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A transformer-less compact and light wind turbine generating system for offshore wind farms

Conference Paper


Abstract


  • Offshore wind turbines are distributed in a wide area where the power is generated usually at low voltage levels of 380~690 V. To reduce electrical power transmission losses, a low-frequency transformer is placed inside the nacelle of the offshore wind turbine to step-up the voltage up to the voltage levels of 11~33 kV. The heave weight and large size of the step-up transformer significantly increase the weight and volume of the nacelle. These penalties are critical in offshore applications, where cost of installation and regular maintenance are extremely high. As an alternative approach to achieve a compact and light offshore wind turbine a medium-voltage converter using series connected H-bridge multilevel converter topology is proposed in this paper. The transformer-less approach thus leads to a compact and environmentally friendly design, which can save large amount of installation, running and maintenance costs of offshore wind turbines. This paper mainly focuses on design and simulation of 33 kV offshore wind turbine generating system.

UOW Authors


  •   Islam, Md Rabiul
  •   Guo, Youguang (external author)
  •   Zhu, Jianguo G. (external author)

Publication Date


  • 2013

Citation


  • M. Islam, Y. Guo & J. Zhu, "A transformer-less compact and light wind turbine generating system for offshore wind farms," in IEEE International Conference on Power and Energy (PECon 2012), 2013, pp. 605-610.

Scopus Eid


  • 2-s2.0-84874498661

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1158

Start Page


  • 605

End Page


  • 610

Place Of Publication


  • United States

Abstract


  • Offshore wind turbines are distributed in a wide area where the power is generated usually at low voltage levels of 380~690 V. To reduce electrical power transmission losses, a low-frequency transformer is placed inside the nacelle of the offshore wind turbine to step-up the voltage up to the voltage levels of 11~33 kV. The heave weight and large size of the step-up transformer significantly increase the weight and volume of the nacelle. These penalties are critical in offshore applications, where cost of installation and regular maintenance are extremely high. As an alternative approach to achieve a compact and light offshore wind turbine a medium-voltage converter using series connected H-bridge multilevel converter topology is proposed in this paper. The transformer-less approach thus leads to a compact and environmentally friendly design, which can save large amount of installation, running and maintenance costs of offshore wind turbines. This paper mainly focuses on design and simulation of 33 kV offshore wind turbine generating system.

UOW Authors


  •   Islam, Md Rabiul
  •   Guo, Youguang (external author)
  •   Zhu, Jianguo G. (external author)

Publication Date


  • 2013

Citation


  • M. Islam, Y. Guo & J. Zhu, "A transformer-less compact and light wind turbine generating system for offshore wind farms," in IEEE International Conference on Power and Energy (PECon 2012), 2013, pp. 605-610.

Scopus Eid


  • 2-s2.0-84874498661

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1158

Start Page


  • 605

End Page


  • 610

Place Of Publication


  • United States