Cuckoo Search Optimization algorithm for designing of multimachine Power System Stabilizer

Abstract

This paper presents Cuckoo Search Optimization (CSO) algorithm for robust designing of Power System Stabilizer (PSS) of New England system to damp out low frequency oscillations. In this work; a conventional lead-lag speed-based PSS is used. An eigenvalue based optimization problem involving the damping factor and damping ratio is formulated for tuning of PSS parameters. The CSO based PSS (CSOPSS) parameters are designed to transfer the lightly damped or unstable eigenvalues for varying loading conditions and severe line outage to a D-shape region in the left-half of the s-plane. The effectiveness and capability of CSOPSS is observed by eigenvalue analysis; non-linear simulations; performances indices and results are compared with GA based PSS (GAPSS) under different loading conditions and severe line outage. From the results; it is found that CSOPSS produces better damping characteristics and relative stability compare to GAPSS for small signal stability enhancement.