A new design of double input power system stabilizers using SQP for interconnected power systems

Double input Power system stabilizers (PSSs) are recently used in power system to damp out low frequency oscillations. This paper presents a new design for PSSs with dual inputs (PSS2B, PSS3B, PSS4B) using sequential quadratic programming (SQP). The proposed method is simple, effective and can guarantee that the overall system performance is desirable. The simulation results using single machine and multi machine power systems show that the transient performance of dual-input PSS is better than single-input PSS. It is, further, explored that among dual-input PSSs, PSS4B offers superior transient performance. Comparative results of the proposed SQP method and other intelligent methods, PSO, GA and BFA, reveal that the new proposed control strategy has a better robustness and performance over other existing techniques.