Power Quality Improvement by using Shunt Active Power Filter at Various Load Conditions Using Source Side Sensing Control

Power quality problems such as three-phase unbalanced and harmonics, reactive power, power factor and so on, have become serious increasingly, passive power filter may not provide better solution and the development of APF has been one of the ways to solve these problems. This paper presents a three-phase, 3-level voltage source inverter based active filter for power line conditioning to improve power quality in the distribution network. The active filter compensates both reactive power and harmonic currents drawn by non-linear loads; additionally it facilitates power factor corrections. The compensation process is based on concept of source side sensing. This proposed 3-level active power filter system is validated through MATLAB/SIMULINK Platform with different load conditions.

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