Allocation and control of FACTS devices for steady-state stability enhancement of large-scale power system

FACTS devices are recognized as a new damping resource for poorly damped, low frequency electromechanical oscillation, which usually takes place in a power system operating with long transmission lines under heavily loaded condition. Nevertheless, the damping effect of FACTS devices is known to be strongly influenced by their location and control system. This paper is motivated to cope with these two challenges. By ways of modal analysis, a location index for determining FACTS optimal location is proposed which is suitable and feasible for large scale power systems. A method for tuning parameters in the FACTS control system with a given configuration is presented simultaneously. Numerical results for a 7-machine power system has shown the validity and efficiency of the proposed method.