Electric power quality: a tutorial introduction

Electric power quality is an aspect of power engineering that has been with us since the inception of power systems; however, topics in power quality have risen to the forefront since the advent of high power semiconductor switches and networking of transmission and subtransmission systems. Also, the trends in modern power engineering have been to extract the most from the existing installed power system, and this too has placed stress on issues of sinusoidal waveform fidelity, absence of high and low voltage conditions and other AC waveform distortion. A tutorial introduction to the concepts of electric power quality is presented in this paper.