PSO optimized PID regulator for a variable frequency brushless synchronous generator

Abstract

The aim of this paper is to describe development of a new control structure for Automatic Voltage Regulator system. This approach is based on the optimization of the control voltage magnitude of a brushless excitation synchronous alternator machine operating at variable speed. The choice of the machine type is justified by its attractiveness in several areas such as the aircraft domain due to its autonomy and robustness. The considered control technique is based on the simultaneous optimization of two regulators introduced in the loop control. The parameters of the Proportional Integral Derivatives (PID) regulator have been optimized using the Particle Swarm Optimization (PSO), which is considered as an attractive method considering the wide operating speed range, and the load variations compared with the classical methods such as Ziegler Nichols. Many robustness tests are carried out by considering the parameters variations as well as the perturbation connection and disconnection of the load at low and high speeds.