Placement of SVCs and selection of stabilizing signals based on observability and controllability

Static Var Compensator (SVC) is a kind of FACTS device which is used in power system primarily for the purpose of voltage and reactive power control. Based on wide area signals, this paper presents a systematic approach for designing SVC supplementary controller, which is used to improve the damping of power system oscillation. The principle for damping oscillation by SVC is first analyzed and the concept of synthetic observability and controllability is then presented which is used to choose the proper wide area input signals and the placement of SVCs. Parameters of the controller are determined by the residue phase compensation method. Eigenvalue analysis and time domain simulations are performed on a 16-machine system and the results demonstrate the effectiveness of the proposed controller.