LABORATORY INVESTIGATION OF VARIABLE SPEED CONTROL OF SYNCHRONOUS GENERATOR WITH A BOOST CONVERTER FOR WIND TURBINE APPLICATIONS

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Abstract

This paper includes the experimental and simulated results of variable speed control of a synchronous generator. To achieve controlled variable speed operation, the synchronous generator is loaded with a three phase rectifier and a boost converter. The terminal voltage of the generator can be controlled from the converter’s duty cycle if output voltage of the converter is kept constant. This constant voltage is achieved with the help of a grid side inverter. As the speed and the terminal voltage of the generator are directly related to each other, its speed can be controlled for a given torque. An experimental setup of a 7.5kVA generator is prepared to verify system response. Some interesting aspects concerning distributed capacitance of the generator winding and non-linear speed vs duty-cycle response are observed. Cause and effect of such problems are discussed in this paper. Efficiency measurement showed some promising results and the overall system response is found positive. Also a Matlab simulation is performed for single turbine system including grid side inverter. The results are presented here in brief.
Original languageEnglish
Title of host publicationEWEC2008
Number of pages191
VolumeScientific Proceedings
Place of PublicationBrussels, Belgium
PublisherEuropean Wind Energy Association (EWEA)
Publication date2008
Edition1
Publication statusPublished - 2008
Event2008 European Wind Energy Conference and Exhibition - Brussels, Belgium
Duration: 31 Mar 20083 Apr 2008

Conference

Conference2008 European Wind Energy Conference and Exhibition
CountryBelgium
CityBrussels
Period31/03/200803/04/2008

Keywords

  • synchronous generator
  • variable speed
  • wind turbines
  • boost converter

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