Project Report for Investigation Of Alternators Subjected To Different Loads And Minimization Of Encountered Harmonics

This project analyzes these obtained harmonics and develops a suitable filter to minimize them, and by extension, their ill-effects. It also aims to obtain the voltage regulation of different alternators under varying loads using one of the many methods available, and use this data to compare and contrast the machine performance in different cases. The case study included seeks to correct the common misconception that a machine with high voltage regulation indicates low performance and cannot be used in practice. This analysis gives an insight into the practical regulations obtained, and shows a correlation between the voltage regulations obtained and the variation of loads applied. The proposed harmonic analysis is expected to be useful in the design of harmonic filters, power factor correction devices, et al.

Description

With the increasing concern of the effects of harmonic distortion and the lack of documentation of harmonic problems associated with synchronous machines. It is imperative that work to understand the effects of harmonics on synchronous machines be accelerated. The growing use of power electronic applications has increased the fraction of non-sinusoidal currents and voltages in utility networks. Nonlinear loads, such as arc furnaces and fluorescent lighting, have always existed but were overwhelmed by the linear load of motors and resistance type devices. Today, electronic versions of motors, office and industrial control equipment, and lighting are becoming more common. As the fraction of nonlinear loads has increased, so has the anxiety over the effect of these loads and whether they should be limited. Several standards organizations have or plan to issue limits for these loads. These limits are based on the effects of these loads. However, because this problem has only recently emerged, literature on the effects of this waveform distortion is still inconsistent and incomplete.