Experimental study of a doubly-fed rotary frequency converter

Yasutoshi Takemoto, Goro Fujita, Ryuichi Yokoyama, Kaoru Koyanagi, Toshihisa Funabashi

Research output: Contribution to journalArticlepeer-review


Wind power generation using an unlimited, natural energy has been getting attention regarding environmental issues in recent years, and the installed capacity of wind power generation system is increasing at a rapid pace, resulting in deterioration of power quality especially in frequency and voltage. This fact will be a big problem in restricting large capacity of wind farms. This paper proposes a new frequency converter: rotary frequency converter (RFC) to moderate the electric output from wind generation, which is to be installed between a set of wind generators and a grid, providing a smoothed electric output, promoting the wind power generation introduction. This mainly consists of a synchronous machine and the adjustable-speed machine. Independent controls of input/output voltage, active power, and reactive power offer electrical separation between the two networks. Experimental study of a prototype model and its characteristics, especially dynamic control, is discussed in this paper.

Original languageEnglish
Pages (from-to)26-34
Number of pages9
JournalElectrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)
Issue number4
Publication statusPublished - 2010 Feb 1


  • Frequency variation
  • Power system interconnection
  • Power transfer
  • Wind farm
  • Wind generation

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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