Control of Dynamic Voltage Restorer by Chaotic Accelerated Particle Swarm Optimization to Improve Power Quality Indices
نویسنده
چکیده
---------------------------------------------------------------------***-------------------------------------------------------------------Abstract: – Dynamic voltage restorer (DVR) is the mostly used custom power device for improving power quality indices. The main function of DVR is to mitigate the problems of voltage sag and voltage swells. In this paper, DVR is used to control voltage sag as its main objective and to reduce total harmonic distortion (THD) as the second objective. DVR is controlled by proportional-integral (PI) controller. To obtain the optimal values for the coefficients of the PI controller a new control strategy called chaotic accelerated particle swarm optimization (CAPSO) algorithm which is an advanced version of PSO is used. An appropriate objective function for the optimization process is developed by the combination of fuzzy logic and neural network. The simulation results are obtained in MATLAB/SIMULINK software and a comparison is made between the results obtained from simulation of classic PI controller, standard PSO and CAPSO
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