Abstract

Owing to the improvement in power semiconductor devices, now days it is more common to use non-linear devices. But because of these non-linear devices a major problem called harmonics is introduced in the power system which distorts the source current as well as voltage. Hence we have to reduce these harmonics by some means to improve the quality of power. The T.H.D has been improved in the present paper by using Shunt Passive Filter (SPF) and Shunt Active Power Filter (SAPF) and at the end comparative analysis of both the methods has been done. The SAPF uses p-q theory for producing the source current and hysteresis method for generating the gate pulses.