Optimal Control Schemes for Power System with Unified Power Flow Controller (UPFC)

FACTS devices are one aspect of power electronics revolution that is taking place in all areas of electrical energy. A variable of powerful semiconductor devices not only offer the advantage of high speed and reliability of switching but more importantly the opportunity offered by a variety of innovative circuit concepts based on these power devices enhance the value of electric energy. Most of the control schemes of FACTS devices introduced in the existing papers were designed either for eliminating current harmonics or eliminating voltage flickers or for load flow control. So this work is devoted to find a proper optimal control schemes for a system with series or shunt or series and shunt converters that can provide all functions together. Various optimal control schemes will be designed for systems with series shunt and series-shunt converters with the objective to control the load flow through a lines and to eliminate current harmonics and voltage flickers with different strategies for tracking. ·         Part 1: Gives the description of optimal control design. ·         Part 2: Case studies to design different optimal control schemes for system with UPFC unit to control the power flow eliminate voltage flicker and eliminate current harmonics. The case studies were repeated for system with only series or shunt converters.