Supervisory Trained Sine Wave Template for Reduction of Harmonic Source Current from Computer Loads

Abstract

Recently, power quality is referred to the ability of the electric utilities to supply electric power without interruption. Today, the phrase encompasses the deviation from a perfect sinusoidal waveform leading to reduction of power quality. Power quality also relates to short-term transients as well as continuous state distortions in power system. If this harmonics are an intruded in the source means it gives continuous state problem with dangerous results. However harmonics can be present in current, voltage, or both. It is estimated that as many as 60% of all electrical devices operate with non-linear current draw. The utility companies invest millions of dollars each year to ensure that voltage supplied to their customers is as close as possible to a sinusoidal waveform. In this paper harmonics are examined from various loads and method of reductions are defined by using intelligent controllers.