Output voltage control of synchronous generator using Nelder –Mead algorithm based PI controller

Abstract

In this paper, Nelder-Mead simplex algorithm (NMA) is proposed to tune the optimal parameters of a proportional integral (PI) controller for the output voltage regulation of synchronous generator through different loading conditions. The model of the SG is related to diverse loads in two ways. Firstly, each load is related separately and secondly the SG loads change through the operation in order to guarantee the robustness of controller for large load deviations. In addition, parameters of the PI controller are obtained by minimization of the quadratic output error between the reference voltage and the terminal voltage of the generator calculated from the adopted model at the same time. Simulation results obtained by MATLAB and Simulink are investigated for output voltage regulation of SG without any controller at first, then with PI controller. In order to evaluate the performance of the NMA-PI controller, the results are compared with the Hooke and Jeeves (H&J) method. The comparison shows that the NMA tuned PI controller has better control performances versus the (H&J) method.