Implementation of Digital Automatic Voltage Regulator (AVR) for small laboratory alternator

This paper presents a simulation process for an alternator showing its performance characteristics with and without an automatic voltage regulator (AVR) connected to it as a part of work done for Project Stage I. Simulations were carried in MATLAB environment. The objective of this work was to get to know the effect of AVR on the system. The restoring capability of an AVR by changing the various load conditions and the level of excitation input to the system is seen. The simulation worked in two ways viz (a) With a constant mechanical input to the alternator, (b) With the mechanical input of the alternator controlled by AVR. The details of the results of the systems performance of the whole system are given in the following paper. Parallel to these simulations, hardware experimentation was also carried out. Experimental results were also obtained with laboratory set-up which will help to design the AVR.