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Design of an LCL-Filter for Three-Parallel Operation of Power Converters in Wind Turbines

  • Jeong, Hae-Gwang (Department of Electrical and Computer Engineering, Ajou University) ;
  • Yoon, Dong-Keun (Research Group, LG Innotek Co., Ltd.) ;
  • Lee, Kyo-Beum (Department of Electrical and Computer Engineering, Ajou University)
  • Received : 2012.07.16
  • Published : 2013.05.20

Abstract

This paper proposes a design scheme for an LCL-filter used for the three-parallel operation of the power converters in high-capacity wind turbines. The designs of the power devices and grid connected filter are difficult due to the high level voltages and currents in huge-capacity wind turbines. To solve these problem, this paper presents three-parallel operation and LCL-filter design techniques optimized by parallel operation. Furthermore, the design of an inverter side inductance of the LCL-filter is discussed in detail considering the switching modulation method. Simulation and experimental results demonstrate the validity of the designed filter and wind turbines.

Acknowledgement

Supported by : KETEP

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