Harmonic and neutral to ground voltage reduction using isolation transformer

Service reliability and quality of power have become a growing concern especially with the increasing sensitivity of electronic equipment which generates harmonic current and voltage in distribution system posing new problems for electrical engineers. This power quality problem is of prime concern due to non-linear loads showing distorted current and voltage waveforms. An unexpected side effect of distributed non-linear loads is an increase in neutral-ground voltages on distribution systems. In this paper, a study was done to determine the power quality for the several computer labs at UiTM Penang. The reduction of harmonic voltage and neutral to ground voltage using isolation transformer was analyzed. Isolation transformer is used to improve the harmonics as well as neutral to ground voltage. The findings identified the harmonic content is in full compliance with the IEEE standards.