An Experimental Approach for Reduction of Harmonics and Improvement of Power Quality in Power Systems

Harmonics plays a major dispute in day to day life mainly in power systems. Harmonics is a multiple of fundamental frequency. Among various harmonic reduction technique such as line reactor, 12 pulse converters, 12 pulse distributors, etc., passive filter method has a considerable importance. The AC component from the rectified output is eliminated using a device called filter circuit. Passive filter circuit is a combination of Inductor (L) and Capacitor(C). The inductor and capacitor combination will suppress high AC frequency, when the AC component is reduced automatically the harmonics is also reduced. The main advantages of this method is, they do not devoir additional DC supply, they grasp large voltage, current and power and also passive filter cost is low. This method will reduce harmonics percentage in greater amount and so reduction of harmonics will improve power quality.