Automatic Voltage Regulator Design Enhancement Taking Into Account Different Operating Conditions and Environment Disturbances

F. Ahcene, H. Bentarzi, A. Ouadi


In large power systems as well as in micro-grids, the generation of electrical energy is ensured by the synchronous generators, the enhancement of their dynamic performance during disturbances is increasingly required. This research work aims to maintain the terminal voltage constant starting by a 1.5 k VA synchronous laboratory power machine with salient pole under different operating conditions and environment disturbances. Then, a second generator of 187 MVA with different exciting systems is studied. A voltage regulation is ensured by a well-known controller named Automatic Voltage Regulator (AVR).  In the first method, this AVR is based on a conventional Proportional Integral (PI) controller.  The used optimization method for the controller parameters determination is the Particle Swarm Optimization (PSO) algorithm.  In the second method, the AVR is based on Active Disturbance Rejection Control (ADRC) that allows controlling uncertain systems, where the dynamic is not well defined as in this application. Both methods are tested under different operating conditions. The obtained simulation results are encouraged to validate the use of the ADRC control in such application.


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