CART Based Wide Area Damping Controller Using Global Inter-Area Signal From WAMS

This paper presents an online scheme of intelligent wide area damping controller based on decision tree (DT) technique using wide area measuring system. In this case, a central damping controller is developed which uses the speed and angle deviations of the oscillating areas as global signals. For this issue, the proposed DT scheme plays as an online gain estimator estimates the controlling gains for direct presentation to exciter systems. The proposed intelligent controller is a non-model and online scheme which plays as global power system stabilizer through real-time environment. In the case of optimizing global controlling signals, considering a set of unstable inter-area oscillations, the proposed DTs are trained off-line which by using inter-area signals in working mode, online controlling gains are estimated. The effectiveness of the proposed control scheme is carried out in the modified IEEE 39-bus test system with indicating positive effects for damping inter-area oscillations.