The energy market liberalization requires using the actual transportation network in a more flexible and more efficient way. What is needed are strategies and facilities that will improve the energy flux sharing, as well as the maintaining of the node voltages. These goals can only be partially reached in the conventional networks. However, the FACTS are offering a very promising solution. The UPFL (Unified Power Flow Controller) will be briefly presented as an example of FACTS, and its behaviour will be illustrated with simulations.