1. Understanding FACTS—Concepts and Technology of Flexible AC Transmission Systems;Hingorani,2001
2. The unified power flow controller: a new approach to power transmission control;Gyugyi;IEEE Trans. Power Delivery,1995
3. A. Nabavi-Niaki and M.R. Iravani, “Steady State and Dynamic Models of Unified Power Flow Controller (UPFC) for Power System Studies”, in IEEE 96 Winter Meeting, 1996. paper 96 WM 257-6 PWRS.
4. Use of UPFC for optimal power flow control;Noroozian,1995
5. A comprehensive Newton-raphson UPFC model for the quadratic power flow solution of practical power networks;Fuerte-Esquivel;IEEE Trans. Power Syatems,2000