's analysis and a control scheme were presented to realize bidirectional power transfer between a three-phase medium-voltage grid and a single-phase medium-frequency transformer with square-shaped voltage, successfully reducing power fluctuation.