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RISS 인기검색어
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- 저자 : Badr M. Alshammar (검색결과 1 건)
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New Chaotic Sunfl ower Optimization Algorithm for Optimal Tuning of Power System Stabilizers
Badr M. Alshammar,Tawfik Guesmi 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.5
Purpose The problem of stability is generally caused by insuffi cient damping of electromechanical oscillations (EMOs). Power system stabilizers (PSSs) are the most advised and effi cient devices to increase the system damping and enhance the dynamic characteristics of power networks during abnormal conditions. Unfortunately, the performance of the PSS controller is mostly dependent on the parameters of the lead-lag compensator. Within this context, this study presents a new chaoticbased sunfl ower optimization algorithm with local search (CSFO-LS) for optimum design of PSS controllers. Methodology In the proposed algorithm symbolized by CSFO-LS, the random parameters of the original SFO are substituted by chaotic sequences to avoid premature convergence at local optima and improve the accuracy of the optimum solution. Firstly, the CSFO-LS is tested and evaluated on various benchmark functions with diff erent characteristics such as multimodality, separability and regularity. Then, it is applied for selecting the optimum parameters of the PSS controllers. These parameters are tuned in order to shift all electromechanical modes in a pre-specifi ed zone in the left side of the s -plan. Results Simulation results based on eight benchmark functions show that CSFO-LS outperforms all the algorithms used for comparison. Moreover, to demonstrate the applicability and performance of the proposed method for providing good damping of low frequency oscillations, a standard power system test under various operating conditions and severe fault is used. Obtained results are compared with those obtained using the original SFO and other recent optimization techniques. Originality In this study, an improved version of the SFO is proposed for providing optimum EMOs damping. All EMOs have to be shifted as much as possible to the left side of the s -plan instead of shifting them to a fi xed zone. To our best knowledge, this technique is not suggested or used for any power system problem.
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