Damping of Oscillations in Series Compensated Power System through Wide Area Damping Controller of STATCOM

In FACTS devices auxiliary signals are widely used to enhance damping and mitigation of Subsynchronous Resonance in Power System. Choice of auxiliary signal is indeed a difficult choice. Auxiliary signal may be local signal or remote signal. In this paper STATCOM is installed in the middle of Power system and it is shown that deviation in speed of generator rotor is one of the most suitable auxiliary signal. This signal is a remote signal hence a suitable time delay is considered. Study system is IEEE first benchmark model. Modeling of STATCOM with IEEE first benchmark model is presented in detail. All the differential equations and initial conditions are presented in the paper. Both, small signal and large signal stabilities are carried out.