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WECS & T&D 2012 - 06 - LS - Wind Energy Conversion
You are here: EPE Documents > 03 - EPE Seminar Papers > 006 - EPE Joint Wind Energy and T&D Chapters Seminar (2012) > WECS & T&D 2012 - 06 - LS - Wind Energy Conversion
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	An Innovative Bidirectional Isolated Multi-Port Converter with Multi-Phase AC Ports and DC Ports - Paper   By F. Jauch; J. Biela	[View]   [Download]
Abstract: This paper presents an innovative bidirectional isolated multi-port converter with multi-phase AC ports and DC ports, which is a key element of Solid-State Transformers (SST) utilized for example in a wind energy generation system. The multi-port converter allows the direct coupling of the threephase AC system of the power generator with the three-phase AC utility grid and an additional DC storage unit applying a single high-frequency transformer structure. The topology is stackable and hence, single converter modules can be connected in series at the input/output ports for medium or high voltage or in parallel for low voltage applications. The converter is operated utilizing a time-varying phase-shift control to draw or inject sinusoidal currents with a corresponding amplitude and phase at the AC ports. The topology, its operating principle including the theoretical analysis and simulation results of a prototype system are provided.
	An Innovative Bidirectional Isolated Multi-Port Converter with Multi-Phase AC-Ports and DC-Ports - Presentation   By F. Jauch; J. Biela	[View]   [Download]
Abstract: The presentation of "An Innovative Bidirectional Isolated Multi-Port Converter with Multi-Phase AC-Ports and DC-Ports"
	Multilevel Converters for a 10 MW, 100 kV Transformer-less Oshore Wind Generator system - Paper   By T. M. Iversen; S. Gjerde; T. Undeland	[View]   [Download]
Abstract: The nacelle weight reduction is a key design criterion for oshore wind turbines, when these are reaching towards 10 MW. To overcome the weight challenge, a transformer-less concept is under development. This concept employs a special permanent magnet synchronous generator (PMSG) with an innovative system for high insulation level. The generator supplies nine series connected converter modules, which results in a high voltage DC output of 100 kV, reducing the total weight of the system. The work presented here focuses on one of the 11.1 kV converter modules, and identies the modular multilevel converter (MMC) as the best suitable candidate for the proposed system. The comparison criteria are qualitative: no direct series connection of IGBTs, converter eciency, voltage quality and redundancy for increased reliability. Simulations in PSCAD/EMTDC are presented, with focus on redundancy, submodule voltage balancing, and implementation of the MMC in full system models. The results show that the MMC performs well in the full system, and is therefore considered as a viable converter for the proposed system.
	Multilevel Converters for a 10 MW, 100 kV Transformer-less Offshore Wind Generator system - Presentation   By T. M. Iversen; S. Gjerde; T. Undeland	[View]   [Download]
Abstract: The presentation of "Multilevel Converters for a 10 MW, 100 kV Transformer-less Offshore Wind Generator system"
	Low Voltage Fault Ride Through for Offshore Wind Farms with MMC-HVDC Connection - Presentation   By S. K. Chaudhary; R. Teodorescu; U. Gnanarathna; A. M. Gole	[View]   [Download]
Abstract: The presentation of "Low Voltage Fault Ride Through for Offshore Wind Farms with MMC-HVDC Connection"