Intelligent FACTS controller based on ANFI architecture

A prospective application of applying an adaptive controller to a Static Var Compensator (SVC) to damp power system oscillations and enhance system stability is presented in this paper. The proposed adaptive controller consists of two parts, an adaptive neuro-identifier (ANI) and a Neuro-fuzzy Controller. The adaptive neuro-identifier is used in the control strategy to identify the plant dynamics and predict its output one step ahead. The parameters of the neuro-fuzzy controller are optimized on-line using the gradient descent algorithm. The effectiveness of the proposed technique is demonstrated on an SVC located at the middle of a transmission line connecting a generator to an infinite bus. Results of simulation studies show an improvement in the overall system damping characteristics with the proposed controller.