Improving the stability of the power systems in the presence of SSSC with PMSG via applying a backstepping control scheme

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Document Type : Original Article

Authors

1 Faculty of Engineering, University of Shahrekord, Shahrekord, Iran, Email: abazari-s@eng.sku.ac.ir

2 Faculty of Electrical Engineering, University of Shahrekord, Shahrekord, Iran

3 Department of Electrical Engineering,, Faculty of Engineering,, Shahrekord University, Shahrekord, Iran.

Abstract

Abstract
This article addresses the improvement of power system stability in the presence of SSSC with PMSG. A particular nonlinear control law based on a multi-input backstepping scheme is proposed. The main challenges in the power system are the instability caused by disturbances such as short circuits, large load disconnections, and changes in system topology. This control method effectively leads to a better performance in damping angular oscillations in comparison with conventional linear schemes. In this approach, a sliding mode observer is used to estimate time derivatives in the controller design formulas, and the Particle Swarm Optimization (PSO) algorithm is employed to determine the coefficients of the nonlinear controller. Additionally, the proposed method is robust against changes in system parameters and the location and timing of disturbances. This study demonstrates that the performance of PMSG is superior to that of DFIG in wind turbines at equal power levels and under identical circumstances in terms of damping oscillations. Implementation of PMSG leads to a more effective and rapid response with respect to applying DFIG. The new control law has been investigated on a 39-bus New England network using MATLAB coding. The simulations results indicate that the performance of the proposed method is superior to that of conventional linear techniques.

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Tabriz Journal of Electrical Engineering

Articles in Press, Corrected Proof
Available Online from 05 March 2025

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