EPE Association: EPE 2011 - LS2e: Topic 05: High Power Multi-Level Converters and Voltage Regulator Modules

EPE 2011 - LS2e: Topic 05: High Power Multi-Level Converters and Voltage Regulator Modules
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2011 ECCE Europe - Conference > EPE 2011 - Topic 05: Hard Switching Inverters and Control > EPE 2011 - LS2e: Topic 05: High Power Multi-Level Converters and Voltage Regulator Modules

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   10kV/30kA Unipolar Arbitrary Voltage Source for Hardware-in-the-Loop Simulation Systems for HVDC Circuit Breakers
By Christoph CARSTENSEN, JÃ¼rgen BIELA [View]
[Download]

Abstract: In this paper a novel topology for a unipolar arbitrary voltage source for high power Hardware-in-the-Loop Simulation Systems is presented. The maximal output voltage is 10 kV and a maximal output current of 30 kA can be provided for a duration of 20 ms with a maximal current gradient of 200 A/us.

   A Converter Topology for High Current density Drive Applications
By Virginie PERON-GUENNEGUES, Christophe CONILH, Loïc LECLERE [View]
[Download]

Abstract: In the area of marine industry, there is a large interest in converters for high power density. Increasing power above 8MW; pf 0.8; 3,3kV in Medium Voltage Drive leds to either increase voltage or associate drives in parallel. Both solutions consist in doubling the number of components to reach the same power density that means drives with higher footprints and expensive solutions.This paper presents how a 3-level converter structure which was developed to double switching frequency is able to switch 50\% more current, offering a very power dense medium voltage drive to industry.

   Controlling the AC-Side Voltage Waveform in a Modular Multilevel Converter With Low Energy-Storage Capability
By Kalle ILVES, Antonios ANTONOPOULOS, Staffan NORRGA, Lennart ÄNGQUIST, Hans-Peter NEE [View]
[Download]

Abstract: During nominal operation of a modular multilevel converter the stored energy in the submodule capacitorswill vary with time. If the energy storage capability of the capacitors is relatively small comparedto the energy variations, this will give large variations in the capacitor voltages. These voltage variationswill distort the ac-side voltage waveform and induce harmonic components in the current that is circulatingbetween the dc terminals. The adverse effects on the ac-side voltage can be compensated for byidentifying the factors that cause the distortion. It is shown that the compensation can be done by meansof feed forward control while maintaining stable operating conditions and thus eliminating the need ofadditional stabilizing controllers. It is also shown that the voltage controller can be combined with acirculating current controller that removes the harmonics in the current that is circulating between the dcterminals. The functionality of the proposed controller is verified by both simulations and experimentalresults from a 10 kVA laboratory prototype. The simulations illustrate how the proposed controllersuccessfully removes the distortion from the ac-side voltage waveform. The experimental results demonstratestable operation during a step transient when the output power is increased by 125\%.

EPE 2011 - LS2e: Topic 05: High Power Multi-Level Converters and Voltage Regulator Modules
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2011 ECCE Europe - Conference > EPE 2011 - Topic 05: Hard Switching Inverters and Control > EPE 2011 - LS2e: Topic 05: High Power Multi-Level Converters and Voltage Regulator Modules
	[return to parent folder]

	10kV/30kA Unipolar Arbitrary Voltage Source for Hardware-in-the-Loop Simulation Systems for HVDC Circuit Breakers By Christoph CARSTENSEN, JÃ¼rgen BIELA	[View] [Download]
Abstract: In this paper a novel topology for a unipolar arbitrary voltage source for high power Hardware-in-the-Loop Simulation Systems is presented. The maximal output voltage is 10 kV and a maximal output current of 30 kA can be provided for a duration of 20 ms with a maximal current gradient of 200 A/us.

	A Converter Topology for High Current density Drive Applications By Virginie PERON-GUENNEGUES, Christophe CONILH, Loïc LECLERE	[View] [Download]
Abstract: In the area of marine industry, there is a large interest in converters for high power density. Increasing power above 8MW; pf 0.8; 3,3kV in Medium Voltage Drive leds to either increase voltage or associate drives in parallel. Both solutions consist in doubling the number of components to reach the same power density that means drives with higher footprints and expensive solutions.This paper presents how a 3-level converter structure which was developed to double switching frequency is able to switch 50\% more current, offering a very power dense medium voltage drive to industry.

	Controlling the AC-Side Voltage Waveform in a Modular Multilevel Converter With Low Energy-Storage Capability By Kalle ILVES, Antonios ANTONOPOULOS, Staffan NORRGA, Lennart ÄNGQUIST, Hans-Peter NEE	[View] [Download]
Abstract: During nominal operation of a modular multilevel converter the stored energy in the submodule capacitorswill vary with time. If the energy storage capability of the capacitors is relatively small comparedto the energy variations, this will give large variations in the capacitor voltages. These voltage variationswill distort the ac-side voltage waveform and induce harmonic components in the current that is circulatingbetween the dc terminals. The adverse effects on the ac-side voltage can be compensated for byidentifying the factors that cause the distortion. It is shown that the compensation can be done by meansof feed forward control while maintaining stable operating conditions and thus eliminating the need ofadditional stabilizing controllers. It is also shown that the voltage controller can be combined with acirculating current controller that removes the harmonics in the current that is circulating between the dcterminals. The functionality of the proposed controller is verified by both simulations and experimentalresults from a 10 kVA laboratory prototype. The simulations illustrate how the proposed controllersuccessfully removes the distortion from the ac-side voltage waveform. The experimental results demonstratestable operation during a step transient when the output power is increased by 125\%.