Variable frequency transformer - an overview

Variable frequency transformer (VFT) is a controllable bi-directional transmission device that can transfer power between asynchronous networks. The construction of VFT is similar to conventional asynchronous machines. Electrical power is exchanged between the two networks by magnetic coupling through the air gap of the VFT. This paper gives an overview of the VFT

[1]  E. V. Larsen.  A classical approach to constructing a power flow controller , 1999, 1999 IEEE Power Engineering Society Summer Meeting. Conference Proceedings (Cat. No.99CH36364).

[2]  R.J. Piwko,et al.  Variable frequency transformer - a new alternative for asynchronous power transfer , 2005, 2005 IEEE Power Engineering Society Inaugural Conference and Exposition in Africa.