Voltage harmonic reduction using passive filter shunt passive-active filters for non-linear load

We know that the rise of harmonics is a major problem now days in non-linear loads. The universal use of non-linear loads like in power electronics equipment which amplified the harmonic-related difficulties in service and trade power systems this make an essential requirement of filter. The nonlinear loads be compensated & sometime we can identified but sometimes they include their own non characteristic harmonic portion & not ideal as it is actual in input & voltage sag occur so many times in a day. As increasing the harmonic magnitude component contribution of key problem also rises in industrial sector, so this is a very complex in power system, to overcome we using different methods to reduce this major problem. This paper is presents a proposed model of passive Alter & combination of shunt active & passive filter to reducing harmonic limits in single-phase system as tracked by IEEE std. 519-1992.