1. A unified power flow control concept for Flexible AC Transmission Systems;Gyugyo;IEE Proc C,1992
2. The unified power flow controller: a new approach to power transmission control;Gyugyo;IEEE Trans PWER,1995
3. Steady-state and dynamic models of unified power flow controller (UPFC) for power system studies;Nabavi-niaki;IEEE Trans PWRS,1996
4. Basic control of unified power flow controller;Papic;IEEE Trans PWRS,1997
5. Dynamic modelling of a unified power flow controller;Smith;IEE Proc C,1997