Harmonic Reduction by Shunt Active Filter in a Transformer LT Distribution Network

This paper is about the modelling of a power distribution network in which nonlinear loads are also placed for the generation of harmonics. Now a day’s various electronic variable drives and other devices that generates harmonics are extensively used by the commercial and industrial consumers. The amount of harmonics generated by a single device is negligible but if the devices are in a large numbers that will make a considerable impacts at the point of common coupling. Several problems occur in the system like sag swell, voltage flicker, unwanted heating of the instruments or the circuit in which the devices connected so this becomes an important issue to resolve. In this a shunt active filter has been modelled with the system for the reduction of harmonics in a permissible limit. IEEE set up the standards for the harmonic limitations and the baseline standards has to follow strictly for all the industrial and commercial consumers.