Robust control of power system using shunt FACTS controllers

The power demand is increasing continuously day by day. The real time power system parameters are continuously changing due to varying loading conditions, internal and external disturbances. The low frequency oscillations (LFO) are a major concern in modern stressed power system. In case if low frequency oscillations are not damped effectively, it may leads to failure of system stability and also deteriorate the power system performance. To balance the outcome of system parameters and loading uncertainties on the power system performance, robust shunt flexible AC transmission system controllers (FACTs) have been widely explored by modern power system practitioners. These controllers are able to effectively damp out the low frequency oscillations, enhance the power system stability and power flow control through the existing transmission lines. Different types of robust shunt FACTs technologies including real world installations and utility experiences have been reviewed by this paper. The comprehensive literature review show the remarkable capability of shunt FACTS controllers to get better dynamic stability voltage control and power transfer capability in the face of uncertainties present in the power system.