PSS and TCSC damping controller coordinated design using GSA

A novel developed heuristic global optimization algorithm, called gravitational search algorithm, is applied for simultaneous coordinated designing of the power system stabilizer and thyristor controlled series capacitor as a damping controller in the multi-machine power system. The coordinated design problem of controllers over a wide range of loading conditions is formulated as a multi-objective optimization problem. The eigenvalues analysis and nonlinear simulation results demonstrate the high performance of the proposed controllers and their ability to provide efficient damping of low frequency oscillations. Also, the proposed coordinated controllers have an excellent capability in damping inter-area oscillations and enhance greatly the dynamic stability of the power system.