Power system stability improvement of wind farm fed to a multi-machine system by using STATCOM

In this paper, a two machine three bus power system network is considered initially. This is simulated in Phasor simulation method. Power and voltage outputs are initially considered. The system is then subjected to 3 phase and single phase to ground fault. The system shows unstable operation, after the application of faults A STATCOM is then connected and improvement in system performance is noted. The STATCOM is then controlled by a POC and its effect on the faulty system is studied. It is seen that with external controller, rating of STATCOM can be reduced. A wind farm is then integrated to the system and its performance during fault condition is studied. Here the system stability with POC controlled STATCOM is also studied.