Modeling and simulation of generalized unified power flow controller (GUPFC)

This paper presents the establishment of a linearised Pillips-Heffron model of a power system installed with a generalized unified power flow controller (GUPFC) for a specific case in the single machine infinite bus (SMIB) system where the lines have no equal reactance. On the basis of the linearised, the damping function of the GUPFC is investigated. The basic issues on the design of the GUPFC damping controller are discussed, regarding the effectiveness and robustness of the damping function of the GUPFC, among which the selection of effective and robust input control signal of the GUPFC to superimpose its damping function where it is specially addressed. Furthermore it becomes one of the most important FACTS controller and new, which adds the GUPFC into the category of the unified model with the same methods. An example power system is presented, in the SMIB, where its performance more robust than the unified power flow controller (UPFC).