SUBSYNCHRONOUS RESONANCE MITIGATION USING WIDE AREA MEASUREMENT SYSTEM

This paper presents the wide area measurement based controller for subsynchronous resonance mitigation in two machine system. The dq0 model of the two machine system.is considered in this paper. Generator 1 is multimass model as per given in IEEE first bench mark model and genereator 2 is considered as lumped model. The computation of frequency from voltage phasor of each generator is used for SSR mitigation. The difference of frequency of two machine is used as control signal . This control signal modulate the firing angle of thyristor controlled reactor through controller .As the control signal is global signal ,it will give damping to almost all torsional modes of oscillation and eliminates local controller for each torsional modes. This paper shows application of wide area controller in dq0 model mitigates subsynchronus oscillation in system..