Synchronous generator damping enhancement through coordinated control of exciter and SVC

Damping improvement of a weakly connected generating system through control of excitation and static VAr compensators has been investigated. Stabilising signals derived through a minimum time quasioptimum feedback strategy have been tested on a synchronous generator infinite bus system connected through a long transmission line. The response was compared with standard linear state and output regulator formulations. It was observed that although excitation control enhances the stability of the system, the SVC provides most of the damping. The proposed feedback strategy with coordinated control of excitation and SVC were found to provide a much superior response compared to the standard techniques.