Load-flow control with FACTS devices in competitive markets

On the basis of the increasing importance of the exchange of electrical energy between partners in an interconnected power system, the use of FACTS devices to control power transits is examined. The exact derivation of the necessary control values for the FACTS devices is presented with generally valid equations especially for long lines and weakly meshed power systems. The important influence of the available reactive power is also discussed for these cases. Finally various transeuropean transit scenarios are examined in a model of the eastern European power system. Nonconducted power transits are compared with the direct and the indirect conduction method and the results of load flow calculations allow an assessment of these methods of conducting power transits.