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Minimum DC link Voltages for the Generator Bridge Converter of a SCIG Based Variable Speed Wind Turbine with Fully Rated Converters

DAYARATNE, Upendra and TENNAKOON, Sarath and KNIGHT, J.S. and SHAMMAS, Noel (2011) Minimum DC link Voltages for the Generator Bridge Converter of a SCIG Based Variable Speed Wind Turbine with Fully Rated Converters. In: International Conference on Renewable Energies and Power Quality (ICREPQ 11), 13th to 15th April, 2011, Las Palmas de Gran Canaria (Spain).

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Abstract or description

Squirrel Cage Induction Generator (SCIG) based variable speed wind turbine with Fully Rated Converters (FRC) is a popular choice in the industry for the modern multi mega-watt wind turbines. Typical FRC system uses a fixed DC link voltage that allows operation in all steady state and dynamic operating conditions while allowing the modulation index of the PWM scheme to vary. However, the analysis made in this paper shows that at steady state, in the maximum power point tracking region where the turbine is operated at variable speeds with generator controlled using Rotor Flux Oriented Control (R-FOC), it is possible to operate the Generator Bridge (GB) converter with significantly lower DC link voltages than the fixed value used, by maintaining maximum modulation index in the PWM scheme. This paper presents a methodology of determining the minimum DC link voltages for such a system supported by simulation results showing the successful operation of a GB converter with minimum DC link voltages in the maximum power point tracking region.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: DC link voltage, Modulation Index, IGBT, Generator Bridge Converter, SCIG
Subjects: H100 General Engineering
H600 Electronic and Electrical Engineering
Faculty: Faculty of Computing, Engineering and Sciences > Engineering
Related URLs:
Depositing User: Sarath TENNAKOON
Date Deposited: 24 Sep 2013 15:02
Last Modified: 24 Sep 2013 15:25
URI: http://eprints.staffs.ac.uk/id/eprint/1609

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