ABSTRACT
In a very broad sense, power quality refers to maintaining the sinusoidal nature of voltage and current of the fundamental frequency at all parts of the power system network. The power quality is also an important aspect from the point of view of economic consideration, as it saves the electrical energy in appliances. In general, voltage quality implies current quality and vice-versa, because voltage and current quantities interact through the transmission and distribution line impedances. The product of voltage quality and current quality reflects the quality of the power supply. While the quality of voltage is determined from the source side, the current quality comes from the load side.
