Coordination control of PSS and SVC for damping of low frequency oscillations

Power System Stabilizer controller (PSS) and Static Var Compensator (SVC) with damping controller can effectively damp power system oscillations. In order to eliminate the adverse effects between controllers caused by improper setting of parameters, coordination control of PSS and SVC is studied in this paper using bacterial colony chemotaxis (BCC) optimization algorithm, to improve dampings of electromechanical oscillation modes. Case study based on Two-Area with Four-Machine System, in both eigenvalue analysis and time domain simulation, confirms that the method is valid, and the simulation result shows that the optimal scheme obtained by method proposed in this paper can effectively damp low frequency oscillation and enhance the system small signal stability.