Power Quality Issues and Harmonics Reduction by Hybrid Filter

Power quality is a measure of ideal power supply system. There are many voltage related power quality issues in the industries like impulse, voltage sag and swell, over and under voltage, flickers, harmonics, voltage interruption etc. but the harmonics is a very commonly and most affected issue in industry , So we focus on the harmonics and brief discussion about other issue. There are many nonlinear devices which are using in industries like air compressors, blowers, VFD operated motors and various air handling units which inject harmonics in to the line, which create power quality problem. Filter is used for reduce harmonics. Many types of filters are available in market like active filter, passive filter, low pass filter, high pass filter, single tuned filter, hybrid filter etc. We use hybrid filter for reduce the harmonics because it reduce the harmonics nearer to zero which is advance than any other filter. Matlab use for hybrid filter simulation and results shows how this filter reduces the harmonics.