INTERNATIONAL JOURNAL OF ENGINEERING, SCIENCE AND - Volume 6, Issue 8,, December 2017 (Special Issue)

Pages: 819-828

Date of Publication: 24-Dec-2017

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Gravitational Search Algorithm based Optimal Design of

Multi Objective Power System Stabilizers

Author: BHARANIKANI V KRISHNA* MAHESH SATHI** G V RAO*** Y DURGA PRASAD

Category: Engineering, Science and Mathematics

Abstract:

This paper proposes a new optimization algorithm which is based on the law of gravity and mass interactions called Gravitational Search Algorithm (GSA) for optimal design of power system stabilizers (PSS). The parameters of the proposed GSA based PSS (GSAPSS) are formulated as amulti objective optimization problem and optimized in order to damp all the unstable electromechanical modes of the system and to shift them to the left in S-plane. The performance of the proposed GSAPSS is tested on the WSCC 3-machine, 9-bus power system under different operating conditions and system configurations. The test results are compared with conventional PSS (CPSS) and Genetic Algorithm based PSS (GAPSS) to validate the efficacy and superiority of the proposed approach.

Keywords: Electromechanical oscillations; GravitationalSearch Algorithm; Optimization; Power system stabilizer