Robust coordinated AVP plus PSS for damping large scale power systems

A robust coordinated AVR+PSS, called the "Desensitized Four Loop regulator" , has been designed for the French power system and is currently being impl emented. It is shown here that it is possible to transform the structure of this controller into any standard IEEE AYR+PSS structure. The AVR+PSSs obt ained in this manner are efficient for damping all kinds of electromechanic al oscillations of a large scale power system (including inter-area oscilla tions). This approach is combined with modal analysis techniques, Its effic iency has been verified on several large scale systems and is illustrated h ere on a modified version of the New England system The obtained AVR+PSSs h ave a good robustness against significant changes in the characteristics of the network.